自定义下拉菜单模式（Spinner与setDropDownViewResource）

新建一个继承Activity类的SpinnerSetDropDownViewResourceActivity，并设置布局文件为：spinnersetdropdownviewresource.xml。

在布局文件中添加一个TextView和一个Spinner。

  <TextView

        android:id="@+id/spinnersetdropdownviewresource_tv01"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center_horizontal"

        android:text="@string/show_information"

        android:textSize="20sp"/>

 

    <Spinner

        android:id="@+id/spinnersetdropdownviewresource_spinner"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:entries="@array/spinnerItem"

        android:prompt="@string/spinnersetdropdownviewresource_spinner_prompt"

        android:spinnerMode="dialog"/>

而后在Activity类中设置Spinner的选中监听。

package lyx.feng.second;

......

public class SpinnerSetDropDownViewResourceActivity extends Activity {

    private TextViewtv = null;

    private Spinnerspinner = null;

    private Stringitem[];

    private Animationanimation;

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       super.setContentView(R.layout.spinnersetdropdownviewresource);

 

       this.animation =new AlphaAnimation(0.0f, 1.0f);

       this.animation.setDuration(1000);

       this.animation.setFillAfter(true);

 

       this.item = getResources().getStringArray(R.array.spinnerItem);

 

       this.tv = (TextView)super

               .findViewById(R.id.spinnersetdropdownviewresource_tv01);

       this.spinner = (Spinner)super

               .findViewById(R.id.spinnersetdropdownviewresource_spinner);

       this.spinner.setOnItemSelectedListener(newOnItemSelectedListener() {

 

           @Override

           public void onItemSelected(AdapterView<?> parent, View view,

                  int position,long id) {

              tv.setText("你选择的是：" +item[position]);

           }

 

           @Override

           public void onNothingSelected(AdapterView<?> parent) {

           }

       });

       this.spinner.setOnTouchListener(new OnTouchListener() {

 

           @Override

           public boolean onTouch(View v, MotionEvent event) {

              spinner.startAnimation(animation);

              return false;

           }

       });

    }

}

 

也可以通过自定义的形式设置Spinner的显示风格。

adapter.setDropDownViewResource(R.layout.spinnersetdropdownviewresource_spinner_item);

此布局文件格式为：

<?xmlversion="1.0"encoding="utf-8"?>

<TextViewxmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/text1"

    style="?android:attr/spinnerDropDownItemStyle"

    android:layout_width="fill_parent"

    android:layout_height="50dp"

    android:background="@drawable/list_item"

    android:singleLine="true"/>