我想知道我的 onPause() 和 onStop() 方法是否因为屏幕关闭而被调用。因此我写了一个广播接收器：
public class ScreenReceiver extends BroadcastReceiver {
public static boolean screenOn = true;
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
screenOn = false;
} else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
screenOn = true;
}
}
}
public class ExampleActivity extends Activity {
@Override
protected void onCreate() {
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
BroadcastReceiver mReceiver = new ScreenReceiver();
registerReceiver(mReceiver, filter);
}
@Override
protected void onPause() {
if (ScreenReceiver.screenOn) {
System.out.println("SCREEN TURNED OFF");
} else {
}
super.onPause();
}
@Override
protected void onResume() {
if (!ScreenReceiver.screenOn) {
System.out.println("SCREEN TURNED ON");
} else {
}
super.onResume();
}
}
如果因为关闭屏幕而调用了 onPause() 怎么可能？
也许有了这个？
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_POWER) {
return true;
}
return super.onKeyDown(keyCode, event);
}