Button bb=new Button(getApplicationContext()); WindowManager wm=(WindowManager)getApplicationContext().getSystemService(Context.WINDOW_SERVICE); WindowManager.LayoutParams wmParams = new WindowManager.LayoutParams(); /* wmParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT; // 设置窗体焦点及触摸: // FLAG_NOT_FOCUSABLE(不能获得按键输入焦点) wmParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; // 设置显示的模式 wmParams.format = PixelFormat.RGBA_8888; // 设置对齐的方法 wmParams.gravity = Gravity.TOP | Gravity.LEFT; // 设置窗体宽度和高度 wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT; wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT */ wmParams.type=WindowManager.LayoutParams.TYPE_SYSTEM_ALERT; //type是关键,这里的2002表示系统级窗口,你也可以试试2003。 wmParams.format=1; wmParams.flags=40; wmParams.width=40; wmParams.height=40; wmParams.x = 10;//位置X wmParams.y = -420;//位置Y wm.addView(bb, wmParams);
记得加权限
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />