Dialog alertDialog = new AlertDialog.Builder(this)        .setTitle("标题")        .setMessage("内容")        .setIcon(R.drawable.ic_launcher).create();        alertDialog.show();

public class MainActivity extends Activity {    okListener oklistener=new okListener();    noListener nolistener =new noListener();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.demo);        Dialog alertDialog = new AlertDialog.Builder(this).setTitle("标题")                .setMessage("内容").setIcon(R.drawable.ic_launcher)                .setPositiveButton("确定", oklistener)                .setNegativeButton("取消", nolistener)                .create();        alertDialog.show();    }        public class okListener implements DialogInterface.OnClickListener{        @Override        public void onClick(DialogInterface dialog, int which) {            // TODO Auto-generated method stub                    }            }        public class noListener implements DialogInterface.OnClickListener{        @Override        public void onClick(DialogInterface dialog, int which) {            // TODO Auto-generated method stub                    }            }        }