平板电脑上的并排片段

Question

我有一个显示地图的应用程序。当用户按下其中一个操作栏时，会出现另一个listview片段，显示项目列表。

我试图让应用程序在平板电脑上运行时出现在地图左侧的列表视图，但我遇到了困难。

我目前有一个Activity来管理这些片段。

我试过一个解决方案，我发现在StackOverflow但它不起作用。

这里是被用于大型和标准布局的布局XML：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/myFragment" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:orientation="horizontal" > 

<ViewGroup 
    android:id="@+id/leftContainer" 
    android:layout_width="0dp" 
    android:layout_height="fill_parent" 
    android:layout_weight="1" /> 

<ViewGroup 
    android:id="@+id/rightContainer" 
    android:layout_width="0dp" 
    android:layout_height="fill_parent" 
    android:layout_weight="2" /> 

</LinearLayout> 

下面是活动的onCreate代码： super.onCreate（savedInstanceState）; setContentView（R.layout.activity_main）;

FragmentManager fm = getSupportFragmentManager(); 
FragmentTransaction ft = fm.beginTransaction(); 

ft.add(R.id.leftContainer, loadRoutesFragment); 
ft.add(R.id.rightContainer, viewModeFragment); 
ft.hide(loadRoutesFragment); 
ft.commit(); 

我隐藏loadRoutesFragment开始与但当按下按钮，我用show方法，应使片段出现。

上setContentView(R.layout.activity_main); 这里应用崩溃是例外：

01-24 23:25:56.889: E/AndroidRuntime(20746): FATAL EXCEPTION: main 
01-24 23:25:56.889: E/AndroidRuntime(20746): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.srose.cyclopathed/com.srose.cyclopathed.MainActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class android.view.ViewGroup 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.app.ActivityThread.access$600(ActivityThread.java:141) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.os.Handler.dispatchMessage(Handler.java:99) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.os.Looper.loop(Looper.java:137) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.app.ActivityThread.main(ActivityThread.java:5039) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at java.lang.reflect.Method.invokeNative(Native Method) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at java.lang.reflect.Method.invoke(Method.java:511) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at dalvik.system.NativeStart.main(Native Method) 
01-24 23:25:56.889: E/AndroidRuntime(20746): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class android.view.ViewGroup 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.view.LayoutInflater.createView(LayoutInflater.java:613) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:643) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:660) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:685) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.view.LayoutInflater.rInflate(LayoutInflater.java:746) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.view.LayoutInflater.inflate(LayoutInflater.java:489) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at com.actionbarsherlock.internal.ActionBarSherlockNative.setContentView(ActionBarSherlockNative.java:119) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at com.actionbarsherlock.app.SherlockFragmentActivity.setContentView(SherlockFragmentActivity.java:262) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at com.srose.cyclopathed.MainActivity.onCreate(MainActivity.java:90) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.app.Activity.performCreate(Activity.java:5104) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
01-24 23:25:56.889: E/AndroidRuntime(20746): ... 11 more 
01-24 23:25:56.889: E/AndroidRuntime(20746): Caused by: java.lang.InstantiationException: can't instantiate class android.view.ViewGroup 
01-24 23:25:56.889: E/AndroidRuntime(20746): at java.lang.reflect.Constructor.constructNative(Native Method) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at java.lang.reflect.Constructor.newInstance(Constructor.java:417) 
01-24 23:25:56.889: E/AndroidRuntime(20746): at android.view.LayoutInflater.createView(LayoutInflater.java:587) 
01-24 23:25:56.889: E/AndroidRuntime(20746): ... 26 more 

任何人有任何想法，为什么？

感谢

当前XML：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+id/myFragment" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="horizontal" > 

<fragment 
    android:id="@+id/leftContainer" 
    android:layout_width="0dp" 
    android:layout_height="fill_parent" 
    android:layout_weight="1" /> 

<fragment 
    android:id="@+id/rightContainer" 
    android:layout_width="0dp" 
    android:layout_height="fill_parent" 
    android:layout_weight="2" /> 

</LinearLayout> 

Answer 1

的logcat的写着：

Caused by: java.lang.InstantiationException: can't instantiate class android.view.ViewGroup 

这意味着你不能创建在布局通用的ViewGroup。一个常见的替代方法是使用<fragment />元素与name属性中的类，或者您可以使用特定的ViewGroup，如FrameLayout或LinearLayout。开发人员指南fragments中有一些示例。