OnItemClickListener 为 ListView 使用 ArrayAdapter

问题描述

我想为使用 ArrayAdapter 创建的 ListView 提供 OnItemClickListener

I want to have an OnItemClickListener for a ListView I create using an ArrayAdapter

这是我用来创建它的代码:

This is the code I use to create it:

List<Comment> values = datasource.some_search("Wednesday","11");
        ArrayAdapter<Comment> adapter = new ArrayAdapter<Comment>(this,
                android.R.layout.simple_list_item_1, values);
        setListAdapter(adapter);

如何实现 onItemClickListener?

How do I implement onItemClickListener?

谢谢！

我在 ArrayAdapter 和 ListView 中使用一串对象.

I am using in my ArrayAdapter and ListView a string of objects.

编辑 2:更多代码:

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        datasource = new CommentsDataSource(this);
        datasource.open();
        //check if database is populated if NOT, populate with txtToDb();

        if (!datasource.isPopulated()) {
            // Database is not populated so copy it from assets here
            try {
                txtToDb();
                Log.i("Database", "Was not Populated");
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                Log.i("Database", "Was not populated: txtToDb(); failed");

            }

        } else {
            Log.i("Database", "Populated");
        }

        //wat to show on screen:
        List<Comment> values = datasource.search("Wednesday","11");


        // Use the SimpleCursorAdapter to show the
        // elements in a ListView
        ArrayAdapter<Comment> adapter = new ArrayAdapter<Comment>(this,
                android.R.layout.simple_list_item_1, values);
        setListAdapter(adapter);

    }

编辑 3:XML:

<?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="match_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:id="@+id/group"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/add"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Add New"
            android:onClick="onClick"/>

        <Button
            android:id="@+id/delete"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Delete First"
            android:onClick="onClick"/>

    </LinearLayout>

    <ListView
        android:id="@android:id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

</LinearLayout>

推荐答案

使用 OnItemClickListener

Use OnItemClickListener

   ListView lv = getListView();
   lv.setOnItemClickListener(new OnItemClickListener()
   {
      @Override
      public void onItemClick(AdapterView<?> adapter, View v, int position,
            long arg3)
      {
            String value = (String)adapter.getItemAtPosition(position);
            // assuming string and if you want to get the value on click of list item
            // do what you intend to do on click of listview row
      }
   });

当您单击一行时，会触发一个侦听器.所以你在列表视图上 setOnClickListener 并使用匿名内部类 OnItemClickListener.

When you click on a row a listener is fired. So you setOnClickListener on the listview and use the annonymous inner class OnItemClickListener.

您还可以覆盖 onItemClick.第一个参数是一个适配器.第二个参数是视图.第三个参数是位置(列表视图项的索引).

You also override onItemClick. The first param is a adapter. Second param is the view. third param is the position ( index of listview items).

使用你获得物品的位置.

Using the position you get the item .

根据您的评论，我假设您需要设置适配器或列表视图

Edit : From your comments i assume you need to set the adapter o listview

所以假设你的活动扩展了 ListActivtiy

So assuming your activity extends ListActivtiy

     setListAdapter(adapter);

或者如果你的活动类扩展了活动

Or if your activity class extends Activity

     ListView lv = (ListView) findViewById(R.id.listview1);
     //initialize adapter
     lv.setAdapter(adapter);

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