debug debug Unable to add window android.view.View--permission denied for this window type

 1 AlertDialog builder=new AlertDialog.Builder(context).setTitle("注意：")
 2                 .setIcon(R.drawable.dailog_icon)
 3                 .setMessage("MS0"+ReceiveNumber+"请求建立语音连接,是否同意？")
 4                 .setPositiveButton("同意", new DialogInterface.OnClickListener() {
 5                     
 6                     @Override
 7                     public void onClick(DialogInterface arg0, int arg1) {
 8                         // TODO Auto-generated method stub
 9                         /*发送语音连接请求，同意接收*/
10                         System.out.println("进入语音连接请求中……………………");
11                         new Thread(new DataSend(CreateSignal.LinkReply(businessType))).start();/*发送连接请求同意信令，businessType业务类型*/
12                         new Thread(new DataSend(CreateSignal.AudioReceive())).start();/*发送音频接收操作命令*/
13                         Intent audioIntent=new Intent(context,PhoneInterface.class);
14                         audioIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
15                         context.startActivity(audioIntent);
16                     }
17                 })
18                 .setNegativeButton("取消", new DialogInterface.OnClickListener() {
19                     
20                     @Override
21                     public void onClick(DialogInterface arg0, int arg1) {
22                         // TODO Auto-generated method stub
23                         
24                     }
25                 }).create();
26         builder.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
27         builder.show();

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