在服务启动对话框时不依赖Activity



在服务启动对话框不依赖Activity

Builder builder=new Builder(getApplicationContext());
builder.setTitle("Title");
builder.setMessage("This is message");
builder.setNegativeButton("OK",null);
Dialog dialog=builder.create();
dialog.getwindow().setType(WindowManager.LayoutParams.TYPE_SYstem_ALERT);
dialog.show();
权限
<uses-permission android:name="android.permission.SYstem_ALERT_WINDOW"/>