Android - 监听屏幕工作

ScreenObserver.java

    static class ScreenObserver {
        private Context mContext;
        private TrackingIO.ScreenObserver.ScreenBroadcastReceiver mScreenReceiver;
        private TrackingIO.ScreenStateListener mScreenStateListener;

        public ScreenObserver(Context context) {
            this.mContext = context;
            this.mScreenReceiver = new TrackingIO.ScreenObserver.ScreenBroadcastReceiver((TrackingIO.ScreenObserver.ScreenBroadcastReceiver)null);
        }

        public void requestScreenStateUpdate(TrackingIO.ScreenStateListener listener) {
            this.mScreenStateListener = listener;
            this.startScreenBroadcastReceiver();
        }

        public void stopScreenStateUpdate() {
            this.mContext.unregisterReceiver(this.mScreenReceiver);
        }

        private void startScreenBroadcastReceiver() {
            IntentFilter filter = new IntentFilter();
            filter.addAction("android.intent.action.SCREEN_ON");
            filter.addAction("android.intent.action.SCREEN_OFF");
            filter.addAction("android.intent.action.USER_PRESENT");
            this.mContext.registerReceiver(this.mScreenReceiver, filter);
        }

        private class ScreenBroadcastReceiver extends BroadcastReceiver {
            private String action;

            private ScreenBroadcastReceiver() {
                this.action = null;
            }

            public void onReceive(Context context, Intent intent) {
                this.action = intent.getAction();
                if("android.intent.action.SCREEN_ON".equals(this.action)) {
                    ScreenObserver.this.mScreenStateListener.onScreenOn();
                } else if("android.intent.action.SCREEN_OFF".equals(this.action)) {
                    ScreenObserver.this.mScreenStateListener.onScreenOff();
                } else if("android.intent.action.USER_PRESENT".equals(this.action)) {
                    ScreenObserver.this.mScreenStateListener.onScreenUnlock();
                }

            }
        }
    }

    interface ScreenStateListener {
        void onScreenOn();

        void onScreenOff();

        void onScreenUnlock();
    }