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();
            }
        });