Android判断屏幕开关状态

方法一：使用系统服务

PowerManager pm= (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);

        if(!pm.isScreenOn())
        {
            //熄屏状态
        }

方法二：使用广播

public class ScreenReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {

//收到亮屏广播

        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {

//收到熄屏广播

        }

    }
    }

//注册广播
ScreenReceiver sOnBroadcastReciver=new ScreenReceiver();
        IntentFilter recevierFilter=new IntentFilter();
        recevierFilter.addAction(Intent.ACTION_SCREEN_ON);
        recevierFilter.addAction(Intent.ACTION_SCREEN_OFF);
        registerReceiver(sOnBroadcastReciver, recevierFilter);

//取消注册
if(sOnBroadcastReciver!=null)
        {
            unregisterReceiver(sOnBroadcastReciver);
        }

注意：亮屏和熄屏广播只能通过动态注册才能收到。