ListView внутри ViewPager не прокручивается

Question

У меня есть ViewPager в моей деятельности. Я использую Fragment, чтобы отобразить список в ViewPager. В ViewPager я могу установить ListView. ListView может отображаться правильно, но ListView не прокручивается. Так мало элементов в списке не может быть показано.

Как это решить.

MainActivity

public class MainActivity extends Activity { 

private PageAdapter mSectionsPagerAdapter; 
private ViewPager mViewPager; 

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

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    TextView mTitle = (TextView) toolbar.findViewById(R.id.toolbar_title); 

    setSupportActionBar(toolbar); 
    // Create the adapter that will return a fragment for each of the three 
    // primary sections of the activity. 
    mSectionsPagerAdapter = new PageAdapter(getSupportFragmentManager(), 3); 

    // Set up the ViewPager with the sections adapter. 
    mViewPager = (ViewPager) findViewById(R.id.container); 
    mViewPager.setAdapter(mSectionsPagerAdapter); 

    TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs); 
    tabLayout.setupWithViewPager(mViewPager); 

    System.out.println(tabLayout.getTabCount()); 
    /* for (int i = 0; i < tabLayout.getChildCount(); i++) { 
     tabLayout.getChildAt(i).setBackgroundResource(R.drawable.tab_background_select); 
    }*/ 

    mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { 
     @Override 
     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { 

     } 

     @Override 
     public void onPageSelected(int position) { 
      Fragment j = mSectionsPagerAdapter.getItem(position); 
      if (j instanceof Downloads) { 
       ((Downloads) j).refresh(); 
      } 
     } 

     @Override 
     public void onPageScrollStateChanged(int state) { 

     } 
    }); 
    File folder = new File(Const.APP_folder); 
    boolean success = true; 
    if (!folder.exists()) { 
     folder.mkdir(); 
    } 
} 


@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_main, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

/** 
* A placeholder fragment containing a simple view. 
*/ 
public static class PlaceholderFragment extends Fragment { 

/** 
* Declare ListView . 
*/ 
ListView lv; 

public PlaceholderFragment() { 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    View rootView = inflater.inflate(R.layout.fragment_main, container, false); 

    /** 
    * Inititlize. 
    */ 
    lv = (ListView) rootView.findViewById(R.id.listView); 

    return rootView; 
} 

@Override 
public void onActivityCreated(Bundle savedInstanceState) { 
    super.onActivityCreated(savedInstanceState); 

    List<String> lst = new ArrayList<String>(); 
    for(int i = 1; i <= 10; i++) { 
     lst.add(i + ""); 
    } 

    ArrayAdapter<String> ArAd = new ArrayAdapter<String>(getActivity(), 
      android.R.layout.simple_list_item_1, lst); 
    lv.setAdapter(ArAd); 

} 

} 

} 

вот мой ListView XMLFILE

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context="com.app.down.fragments.PlaceholderFragment"> 

<ListView 
    android:id="@+id/listView" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:divider="@android:color/transparent" 
    android:dividerHeight="0dp" /> 
</LinearLayout> 

Mainactivity.xml

<android.support.design.widget.CoordinatorLayout 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:id="@+id/main_content" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:background="@drawable/bg" 
android:fitsSystemWindows="true" 
tools:context="com.app.down.MainActivity"> 

<android.support.design.widget.AppBarLayout 
    android:id="@+id/appbar" 
    style="@style/HeaderBar" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:paddingTop="@dimen/appbar_padding_top" 
    android:theme="@style/AppTheme.AppBarOverlay"> 

    <android.support.v7.widget.Toolbar 
     android:id="@+id/toolbar" 
     android:layout_width="match_parent" 
     android:layout_height="?attr/actionBarSize" 
     app:layout_scrollFlags="scroll|enterAlways" 
     app:popupTheme="@style/AppTheme.PopupOverlay"> 

     <TextView 
      android:id="@+id/toolbar_title" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_gravity="center" 
      android:text="Home" 
      android:textColor="#efe6c7" 
      android:textSize="30dp" /> 


    </android.support.v7.widget.Toolbar> 

    <android.support.design.widget.TabLayout 
     android:id="@+id/tabs" 
     style="@style/MyCustomTabLayout" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_margin="@dimen/activity_horizontal_margin" 
     android:background="@drawable/tab_main_border" 
     app:tabBackground="@drawable/tab_background_select" /> 

</android.support.design.widget.AppBarLayout> 

<android.support.v4.view.ViewPager 
    android:id="@+id/container" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    app:layout_behavior="@string/appbar_scrolling_view_behavior" /> 
</android.support.design.widget.CoordinatorLayout> 

Answer 1

Это известное ограничение ListView, вы можете использовать recyclerview, viewpager, координатор макета, которые играют вместе очень хорошо.