Android service里面启动activity和alertdialog .

Service 里面 默认不允许 启动 AlertDilag.

 

 

启动activity源码:(记得要加上Intent.FLAG_ACTIVITY_NEW_TASK)

1. Intent intent = new Intent();  
2. intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);   
3. intent.setClass(getApplicationContext(),FileBrowserActivity.class);  
4. startActivity(intent); 

启动alertDialog源码:

1.         AlertDialog.Builder builder = new AlertDialog.Builder(this);  
2.         builder.setMessage("是否接受文件?")  
3.                 .setPositiveButton("是", new DialogInterface.OnClickListener() {  
4.                     @Override 
5.                     public void onClick(DialogInterface dialog, int which) {  
6.  
7.                     }  
8.                 }).setNegativeButton("否", new OnClickListener() {  
9.                     @Override 
10.                     public void onClick(DialogInterface dialog, int which) {  
11.                     }  
12.                 });  
13.         AlertDialog ad = builder.create();  
14. //      ad.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG); //系统中关机对话框就是这个属性   
15.         ad.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);  
16.         ad.setCanceledOnTouchOutside(false);                                   //点击外面区域不会让dialog消失  
17.         ad.show(); 

还要加上权限

1. <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />