3

我已经在我的 android 应用程序中实现了导航抽屉。但是现在我希望能够在用户单击导航栏中的任何列表项时使用片段来更改布局。这是我到目前为止所得到的：

XML

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

    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:background="#000000"
        android:layout_height="match_parent" >       
    </FrameLayout>

    <ListView android:id="@+id/left_drawer"
        android:layout_width="220dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="#111"/>
</android.support.v4.widget.DrawerLayout>

Java 文件

public class MainActivity extends Activity {
final String[] data ={"one","two","three"};

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

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, data);

    final DrawerLayout drawer = (DrawerLayout)findViewById(R.id.drawer_layout);
    final ListView navList = (ListView) findViewById(R.id.left_drawer);
    navList.setAdapter(adapter);
    navList.setOnItemClickListener(new AdapterView.OnItemClickListener(){
        @Override
        public void onItemClick(AdapterView<?> parent, View view, final int pos,long id){
            drawer.setDrawerListener( new DrawerLayout.SimpleDrawerListener(){
                @Override
                public void onDrawerClosed(View drawerView){
                    super.onDrawerClosed(drawerView);

                }
            });
            drawer.closeDrawer(navList);
        }
    });
  }
}

使用上面的代码，我在我的应用程序中实现了导航抽屉，我在导航抽屉中看到了“一”、“二”和“三”列表项，但是当我点击它们时除了抽屉关闭之外什么也没有发生。所以，我的问题是： 如何将片段功能添加到上面给定的代码中？

我是初学者。提前致谢！

4

3 回答 3

7

点击有

  selectItem(pos);

然后

public void selectItem(int position)
{
     switch(position)
     {
          case 0:
                     // fragment1
                     // use fragment transaction and add the fragment to the container
                     FragmentManager fragmentManager = getFragmentManager()
                     FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();   
                     Fragment1 fragment = new Fragment1();
                     fragmentTransaction.add(R.id.content_frame, fragment);
                     fragmentTransaction.commit();

          break;
          case 1:
                     // fragment2
          break; 
          case 2:
                     // fragment2
          break;
     } 
}
于 2014-01-11T06:20:11.900 回答
2

用这个：

public class MenuFragmentActivity extends FragmentActivity{
@Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.base_layout);
    addFragments(new Sample(), false, false,
            AndyConstants.CONTENT_PAGE);
     }

    public void addFragments(Fragment fragment, boolean animate,
        boolean addToBackStack, String tag) {

    FragmentManager manager = getSupportFragmentManager();
    FragmentTransaction ft = manager.beginTransaction();
    if (animate) {
         ft.setCustomAnimations(R.anim.fragment_from_right,
         R.anim.fragment_from_left, R.anim.fragment_from_right,
         R.anim.fragment_from_left);
    }
    if (addToBackStack) {
        ft.addToBackStack(tag);
    }
    ft.replace(R.id.content_frame, fragment);
    ft.commit();
}

}

对于片段：

public class Sample extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
}
    @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
    Bundle savedInstanceState) {
        // TODO Auto-generated method stub
            View view = inflater.inflate(R.layout.page, container, false);
        return view;
    }
    }
于 2014-01-11T06:35:18.377 回答
1

生成Navigation Drawer Activityby后File->New->Activity->Navigation Drawer Activity，这里有 3 个步骤

首先app_bar_main.xml，然后去

代替

<include layout="@layout/content_main"/>

经过

<FrameLayout
        android:id="@+id/frame_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        />

其次，转到MainActivity->onNavigationItemSelected然后像这样修改它

public boolean onNavigationItemSelected(@NonNull MenuItem item) {
    int id = item.getItemId();
    Fragment fragment = null;
    if (id == R.id.nav_camera) {
        fragment = CameraFragment.newInstance();
    } else if (id == R.id.nav_gallery) {
        fragment = GalleryFragment.newInstance();
    } else if (id == R.id.nav_slideshow) {
        fragment = SlideShowFragment.newInstance();
    }

    FragmentManager fragmentManager = getSupportFragmentManager();
    fragmentManager.beginTransaction().replace(R.id.frame_content, fragment).commit();

    setTitle(item.getTitle());

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}

最后，创建Fragment类，例如一个片段

public class CameraFragment extends Fragment{

    public static CameraFragment newInstance() {
         Bundle args = new Bundle();
         CameraFragment fragment = new CameraFragment();
        fragment.setArguments(args);
        return fragment;
    }

    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
            @Nullable Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_camera, null, false);
        return rootView;
    }
}

演示项目

在此处输入图像描述

于 2017-12-01T09:25:28.660 回答