service 弹出对话框
在对话框dialog.show();之前添加如下语句
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
同时配置androidmainfest.xml文件
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"></uses-permission>
service 启动activity
Intent intent = new Intent(getBaseContext(),targetActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
getApplication.startActivity(intent);