Android 常用資料配接器ArrayAdapter

標籤：

接著上篇文章《Android 採用Layout Inflater建立一個View對象》，本文採用常用資料配接器ArrayAdapter

建立項目後，在layout檔案夾下建立list_item.xml檔案，接著編輯布局，代碼如下:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="horizontal" >    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/ic_launcher" />    <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

接著在MainActivity中添加代碼：

package com.wuyudong.arrayadapter;import android.os.Bundle;import android.app.Activity;import android.view.Menu;import android.widget.ArrayAdapter;import android.widget.ListView;public class MainActivity extends Activity {    private static String[] names = { "功能1", "功能2", "功能3", "功能4", "功能5" };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        ListView lv = (ListView) findViewById(R.id.lv);        lv.setAdapter(new ArrayAdapter<String>(this, R.layout.list_item,                R.id.tv, names));    }}

運行一下：

ArrayAdapter的建構函式較多，其中的參數的含義可以參見原始碼

   /**     * Constructor     *     * @param context The current context.     * @param resource The resource ID for a layout file containing a TextView to use when     *                 instantiating views.     */    public ArrayAdapter(Context context, int resource) {        init(context, resource, 0, new ArrayList<T>());    }    /**     * Constructor     *     * @param context The current context.     * @param resource The resource ID for a layout file containing a layout to use when     *                 instantiating views.     * @param textViewResourceId The id of the TextView within the layout resource to be populated     */    public ArrayAdapter(Context context, int resource, int textViewResourceId) {        init(context, resource, textViewResourceId, new ArrayList<T>());    }    /**     * Constructor     *     * @param context The current context.     * @param resource The resource ID for a layout file containing a TextView to use when     *                 instantiating views.     * @param objects The objects to represent in the ListView.     */    public ArrayAdapter(Context context, int resource, T[] objects) {        init(context, resource, 0, Arrays.asList(objects));    }    /**     * Constructor     *     * @param context The current context.     * @param resource The resource ID for a layout file containing a layout to use when     *                 instantiating views.     * @param textViewResourceId The id of the TextView within the layout resource to be populated     * @param objects The objects to represent in the ListView.     */    public ArrayAdapter(Context context, int resource, int textViewResourceId, T[] objects) {        init(context, resource, textViewResourceId, Arrays.asList(objects));    }    /**     * Constructor     *     * @param context The current context.     * @param resource The resource ID for a layout file containing a TextView to use when     *                 instantiating views.     * @param objects The objects to represent in the ListView.     */    public ArrayAdapter(Context context, int resource, List<T> objects) {        init(context, resource, 0, objects);    }    /**     * Constructor     *     * @param context The current context.     * @param resource The resource ID for a layout file containing a layout to use when     *                 instantiating views.     * @param textViewResourceId The id of the TextView within the layout resource to be populated     * @param objects The objects to represent in the ListView.     */    public ArrayAdapter(Context context, int resource, int textViewResourceId, List<T> objects) {        init(context, resource, textViewResourceId, objects);    }

 

Android 常用資料配接器ArrayAdapter