相關:Service中創建窗口顯示(TYPE_SYSTEM_ALERT, TYPE_SYSTEM_OVERLAY)
請求權限:
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"></uses-permission>
設置
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);//這裏設置的可以在桌面中顯示對話框
轉自:http://blog.csdn.net/rodulf/article/details/51550416