Android

Question

我正在尝试创建一个包含项目的简单列表视图。我已经做了很多次，但这次由于某种原因，滚动不起作用。我正在使用基本适配器来显示项目，但它仍然不起作用。坚持了6个小时。任何帮助将不胜感激。片段中使用的 ListView 不滚动。

具有列表视图的片段：

public class BlankFragment extends Fragment {

String[] itemsList = {"uguga", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "g", "h", "i", "j", "k"};
View mView;
ListView mListView;
ArrayAdapter<String> mAdapter;

public BlankFragment() {
    // Required empty public constructor
}


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    mView = inflater.inflate(R.layout.fragment_blank, container, false);
    mListView = (ListView) mView.findViewById(R.id.newsFeedListView);
    mAdapter = new ArrayAdapter<String>(getActivity().getBaseContext(), android.R.layout.simple_dropdown_item_1line, android.R.id.text1, itemsList);
    mListView.setAdapter(mAdapter);
    return mView;
}
}

fragment_blank.xml

<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:dividerHeight="1dp"
android:divider="#000000"
android:id="@+id/newsFeedListView"
xmlns:android="http://schemas.android.com/apk/res/android"/>

activity_main.xml

<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">

    <FrameLayout android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:id="@+id/content_frame"
                 tools:context=".MainActivity" />

    <ListView
        android:layout_width="250dp"
        android:layout_height="match_parent"
        android:id="@+id/drawerItemsListView"/>

</android.support.v4.widget.DrawerLayout>

主要Activity.java

public class MainActivity extends ActionBarActivity {

DrawerLayout mDrawerLayout;
ListView mDrawerListView;
NewsFeedFragment mNewsFeedFragment;
ActionBar mActionBar;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    initReferences();
    initFragments();
    initProperties();
}

private void initProperties() {
    mActionBar.setBackgroundDrawable(new ColorDrawable(0xFF326CBB));
}

private void initFragments() {

    mNewsFeedFragment = NewsFeedFragment.newInstance();
    getSupportFragmentManager().beginTransaction().add(R.id.content_frame, new BlankFragment()).commit();
}

private void initReferences() {

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
    mDrawerListView = (ListView) findViewById(R.id.drawerItemsListView);
    mActionBar = getSupportActionBar();
}

}

Answer 1

将 ListView 高度设置为 "match_parent"。

Answer 2

好的。解决了这个。 MainActivity 上的 ListView 正在接受所有输入触摸，因为我没有为此指定重力。一旦我添加

android:layout_gravity="start"

到 MainActivity ListView，我可以滚动。

Android - 片段中的列表视图不滚动

Android - Listview in fragment not scrolling

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