Android中弹出对话框，AlertDialog关键代码

写在这里便于以后查看。

Android中弹出对话框的关键代码：

 btn01.setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 Toast.makeText(musicActivity.this, "tanchu", 100).show();
                 // 以下是弹出对话框的关键代码,
                 AlertDialog.Builder b = new AlertDialog.Builder(
                         musicActivity.this);
                 b.setTitle("wyl");
                 b.setIcon(R.drawable.icon);
                 b.setCancelable(true);
                 b.setMessage("这是.setMessage(String str)方法");
                 b.setPositiveButton("positivieButton..",
                         new DialogInterface.OnClickListener() {

                             @Override
                             public void onClick(DialogInterface dialog,
                                     int which) {

                                 Toast.makeText(musicActivity.this,
                                         "xxxxxxxxxx", 100).show();

                             }
                         });
                 b.setNegativeButton("否", new DialogInterface.OnClickListener() {

                     @Override
                     public void onClick(DialogInterface dialog, int which) {
                         // TODO Auto-generated method stub
                         Toast.makeText(musicActivity.this, "否...", 100).show();
                     }
                 });
                 b.create().show();
             }
         });