Question

我在单击textView时尝试创建ListView。我需要为这个新ListView的项添加一个监听器。

这是ListView：

我的问题是方法setOnItemClickListener（）似乎不起作用，因此我无法打开包含该项目子项的下一个ListView。

在附件中我们可以看到两件事：

布局：它显示了Android的所有内容的布局，我的问题出在底部的ListView中。

<include
    layout="@layout/app_bar_content_home"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true" >
    <LinearLayout

xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingTop="84dp"
    android:paddingBottom="16dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:background="@color/black">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="2dp"
        android:background="@color/white"/>

    <ListView
        android:visibility="gone"
        android:id="@+id/navigationList"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></ListView>

    </LinearLayout>
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>

Class：这只是来自真实课程的片段，但已经足够了。我在这里尝试做的是当用户点击调用的按钮时方法＆＃34; buttonClicked＆＃34;他的身份是＆＃34;标题＆＃34;，我做了几件事，但是重要的一个是在Layout文件中调用ListView设置他的适配器和make 类＆＃34; setOnItemClickListener＆＃34;，它允许ListView的项目被称为：

public void buttonClicked(View view) {
NavigationView gg = (NavigationView) findViewById(R.id.nav_view);
int id = view.getId();
switch (id){
    case R.id.title:
        TextView title = (TextView) findViewById(R.id.title);
        String titleText=title.getText().toString();
        LinearLayout needsGone=(LinearLayout) findViewById(R.id.needsGone);
        ListView navigationListView=(ListView)findViewById(R.id.navigationList);
        if (titleText.equalsIgnoreCase(getResources().getString(R.string.Content))){
            //TextView title = (TextView) findViewById(R.id.title);
            title.setText(R.string.main_menu);
            needsGone.setVisibility(View.GONE);

            navigationListView.setVisibility(View.VISIBLE);
            adapter = new NavigationAdapter(this, new ArrayList<NavigationClass>());

            navigationListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
                    System.out.println("This is where it does not do anything);

                }
            });
            navigationListView.setAdapter(adapter);

            new GetTaskDone().execute(request1Url);
        }else if(titleText.equalsIgnoreCase(getResources().getString(R.string.main_menu))){
            title.setText(R.string.Content);
            needsGone.setVisibility(View.VISIBLE);
            navigationListView.setVisibility(View.GONE);
        }
        break;
...
}
}

AsyncTask我在适配器中收取信息：

        protected class GetTaskDone extends AsyncTask<String, Void, 
    List<NavigationClass>> {
            @Override
            protected List<NavigationClass> doInBackground(String... urls) {
                if (urls.length < 1 || urls[0] == null) {
                    return null;
                }
                List<NavigationClass> result = 
     appUtils.fetchDataApp_Navigation(urls[0]);
                return result;
                //navigationList=appUtils.fetchDataApp_Navigation(urls[0]);
                //return appUtils.fetchDataApp_Navigation(urls[0]);
            }

            @Override
            protected void onPostExecute(List<NavigationClass> data) {
                adapter.clear();

                if (data != null && !data.isEmpty()) {
                    adapter.addAll(data);
                }
                //super.onPostExecute(result);
            }

        }
        }

ListView.SetOnItemClickListener不起作用

0 个答案: