Android 9休眠时任意键唤醒屏幕

码点2026-04-30 8:26

Android 9休眠时任意键唤醒屏幕

frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java

bash 复制代码

@Override
    public int interceptKeyBeforeQueueing(KeyEvent event, int policyFlags) {
        if (!mSystemBooted) {
            // If we have not yet booted, don't let key events do anything.
            return 0;
        }

        Log.d(TAG, "interceptKeyBeforeQueueing" );

        PowerManager powerManager=(PowerManager)mContext.getSystemService(Context.POWER_SERVICE);
        boolean isScreenOn =powerManager.isInteractive();//flag为true，屏幕状态为黑屏或亮屏未解锁，反之为亮屏。
        Log.d(TAG, "interceptKeyBeforeQueueing isScreenOn:"+isScreenOn );
        if(!isScreenOn){
            PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.SCREEN_BRIGHT_WAKE_LOCK
                                                | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE,getClass().getName());
            wakeLock.setReferenceCounted(false);
            if (!powerManager.isInteractive() ||(wakeLock != null && !wakeLock.isHeld())) {
                wakeLock.acquire();
                wakeLock.release();
            }
        }

        final boolean interactive = (policyFlags & FLAG_INTERACTIVE) != 0;
        final boolean down = event.getAction() == KeyEvent.ACTION_DOWN;
        final boolean canceled = event.isCanceled();
        final int keyCode = event.getKeyCode();

acquire()和release()要成对调用，如果只申请了亮屏，没有释放，屏幕会一直处于亮屏状态。所以调用acquire()后一定要记得释放！