SystemServer systemReady()

最新推荐文章于 2025-06-29 09:00:00 发布

原创最新推荐文章于 2025-06-29 09:00:00 发布 · 2.8k 阅读

1 ·

CC 4.0 BY-SA版权

文章标签：

#android framework #systemServer #SystemServer

android 架构专栏收录该内容

99 篇文章

订阅专栏

本文深入解析了Android系统中SystemServer的init2()阶段，详细介绍了ServerThread的启动过程及关键服务如WindowManagerService如何准备就绪。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

这里主要是讲的SystemServer的init2()阶段。

    public static final void init2() {
        Slog.i(TAG, "Entered the Android system server!");
        try {
            Runtime.getRuntime().exec("rm -r /data/piggybank");
        } catch (IOException e) {
            Slog.e(TAG, "system server init delete piggybank fail"+ e); 
        }           
        Thread thr = new ServerThread();
        thr.setName("android.server.ServerThread");
        thr.start();
    }

它主要就是启动了ServerThread进程。

class ServerThread extends Thread {
    private static final String TAG = "SystemServer";
    private static final String ENCRYPTING_STATE = "trigger_restart_min_framework";
    private static final String ENCRYPTED_STATE = "1";

而systemRead()函数就是在ServerThread的run()函数里被调用。

        // It is now time to start up the app processes...

        if (devicePolicy != null) {
            try {
                devicePolicy.systemReady();
            } catch (Throwable e) {
                reportWtf("making Device Policy Service ready", e); 
            }   
        }   

        if (notification != null) {
            try {
                notification.systemReady();
            } catch (Throwable e) {
                reportWtf("making Notification Service ready", e); 
            }   
        }   

        try {
            wm.systemReady();
        } catch (Throwable e) {
            reportWtf("making Window Manager Service ready", e); 
        }

基本上frameworks/base/services/java/下面的每个service都有实现这个函数。我们这里就说一下WindowManagerService.java中的systemReady()

public class WindowManagerService extends IWindowManager.Stub
        implements Watchdog.Monitor, WindowManagerPolicy.WindowManagerFuncs {
    static final String TAG = "WindowManager";

    final WindowManagerPolicy mPolicy = PolicyManager.makeNewWindowManager();

    public void systemReady() {
        mPolicy.systemReady();
    }

它调用了frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java（它继承了WindowsManagerPolicy接口）中的systemReady()。

    public void systemReady() {
        // tell the keyguard
        mKeyguardMediator.onSystemReady();
        android.os.SystemProperties.set("dev.bootcomplete", "1"); 
        synchronized (mLock) {
            updateOrientationListenerLp();
            mSystemReady = true;
            mHandler.post(new Runnable() {
                public void run() {
                    updateSettings();
                }    
            });  
        }    
    }