无法在未调用Looper.prepare() - Alertdialogbox的线程内创建处理程序

时间:2012-12-10 11:47:33

标签: android cordova

  

可能重复:
  Can’t create handler inside thread that has not called Looper.prepare()

我想在线程中调用alertdialogbox,如下所示

    public class connect implements Runnable
     {
     public void run()  //run method

    {

        AlertDialog.Builder alert = new AlertDialog.Builder(cordovaExample.activity);

        alert.setTitle("Confirm");
        alert.setMessage("Are you sure?");

        alert.setPositiveButton("YES", new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                // Do nothing but close the dialog

                dialog.dismiss();
            }

        });

        alert.setNegativeButton("NO", new DialogInterface.OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                // Do nothing
                dialog.dismiss();
            }
        });

        AlertDialog s = alert.create();
        alert.show();
       }
     }

我从以下活动中调用此帖子

public class cordovaExample extends DroidGap
{
    Context mcontext;

    public static cordovaExample activity;
private static MediaPlayer  music=null;
    @Override
    public void onCreate(Bundle savedInstanceState)

        {
            super.onCreate(savedInstanceState);

            activity=this;

                             super.init();



                   new Thread(new connect(this)).start();

                     }
                }

但是给出错误    无法在未调用Looper.prepare()

的线程内创建处理程序

任何帮助将不胜感激

2 个答案:

答案 0 :(得分:2)

在App UI线程中写下此行

 alert.show();

像这样的东西

MainActivity.this.runOnUiThread(new Runnable() {

        public void run() {
              alert.show();

        }
    });

答案 1 :(得分:1)

在线程运行时你无法对ui进行更改。如果你想这样做,使用Handler或runOnUiThead或者最好的选择就是使用AsyncTask。