onItemClickListener未在自定义ArrayAdapter上触发

Question

我有一个Activity从Web服务检索数据.这个数据ListView通过一个ArrayAdapter 呈现在一个ArrayAdapter中,里面RelativeLayout有三个TextViews内部,没什么花哨的,它工作得很好.

现在我想要实现一个Activity应该在用户单击ListView中的项目时调用的详细信息,听起来很简单,但我不能在我的生活中使用onItemClickListener来处理我的ArrayAdapter.

这是我的主要内容Activity:

public class Schema extends Activity {

    private ArrayList<Lesson> lessons = new ArrayList<Lesson>();
    private static final String TAG = "Schema";
    ListView lstLessons;
    Integer lessonId;

    // called when the activity is first created.
    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        // can we use the custom titlebar?
        requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);

        // set the view
        setContentView(R.layout.main);

        // set the title
        getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.titlebar);

        // listview called lstLessons
        lstLessons = (ListView)findViewById(R.id.lstLessons);

        // load the schema
        new loadSchema().execute();

        // set the click listeners
        lstLessons.setOnItemClickListener(selectLesson);      

    }// onCreate

// declare an OnItemClickListener for the AdapterArray (this doesn't work)
private OnItemClickListener selectLesson = new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View v, int i, long l) {  
        Log.v(TAG, "onItemClick fired!");
    }                
};

private class loadSchema extends AsyncTask<Void, Void, Void> {

    private ProgressDialog progressDialog; 

    // ui calling possible
    protected void onPreExecute() {
        progressDialog = ProgressDialog.show(Schema.this,"", "Please wait...", true);
    }

    // no ui from this one
    @Override
    protected Void doInBackground(Void... arg0) {
    // get some JSON, this works fine
    }

    @Override
    protected void onPostExecute(Void result) {
        progressDialog.dismiss();
        // apply to list adapter
        lstLessons.setAdapter(new LessonListAdapter(Schema.this, R.layout.list_item, lessons));        
    }

我的ArrayAdapter代码:

// custom ArrayAdapter for Lessons 
private class LessonListAdapter extends ArrayAdapter<Lesson> {
    private ArrayList<Lesson> lessons;

    public LessonListAdapter(Context context, int textViewResourceId, ArrayList<Lesson> items) {
        super(context, textViewResourceId, items);
        this.lessons = items;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View v = convertView;
        if (v == null) {
                LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                v = vi.inflate(R.layout.list_item, null);
        }
        Lesson o = lessons.get(position);

        TextView tt = (TextView) v.findViewById(R.id.titletext);
        TextView bt = (TextView) v.findViewById(R.id.timestarttext);
        TextView rt = (TextView) v.findViewById(R.id.roomtext);

        v.setClickable(true);
        v.setFocusable(true);

        tt.setText(o.title);
        bt.setText(o.fmt_time_start);
        rt.setText(o.room);
        return v;
    }
}// LessonListAdapter

main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:id="@+id/main"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="fill_parent" android:layout_width="fill_parent"
    android:screenOrientation="portrait"
    >

    <!-- student name -->
    <TextView 
      android:id="@+id/schema_view_student"
      android:text="Name"  android:padding="4dip"
      android:layout_height="wrap_content"
      android:layout_width="fill_parent"
      android:gravity="center_vertical|center_horizontal"
      style="@style/schema_view_student"
    />

    <!-- date for schema -->    
    <TextView
      android:id="@+id/schema_view_title"   
      android:layout_height="wrap_content"
      android:layout_margin="0dip" 
      style="@style/schema_view_day"
      android:gravity="center_vertical|center_horizontal"
      android:layout_below="@+id/schema_view_student"         
      android:text="Date" android:padding="6dip"
      android:layout_width="fill_parent"
    />

    <!-- horizontal line -->
    <View
      android:layout_width="fill_parent"
      android:layout_height="1dip"
      android:background="#55000000"
      android:layout_below="@+id/schema_view_title"
    />

    <!--  list of lessons -->
    <ListView
      android:id="@+id/lstLessons" 
      android:layout_height="wrap_content"
      android:layout_width="fill_parent"
      android:layout_below="@+id/schema_view_title"
    />

</RelativeLayout>

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="60px"
    android:padding="12dip">

    <TextView
        android:id="@+id/timestarttext"
        android:text="09:45"
        style="@style/LessonTimeStartText"

        android:layout_width="60dip"

        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true"

        android:layout_height="fill_parent" android:gravity="center_vertical|right" android:paddingRight="6dip"/>

    <TextView
        android:id="@+id/titletext"
        android:text="Test"
        style="@style/LessonTitleText"

        android:layout_width="wrap_content"
        android:layout_height="fill_parent"

        android:layout_toRightOf="@+id/timestarttext"

        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true" android:gravity="center_vertical|center_horizontal"/>

    <TextView
        android:id="@+id/roomtext"
        android:text="123"

        android:layout_width="wrap_content"
        android:layout_height="fill_parent"

        style="@style/LessonRoomText"
        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:gravity="center_vertical" />

</RelativeLayout>

在过去的几个小时里一直在搞乱我,我似乎无法理解问题所在.我的问题看起来非常类似于这个问题,但我没有扩展ListActivity,所以我仍然不知道我的onListClickItem()应该去哪里.

更新:现在我已经困惑了几天,仍然无法找到问题.

我应该重写活动吗,这次扩展ListActivity而不是Activity？因为它本身提供了onItemClick方法,并且可能更容易覆盖.

或者,我应该直接在我的ArrayAdapter中的每个getView()中绑定一个侦听器吗？我相信我已经读过这是不好的做法(我应该这样做,因为我尝试过并且在我的帖子中失败了).

Answer 1

发现了错误 - 似乎是这个问题.添加android:focusable="false"到每个list_item.xml元素解决了问题,现在使用原始代码触发onclick.

Answer 2

我遇到了同样的问题,并尝试了你的修复,但无法让它工作.什么工作对我来说是添加android:descendantFocusability="blocksDescendants"到<RelativeLayout>从项目布局xml, list_item.xml你的情况.这允许onItemClick()被调用.

Answer 3

什么对我有用:

1)将android:descendantFocusability ="blocksDescendants"添加到Relative Layout标签.结果如下所示:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:descendantFocusability="blocksDescendants" >

2)将list:focusable ="false"添加到list_item.xml示例中的每个元素:

<TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"     
        android:text="TextView"
        android:focusable="false" />

Answer 4

一旦我遇到类似的问题.每个列表项都有一个文本视图和一个复选框,只是因为复选框,整个listitem没有" 启用 "来触发事件.我在获取视图时通过在适配器内部制作一个小技巧解决了这个问题.

就在返回视图之前我说:

v.setOnClickListener(listener);

(该对象listener是onItemClickListener我给了它Adapter的构造函数).

但我必须告诉你,问题是因为平台,这是一个bug.