{"id":99690,"date":"2026-09-03T00:37:22","date_gmt":"2026-09-02T16:37:22","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/99690.html"},"modified":"2026-09-03T00:37:22","modified_gmt":"2026-09-02T16:37:22","slug":"%e7%ac%ac%e4%b8%80%e6%9d%bf%e5%9d%97%ef%bc%9aandroid-%e7%b3%bb%e7%bb%9f%e5%9f%ba%e7%9f%b3%e4%b8%8e%e8%bf%90%e8%a1%8c%e5%8e%9f%e7%90%86-%e7%ac%ac%e4%b8%80%e7%af%87%ef%bc%9aandroid-%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/99690.html","title":{"rendered":"\u7b2c\u4e00\u677f\u5757\uff1aAndroid \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7\uff1aAndroid \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303"},"content":{"rendered":"

\u7b2c\u4e00\u677f\u5757：Android \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7：Android \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303<\/h2>\n

\u6240\u5c5e\u677f\u5757：\u7b2c\u4e00\u677f\u5757 \u2014 Android \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406<\/p>\n

\u524d\u7f6e\u77e5\u8bc6：\u57fa\u7840\u7684 Linux \u64cd\u4f5c\u7cfb\u7edf\u6982\u5ff5（\u8fdb\u7a0b\/\u5185\u6838\/\u7cfb\u7edf\u8c03\u7528）\u3001Java \u8bed\u8a00\u8bed\u6cd5\u57fa\u7840<\/p>\n

\u672c\u7bc7\u5b9a\u4f4d：\u4ece\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u8ba4\u8bc6 Android \u662f\u4ec0\u4e48\u3001\u7531\u54ea\u4e9b\u5c42\u6b21\u6784\u6210\u3001\u6bcf\u4e00\u5c42\u627f\u62c5\u4ec0\u4e48\u804c\u8d23\u3001\u5c42\u4e0e\u5c42\u4e4b\u95f4\u901a\u8fc7\u4ec0\u4e48\u8fb9\u754c\u5951\u7ea6\u901a\u4fe1\u3002<\/p>\n

\n

1. \u6838\u5fc3\u7ed3\u8bba\u5148\u884c<\/h3>\n

Android \u4e0d\u662f\u4e00\u4e2a"\u8dd1\u5728\u865a\u62df\u673a\u91cc\u7684\u8bed\u8a00\u8fd0\u884c\u65f6"，\u800c\u662f\u4e00\u4e2a\u57fa\u4e8e Linux \u5185\u6838\u6784\u5efa\u7684\u5206\u5c42\u64cd\u4f5c\u7cfb\u7edf\u3002\u5b83\u7684\u672c\u8d28\u662f：<\/p>\n

Linux Kernel（\u786c\u4ef6\u7ba1\u7406） \u2192 HAL（\u786c\u4ef6\u63a5\u53e3\u6807\u51c6\u5316） \u2192 Native Libraries + ART（\u539f\u751f\u80fd\u529b + \u5b57\u8282\u7801\u6267\u884c） \u2192 Java API Framework（\u7cfb\u7edf\u670d\u52a1\u66b4\u9732\u7ed9\u5e94\u7528\u7684\u63a5\u53e3） \u2192 Application Layer（\u5e94\u7528\u8fdb\u7a0b）<\/p>\n

\u6bcf\u4e00\u5c42\u53ea\u5411\u4e0a\u5c42\u63d0\u4f9b\u7ea6\u5b9a\u597d\u7684\u63a5\u53e3，\u5c42\u95f4\u8fb9\u754c\u6e05\u6670，\u66ff\u6362\u67d0\u4e00\u5c42\u7684\u5b9e\u73b0\u4e0d\u4f1a\u6ce2\u53ca\u4e0d\u76f8\u5173\u7684\u5c42\u2014\u2014\u8fd9\u5c31\u662f\u6574\u5ea7\u5927\u53a6\u7a33\u5b9a\u7684\u6839\u6e90\u3002<\/p>\n

\n

2. \u5168\u666f\u67b6\u6784\u56fe<\/h3>\n

2.1 \u4e94\u5c42\u7eb5\u5411\u67b6\u6784（\u5b98\u65b9\u7ecf\u5178\u6a21\u578b）<\/h4>\n

#mermaid-svg-qBqHQLUSoW9fyw3a{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-qBqHQLUSoW9fyw3a .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-qBqHQLUSoW9fyw3a .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-qBqHQLUSoW9fyw3a .error-icon{fill:#552222;}#mermaid-svg-qBqHQLUSoW9fyw3a .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-qBqHQLUSoW9fyw3a .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-qBqHQLUSoW9fyw3a .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-qBqHQLUSoW9fyw3a .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-qBqHQLUSoW9fyw3a .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-qBqHQLUSoW9fyw3a .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-qBqHQLUSoW9fyw3a .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-qBqHQLUSoW9fyw3a .marker{fill:#333333;stroke:#333333;}#mermaid-svg-qBqHQLUSoW9fyw3a .marker.cross{stroke:#333333;}#mermaid-svg-qBqHQLUSoW9fyw3a svg{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-qBqHQLUSoW9fyw3a p{margin:0;}#mermaid-svg-qBqHQLUSoW9fyw3a .label{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;color:#333;}#mermaid-svg-qBqHQLUSoW9fyw3a .cluster-label text{fill:#333;}#mermaid-svg-qBqHQLUSoW9fyw3a .cluster-label span{color:#333;}#mermaid-svg-qBqHQLUSoW9fyw3a .cluster-label span p{background-color:transparent;}#mermaid-svg-qBqHQLUSoW9fyw3a .label text,#mermaid-svg-qBqHQLUSoW9fyw3a span{fill:#333;color:#333;}#mermaid-svg-qBqHQLUSoW9fyw3a .node rect,#mermaid-svg-qBqHQLUSoW9fyw3a .node circle,#mermaid-svg-qBqHQLUSoW9fyw3a .node ellipse,#mermaid-svg-qBqHQLUSoW9fyw3a .node polygon,#mermaid-svg-qBqHQLUSoW9fyw3a .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-qBqHQLUSoW9fyw3a .rough-node .label text,#mermaid-svg-qBqHQLUSoW9fyw3a .node .label text,#mermaid-svg-qBqHQLUSoW9fyw3a .image-shape .label,#mermaid-svg-qBqHQLUSoW9fyw3a .icon-shape .label{text-anchor:middle;}#mermaid-svg-qBqHQLUSoW9fyw3a .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-qBqHQLUSoW9fyw3a .rough-node .label,#mermaid-svg-qBqHQLUSoW9fyw3a .node .label,#mermaid-svg-qBqHQLUSoW9fyw3a .image-shape .label,#mermaid-svg-qBqHQLUSoW9fyw3a .icon-shape .label{text-align:center;}#mermaid-svg-qBqHQLUSoW9fyw3a .node.clickable{cursor:pointer;}#mermaid-svg-qBqHQLUSoW9fyw3a .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-qBqHQLUSoW9fyw3a .arrowheadPath{fill:#333333;}#mermaid-svg-qBqHQLUSoW9fyw3a .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-qBqHQLUSoW9fyw3a .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-qBqHQLUSoW9fyw3a .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-qBqHQLUSoW9fyw3a .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-qBqHQLUSoW9fyw3a .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-qBqHQLUSoW9fyw3a .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-qBqHQLUSoW9fyw3a .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-qBqHQLUSoW9fyw3a .cluster text{fill:#333;}#mermaid-svg-qBqHQLUSoW9fyw3a .cluster span{color:#333;}#mermaid-svg-qBqHQLUSoW9fyw3a div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-qBqHQLUSoW9fyw3a .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-qBqHQLUSoW9fyw3a rect.text{fill:none;stroke-width:0;}#mermaid-svg-qBqHQLUSoW9fyw3a .icon-shape,#mermaid-svg-qBqHQLUSoW9fyw3a .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-qBqHQLUSoW9fyw3a .icon-shape p,#mermaid-svg-qBqHQLUSoW9fyw3a .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-qBqHQLUSoW9fyw3a .icon-shape .label rect,#mermaid-svg-qBqHQLUSoW9fyw3a .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-qBqHQLUSoW9fyw3a .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-qBqHQLUSoW9fyw3a .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-qBqHQLUSoW9fyw3a :root{–mermaid-font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;}<\/p>\n

\u8c03\u7528 Framework API<\/p>\n

<\/span><\/p>\n

JNI \u8c03\u7528 Native \u65b9\u6cd5<\/p>\n

<\/span><\/p>\n

HAL \u6807\u51c6\u63a5\u53e3 dlopen()<\/p>\n

<\/span><\/p>\n

syscall \/ ioctl \u7b49\u7cfb\u7edf\u8c03\u7528<\/p>\n

<\/span><\/p>\n

\u7b2c\u4e00\u5c42 \u00b7 Linux \u5185\u6838\u5c42 Linux Kernel<\/b>\u8fdb\u7a0b\u8c03\u5ea6 \u00b7 \u5185\u5b58\u7ba1\u7406 \u00b7 \u9a71\u52a8 \u00b7 IPC（Binder \/ epoll \/ socket）<\/p>\n

<\/span><\/span><\/span><\/p>\n

\u663e\u793a\u9a71\u52a8 \/ \u8f93\u5165\u9a71\u52a8 \/ \u5b58\u50a8\u9a71\u52a8 \/ \u7f51\u7edc\u8bbe\u5907\u9a71\u52a8<\/p>\n

<\/span><\/p>\n

Binder Driver<\/b>（\u5185\u6838\u7ea7 IPC）<\/p>\n

<\/span><\/p>\n

\u8fdb\u7a0b\u8c03\u5ea6 \/ \u5185\u5b58\u7ba1\u7406 \/ \u5b89\u5168（UID\/GID\/SELinux）<\/p>\n

<\/span><\/p>\n

\u7b2c\u4e8c\u5c42 \u00b7 \u786c\u4ef6\u62bd\u8c61\u5c42 HAL<\/b>\u6807\u51c6 C \u63a5\u53e3 .so \u6a21\u5757，\u5c4f\u853d\u786c\u4ef6\u5dee\u5f02<\/p>\n

<\/span><\/span><\/span><\/span><\/p>\n

camera.h \u2192 camera.xxx.so<\/p>\n

<\/span><\/p>\n

audio.h \u2192 audio.xxx.so<\/p>\n

<\/span><\/p>\n

sensors.h \u2192 sensors.xxx.so<\/p>\n

<\/span><\/p>\n

gralloc.h \/ hwcomposer.h<\/p>\n

<\/span><\/p>\n

\u7b2c\u4e09\u5c42 \u00b7 \u7cfb\u7edf\u8fd0\u884c\u5e93\u5c42 Native Libraries & Android Runtime<\/b>C\/C++ \u539f\u751f\u5e93 + ART \u865a\u62df\u673a\u8fd0\u884c\u65f6<\/p>\n

<\/span><\/span><\/span><\/p>\n

Native Libs（SQLite \/ OpenGL ES \/ WebKit \/ SSL \/ Media \/ Freetype\u2026）<\/p>\n

<\/span><\/p>\n

ART<\/b>DEX \u6267\u884c \u00b7 AOT\/JIT \u00b7 GC<\/p>\n

<\/span><\/p>\n

Bionic libc（Android \u5b9a\u5236 C \u5e93）<\/p>\n

<\/span><\/p>\n

\u7b2c\u56db\u5c42 \u00b7 Java API \u6846\u67b6\u5c42 Application Framework Layer<\/b>\u4ee5 Java\/Kotlin API \u5f62\u5f0f\u66b4\u9732\u7cfb\u7edf\u80fd\u529b<\/p>\n

<\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n

ActivityManagerService<\/p>\n

<\/span><\/p>\n

WindowManagerService<\/p>\n

<\/span><\/p>\n

PackageManagerService<\/p>\n

<\/span><\/p>\n

PowerManagerService<\/p>\n

<\/span><\/p>\n

NotificationManager<\/p>\n

<\/span><\/p>\n

ResourceManager<\/p>\n

<\/span><\/p>\n

\u7b2c\u4e94\u5c42 \u00b7 \u5e94\u7528\u5c42 Application Layer<\/b>\u6240\u6709\u5e94\u7528\u8fdb\u7a0b\u5728\u6b64\u8fd0\u884c，\u6bcf\u4e2a App \u4e00\u4e2a\u6c99\u7bb1\u8fdb\u7a0b<\/p>\n

<\/span><\/span><\/p>\n

\u7cfb\u7edf\u5e94\u7528（\u8bbe\u7f6e \/ \u7535\u8bdd \/ \u901a\u8baf\u5f55）<\/p>\n

<\/span><\/p>\n

\u7528\u6237\u5e94\u7528（\u7b2c\u4e09\u65b9）<\/p>\n

<\/span><\/p>\n

📌 \u8bfb\u6cd5：\u4ece\u4e0a\u5f80\u4e0b\u770b\u662f\u4f9d\u8d56\u65b9\u5411（App \u4f9d\u8d56 Framework，Framework \u4f9d\u8d56 Runtime+Native，Native \u901a\u8fc7 HAL \u627e\u786c\u4ef6，HAL \u843d\u5165 Kernel \u9a71\u52a8）\u3002\u4ece\u4e0b\u5f80\u4e0a\u770b\u662f\u652f\u6491\u65b9\u5411（Kernel \u628a\u786c\u4ef6\u80fd\u529b\u4e00\u5c42\u5c42\u62bd\u8c61\u51fa\u6765，\u6700\u7ec8\u53d8\u6210 App \u53ef\u8c03\u7528\u7684 getSystemService()）\u3002<\/p>\n

\n

2.2 \u5c42\u95f4\u8c03\u7528\u94fe\u8def \u2014\u2014 \u4e00\u6b21"\u83b7\u53d6\u6444\u50cf\u5934"\u7684\u5b8c\u6574\u7eb5\u5411\u7a7f\u8d8a\u6d41\u7a0b<\/h4>\n

\u4e0b\u9762\u8fd9\u6761\u6d41\u7a0b\u56fe\u63cf\u8ff0\u7684\u662f\u7cfb\u7edf\u5185\u90e8\u4e00\u6761\u5178\u578b\u7684\u7eb5\u5411\u8c03\u7528\u94fe，\u5e2e\u52a9\u4f60\u5efa\u7acb"\u5c42\u4e0e\u5c42\u600e\u4e48\u63a5\u8d77\u6765"\u7684\u7a7a\u95f4\u611f：<\/p>\n

#mermaid-svg-PJK2GWB5YCq3atJk{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-PJK2GWB5YCq3atJk .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-PJK2GWB5YCq3atJk .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-PJK2GWB5YCq3atJk .error-icon{fill:#552222;}#mermaid-svg-PJK2GWB5YCq3atJk .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-PJK2GWB5YCq3atJk .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-PJK2GWB5YCq3atJk .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-PJK2GWB5YCq3atJk .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-PJK2GWB5YCq3atJk .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-PJK2GWB5YCq3atJk .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-PJK2GWB5YCq3atJk .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-PJK2GWB5YCq3atJk .marker{fill:#333333;stroke:#333333;}#mermaid-svg-PJK2GWB5YCq3atJk .marker.cross{stroke:#333333;}#mermaid-svg-PJK2GWB5YCq3atJk svg{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-PJK2GWB5YCq3atJk p{margin:0;}#mermaid-svg-PJK2GWB5YCq3atJk .label{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;color:#333;}#mermaid-svg-PJK2GWB5YCq3atJk .cluster-label text{fill:#333;}#mermaid-svg-PJK2GWB5YCq3atJk .cluster-label span{color:#333;}#mermaid-svg-PJK2GWB5YCq3atJk .cluster-label span p{background-color:transparent;}#mermaid-svg-PJK2GWB5YCq3atJk .label text,#mermaid-svg-PJK2GWB5YCq3atJk span{fill:#333;color:#333;}#mermaid-svg-PJK2GWB5YCq3atJk .node rect,#mermaid-svg-PJK2GWB5YCq3atJk .node circle,#mermaid-svg-PJK2GWB5YCq3atJk .node ellipse,#mermaid-svg-PJK2GWB5YCq3atJk .node polygon,#mermaid-svg-PJK2GWB5YCq3atJk .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-PJK2GWB5YCq3atJk .rough-node .label text,#mermaid-svg-PJK2GWB5YCq3atJk .node .label text,#mermaid-svg-PJK2GWB5YCq3atJk .image-shape .label,#mermaid-svg-PJK2GWB5YCq3atJk .icon-shape .label{text-anchor:middle;}#mermaid-svg-PJK2GWB5YCq3atJk .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-PJK2GWB5YCq3atJk .rough-node .label,#mermaid-svg-PJK2GWB5YCq3atJk .node .label,#mermaid-svg-PJK2GWB5YCq3atJk .image-shape .label,#mermaid-svg-PJK2GWB5YCq3atJk .icon-shape .label{text-align:center;}#mermaid-svg-PJK2GWB5YCq3atJk .node.clickable{cursor:pointer;}#mermaid-svg-PJK2GWB5YCq3atJk .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-PJK2GWB5YCq3atJk .arrowheadPath{fill:#333333;}#mermaid-svg-PJK2GWB5YCq3atJk .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-PJK2GWB5YCq3atJk .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-PJK2GWB5YCq3atJk .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-PJK2GWB5YCq3atJk .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-PJK2GWB5YCq3atJk .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-PJK2GWB5YCq3atJk .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-PJK2GWB5YCq3atJk .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-PJK2GWB5YCq3atJk .cluster text{fill:#333;}#mermaid-svg-PJK2GWB5YCq3atJk .cluster span{color:#333;}#mermaid-svg-PJK2GWB5YCq3atJk div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-PJK2GWB5YCq3atJk .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-PJK2GWB5YCq3atJk rect.text{fill:none;stroke-width:0;}#mermaid-svg-PJK2GWB5YCq3atJk .icon-shape,#mermaid-svg-PJK2GWB5YCq3atJk .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-PJK2GWB5YCq3atJk .icon-shape p,#mermaid-svg-PJK2GWB5YCq3atJk .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-PJK2GWB5YCq3atJk .icon-shape .label rect,#mermaid-svg-PJK2GWB5YCq3atJk .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-PJK2GWB5YCq3atJk .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-PJK2GWB5YCq3atJk .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-PJK2GWB5YCq3atJk :root{–mermaid-font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;}<\/span><\/span><\/span><\/span><\/p>\n

\u2460 App \u8fdb\u7a0bCameraManager.openCamera<\/p>\n

<\/span><\/p>\n

\u2461 Framework \u5c42CameraService \u4ee3\u7406<\/p>\n

<\/span><\/p>\n

\u2462 Native \u5c42libcamera_client.so<\/p>\n

<\/span><\/p>\n

\u2463 HAL \u5c42camera.xxx.so<\/p>\n

<\/span><\/p>\n

\u2464 Kernel \u5c42Camera \u9a71\u52a8 \/ V4L2<\/p>\n

<\/span><\/p>\n

\u26a0\ufe0f \u8fd9\u91cc\u7684\u7bad\u5934\u4e0d\u662f\u8ba9\u4f60\u53bb\u5199\u8c03\u7528\u4ee3\u7801，\u800c\u662f\u6807\u6ce8\u6bcf\u4e00\u5c42\u7684\u8fb9\u754c\u5728\u54ea\u91cc：Framework \u4e0e Native \u7684\u8fb9\u754c\u662f JNI；Native \u4e0e HAL \u7684\u8fb9\u754c\u662f \u6807\u51c6 C \u7ed3\u6784\u4f53\u51fd\u6570\u8868（hw_module_t \/ hw_device_t）；HAL \u4e0e Kernel \u7684\u8fb9\u754c\u662f Unix \u7cfb\u7edf\u8c03\u7528\u63a5\u53e3\u3002<\/p>\n

\n

3. \u9010\u5c42\u89e3\u5256：\u6bcf\u4e00\u5c42\u5230\u5e95\u662f\u4ec0\u4e48<\/h3>\n
\n

\u7b2c\u4e00\u5c42 \u00b7 Linux \u5185\u6838\u5c42（Linux Kernel）<\/h4>\n

3.1 \u5b98\u65b9\u5b9a\u4e49<\/h5>\n

Android \u7684\u6700\u5e95\u5c42\u662f\u6807\u51c6\u7684 Linux \u5185\u6838（\u5386\u53f2\u7248\u672c\u57fa\u4e8e Linux \u957f\u671f\u652f\u6301\u5206\u652f LTS，\u5982 3.18 \/ 4.4 \/ 4.9 \/ 4.14 \/ 5.4 \/ 5.10 \u7b49，\u968f\u7248\u672c\u6f14\u8fdb）\u3002\u5b83\u4e0d\u662f"\u9b54\u6539\u5230\u8ba4\u4e0d\u51fa"\u7684 Linux，\u800c\u662f\u5728\u6807\u51c6\u5185\u6838\u57fa\u7840\u4e0a\u589e\u52a0\u4e86\u82e5\u5e72 Android \u7279\u6709\u7684\u5185\u6838\u7ec4\u4ef6：<\/p>\n\n\u5185\u6838\u7ec4\u4ef6\u4f5c\u7528<\/tr>\n\n\n\n\n\n\n
Binder Driver（\/dev\/binder）<\/td>\nAndroid \u72ec\u5360\u7684 IPC \u673a\u5236，\u5185\u6838\u7ea7\u9a71\u52a8，\u662f\u6240\u6709\u8de8\u8fdb\u7a0b\u901a\u4fe1\u7684\u9aa8\u5e72<\/td>\n<\/tr>\n
Ashmem（\u533f\u540d\u5171\u4eab\u5185\u5b58）<\/td>\n\u8de8\u8fdb\u7a0b\u5171\u4eab\u5927\u5757\u5185\u5b58\u7684\u539f\u8bed（\u65b0\u7248\u672c\u4e2d\u88ab memfd \u9010\u6b65\u66ff\u4ee3）<\/td>\n<\/tr>\n
Logger（\u5185\u6838\u65e5\u5fd7）<\/td>\nAndroid \u65e9\u671f\u5185\u6838\u65e5\u5fd7\u9a71\u52a8（\u73b0\u4ee3\u8f6c\u5411 logd \u7528\u6237\u6001\u5b9e\u73b0）<\/td>\n<\/tr>\n
wakelocks<\/td>\n\u7535\u6e90\u9501\u673a\u5236，\u9632\u6b62\u8bbe\u5907\u8fc7\u65e9\u4f11\u7720<\/td>\n<\/tr>\n
\u6807\u51c6 Linux \u5b50\u7cfb\u7edf<\/td>\n\u8fdb\u7a0b\u8c03\u5ea6（CFS）\u3001\u5185\u5b58\u7ba1\u7406（mmap \/ page cache）\u3001\u6587\u4ef6\u7cfb\u7edf（ext4 \/ f2fs）\u3001\u7f51\u7edc（netfilter \/ tcpip）\u3001\u8bbe\u5907\u9a71\u52a8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
3.2 \u4e3a\u4ec0\u4e48\u9009 Linux \u5185\u6838 \u2014\u2014 Google \u5b98\u65b9\u7ed9\u51fa\u7684\u7406\u7531<\/h5>\n

\u6839\u636e https:\/\/developer.android.google.cn\/guide\/platform：<\/p>\n

    \n
  • \u7ebf\u7a0b\u4e0e\u4f4e\u7ea7\u5185\u5b58\u7ba1\u7406：ART \u4f9d\u8d56\u5185\u6838\u7684 clone() \/ mmap() \/ pthread \u7b49\u539f\u8bed\u5b9e\u73b0\u8fdb\u7a0b\u548c\u7ebf\u7a0b\u6a21\u578b<\/li>\n
  • \u5b89\u5168\u6a21\u578b：\u6bcf\u4e2a App \u5bf9\u5e94\u4e00\u4e2a\u552f\u4e00\u7684 Linux UID\/GID，\u6587\u4ef6\u6743\u9650 + SELinux \u6784\u6210\u4e86\u6c99\u7bb1\u7684\u7b2c\u4e00\u9053\u9632\u7ebf<\/li>\n
  • \u9a71\u52a8\u751f\u6001：\u8bbe\u5907\u5382\u5546\u5df2\u6709\u6210\u719f\u7684 Linux \u9a71\u52a8\u5f00\u53d1\u8def\u5f84<\/li>\n<\/ul>\n
    3.3 \u5185\u6838\u5c42\u4ee3\u7801\u7247\u6bb5（\u793a\u610f：Binder \u9a71\u52a8\u5728\u5185\u6838\u4e2d\u7684\u5b58\u5728\u5f62\u6001）<\/h5>\n

    \/* drivers\/android\/binder.c \u2014\u2014 Linux \u5185\u6838\u6e90\u7801\u6811\u4e2d\u7684 Binder \u9a71\u52a8（\u793a\u610f\u6458\u5f55） *\/<\/span><\/p>\n

    \/\/ Binder \u8bbe\u5907\u5728 \/dev\/binder \u4e0a\u6ce8\u518c\u4e3a\u4e00\u4e2a misc \u5b57\u7b26\u8bbe\u5907<\/span>
    \nstatic<\/span> const<\/span> struct<\/span> file_operations<\/span> binder_fops =<\/span> {<\/span>
    \n .<\/span>owner =<\/span> THIS_MODULE,<\/span>
    \n .<\/span>poll =<\/span> binder_poll,<\/span> \/\/ epoll \u53ef\u8bfb\u4e8b\u4ef6<\/span>
    \n .<\/span>unlocked_ioctl =<\/span> binder_ioctl,<\/span> \/\/ ioctl \u547d\u4ee4\u5165\u53e3（BC_*\/BR_* \u534f\u8bae）<\/span>
    \n .<\/span>compat_ioctl =<\/span> binder_compat_ioctl,<\/span>
    \n .<\/span>mmap =<\/span> binder_mmap,<\/span> \/\/ \u6620\u5c04\u5185\u6838\u5171\u4eab\u5185\u5b58\u5230\u7528\u6237\u7a7a\u95f4<\/span>
    \n .<\/span>open =<\/span> binder_open,<\/span>
    \n .<\/span>release =<\/span> binder_release,<\/span>
    \n}<\/span>;<\/span><\/p>\n

    static<\/span> int<\/span> __init binder_init<\/span>(<\/span>void<\/span>)<\/span> {<\/span>
    \n \/\/ \u5411\u5185\u6838\u6ce8\u518c misc \u8bbe\u5907<\/span>
    \n misc_register<\/span>(<\/span>&<\/span>binder_miscdev)<\/span>;<\/span>
    \n return<\/span> 0<\/span>;<\/span>
    \n}<\/span><\/p>\n

    📖 \u4f60\u4e0d\u9700\u8981\u8bb0\u4f4f\u8fd9\u6bb5\u4ee3\u7801\u3002\u5173\u952e\u662f\u7406\u89e3：Binder \u4e0d\u662f\u4e00\u4e2a \u201cFramework \u5c42\u7684\u4e1c\u897f\u201d，\u5b83\u624e\u6839\u5728\u5185\u6838\u91cc，ioctl() \u662f\u5bf9\u5b83\u7684\u64cd\u4f5c\u547d\u4ee4\u901a\u9053\u3002<\/p>\n

    \n

    \u7b2c\u4e8c\u5c42 \u00b7 \u786c\u4ef6\u62bd\u8c61\u5c42（HAL \u2014 Hardware Abstraction Layer）<\/h4>\n

    3.1 HAL \u7684\u5b98\u65b9\u5b9a\u4e49\u4e0e\u5b58\u5728\u610f\u4e49<\/h5>\n

    HAL \u89e3\u51b3\u7684\u662f\u4e00\u4e2a\u5de5\u7a0b\u4e8b\u5b9e：Android \u8981\u8dd1\u5728\u6210\u767e\u4e0a\u5343\u79cd\u786c\u4ef6\u677f\u4e0a，\u6bcf\u79cd\u677f\u5b50\u7684\u6444\u50cf\u5934 IC\u3001\u97f3\u9891 codec\u3001\u4f20\u611f\u5668\u578b\u53f7\u90fd\u4e0d\u4e00\u6837\u2014\u2014\u5982\u679c Framework \u5c42\u76f4\u63a5\u8026\u5408\u5177\u4f53\u786c\u4ef6\u9a71\u52a8，Android \u5c31\u6210\u4e86\u4e00\u5768\u4e0d\u53ef\u79fb\u690d\u7684\u786c\u4ee3\u7801\u3002<\/p>\n

    HAL \u7684\u505a\u6cd5\u662f：<\/p>\n

    \u5b9a\u4e49\u4e00\u5957\u6807\u51c6 C \u8bed\u8a00\u63a5\u53e3（\u5934\u6587\u4ef6 .h）\u2192 \u5382\u5546\u63d0\u4f9b\u5bf9\u5e94\u7684\u52a8\u6001\u5e93\u5b9e\u73b0（.so）\u2192 Framework \u901a\u8fc7 dlopen() \u52a8\u6001\u52a0\u8f7d \u2192 \u53ea\u8c03\u7528\u63a5\u53e3\u51fd\u6570\u8868\u91cc\u7684\u6307\u9488，\u4e0d\u770b\u5e95\u5c42\u600e\u4e48\u5b9e\u73b0<\/p>\n

    3.2 HAL \u7684\u6838\u5fc3\u6570\u636e\u7ed3\u6784（\u6807\u51c6\u5951\u7ea6）<\/h5>\n

    \u6bcf\u4e00\u4e2a HAL \u6a21\u5757\u90fd\u9075\u5faa\u540c\u4e00\u4e2a\u51c6\u5165\u5951\u7ea6：<\/p>\n

    \/* hardware\/libhardware\/include\/hardware\/hardware.h \u2014\u2014 AOSP \u6e90\u7801 *\/<\/span><\/p>\n

    typedef<\/span> struct<\/span> hw_module_t<\/span> {<\/span>
    \n uint32_t<\/span> tag;<\/span> \/\/ \u5fc5\u987b\u4e3a HARDWARE_MODULE_TAG<\/span>
    \n uint16_t<\/span> module_api_version;<\/span>
    \n uint16_t<\/span> hal_api_version;<\/span>
    \n const<\/span> char<\/span> *<\/span>id;<\/span> \/\/ \u6a21\u5757\u6807\u8bc6："camera" \/ "sensors" \/ "lights" …<\/span>
    \n const<\/span> char<\/span> *<\/span>name;<\/span>
    \n const<\/span> char<\/span> *<\/span>author;<\/span>
    \n struct<\/span> hw_module_methods_t<\/span>*<\/span> methods;<\/span>
    \n \/\/ …<\/span>
    \n}<\/span> hw_module_t<\/span>;<\/span><\/p>\n

    typedef<\/span> struct<\/span> hw_module_methods_t<\/span> {<\/span>
    \n \/\/ \u6253\u5f00\u8bbe\u5907 \u2014\u2014 \u6240\u6709 HAL \u7684\u5165\u53e3\u90fd\u8d70\u8fd9\u4e2a\u51fd\u6570\u6307\u9488<\/span>
    \n int<\/span> (<\/span>*<\/span>open)<\/span>(<\/span>const<\/span> struct<\/span> hw_module_t<\/span>*<\/span> module,<\/span>
    \n const<\/span> char<\/span>*<\/span> id,<\/span>
    \n struct<\/span> hw_device_t<\/span>*<\/span>*<\/span> device)<\/span>;<\/span>
    \n}<\/span> hw_module_methods_t<\/span>;<\/span><\/p>\n

    typedef<\/span> struct<\/span> hw_device_t<\/span> {<\/span>
    \n uint32_t<\/span> tag;<\/span> \/\/ HARDWARE_DEVICE_TAG<\/span>
    \n uint32_t<\/span> version;<\/span>
    \n struct<\/span> hw_module_t<\/span>*<\/span> module;<\/span>
    \n \/\/ …<\/span>
    \n int<\/span> (<\/span>*<\/span>close)<\/span>(<\/span>struct<\/span> hw_device_t<\/span>*<\/span> device)<\/span>;<\/span>
    \n}<\/span> hw_device_t<\/span>;<\/span><\/p>\n

    \u800c\u5177\u4f53\u786c\u4ef6\u6a21\u5757\u4f1a\u5728\u6b64\u57fa\u7840\u4e0a"\u6d3e\u751f"：<\/p>\n

    \/* hardware\/libhardware\/include\/hardware\/camera.h *\/<\/span><\/p>\n

    typedef<\/span> struct<\/span> camera_module<\/span> {<\/span>
    \n hw_module_t<\/span> common;<\/span> \/\/ \u2190 \u5fc5\u987b\u7b2c\u4e00\u4e2a\u5b57\u6bb5，\u76f8\u5f53\u4e8e C \u98ce\u683c"\u7ee7\u627f"<\/span>
    \n \/\/ \u76f8\u673a\u7279\u6709\u6269\u5c55\u63a5\u53e3\u2026\u2026<\/span>
    \n}<\/span> camera_module_t<\/span>;<\/span><\/p>\n

    typedef<\/span> struct<\/span> camera_device<\/span> {<\/span>
    \n hw_device_t<\/span> common;<\/span> \/\/ \u2190 \u540c\u4e0a<\/span>
    \n camera_device_ops_t<\/span> *<\/span>ops;<\/span> \/\/ \u51fd\u6570\u8868：start_preview \/ take_picture \/ stop_preview \u2026<\/span>
    \n}<\/span> camera_device_t<\/span>;<\/span><\/p>\n

    3.3 HAL \u52a0\u8f7d\u673a\u5236（Framework \u5982\u4f55\u627e\u5230 .so）<\/h5>\n

    Framework \u4fa7\u7684 Native \u4ee3\u7801\u901a\u8fc7 hw_get_module() \u5b8c\u6210\u52a0\u8f7d：<\/p>\n

    \/\/ hardware\/libhardware\/hardware.c（AOSP \u7cbe\u7b80\u793a\u610f）<\/span>
    \nint<\/span> hw_get_module<\/span>(<\/span>const<\/span> char<\/span> *<\/span>id,<\/span> const<\/span> struct<\/span> hw_module_t<\/span> *<\/span>*<\/span>module)<\/span> {<\/span>
    \n \/\/ 1. \u62fc\u8def\u5f84：\/vendor\/lib\/hw\/<id>.<subarch>.so \u6216 \/system\/lib\/hw\/<id>.default.so<\/span>
    \n \/\/ 2. dlopen(path)<\/span>
    \n \/\/ 3. dlsym(handle, HAL_MODULE_INFO_SYM) \u2192 \u62ff\u5230 hw_module_t*<\/span>
    \n \/\/ 4. \u6821\u9a8c magic tag<\/span>
    \n \/\/ 5. \u8fd4\u56de module<\/span>
    \n}<\/span><\/p>\n

    \u8fd9\u5c31\u662f HAL \u7684\u5168\u90e8\u9b54\u6cd5：\u4e00\u4e2a\u7ea6\u5b9a\u597d\u7684 hw_module_t \u7ed3\u6784\u4f53 + dlopen() \u52a8\u6001\u94fe\u63a5 + \u51fd\u6570\u6307\u9488\u8868\u3002\u6ca1\u6709\u53cd\u5c04\u3001\u6ca1\u6709\u6ce8\u89e3\u3001\u6ca1\u6709\u6846\u67b6\u2014\u2014\u5c31\u662f C \u8bed\u8a00\u7684\u7ecf\u5178\u624b\u6cd5\u3002<\/p>\n

    \n

    \u7b2c\u4e09\u5c42 \u00b7 \u7cfb\u7edf\u8fd0\u884c\u5e93\u5c42（Native Libraries & Android Runtime）<\/h4>\n

    \u8fd9\u4e00\u5c42\u5176\u5b9e\u5305\u542b \u4e24\u6761\u5e73\u884c\u8f68\u9053：<\/p>\n

    \u8f68\u9053 A：\u539f\u751f C\/C++ \u5e93（Native Libraries）<\/h5>\n

    \u8fd9\u4e9b\u662f\u4e0d\u5e26\u865a\u62df\u673a\u8272\u5f69\u7684\u7eaf\u539f\u751f\u80fd\u529b，\u7531 C\/C++ \u7f16\u8bd1\u800c\u6765：<\/p>\n\n\u5e93\u804c\u8d23<\/tr>\n\n\n\n\n\n\n\n\n
    libc（Bionic）<\/td>\nAndroid \u81ea\u7814 C \u6807\u51c6\u5e93（\u975e glibc），\u8f7b\u91cf\u3001\u4e13\u4e3a\u5d4c\u5165\u5f0f\u8c03\u4f18<\/td>\n<\/tr>\n
    libsqlite.so<\/td>\nSQLite \u5f15\u64ce\u672c\u4f53<\/td>\n<\/tr>\n
    libGLESv2.so \/ libEGL.so<\/td>\nOpenGL ES \u56fe\u5f62\u6e32\u67d3<\/td>\n<\/tr>\n
    libmedia.so \/ libstagefright.so<\/td>\n\u97f3\u89c6\u9891\u7f16\u89e3\u7801\u7ba1\u7ebf<\/td>\n<\/tr>\n
    libssl.so \/ libcrypto.so<\/td>\nTLS \/ \u52a0\u5bc6<\/td>\n<\/tr>\n
    libgui.so<\/td>\nSurfaceFlinger \u5ba2\u6237\u7aef\u63a5\u53e3（BufferQueue \u7b49）<\/td>\n<\/tr>\n
    libbinder.so<\/td>\nBinder \u7684\u7528\u6237\u6001\u5e93\u5c01\u88c5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \u8f68\u9053 B：Android Runtime（ART）<\/h5>\n

    ART \u662f Android \u5e94\u7528\u7684\u6267\u884c\u5f15\u64ce\u3002\u5b83\u7684\u6838\u5fc3\u4efb\u52a1\u662f：<\/p>\n

  • \u8bfb\u53d6 .dex \/ .oat \u683c\u5f0f\u7684\u5b57\u8282\u7801<\/li>\n
  • \u7ffb\u8bd1\u6210（\u6216\u89e3\u91ca\u6267\u884c）\u673a\u5668\u6307\u4ee4<\/li>\n
  • \u7ba1\u7406\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f（Garbage Collector）<\/li>\n
  • \u63d0\u4f9b Java \u6838\u5fc3\u5e93\u7684 Native \u5b9e\u73b0（\u901a\u8fc7 JNI \u6865\u5230 libcore）<\/li>\n

    \u5173\u952e\u6587\u4ef6\u5f62\u6001：<\/p>\n

    classes.dex \u2190 Dalvik Executable，\u591a .class \u5408\u5e76\u4f18\u5316\u540e\u7684\u5b57\u8282\u7801
    \n.oat (ELF) \u2190 ART AOT \u7f16\u8bd1\u4ea7\u7269，\u9884\u7f16\u8bd1\u4e3a\u672c\u5730\u673a\u5668\u7801
    \n.vdex \u2190 \u9a8c\u8bc1\u8fc7\u7684 DEX \u7f13\u5b58，\u52a0\u901f\u540e\u7eed\u7f16\u8bd1<\/p>\n

    ART \u7684\u4e24\u79cd\u7f16\u8bd1\u7b56\u7565（\u5b98\u65b9\u5b9a\u4e49）：<\/p>\n\n\u7b56\u7565\u8bf4\u660e<\/tr>\n\n\n\n
    AOT（Ahead-of-Time）<\/td>\n\u5b89\u88c5\/OTA \u65f6\u5c06 DEX \u7f16\u8bd1\u4e3a\u673a\u5668\u7801（.oat），\u8fd0\u884c\u65f6\u76f4\u63a5\u6267\u884c，\u542f\u52a8\u5feb<\/td>\n<\/tr>\n
    JIT（Just-In-Time）<\/td>\n\u8fd0\u884c\u65f6\u6839\u636e\u70ed\u8def\u5f84\u5bf9 DEX \u505a\u5373\u65f6\u7f16\u8bd1\u5e76\u7f13\u5b58 profile，\u5e73\u8861\u9996\u6b21\u5b89\u88c5\u901f\u5ea6\u4e0e\u957f\u671f\u6027\u80fd<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Android 5.0 ~ 7.x：\u4ee5 AOT \u4e3a\u4e3b（\u5b89\u88c5\u5373\u5168\u91cf\u7f16\u8bd1，dex2oat）
    \nAndroid 7.0+（N \u53ca\u4ee5\u540e）：\u6df7\u5408\u6a21\u5f0f\u2014\u2014\u5b89\u88c5\u65f6\u505a\u8f7b\u91cf\u9a8c\u8bc1，\u8fd0\u884c\u65f6 JIT + profile-guided \u540e\u53f0 AOT<\/p>\n

    ART \u4e0e Linux Kernel \u7684\u5173\u7cfb<\/h6>\n

    ART \u4f9d\u8d56 Linux \u5185\u6838\u5b9e\u73b0\u7ebf\u7a0b\u521b\u5efa（clone）\u3001\u5185\u5b58\u6620\u5c04（mmap）\u3001\u6587\u4ef6 I\/O \u548c \u7ebf\u7a0b\u540c\u6b65\u539f\u8bed（futex）\u2014\u2014\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6587\u6863\u91cc\u5199 \u201cART depends on the Linux kernel for underlying functionality such as thread and low-level memory management\u201d\u3002<\/p>\n

    \n

    \u7b2c\u56db\u5c42 \u00b7 Java API \u6846\u67b6\u5c42（Application Framework Layer）<\/h4>\n

    3.1 \u5b83\u662f\u4ec0\u4e48<\/h5>\n

    \u8fd9\u662f\u5927\u591a\u6570\u4eba\u6240\u7406\u89e3\u7684"Android API"\u6240\u5728\u7684\u5730\u65b9\u2014\u2014\u4f46\u5b83\u672c\u8d28\u4e0a\u53ea\u662f \u5bf9\u4e0b\u5c42\u80fd\u529b\u7684 Java \u5c01\u88c5 + \u7cfb\u7edf\u670d\u52a1\u7684\u7ba1\u5bb6\u3002<\/p>\n

    \u6846\u67b6\u5c42\u4e0d\u662f\u4e00\u5757\u94c1\u677f，\u5b83\u7531\u4e00\u7cfb\u5217\u5e38\u9a7b\u7684\u7cfb\u7edf\u670d\u52a1（System Services）\u548c\u4f9b App \u8c03\u7528\u7684\u516c\u5f00 API \u7c7b\u7ec4\u6210\u3002\u8fd9\u4e9b\u7cfb\u7edf\u670d\u52a1\u4e0d\u8fd0\u884c\u5728\u4f60\u7684 App \u8fdb\u7a0b\u91cc，\u800c\u662f\u8fd0\u884c\u5728\u4e00\u4e2a\u53eb system_server \u7684\u7279\u6b8a\u7cfb\u7edf\u8fdb\u7a0b\u91cc\u3002<\/p>\n\n\u6846\u67b6\u7ec4\u4ef6（Java \u7c7b\u540d）\u80cc\u540e\u5bf9\u5e94\u7684\u7cfb\u7edf\u670d\u52a1\u7ba1\u4ec0\u4e48\u4e8b<\/tr>\n\n\n\n\n\n\n\n\n
    ActivityManager<\/td>\nActivityManagerService (AMS)<\/td>\n\u56db\u5927\u7ec4\u4ef6\u751f\u547d\u5468\u671f\u8c03\u5ea6\u3001\u8fdb\u7a0b\u7ba1\u7406<\/td>\n<\/tr>\n
    WindowManager<\/td>\nWindowManagerService (WMS)<\/td>\n\u7a97\u53e3\u5c42\u7ea7\u3001Surface \u7ba1\u7406<\/td>\n<\/tr>\n
    PackageManager<\/td>\nPackageManagerService (PMS)<\/td>\n\u5305\u5b89\u88c5\/\u89e3\u6790\/\u6743\u9650\/\u7ec4\u4ef6\u4fe1\u606f\u67e5\u8be2<\/td>\n<\/tr>\n
    InputManager<\/td>\nInputManagerService (IMS)<\/td>\n\u8f93\u5165\u4e8b\u4ef6\u91c7\u96c6\u4e0e\u5206\u53d1<\/td>\n<\/tr>\n
    NotificationManager<\/td>\nNotificationManagerService (NMS)<\/td>\n\u901a\u77e5\u6761\u7ba1\u7406<\/td>\n<\/tr>\n
    PowerManager<\/td>\nPowerManagerService<\/td>\n\u5524\u9192\u9501\u3001\u4f11\u7720\u7b56\u7565<\/td>\n<\/tr>\n
    ConnectivityManager<\/td>\nConnectivityService<\/td>\n\u7f51\u7edc\u8fde\u63a5\u72b6\u6001<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    3.2 \u6846\u67b6\u5c42\u7684\u5173\u952e\u8bbe\u8ba1：Binder IPC \u628a App \u548c system_server \u8fde\u8d77\u6765<\/h5>\n

    \u5f53\u4f60\u8c03\u7528 context.getSystemService(Context.ACTIVITY_SERVICE) \u62ff\u5230\u7684\u5e76\u4e0d\u662f AMS \u672c\u4f53，\u800c\u662f\u4e00\u4e2aBinder Proxy\u2014\u2014\u5b83\u901a\u8fc7 \/dev\/binder \u628a\u8bf7\u6c42\u53d1\u5230 system_server \u8fdb\u7a0b\u4e2d\u771f\u6b63\u7684 AMS \u53bb\u6267\u884c：<\/p>\n

    \/\/ android.app.ActivityManager \u2014\u2014 \u6846\u67b6\u5c42\u516c\u5f00 API（\u7cbe\u7b80\u793a\u610f）<\/span>
    \npublic<\/span> class<\/span> ActivityManager<\/span> {<\/span>
    \n public<\/span> static<\/span> IActivityManager<\/span> getService<\/span>(<\/span>)<\/span> {<\/span>
    \n \/\/ \u62ff\u5230 Binder Proxy \u2192 \u901a\u8fc7 transact() \u53d1\u5f80 system_server<\/span>
    \n return<\/span> IActivityManagerStub<\/span>.<\/span>asInterface<\/span>(<\/span>
    \n ServiceManager<\/span>.<\/span>getService<\/span>(<\/span>Context<\/span>.<\/span>ACTIVITY_SERVICE<\/span>)<\/span>
    \n )<\/span>;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \/\/ App \u4fa7\u8c03\u7528（\u7eaf\u5b66\u672f\u8bed\u5883\u4e0b\u7684\u8c03\u7528\u5173\u7cfb）：<\/span>
    \n\/\/ ActivityManager.getService().startActivity(…) <\/span>
    \n\/\/ \u2192 Binder IPC \u7a7f\u8fc7\u8fdb\u7a0b\u8fb9\u754c<\/span>
    \n\/\/ \u2192 system_server \u5185 ActivityManagerService \u6536\u5230\u8bf7\u6c42 \u2192 \u8c03\u5ea6\u771f\u5b9e\u903b\u8f91<\/span><\/p>\n

    🔑 \u8fd9\u53e5\u662f\u6574\u7bc7\u6700\u91cd\u8981\u7684\u8ba4\u77e5\u951a\u70b9\u4e4b\u4e00：Framework \u5c42\u7684\u5927\u90e8\u5206"Manager"\u7c7b\u4e0d\u76f4\u63a5\u505a\u4e8b，\u5b83\u4eec\u53ea\u662f Binder \u5ba2\u6237\u7aef\u7684\u95e8\u9762（Facade）\u3002\u771f\u6b63\u5e72\u6d3b\u7684\u4eba\u5728\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u3002<\/p>\n

    \n

    \u7b2c\u4e94\u5c42 \u00b7 \u5e94\u7528\u5c42（Application Layer）<\/h4>\n

    3.1 \u5b98\u65b9\u5b9a\u4e49<\/h5>\n

    \u5e94\u7528\u5c42\u5305\u542b：<\/p>\n

      \n
    • \u7cfb\u7edf\u5e94\u7528：\u968f ROM \u5185\u7f6e（\/system\/app\/ \u6216 \/system\/priv-app\/），\u5982 \u8bbe\u7f6e\u3001Launcher\u3001\u7535\u8bdd<\/li>\n
    • \u7528\u6237\u5e94\u7528：\u5b89\u88c5\u5230 \/data\/app\/，\u5373\u4f60\u4ece\u5e94\u7528\u5546\u5e97\u88c5\u7684\u7b2c\u4e09\u65b9 App<\/li>\n<\/ul>\n

      \u7cfb\u7edf\u5e94\u7528\u548c\u7b2c\u4e09\u65b9\u5e94\u7528\u8fd0\u884c\u5728\u540c\u4e00\u4e2a\u89c4\u5219\u4f53\u7cfb\u4e0b：\u5b83\u4eec\u90fd\u7528\u540c\u6837\u7684 Framework API\u3001\u540c\u6837\u7684\u56db\u5927\u7ec4\u4ef6\u6a21\u578b\u3001\u540c\u6837\u7684\u6c99\u7bb1\u9694\u79bb（\u6bcf\u4e2a App \u4e00\u4e2a UID，\u5404\u81ea\u7684\u6570\u636e\u76ee\u5f55\u5f52\u5404\u81ea\u6240\u6709）\u3002\u533a\u522b\u53ea\u5728\u7b7e\u540d\u6743\u9650\u548cpriv-app \u8def\u5f84\u5e26\u6765\u7684 elevated permission \u5c42\u7ea7\u3002<\/p>\n

      3.2 \u5e94\u7528\u8fdb\u7a0b\u4ece\u54ea\u6765<\/h5>\n

      \u6240\u6709 Android \u5e94\u7528\u8fdb\u7a0b\u90fd\u4e0d\u662f\u4f60"\u624b\u52a8 fork"\u51fa\u6765\u7684，\u800c\u662f\u7531 Zygote \u8fdb\u7a0b（\u5728 init \u9636\u6bb5\u542f\u52a8\u7684\u4e00\u4e2a\u7279\u6b8a\u6839\u8fdb\u7a0b）fork \u51fa\u6765\u7684\u3002Zygote \u9884\u5148\u52a0\u8f7d\u4e86 Framework \u7684\u6838\u5fc3\u7c7b\u548c\u8d44\u6e90，\u5b50\u8fdb\u7a0b\u901a\u8fc7 copy-on-write \u7ee7\u627f\u8fd9\u4efd\u5df2\u521d\u59cb\u5316\u7684\u5806，\u4ece\u800c\u5927\u5e45\u52a0\u901f\u5e94\u7528\u542f\u52a8\u3002<\/p>\n

      （\u8fd9\u4e00\u70b9\u5728\u540e\u7eed\u300a\u7b2c\u56db\u7bc7：\u8fdb\u7a0b\u5b75\u5316 Zygote \u4e0e Low Memory Killer\u300b\u4e2d\u4f1a\u5c55\u5f00\u8bb2\u3002）<\/p>\n

      \n

      4. \u4e24\u5f20\u6a2a\u5411\u5bf9\u6bd4\u8868 \u2014\u2014 \u5c42\u4e0e\u5c42\u7684\u5173\u7cfb<\/h3>\n

      4.1 \u6bcf\u5c42\u7528\u4ec0\u4e48\u8bed\u8a00\/\u4ec0\u4e48\u5f62\u6001\u5b58\u5728<\/h4>\n\n\u5c42\u8bed\u8a00\/\u5f62\u6001\u5b58\u5728\u5f62\u5f0f\u8c01\u7528\u5b83<\/tr>\n\n\n\n\n\n\n
      Linux Kernel<\/td>\nC（\u5c11\u91cf\u6c47\u7f16）<\/td>\nvmlinux + ko \u9a71\u52a8\u6a21\u5757<\/td>\nHAL\u3001\u7528\u6237\u6001 libc<\/td>\n<\/tr>\n
      HAL<\/td>\nC \u63a5\u53e3 + .so<\/td>\n\/vendor\/lib\/hw\/*.so<\/td>\nNative Libs（\u901a\u8fc7 dlopen）<\/td>\n<\/tr>\n
      Native Libraries & ART<\/td>\nC\/C++（\u90e8\u5206\u6c47\u7f16）<\/td>\n.so + \u53ef\u6267\u884c\u6587\u4ef6（app_process\u3001dex2oat）<\/td>\nFramework（JNI \u8c03\u7528） \/ \u81ea\u8eab\u4e92\u8c03<\/td>\n<\/tr>\n
      Java API Framework<\/td>\nJava<\/td>\nframework.jar + services.jar<\/td>\nApp \u8fdb\u7a0b（Binder IPC \u5230 system_server）<\/td>\n<\/tr>\n
      Application Layer<\/td>\nJava\/Kotlin \u5b57\u8282\u7801（DEX）<\/td>\nAPK \u5185\u7684 classes.dex<\/td>\n\u2014（\u9876\u5c42，\u88ab\u7528\u6237\u89e6\u53d1）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      4.2 \u5c42\u95f4\u8fb9\u754c\u2014\u2014\u9760\u4ec0\u4e48\u8de8\u8d8a<\/h4>\n\n\u8fb9\u754c\u8de8\u8d8a\u673a\u5236\u65b9\u5411<\/tr>\n\n\n\n\n\n\n
      Framework \u2194 Native<\/td>\nJNI（Java Native Interface）<\/td>\n\u53cc\u5411<\/td>\n<\/tr>\n
      Native \u2194 HAL<\/td>\ndlopen() + \u6807\u51c6 C \u51fd\u6570\u6307\u9488\u8868（hw_module_t）<\/td>\nNative \u2192 HAL<\/td>\n<\/tr>\n
      HAL \u2194 Kernel<\/td>\n\u7cfb\u7edf\u8c03\u7528（ioctl \/ read \/ write \/ mmap \/ poll）<\/td>\nHAL \u2192 Kernel<\/td>\n<\/tr>\n
      App\u8fdb\u7a0b \u2194 system_server<\/td>\nBinder IPC（\/dev\/binder）<\/td>\n\u53cc\u5411<\/td>\n<\/tr>\n
      App\u8fdb\u7a0b \u2194 App\u8fdb\u7a0b<\/td>\nBinder \/ Intent（\u5e95\u5c42\u4ecd\u662f Binder）<\/td>\n\u53d7\u6743\u9650\u7ea6\u675f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n

      5. \u4e00\u4e2a\u5b8c\u6574\u7684\u5c0f\u578b\u601d\u7ef4\u5b9e\u9a8c：\u6309\u4e0b App \u56fe\u6807\u540e，\u7cfb\u7edf\u5185\u90e8\u7ecf\u8fc7\u4e86\u54ea\u4e9b\u5c42<\/h3>\n

      #mermaid-svg-83eht9gC0DMFY7ca{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-83eht9gC0DMFY7ca .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-83eht9gC0DMFY7ca .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-83eht9gC0DMFY7ca .error-icon{fill:#552222;}#mermaid-svg-83eht9gC0DMFY7ca .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-83eht9gC0DMFY7ca .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-83eht9gC0DMFY7ca .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-83eht9gC0DMFY7ca .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-83eht9gC0DMFY7ca .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-83eht9gC0DMFY7ca .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-83eht9gC0DMFY7ca .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-83eht9gC0DMFY7ca .marker{fill:#333333;stroke:#333333;}#mermaid-svg-83eht9gC0DMFY7ca .marker.cross{stroke:#333333;}#mermaid-svg-83eht9gC0DMFY7ca svg{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-83eht9gC0DMFY7ca p{margin:0;}#mermaid-svg-83eht9gC0DMFY7ca .label{font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;color:#333;}#mermaid-svg-83eht9gC0DMFY7ca .cluster-label text{fill:#333;}#mermaid-svg-83eht9gC0DMFY7ca .cluster-label span{color:#333;}#mermaid-svg-83eht9gC0DMFY7ca .cluster-label span p{background-color:transparent;}#mermaid-svg-83eht9gC0DMFY7ca .label text,#mermaid-svg-83eht9gC0DMFY7ca span{fill:#333;color:#333;}#mermaid-svg-83eht9gC0DMFY7ca .node rect,#mermaid-svg-83eht9gC0DMFY7ca .node circle,#mermaid-svg-83eht9gC0DMFY7ca .node ellipse,#mermaid-svg-83eht9gC0DMFY7ca .node polygon,#mermaid-svg-83eht9gC0DMFY7ca .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-83eht9gC0DMFY7ca .rough-node .label text,#mermaid-svg-83eht9gC0DMFY7ca .node .label text,#mermaid-svg-83eht9gC0DMFY7ca .image-shape .label,#mermaid-svg-83eht9gC0DMFY7ca .icon-shape .label{text-anchor:middle;}#mermaid-svg-83eht9gC0DMFY7ca .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-83eht9gC0DMFY7ca .rough-node .label,#mermaid-svg-83eht9gC0DMFY7ca .node .label,#mermaid-svg-83eht9gC0DMFY7ca .image-shape .label,#mermaid-svg-83eht9gC0DMFY7ca .icon-shape .label{text-align:center;}#mermaid-svg-83eht9gC0DMFY7ca .node.clickable{cursor:pointer;}#mermaid-svg-83eht9gC0DMFY7ca .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-83eht9gC0DMFY7ca .arrowheadPath{fill:#333333;}#mermaid-svg-83eht9gC0DMFY7ca .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-83eht9gC0DMFY7ca .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-83eht9gC0DMFY7ca .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-83eht9gC0DMFY7ca .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-83eht9gC0DMFY7ca .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-83eht9gC0DMFY7ca .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-83eht9gC0DMFY7ca .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-83eht9gC0DMFY7ca .cluster text{fill:#333;}#mermaid-svg-83eht9gC0DMFY7ca .cluster span{color:#333;}#mermaid-svg-83eht9gC0DMFY7ca div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-83eht9gC0DMFY7ca .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-83eht9gC0DMFY7ca rect.text{fill:none;stroke-width:0;}#mermaid-svg-83eht9gC0DMFY7ca .icon-shape,#mermaid-svg-83eht9gC0DMFY7ca .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-83eht9gC0DMFY7ca .icon-shape p,#mermaid-svg-83eht9gC0DMFY7ca .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-83eht9gC0DMFY7ca .icon-shape .label rect,#mermaid-svg-83eht9gC0DMFY7ca .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-83eht9gC0DMFY7ca .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-83eht9gC0DMFY7ca .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-83eht9gC0DMFY7ca :root{–mermaid-font-family:\\”trebuchet ms\\”,verdana,arial,sans-serif;}<\/p>\n

      Launcher \u8c03\u7528startActivity(Intent)<\/p>\n

      <\/span><\/p>\n

      Binder IPC \u7a7f\u8fdb\u7a0b\u2192 system_server<\/p>\n

      <\/span><\/p>\n

      PMS \u89e3\u6790 intent \/ \u67e5 ResolveInfo\u786e\u8ba4\u76ee\u6807\u5305\u540d + Activity<\/p>\n

      <\/span><\/p>\n

      \u82e5\u76ee\u6807\u8fdb\u7a0b\u672a\u5b58\u6d3b \u2192\u901a\u77e5 Zygote fork \u65b0\u8fdb\u7a0b<\/p>\n

      <\/span><\/p>\n

      \u65b0\u8fdb\u7a0b\u8fdb\u5165:ActivityThread.main()Looper \u542f\u52a8 \u2192 Binder \u7ebf\u7a0b\u6c60\u521d\u59cb\u5316<\/p>\n

      <\/span><\/p>\n

      AMS \u8c03\u5ea6:\u8c03\u7528 scheduleLaunchActivity\u2192 Binder \u56de\u5230 App \u8fdb\u7a0b<\/p>\n

      <\/span><\/p>\n

      \u7528\u6237\u5728 Launcher（\u4e5f\u662f\u4e00\u4e2a App）\u70b9\u51fb\u56fe\u6807<\/p>\n

      <\/span><\/p>\n

      Framework \u5c42ActivityManager.getService()<\/p>\n

      <\/span><\/p>\n

      ActivityManagerService（system_server \u5185）<\/p>\n

      <\/span><\/p>\n

      PackageManagerService<\/p>\n

      <\/span><\/p>\n

      Zygote \u2192 fork() \u2192 \u65b0 App \u8fdb\u7a0b<\/p>\n

      <\/span><\/p>\n

      App \u8fdb\u7a0b\u521d\u59cb\u5316<\/p>\n

      <\/span><\/p>\n

      Activity \u5b9e\u4f8b\u521b\u5efa\u2192 onCreate \u2192 setContentView\u2192 onResume<\/p>\n

      <\/span><\/p>\n

      \u6bcf\u4e00\u4e2a\u7bad\u5934\u90fd\u6709\u636e\u53ef\u67e5，\u5bf9\u5e94 AOSP \u91cc\u771f\u5b9e\u7684\u7c7b\u548c\u65b9\u6cd5\u8c03\u7528\u94fe\u3002\u4f60\u73b0\u5728\u4e0d\u9700\u8981\u80cc\u4e0b\u6765，\u4f46\u8981\u8bb0\u4f4f\u5b83\u7684\u5f62\u72b6：App \u2192 Binder \u2192 system_server \u2192 Zygote \u2192 \u65b0 App \u8fdb\u7a0b \u2192 \u56de\u5230 App\u3002\u8fd9\u5c31\u662f Android \u7684\u8fd0\u884c\u54f2\u5b66\u2014\u2014\u4e00\u5207\u5173\u952e\u8c03\u5ea6\u90fd\u8de8\u8fdb\u7a0b，\u4e00\u5207\u8de8\u8fdb\u7a0b\u90fd\u8d70 Binder\u3002<\/p>\n

      \n

      6. AOSP \u6e90\u7801\u4ed3\u5e93\u7ed3\u6784\u901f\u89c8（\u5b66\u672f\u5bfc\u822a）<\/h3>\n

      \u77e5\u9053\u67b6\u6784\u56fe\u8fd8\u4e0d\u591f，\u4f60\u5f97\u77e5\u9053\u53bb\u54ea\u91cc\u770b\u6e90\u7801\u5370\u8bc1\u3002AOSP \u7684\u4ee3\u7801\u7ec4\u7ec7\u7ed3\u6784\u672c\u8eab\u5c31\u53cd\u6620\u4e86\u5206\u5c42：<\/p>\n

      AOSP\/
      \n\u251c\u2500\u2500 kernel\/ # \u2460 Linux \u5185\u6838（\u6709\u65f6\u5355\u72ec repo）
      \n\u251c\u2500\u2500 hardware\/libhardware\/ # \u2461 HAL \u5934\u6587\u4ef6 + \u52a0\u8f7d\u903b\u8f91（hw_module_t \u7b49）
      \n\u2502 \u2514\u2500\u2500 include\/hardware\/
      \n\u251c\u2500\u2500 hardware\/qcom\/ # \u2461 \u5382\u5546 HAL .so \u5b9e\u73b0（\u9ad8\u901a\u4f8b）
      \n\u251c\u2500\u2500 bionic\/ # \u2462 Bionic libc（C \u8fd0\u884c\u5e93）
      \n\u251c\u2500\u2500 external\/sqlite\/ # \u2462 \u539f\u751f\u7b2c\u4e09\u65b9\u5e93（SQLite \/ openssl \/ \u2026）
      \n\u251c\u2500\u2500 frameworks\/native\/ # \u2462 Native \u4fa7：libgui \/ libbinder \/ inputflinger
      \n\u251c\u2500\u2500 frameworks\/base\/ # \u2463 Java \u6846\u67b6\u5c42：
      \n\u2502 \u251c\u2500\u2500 core\/java\/android\/ # \u516c\u5f00 API（android.* \u5305）
      \n\u2502 \u251c\u2500\u2500 services\/ # system_server \u91cc\u7684\u5404 Service
      \n\u2502 \u2514\u2500\u2500 cmds\/am\/ # am \u547d\u4ee4\u7b49
      \n\u251c\u2500\u2500 art\/ # \u2462 ART \u865a\u62df\u673a\u672c\u4f53
      \n\u251c\u2500\u2500 packages\/apps\/Settings\/ # \u2464 \u7cfb\u7edf\u5e94\u7528（\u8bbe\u7f6e）
      \n\u251c\u2500\u2500 packages\/apps\/Launcher3\/ # \u2464 \u7cfb\u7edf\u5e94\u7528（\u684c\u9762）
      \n\u2514\u2500\u2500 build\/ # \u7f16\u8bd1\u4f53\u7cfb（Soong \/ Blueprint \/ envsetup.sh）<\/p>\n

      📌 \u5b66\u672f\u9605\u8bfb\u987a\u5e8f\u5efa\u8bae：\u4ece frameworks\/base\/core\/java\/android\/ \u770b Framework API \u957f\u4ec0\u4e48\u6837 \u2192 \u987a\u7740 JNI \u8df3\u5230 frameworks\/native\/ \u548c art\/ \u2192 \u987a\u7740 HAL \u63a5\u53e3\u770b hardware\/libhardware\/ \u2192 \u843d\u5230\u9a71\u52a8\u770b kernel\/\u3002<\/p>\n

      \n

      7. \u672c\u7bc7\u603b\u7ed3（\u77e5\u8bc6\u95ed\u73af）<\/h3>\n\n\u4f60\u8981\u5e26\u8d70\u7684\u8ba4\u77e5\u4e00\u53e5\u8bdd<\/tr>\n\n\n\n\n\n\n
      Android \u662f Linux<\/td>\n\u5185\u6838\u5c42\u5e72\u8fdb\u7a0b\u3001\u5185\u5b58\u3001\u9a71\u52a8\u3001IPC \u7684\u810f\u6d3b\u7d2f\u6d3b<\/td>\n<\/tr>\n
      \u786c\u4ef6\u5dee\u5f02\u88ab HAL \u5403\u6389<\/td>\n\u5382\u5546\u5199 .so，Framework \u7528 dlopen() + \u51fd\u6570\u6307\u9488\u8c03\u5b83\u2014\u2014\u4e0d\u6c61\u67d3\u4e0a\u5c42<\/td>\n<\/tr>\n
      \u5e94\u7528\u4e0d\u76f4\u63a5\u78b0\u7cfb\u7edf<\/td>\nApp \u8c03\u7684 Manager \u7c7b\u5927\u591a\u662f Binder Proxy，\u771f\u6d3b\u513f\u5728 system_server<\/td>\n<\/tr>\n
      \u6bcf\u4e2a App \u662f\u4e00\u4e2a\u6c99\u7bb1\u8fdb\u7a0b<\/td>\n\u72ec\u7acb UID\u3001\u72ec\u7acb ART \u5b9e\u4f8b\u3001\u901a\u8fc7 Zygote fork \u51fa\u751f<\/td>\n<\/tr>\n
      \u5b57\u8282\u7801\u624d\u662f\u4ea4\u4ed8\u7269<\/td>\nAPK \u91cc\u4e0d\u662f .class，\u662f\u4e13\u95e8\u4e3a Android \u8bbe\u8ba1\u7684 .dex，\u7531 ART \u6267\u884c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n

      \u4e0b\u4e00\u7bc7\u9884\u544a：\u7b2c\u4e00\u677f\u5757：Android \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e8c\u7bc7 \u00b7 Android \u7f16\u8bd1\u3001\u6253\u5305\u4e0e\u5b89\u88c5\u673a\u5236\u2014\u2014\u4ece javac \u5230 d8 \u5230 dex \u5230 apk \u5230 PackageManagerService \u7684\u5b89\u88c5\u5168\u8fc7\u7a0b\u3002\u6211\u4eec\u5c06\u770b\u5230\u4f60\u5199\u7684\u90a3\u51e0\u4e2a .kt \/ .java \u6587\u4ef6\u7a76\u7adf\u662f\u5982\u4f55\u53d8\u6210\u4e00\u4e2a"\u53ef\u4ee5\u88ab\u7cfb\u7edf\u8bc6\u522b\u548c\u542f\u52a8\u7684\u5305"\u7684\u3002<\/p>\n

      \n","protected":false},"excerpt":{"rendered":"

      \u7b2c\u4e00\u677f\u5757：Android \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7：Android \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303\u6240\u5c5e\u677f\u5757：\u7b2c\u4e00\u677f\u5757 \u2014 Android \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406
      \n\u524d\u7f6e\u77e5\u8bc6：\u57fa\u7840\u7684 Linux \u64cd\u4f5c\u7cfb\u7edf\u6982\u5ff5（\u8fdb\u7a0b\/\u5185\u6838\/\u7cfb\u7edf\u8c03\u7528）\u3001Java \u8bed\u8a00\u8bed\u6cd5\u57fa\u7840
      \n\u672c\u7bc7\u5b9a\u4f4d：\u4ece\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u8ba4\u8bc6 Android \u662f\u4ec0\u4e48\u3001\u7531\u54ea\u4e9b\u5c42\u6b21\u6784\u6210\u3001\u6bcf\u4e00\u5c42\u627f\u62c5\u4ec0\u4e48\u804c\u8d23\u3001\u5c42\u4e0e\u5c42\u4e4b\u95f4\u901a\u8fc7\u4ec0\u4e48\u8fb9\u754c\u5951\u7ea6\u901a\u4fe1\u30021.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11403,11115,84,442],"topic":[],"class_list":["post-99690","post","type-post","status-publish","format-standard","hentry","category-server","tag-android","tag-aosp","tag-442"],"yoast_head":"\n\u7b2c\u4e00\u677f\u5757\uff1aAndroid \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7\uff1aAndroid \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/99690.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u7b2c\u4e00\u677f\u5757\uff1aAndroid \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7\uff1aAndroid \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u7b2c\u4e00\u677f\u5757：Android \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7：Android \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303\u6240\u5c5e\u677f\u5757：\u7b2c\u4e00\u677f\u5757 \u2014 Android \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 \u524d\u7f6e\u77e5\u8bc6：\u57fa\u7840\u7684 Linux \u64cd\u4f5c\u7cfb\u7edf\u6982\u5ff5（\u8fdb\u7a0b\/\u5185\u6838\/\u7cfb\u7edf\u8c03\u7528）\u3001Java \u8bed\u8a00\u8bed\u6cd5\u57fa\u7840 \u672c\u7bc7\u5b9a\u4f4d：\u4ece\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u8ba4\u8bc6 Android \u662f\u4ec0\u4e48\u3001\u7531\u54ea\u4e9b\u5c42\u6b21\u6784\u6210\u3001\u6bcf\u4e00\u5c42\u627f\u62c5\u4ec0\u4e48\u804c\u8d23\u3001\u5c42\u4e0e\u5c42\u4e4b\u95f4\u901a\u8fc7\u4ec0\u4e48\u8fb9\u754c\u5951\u7ea6\u901a\u4fe1\u30021.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/99690.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-02T16:37:22+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"15 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/99690.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/99690.html\",\"name\":\"\u7b2c\u4e00\u677f\u5757\uff1aAndroid \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7\uff1aAndroid \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-09-02T16:37:22+00:00\",\"dateModified\":\"2026-09-02T16:37:22+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/99690.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/99690.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/99690.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u7b2c\u4e00\u677f\u5757\uff1aAndroid \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7\uff1aAndroid \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u7b2c\u4e00\u677f\u5757\uff1aAndroid \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7\uff1aAndroid \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/99690.html","og_locale":"zh_CN","og_type":"article","og_title":"\u7b2c\u4e00\u677f\u5757\uff1aAndroid \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7\uff1aAndroid \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u7b2c\u4e00\u677f\u5757：Android \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7：Android \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303\u6240\u5c5e\u677f\u5757：\u7b2c\u4e00\u677f\u5757 \u2014 Android \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 \u524d\u7f6e\u77e5\u8bc6：\u57fa\u7840\u7684 Linux \u64cd\u4f5c\u7cfb\u7edf\u6982\u5ff5（\u8fdb\u7a0b\/\u5185\u6838\/\u7cfb\u7edf\u8c03\u7528）\u3001Java \u8bed\u8a00\u8bed\u6cd5\u57fa\u7840 \u672c\u7bc7\u5b9a\u4f4d：\u4ece\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u8ba4\u8bc6 Android \u662f\u4ec0\u4e48\u3001\u7531\u54ea\u4e9b\u5c42\u6b21\u6784\u6210\u3001\u6bcf\u4e00\u5c42\u627f\u62c5\u4ec0\u4e48\u804c\u8d23\u3001\u5c42\u4e0e\u5c42\u4e4b\u95f4\u901a\u8fc7\u4ec0\u4e48\u8fb9\u754c\u5951\u7ea6\u901a\u4fe1\u30021.","og_url":"https:\/\/www.wsisp.com\/helps\/99690.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-09-02T16:37:22+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"15 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/99690.html","url":"https:\/\/www.wsisp.com\/helps\/99690.html","name":"\u7b2c\u4e00\u677f\u5757\uff1aAndroid \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7\uff1aAndroid \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","isPartOf":{"@id":"https:\/\/www.wsisp.com\/helps\/#website"},"datePublished":"2026-09-02T16:37:22+00:00","dateModified":"2026-09-02T16:37:22+00:00","author":{"@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41"},"breadcrumb":{"@id":"https:\/\/www.wsisp.com\/helps\/99690.html#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wsisp.com\/helps\/99690.html"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.wsisp.com\/helps\/99690.html#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.wsisp.com\/helps"},{"@type":"ListItem","position":2,"name":"\u7b2c\u4e00\u677f\u5757\uff1aAndroid \u7cfb\u7edf\u57fa\u77f3\u4e0e\u8fd0\u884c\u539f\u7406 | \u7b2c\u4e00\u7bc7\uff1aAndroid \u7cfb\u7edf\u67b6\u6784\u5206\u5c42\u4e0e AOSP \u89c4\u8303"}]},{"@type":"WebSite","@id":"https:\/\/www.wsisp.com\/helps\/#website","url":"https:\/\/www.wsisp.com\/helps\/","name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","description":"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41","name":"admin","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/","url":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","contentUrl":"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery","caption":"admin"},"sameAs":["http:\/\/wp.wsisp.com"],"url":"https:\/\/www.wsisp.com\/helps\/author\/admin"}]}},"_links":{"self":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/99690","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/comments?post=99690"}],"version-history":[{"count":0,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/posts\/99690\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/media?parent=99690"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/categories?post=99690"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/tags?post=99690"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.wsisp.com\/helps\/wp-json\/wp\/v2\/topic?post=99690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}