手机APP开发 2016-11-25
在Android开发中,我们经常会需要在Android界面上弹出一些对话框,比如询问用户或者让用户选择。这些功能我们叫它Android Dialog对话框,AlertDialog实现方法为建造者模式。下面我们简单模拟一个挑媳妇的选择确定对话框(单选)对话框,不同于示例二之处在于本次只要不确定就可以后悔哦,如下图:
Layout界面代码:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <Button android:text="单向选择" android:layout_width="match_parent" android:layout_height="wrap_content" android:onClick="show3" android:id="@+id/button3" /> </LinearLayout>
Java功能实现代码:
public class AlertDialogDemo extends AppCompatActivity { int index=0; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.alertdialog); } public void show3(View v){ AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("挑媳妇儿"); final String[] beautifulGirls = {"芙蓉姐姐","凤姐","范爷","我自己"}; builder.setSingleChoiceItems(beautifulGirls, 0, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { index = which; } }); builder.setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(AlertDialogDemo.this,beautifulGirls[index]+"是你的媳妇了",Toast.LENGTH_SHORT).show(); } }); builder.show(); } }
优化空间很大,大家都可以玩玩。