[移动开发]Android AlertDialog 单选列表对话框练习

public class radioAlert extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_radio_alert);

        final String[] city = new String[]{"北京", "上海", "广州", "深圳", "杭州", "成都", "厦门"};

        AlertDialog.Builder builder = new AlertDialog.Builder(radioAlert.this);

        builder.setIcon(R.drawable.info).setTitle("选择你想去的城市，只能选一个哦");

        builder.setSingleChoiceItems(city, 0, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int which) {
                Toast.makeText(radioAlert.this, "你选择了"+city[which], Toast.LENGTH_SHORT).show();
            }
        });

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