如何为支持Android 2.2+设备的应用程序的碎片和ActionBar提供支持？

Question

我曾参观过这么多的类似链接这样即1，2随后各种例子/链接，即this one和this one主要是我跟了太多次这个帖子从Vogella，每次我得到相同的异常....可能是什么原因 ？

07-27 12:00:33.431: E/AndroidRuntime(663): FATAL EXCEPTION: main 
07-27 12:00:33.431: E/AndroidRuntime(663): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myexample.fragmentdemoexample/com.myexample.fragmentsupportexample.MainFragmentActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.access$600(ActivityThread.java:123) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.os.Looper.loop(Looper.java:137) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.main(ActivityThread.java:4424) 
07-27 12:00:33.431: E/AndroidRuntime(663): at java.lang.reflect.Method.invokeNative(Native Method) 
07-27 12:00:33.431: E/AndroidRuntime(663): at java.lang.reflect.Method.invoke(Method.java:511) 
07-27 12:00:33.431: E/AndroidRuntime(663): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
07-27 12:00:33.431: E/AndroidRuntime(663): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
07-27 12:00:33.431: E/AndroidRuntime(663): at dalvik.system.NativeStart.main(Native Method) 
07-27 12:00:33.431: E/AndroidRuntime(663): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.rInflate(LayoutInflater.java:739) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 
07-27 12:00:33.431: E/AndroidRuntime(663): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.Activity.setContentView(Activity.java:1835) 
07-27 12:00:33.431: E/AndroidRuntime(663): at com.myexample.fragmentsupportexample.MainFragmentActivity.onCreate(MainFragmentActivity.java:14) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.Activity.performCreate(Activity.java:4465) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920) 
07-27 12:00:33.431: E/AndroidRuntime(663): ... 11 more 
07-27 12:00:33.431: E/AndroidRuntime(663): Caused by: java.lang.ClassCastException: com.myexample.fragmentdemoexample.MyListFragment cannot be cast to android.support.v4.app.Fragment 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.support.v4.app.Fragment.instantiate(Fragment.java:388) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.support.v4.app.Fragment.instantiate(Fragment.java:363) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:264) 
07-27 12:00:33.431: E/AndroidRuntime(663): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:669) 
07-27 12:00:33.431: E/AndroidRuntime(663): ... 21 more 

编辑这里是我的全部代码 // MainActivity

public class MainFragmentActivity extends FragmentActivity { 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main_fragment); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     getMenuInflater().inflate(R.menu.activity_main_fragment, menu); 
     return true; 
    } 

} 

// DetailActivity

public class DetailActivity extends FragmentActivity { 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     // Need to check if Activity has been switched to landscape mode 
     // If yes, finished and go back to the s tart Activity 
     if (getResources().getConfiguration().orientation == 
       Configuration.ORIENTATION_LANDSCAPE) { 
      finish(); 
      return; 
     } 

     setContentView(R.layout.details_activity_layout); 
     Bundle extras = getIntent().getExtras(); 
     if (extras != null) { 
      String s = extras.getString("value"); 
      TextView view = (TextView) findViewById(R.id.detailsText); 
      view.setText(s); 
     } 
    } 
} 

// MyListFragment

public class MyListFragment extends ListFragment { 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

    } 

    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 
     String[] values = new String[] { "Android", "iPhone", "WindowsMobile", "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X", "Linux", 
       "OS/2" }; 
     ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, values); 
     setListAdapter(adapter); 
    } 

    @Override 
    public void onListItemClick(ListView l, View v, int position, long id) { 
     String item = (String) getListAdapter().getItem(position); 
     DetailFragment fragment = (DetailFragment) (getActivity().getSupportFragmentManager()).findFragmentById(R.id.detailFragment); 
     if (fragment != null && fragment.isInLayout()) { 
      fragment.setText(item); 
     } else { 
      Intent intent = new Intent(getActivity().getApplicationContext(), DetailActivity.class); 
      intent.putExtra("value", item); 
      startActivity(intent); 

     } 

    } 
} 

// DetailsFragment

public class DetailFragment extends Fragment { 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     Log.e("Test", "hello"); 
    } 

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

    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     View view = inflater.inflate(R.layout.details, container, false); 
     return view; 
    } 

    public void setText(String item) { 
     TextView view = (TextView) getView().findViewById(R.id.detailsText); 
     view.setText(item); 
    } 
} 

//布局是 //activity_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="horizontal" > 

    <fragment 
     android:id="@+id/listFragment" 
     android:layout_width="150dip" 
     android:layout_height="match_parent" 
     android:layout_marginTop="?android:attr/actionBarSize" 
     class="com.myexample.fragmentdemoexample.MyListFragment" > 
    </fragment> 

    <fragment 
     android:id="@+id/detailFragment" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     class="com.myexample.fragmentdemoexample.DetailFragment" > 

     <!-- Preview: [email protected]/details --> 
    </fragment> 

</LinearLayout> 

//details.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:orientation="vertical" > 

    <TextView 
     android:id="@+id/detailsText" 
     android:layout_width="wrap_content" 
     android:layout_height="match_parent" 
     android:layout_gravity="center_horizontal|center_vertical" 
     android:layout_marginTop="20dip" 
     android:text="Large Text" 
     android:textAppearance="?android:attr/textAppearanceLarge" 
     android:textSize="30dip" /> 

</LinearLayout> 

和布局端口代码类似于作为在Vogella的帖子中提到了适当的修改

Answer 1

所有代码都好看，只是要记住，你有两个xml文件activity_main.xml，其中一个将在layout文件夹中，第二个将在layout-port文件夹中。

对于Vogella的完整演示，请查看此链接项目。

http://www.sendspace.com/file/vdhx6w

Answer 2

这就是我的方式t：

import android.content.Intent; 
import android.os.Bundle; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentTransaction; 
import android.util.Log; 
import android.widget.Button; 
import com.actionbarsherlock.app.ActionBar; 
import com.actionbarsherlock.app.SherlockFragmentActivity; 
import com.actionbarsherlock.view.Menu; 
import com.actionbarsherlock.view.MenuInflater; 
import com.actionbarsherlock.view.MenuItem; 

public class MainPoP extends SherlockFragmentActivity implements ListFragment.OnMainMenuListener{ 
    Button home; 
    Button about; 
    Button donate; 
    Button explore; 
    ActionBar actionbar; 
    ListFragment mainMenu; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); 
     mainMenu = new ListFragment(); 
     ft.add(R.id.mainView, mainMenu).addToBackStack(null).commit(); 
    } 
} 

这是我如何做一个片段，它的工作很好。尝试使用OnCreateView方法来虚增您的片段像这样在其中扩展片段或者是要设置一些布局中的特定片段中的类：

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View v = inflater.inflate(R.layout.about_fragment, container, false); 
    return v; 
}