在Navigation-Drawer的抽屜中加載自定義片段並在主佈局中打開相應的片段

Question

我想根據某些條件在我的抽屜中加載不同的片段。你說：

if(bit =0){ 
load fragment0(); 
} 
else if(bit =1){ 
load fragment1(); 
} 

而且每個片段（fragment0 &片段1）包含它自己的項和按鈕/視圖列表。 然後根據項目在抽屜碎片中點擊，我想在主佈局中加載相應的碎片。 下面是我正在使用的代碼：

這是在抽屜爲片段1

public class LaunchActivity extends FragmentActivity { 

private DrawerLayout DrawerLayout; 
//private ListView DrawerList; 
private FrameLayout DrawerList; 
private ActionBarDrawerToggle DrawerToggle; 

@SuppressWarnings("unused") 
private CharSequence DrawerTitle; 
private CharSequence Title; 
private String[] ListTitles; 


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

    Title = DrawerTitle = getTitle(); 
    ListTitles = getResources().getStringArray(R.array.list_array); 
    DrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); 
    //DrawerList = (ListView) findViewById(R.id.left_drawer); 
    DrawerList = (FrameLayout) findViewById(R.id.left_drawer); 


    // initialize drawer list 
    // Also set a custom shadow that overlays the main content when the drawer opens 
    DrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); 

// change frames 
    int bit =0; 

    if(bit==1){  
    // add fragments to drawer list 
    Fragment newFragment; 
    FragmentTransaction transaction = getFragmentManager().beginTransaction(); 
    newFragment = new testfragment(); 
    transaction.add(R.id.left_drawer, newFragment); 
    transaction.addToBackStack(null); 
    transaction.commit(); 

    } 

    else 
    { 
     // add fragments to drawer list 
     Fragment newFragment; 
     FragmentTransaction transaction = getFragmentManager().beginTransaction(); 
     newFragment = new testfragment1(); 
     transaction.add(R.id.left_drawer, newFragment); 
     transaction.addToBackStack(null); 
     transaction.commit(); 

    } 




    // set up the drawer's list view with items and click listener 
// DrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_itemlist, ListTitles)); 
// DrawerList.setOnItemClickListener(new DrawerItemClickListener()); 


    // enable ActionBar app icon to behave as action to toggle nav drawer 
    getActionBar().setDisplayHomeAsUpEnabled(true); 
    getActionBar().setHomeButtonEnabled(true); 

    // ActionBarDrawerToggle ties together the the proper interactions 
    // between the sliding drawer and the action bar app icon 
    DrawerToggle = new ActionBarDrawerToggle(
      this,     /* host Activity */ 
      DrawerLayout,   /* DrawerLayout object */ 
      R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ 
      R.string.drawer_open, /* "open drawer" description for accessibility */ 
      R.string.drawer_close /* "close drawer" description for accessibility */ 
      ) { 
     public void onDrawerClosed(View view) { 
      getActionBar().setTitle(Title); 
      invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() 
     } 

     public void onDrawerOpened(View drawerView) { 
      getActionBar().setTitle(Title); // same title for open/close drawer 
      //getActionBar().setTitle(DrawerTitle); 
      invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() 
     } 
    }; 

    DrawerLayout.setDrawerListener(DrawerToggle); 
    if (savedInstanceState == null) { 
//  selectItem(0); 
    } 
} 


/** 
* When using the ActionBarDrawerToggle, you must call it during 
* onPostCreate() and onConfigurationChanged()... 
*/ 



@Override 
protected void onPostCreate(Bundle savedInstanceState) { 
    super.onPostCreate(savedInstanceState); 
    // Sync the toggle state after onRestoreInstanceState has occurred. 
    DrawerToggle.syncState(); 
} 

@Override 
public void onConfigurationChanged(Configuration newConfig) { 
    super.onConfigurationChanged(newConfig); 
    // Pass any configuration change to the drawer toggle 
    DrawerToggle.onConfigurationChanged(newConfig); 
} 





// option menu - action bar 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    MenuInflater inflater = getMenuInflater(); 
    inflater.inflate(R.menu.main, menu); 
    return super.onCreateOptionsMenu(menu); 
} 


// Called whenever we call invalidateOptionsMenu() 
@Override 
public boolean onPrepareOptionsMenu(Menu menu) { 
    // If the nav drawer is open, hide action items related to the content view 
    boolean drawerOpen = DrawerLayout.isDrawerOpen(DrawerList); 
    menu.findItem(R.id.action_websearch).setVisible(!drawerOpen); 
    return super.onPrepareOptionsMenu(menu); 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // The action bar home/up action should open or close the drawer. 
    // ActionBarDrawerToggle will take care of this. 
    if (DrawerToggle.onOptionsItemSelected(item)) { 
     return true; 
    } 


    // Handle action buttons 
    switch(item.getItemId()) { 
    case R.id.action_websearch: 
     // create intent to perform web search for this planet 
     Intent intent = new Intent(Intent.ACTION_WEB_SEARCH); 
     intent.putExtra(SearchManager.QUERY, getActionBar().getTitle()); 
     // catch event that there's no activity to handle intent 
     if (intent.resolveActivity(getPackageManager()) != null) { 
      startActivity(intent); 
     } else { 
      Toast.makeText(this, R.string.app_not_available, Toast.LENGTH_LONG).show(); 
     } 
     return true; 
    default: 
     return super.onOptionsItemSelected(item); 
    } 
} 



/* 
// Nav Drawer List click 
// The click listener for ListView in the navigation drawer 
@SuppressWarnings("unused") 
private class DrawerItemClickListener implements ListView.OnItemClickListener { 
    @Override 
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
     selectItem(position); 
    } 
} 

private void selectItem(int position) { 

    Fragment newFragment; 
    FragmentTransaction transaction = getFragmentManager().beginTransaction(); 

    switch (position) { 
    case 0: 
     newFragment = new f1(); 
     transaction.replace(R.id.content_frame, newFragment); 
     transaction.addToBackStack(null); 
     transaction.commit(); 
     break; 

    case 1: 
     newFragment = new f2(); 
     transaction.replace(R.id.content_frame, newFragment); 
     transaction.addToBackStack(null); 
     transaction.commit(); 
     break; 

    case 2: 
     newFragment = new f3(); 
     transaction.replace(R.id.content_frame, newFragment); 
     transaction.addToBackStack(null); 
     transaction.commit(); 
     break; 

    case 3: 
     newFragment = new f4(); 
     transaction.replace(R.id.content_frame, newFragment); 
     transaction.addToBackStack(null); 
     transaction.commit(); 
     break; 


    } 
    //DrawerList.setItemChecked(position, true); 
    setTitle(ListTitles[position]); 
    DrawerLayout.closeDrawer(DrawerList); 
} 


@Override 
public void setTitle(CharSequence title) { 
    Title = title; 
    getActionBar().setTitle(Title); 
} 
*/ 
} 

源代碼加載不同片段的主要活動：

public class testfragment extends Fragment { 

ListView DrawerList; 
private String[] ListTitles; 

private List<String> mDataSourceList = new ArrayList<String>(); 
private List<FragmentTransaction> mBackStackList = new ArrayList<FragmentTransaction>(); 

    public static Fragment newInstance(Context context) { 
    testfragment f = new testfragment(); 
    return f; 
} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) { 
    ViewGroup root = (ViewGroup) inflater.inflate(R.layout.activity_testfragment, null); 

    return root; 
} 


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

    //add data to ListView 
    for(int i=0, count=20; i<count; i++){ 
     mDataSourceList.add("record" + i); 
    } 

    ListView listView = (ListView) getActivity().findViewById(R.id.listView1); 
    listView.setAdapter(new ArrayAdapter(getActivity(), android.R.layout.simple_list_item_1, mDataSourceList)); 

} 

public android.app.Fragment commit() { 
    // TODO Auto-generated method stub 
    return null; 
} 

} 

片段2也將類似的代碼，但在列表中有不同的項目。 這兩個碎片都根據位值在抽屜中完美加載。現在當有人點擊抽屜列表項時，我想在主佈局中加載相應的片段。

我的問題是Where &我應該如何爲listview添加onclicklistener，以便在抽屜關閉後在主內容中生成適當的片段？在相應的fragment1/2或主要活動中。

我也有另一種方法來做同樣的事情，只使用man活動中的不同列表。 我能做的是 - 在主要活動中聲明兩個不同的列表視圖以及他們的onclicklistener開關案例。然後我可以使用抽屜中的if-else條件加載這些列表視圖。

對於靈活，結構良好，設計良好的應用程序來說，更好的方法是什麼？

這裏是我的問題的另一部分：Load navigation drawer slider with Dynamic Fragments

Answer 1

你應該爲你的片段接口，然後利用回調方法來提醒活動。以下是您的示例代碼。

public class FirstDrawerFragment extends Fragment { 

    FirstDrawerListener mListener; 

    public interface FirstDrawerListener{ 
     public void onSomeThingHappend(Data youWantToPass); 
    } 

    @Override 
    public void onAttach(Activity activity) { 
     super.onAttach(activity); 

     mListener = (FirstDrawerListener)activity; 

    } 

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

     v.findViewById(R.id.someview).setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       mListener.onSomeThingHappend(data); 
      } 
     }); 
     return super.onCreateView(inflater, container, savedInstanceState); 
    } 
} 

public class SecondDrawerFragment extends Fragment { 

    SecondDrawerListener mListener; 

    public interface SecondDrawerListener{ 
     public void onSomeThingHappendSecond(Data youWantToPass); 
    } 

    @Override 
    public void onAttach(Activity activity) { 
     super.onAttach(activity); 

     mListener = (SecondDrawerListener)activity; 

    } 

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

     v.findViewById(R.id.someview).setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       mListener.onSomeThingHappend(data); 
      } 
     }); 
     return super.onCreateView(inflater, container, savedInstanceState); 
    } 
} 


public class YourActivity extends Activity FirstDrawerListener ,SecondDrawerListner{ 

    @Override 
    public void onSomeThingHappend(Data youWantToPass){ 

     //do your thing and add some fragments 
     //close drawer 
    } 

    @Override 
    public void onSomeThingHappendSecond(Data youWantToPass){ 

     //do yout thing and add some fragments 
     //close drawer 
    } 

} 

希望它適合你！