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=""
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。