我对 2.2 版本中 fragment 的兼容性有疑问。我使用“Sherlock Action Bar”来创建操作栏，但我无法创建两个 fragment 。我总是收到这个错误:

 01-07 12:51:56.124: E/AndroidRuntime(475): FATAL EXCEPTION: main 01-07
 12:51:56.124: E/AndroidRuntime(475): java.lang.RuntimeException:
 Unable to start activity
 ComponentInfo{com.example.pruebasherlock_v4/com.example.pruebasherlock_v4.MainActivity}:
 android.view.InflateException: Binary XML file line #7: Error
 inflating class fragment 01-07 12:51:56.124: E/AndroidRuntime(475):
    at
 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 android.app.ActivityThread.access$2300(ActivityThread.java:125) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 android.os.Handler.dispatchMessage(Handler.java:99) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 android.os.Looper.loop(Looper.java:123) 01-07 12:51:56.124:
 E/AndroidRuntime(475):     at
 android.app.ActivityThread.main(ActivityThread.java:4627) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 java.lang.reflect.Method.invokeNative(Native Method) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 java.lang.reflect.Method.invoke(Method.java:521) 01-07 12:51:56.124:
 E/AndroidRuntime(475):     at
 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 dalvik.system.NativeStart.main(Native Method) 01-07 12:51:56.124:
 E/AndroidRuntime(475): Caused by: android.view.InflateException:
 Binary XML file line #7: Error inflating class fragment 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 android.view.LayoutInflater.rInflate(LayoutInflater.java:618) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 android.view.LayoutInflater.inflate(LayoutInflater.java:407) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 android.view.LayoutInflater.inflate(LayoutInflater.java:320) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 android.view.LayoutInflater.inflate(LayoutInflater.java:276) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 android.app.Activity.setContentView(Activity.java:1647) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 com.example.pruebasherlock_v4.MainActivity.onCreate(MainActivity.java:12)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
 01-07 12:51:56.124: E/AndroidRuntime(475):     ... 11 more 01-07
 12:51:56.124: E/AndroidRuntime(475): Caused by:
 java.lang.ClassNotFoundException: android.view.fragment in loader
 dalvik.system.PathClassLoader[/data/app/com.example.pruebasherlock_v4-1.apk]
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 java.lang.ClassLoader.loadClass(ClassLoader.java:573) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 java.lang.ClassLoader.loadClass(ClassLoader.java:532) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 android.view.LayoutInflater.createView(LayoutInflater.java:466) 01-07
 12:51:56.124: E/AndroidRuntime(475):   at
 android.view.LayoutInflater.onCreateView(LayoutInflater.java:544)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66)
 01-07 12:51:56.124: E/AndroidRuntime(475):     at
 android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563)
 01-07 12:51:56.124: E/AndroidRuntime(475):     ... 20 more

我的 main_activity 包含这个:

package com.example.pruebasherlock_v4;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {

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

我的 main.xml 包含这个:

<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=".MainActivity" >

    <fragment 
        android:id="@+id/listaIzq"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="fill_parent" 
        class="com.example.pruebasherlock_v4.Lista"/>

    <fragment 
        android:id="@+id/detallesDer"
        android:layout_weight="3"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        class="com.example.pruebasherlock_v4.Detalle" />


</LinearLayout>

“lista”和“Detalle”类包含以下内容:

list :

package com.example.pruebasherlock_v4;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import com.actionbarsherlock.app.SherlockListFragment;

public class Lista extends SherlockListFragment{
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); 
    }

    @Override
    //se sobreescribe este método como el que siempre "carga" la información a mostrar en el fragment
    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>(this.getActivity(), android.R.layout.simple_list_item_1, values);

        setListAdapter(adapter);
    }

    @Override
    //al hacer tap en algun elemento de la vista, setea el texto del elemento en el nuevo fragment
    public void onListItemClick(ListView l, View v, int position, long id) {
        String item = (String) getListAdapter().getItem(position);
        Detalle fragment = (Detalle) getFragmentManager().findFragmentById(R.id.detallesDer);
        if (fragment != null && fragment.isInLayout()) {
            fragment.setText(item);
        } else {
            /*Intent intent = new Intent(getActivity().getApplicationContext(), DetailActivity.class);
            intent.putExtra("value", item);
            startActivity(intent);*/
        }
    }
}

详细信息:

package com.example.pruebasherlock_v4;

import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.actionbarsherlock.app.SherlockFragment;

public class Detalle extends SherlockFragment {
    @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.detalle, container, false);
        return view;
    }

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

我觉得放了很多代码，但不是因为它是错误的。

非常感谢您的帮助。

最佳答案

My main_activity contains this:

如果您打算使用 ActionBarSherlock，请继承 Sherlock 类，例如 SherlockActivity。如果您也打算使用 fragment ，请继承SherlockFragmentActivity。

引用the ActionBarSherlock documentation :

When creating an activity to use the action bar on all versions of Android, you must declare your activity to extend any of the activity classes that start with 'Sherlock' (e.g., SherlockActivity, SherlockFragmentActivity).

关于android - 操作栏 Sherlock + ListFragments + Fragments，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14200785/