Android - 導航抽屜片段

Question

我在我的Android應用程序中實現了導航抽屜。 但現在我希望能夠在用戶單擊導航欄中的任何列表項時使用片段更改布局。 這是我到目前為止所得到的：

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);
        }
    });
  }
}

使用上面的代碼，我在我的應用程序中實現了導航抽屜，我在導航抽屜中看到“一個”，“兩個”和“三個”列表項，但是當我點擊它們除了抽屜關閉之外沒有任何反應。 所以，我的問題是： 如何將片段功能添加到上面給出的代碼中？

我是初學者。 提前致謝！

Answer 1

點擊就可以了

  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;
     } 
}

Answer 2

用這個：

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();
}

}

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;
    }
    }

Answer 3

生成后一Navigation Drawer Activity由File->New->Activity->Navigation Drawer Activity ，這里有3個步驟

首先 ，轉到app_bar_main.xml然后

更換

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

通過

<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 ，轉到MainActivity - > onNavigationItemSelected然后修改它

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 ，創建Fragment類，例如Fragment

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;
    }
}

演示項目