安卓开发 点击弹出确认取消对话框

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
/*
* 图片对话框
Toast toast = Toast.makeText(this, "dianji", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
LinearLayout toast_layout = (LinearLayout)toast.getView();
ImageView imgview = new ImageView(this);
imgview.setImageResource(R.drawable.img1);
toast_layout.addView(imgview);
toast.show();
*/

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("测试确认对话框");
builder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
String[] items={"唱歌","学习","跑步"};
String str = items[which];
Toast.makeText(MainActivity.this, "我的爱好是:"+str, Toast.LENGTH_LONG).show();

}
});
AlertDialog dialog = builder.create();
dialog.show();
}