我开发的一个库和两个应用程序分为申请:1的手机,其他的平板电脑。很多code和布局库中定义,只有少数部分定义的应用程序。
I am developing an application divided in one library and two applications : 1 for phones, the other for tablets. A lot of code and layout is defined in the library, and only a few parts are defined in the applications.
,用 ViewPager
的手机版本(布局和活动定义我使用的片段在活动在图书馆,用于在手机上的应用程序没有变化)。
对于平板电脑的版本,我想告诉我的片段(2)并排,而不是在一个
ViewPager
,所以我试图建立一个这样的XML布局:
I'm using fragments in an Activity
, with a ViewPager
for the phone version (layout and activity defined in the library, used with no change in the phone application).
For the tablet version, I want to show my fragments (2) side by side, and not in a ViewPager
, so I tried to build an XML layout like that :
<....>
<LinearLayout
android:id="@+id/fragmentsParent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<fragment
android:id="@+id/f1"
android:class="com.test.Fragment1"
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="1" />
<fragment
android:id="@+id/f2"
android:name="com.test.Fragment2"
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
</....>
我的问题是,code正在我的手机上的应用程序,而不是在我的平板电脑的应用程序。在这其中,我得到这个异常堆栈:
My problem is that the code is working on my phone application, but not on my tablet application. On this one, I get this exception stack :
07-11 17:41:14.032: E/AndroidRuntime(14754): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1050)
07-11 17:41:14.032: E/AndroidRuntime(14754): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1782)
07-11 17:41:14.032: E/AndroidRuntime(14754): ... 11 more
07-11 17:41:14.032: E/AndroidRuntime(14754): Caused by: java.lang.ClassCastException: com.test.Fragment1 cannot be cast to android.app.Fragment
07-11 17:41:14.032: E/AndroidRuntime(14754): at android.app.Fragment.instantiate(Fragment.java:560)
07-11 17:41:14.032: E/AndroidRuntime(14754): at android.app.Fragment.instantiate(Fragment.java:535)
07-11 17:41:14.032: E/AndroidRuntime(14754): at android.app.Activity.onCreateView(Activity.java:4168)
07-11 17:41:14.032: E/AndroidRuntime(14754): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:664)
该错误消息谈谈 android.app.Fragment
其中,我希望 android.support.v4.app.Fragment
。
在网上搜索后,我检查以下几点:
After searching the web, I checked these points :
在我的活动来延长 android.support.v4.app.FragmentActivity
,
在我的片段延长 android.support.v4.app.Fragment
,
在我的应用程序使用support.v4库。
My activity extends android.support.v4.app.FragmentActivity
,
My fragments extend android.support.v4.app.Fragment
,
My application uses the support.v4 library.
您已经活动由FragmentActivity延长。
Your Activity have to be extended by FragmentActivity.