使用spinner做下拉对话框今天因为需要,要做一个对话框,android自带的列表框无法满足这种效果:先看看运行的效果图:点击后有向下显示的对话框:一下是实现的代码:public
使用spinner 做下拉对话框
今天因为需要,要做一个对话框,android自带的列表框无法满足这种效果:
先看看运行的效果图:
点击后有向下显示的对话框:
一下是实现的代码:
public class MainActivity extends Activity {
Button button;
View view;
AlertDialog.Builder alertBuidler;
ArrayAdapter adapter;
LayoutInflater inflate;
private List list = new ArrayList();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button)findViewById(R.id.button);
inflate = LayoutInflater.from(this);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
view = inflate.inflate(R.layout.alert_dialog, null);
Spinner spin = (Spinner)view.findViewById(R.id.spinner_City);
Spinner spin1 = (Spinner)view.findViewById(R.id.spinner_City1);
Spinner spin2 = (Spinner)view.findViewById(R.id.spinner_City2);
Spinner spin3 = (Spinner)view.findViewById(R.id.spinner_City3);
list.add(“北京”);
list.add(“上海”);
list.add(“深圳”);
list.add(“南京”);
list.add(“重庆”);
adapter = new ArrayAdapter(MainActivity.this,android.R.layout.simple_spinner_item, list);
//第三步:为适配器设置下拉列表下拉时的菜单样式。
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
//第四步:将适配器添加到下拉列表上
spin.setAdapter(adapter);
spin1.setAdapter(adapter);
spin2.setAdapter(adapter);
spin3.setAdapter(adapter);
new AlertDialog.Builder(MainActivity.this).setView(view).show();
view = null; //这句话不能少,否则会抛出异常
}
});
}
}
主布局文件:
<RelativeLayout xmlns:android=&#8220;http://schemas.android.com/apk/res/android&#8221;
xmlns:tools=&#8220;http://schemas.android.com/tools&#8221;
android:layout_width=&#8220;match_parent&#8221;
android:layout_height=&#8220;match_parent&#8221;
android:paddingBottom=&#8220;@dimen/activity_vertical_margin&#8221;
android:paddingLeft=&#8220;@dimen/activity_horizontal_margin&#8221;
android:paddingRight=&#8220;@dimen/activity_horizontal_margin&#8221;
android:paddingTop=&#8220;@dimen/activity_vertical_margin&#8221;
tools:context=&#8220;.MainActivity&#8221; >
<Button android:id=&#8220;@+id/button&#8221;
android:layout_width=&#8220;wrap_content&#8221;
android:layout_height=&#8220;wrap_content&#8221;
android:text=&#8220;click&#8221; />
RelativeLayout>
弹出对话框的布局文件:
<LinearLayout xmlns:android=&#8220;http://schemas.android.com/apk/res/android&#8221;
xmlns:tools=&#8220;http://schemas.android.com/tools&#8221;
android:id= &#8220;@+id/widget28&#8221;
android:layout_width= &#8220;fill_parent&#8221;
android:layout_height= &#8220;fill_parent&#8221;
android:orientation= &#8220;vertical&#8221; >
<Spinner
android:id= &#8220;@+id/spinner_City&#8221;
android:layout_width= &#8220;fill_parent&#8221;
android:layout_height= &#8220;wrap_content&#8221; >
Spinner>
<Spinner
android:id= &#8220;@+id/spinner_City1&#8221;
android:layout_width= &#8220;fill_parent&#8221;
android:layout_height= &#8220;wrap_content&#8221; >
Spinner>
<Spinner
android:id= &#8220;@+id/spinner_City2&#8221;
android:layout_width= &#8220;fill_parent&#8221;
android:layout_height= &#8220;wrap_content&#8221; >
Spinner>
<Spinner
android:id= &#8220;@+id/spinner_City3&#8221;
android:layout_width= &#8220;fill_parent&#8221;
android:layout_height= &#8220;wrap_content&#8221; >
Spinner>
LinearLayout>
其中的样式,可更具需要自行修改
Demo下载地址:
http://download.csdn.net/download/lyhdream/5192993