可以通过创建一个
Service在当前视图中添加视图的方法来做到这一点
WindowManager：
public class OverlayService extends Service { @Override public void onCreate() { super.onCreate(); WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE); View overlay = ; WindowManager.LayoutParams params = new WindowManager.LayoutParams( WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.TYPE_SYSTEM_alert, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE, PixelFormat.TRANSLUCENT); windowManager.addView(overlay , params); } @Override public IBinder onBind(Intent intent) { return null; } }但是您需要以下额外权限：
<uses-permission android:name="android.permission.SYSTEM_alert_WINDOW" />
然后只需在清单中注册服务：
<service android:name=".OverlayService" ></service>
并启动它：
startService(new Intent(this, OverlayService.class));
