让Android不播放关机动画，而是显示一个关机进度条的方法
修改文件:
frameworks/base/core/java/com/android/internal/app/ShutdownThread.java
synchronized (mEnableAnimatingSync) { if(!mEnableAnimating){ sInstance.mPowerManager.setBacklightBrightness(Power.BRIGHTNESS_DIM); } else { //add by bcf,将播放动画的BOOLEAN值设置为假，就不播放动画了，而是显示一个进度条+正在关机的字样 mShutOffAnimation=false; //add end if (mShutOffAnimation) { boolean isRotaionEnabled = false; try { isRotaionEnabled = Settings.System.getInt(sInstance.mContext.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, 1) != 0; if (isRotaionEnabled) { Settings.System.putInt(sInstance.mContext.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION, 0); Settings.System.putInt(sInstance.mContext.getContentResolver(), Settings.System.ACCELEROMETER_ROTATION_RESTORE, 1); } } catch (NullPointerException ex) { Log.e(TAG, "check Rotation: sInstance.mContext object is null when get Rotation"); } beginAnimationTime = SystemClock.elapsedRealtime() + MIN_SHUTDOWN_ANIMATION_PLAY_TIME; // +MediaTek 2012-02-25 Disable key dispatch try { final IWindowManager wm = IWindowManager.Stub.asInterface( ServiceManager.getService(Context.WINDOW_SERVICE)); wm.setEventDispatching(false); } catch (RemoteException e) {} // -MediaTek 2012-02-25 Disable key dispatch startBootAnimation(); } else { pd = new ProgressDialog(context); pd.setTitle(context.getText(com.android.internal.R.string.power_off)); pd.setMessage(context.getText(com.android.internal.R.string.shutdown_progress)); pd.setIndeterminate(true); pd.setCancelable(false); pd.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG); /* To fix video+UI+blur flick issue */ pd.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND); pd.show(); } /* set screen brightness off after shutdownThread start */ sInstance.mHandler.postDelayed(mDelayDim, screen_turn_off_time); } }