1.1 Android reboot流程

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**思路： **執(zhí)行到shutdown::run時，
a.設置Flag QuickShutdown=true
b.以廣播通知系統(tǒng)一鍵加速清理進程，此時聯(lián)網(wǎng)、影響用戶體驗、最經(jīng)使用的TopN應用均需清理；

一鍵加速原理參考：

手機管理應用研究【4】—— 手機加速篇

2.1 AMS::startProcessLocked

    private final void startProcessLocked(ProcessRecord app, String hostingType,
            String hostingNameStr, String abiOverride, String entryPoint, String[] entryPointArgs) {
    if(QuickShutdown) return;
    ...
}

2.2 AMS::handleAppDiedLocked

/**
 * Main function for removing an existing process from the activity manager
 * as a result of that process going away.  Clears out all connections
 * to the process.
 */
private final void handleAppDiedLocked(ProcessRecord app,
        boolean restarting, boolean allowRestart) {
    if(QuickShutdown) { // 禁止Process重啟
        restarting = false;
        allowRestart = false;
    }
...
}

handleAppDiedLocked相關調(diào)用棧

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左邊分支cleanUpApplicationRecordLocked用于清理死亡進程中運行的四大組件service, BroadcastReceiver, ContentProvider相關信息;
右邊分支ASS.handleAppDiedLocked清理死亡進程中運行的activity相關信息

參考：
binder_died

2.3 AMS::killPackageProcessesLocked

private final boolean killPackageProcessesLocked(String packageName, int appId, int userId, int minOomAdj, boolean callerWillRestart, boolean allowRestart,
        boolean doit, boolean evenPersistent, String reason) {
    if (QuickShutdown) {
        callerWillRestart = false;
        allowRestart = false;
        evenPersistent = true; //persistent 進程需清理
        doit = true; //app.removed=true時，添加進程到procs中，procs中的進程將被removeProcessLocked
    }
...
}