自定義下拉菜單模式（Spinner與setDropDownViewResource）

自定義下拉菜單模式（Spinner與setDropDownViewResource）

新建一個繼承Activity類的SpinnerSetDropDownViewResourceActivity，並設置佈局文件爲：spinnersetdropdownviewresource.xml。

在佈局文件中添加一個TextView和一個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" />

而後在Activity類中設置Spinner的選中監聽。

package lyx.feng.second;

......

public class SpinnerSetDropDownViewResourceActivity extends Activity {

    private TextView tv = null;

    private Spinner spinner = null;

    private String item[];

    private Animation animation;

 

    @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(new OnItemSelectedListener() {

 

           @Override

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

                  int position, long id) {

              tv.setText("你選擇的是：" + 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;

           }

       });

    }

}

 

也可以通過自定義的形式設置Spinner的顯示風格。

adapter.setDropDownViewResource(R.layout.spinnersetdropdownviewresource_spinner_item);

此佈局文件格式爲：

<?xml version="1.0" encoding="utf-8"?>

<TextView xmlns: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" />