1

启动具有片段的活动时，我不断收到该错误。

这是我的代码的概述：

家庭活动从启动屏幕活动开始

home.xml (每个片段有 50% layout_weight)

<LinearLayout>
    <fragment android:name="com.example.test.FragmentClass1" ...>
    <fragment android:name="com.example.test.FragmentClass2" ...>
</LinearLayout>

片段1.xml

<LinearLayout>
    //some EditTexts and Buttons here
<LinearLayout>

片段2.xml

<LinearLayout>
    <ListView ... />
</LinearLayout>

FragmentClass1.java

public class FragmentClass1 extends Fragment{
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View view = inflater.inflate(R.layout.fragment1, container, false);
        return view;
    }
}

片段类2.java

public class FragmentClass2 extends ListFragment{
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        View view = inflater.inflate(R.layout.fragment2, container, false);
        return view;
    }
}

主页.java

public class Home extends Activity{
    public View onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.home);
        //still empty
    }
}

错误日志是这样的：

12-09 20:39:00.317: E/AndroidRuntime(18214): FATAL EXCEPTION: main
12-09 20:39:00.317: E/AndroidRuntime(18214): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test/com.example.test.Home}: android.view.InflateException: Binary XML file line #10: Error inflating class fragment
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.ActivityThread.access$600(ActivityThread.java:141)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.os.Handler.dispatchMessage(Handler.java:99)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.os.Looper.loop(Looper.java:137)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.ActivityThread.main(ActivityThread.java:5039)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at java.lang.reflect.Method.invokeNative(Native Method)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at java.lang.reflect.Method.invoke(Method.java:511)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at dalvik.system.NativeStart.main(Native Method)
12-09 20:39:00.317: E/AndroidRuntime(18214): Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class fragment
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.Activity.setContentView(Activity.java:1881)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at com.example.test.Home.onCreate(Home.java:16)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.Activity.performCreate(Activity.java:5104)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
12-09 20:39:00.317: E/AndroidRuntime(18214):    ... 11 more
12-09 20:39:00.317: E/AndroidRuntime(18214): Caused by: java.lang.ClassCastException: com.example.test.Fragment1 cannot be cast to android.app.Fragment
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.Fragment.instantiate(Fragment.java:585)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.Fragment.instantiate(Fragment.java:560)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.app.Activity.onCreateView(Activity.java:4709)
12-09 20:39:00.317: E/AndroidRuntime(18214):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
12-09 20:39:00.317: E/AndroidRuntime(18214):    ... 21 more

有什么解决办法吗？谢谢

4

3 回答 3

5

如果您尝试使用 Android Support 包的片段的反向移植，您需要让您的活动继承自FragmentActivity（或从其他继承自的东西FragmentActivity，例如SherlockFragmentActivity）。

更新

堆栈跟踪的关键行是：

12-09 20:39:00.317: E/AndroidRuntime(18214): Caused by: java.lang.ClassCastException: com.example.test.Fragment1 cannot be cast to android.app.Fragment

现在，您提供的源代码中没有任何名为com.example.test.Fragment1. 如果这确实是您在列表中所拥有的com.example.test.FragmentClass1，那么Fragment您所继承的可能不是android.app.Fragment。在这种情况下，最有可能的是android.support.v4.app.Fragment——Fragment来自 backport 的类。如果是这种情况，请更改导入语句（以及其余代码库中的任何其他有缺陷的语句）。

于 2012-12-09T12:56:04.107 回答
0

你必须写

super.onCreateView(inflater, container, savedInstanceState);

在您的 onCreateView 方法中。

于 2013-03-08T14:09:59.437 回答
0

我有这个问题。我通过在清单中添加以下行来修复它。

<meta-data android:name="com.google.android.gms.version"
       android:value="@integer/google_play_services_version"/>
于 2014-01-01T16:27:52.000 回答