到目前为止,我从ActionBarSherlock转移到ActionBarCompat没有更大的问题.在我的Nexus 4上,它的效果非常好.当我开始测试运行2.3.6的旧版Nexus One时,我在旋转设备时遇到了问题.我请求一个Window功能来显示ActionBar中的中间进度：
@Override
protected void onCreate(final Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(android.view.Window.FEATURE_PROGRESS);
requestWindowFeature(android.view.Window.FEATURE_INDETERMINATE_PROGRESS);
setupActionBar(getSupportActionBar());
}
这对果冻豆很有效.
在2.3.6上获取此Stack Trace：
08-12 13:34:09.242: E/AndroidRuntime(4602): FATAL EXCEPTION: main
08-12 13:34:09.242: E/AndroidRuntime(4602): java.lang.RuntimeException: Unable to start activity ComponentInfo{net.app.packagename/net.app.fragment.CustomActivity}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:2832)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.app.ActivityThread.access$1600(ActivityThread.java:117)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.os.Handler.dispatchMessage(Handler.java:99)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.os.Looper.loop(Looper.java:130)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.app.ActivityThread.main(ActivityThread.java:3683)
08-12 13:34:09.242: E/AndroidRuntime(4602): at java.lang.reflect.Method.invokeNative(Native Method)
08-12 13:34:09.242: E/AndroidRuntime(4602): at java.lang.reflect.Method.invoke(Method.java:507)
08-12 13:34:09.242: E/AndroidRuntime(4602): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-12 13:34:09.242: E/AndroidRuntime(4602): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-12 13:34:09.242: E/AndroidRuntime(4602): at dalvik.system.NativeStart.main(Native Method)
08-12 13:34:09.242: E/AndroidRuntime(4602): Caused by: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
08-12 13:34:09.242: E/AndroidRuntime(4602): at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:181)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.app.Activity.requestWindowFeature(Activity.java:2729)
08-12 13:34:09.242: E/AndroidRuntime(4602): at net.app.fragment.BaseFragmentActivity.onCreate(BaseFragmentActivity.java:50)
08-12 13:34:09.242: E/AndroidRuntime(4602): at net.app.fragment.CustomActivity.onCreate(CustomActivity.java:55)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-12 13:34:09.242: E/AndroidRuntime(4602): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
08-12 13:34:09.242: E/AndroidRuntime(4602): ... 12 more
08-12 13:34:12.092: I/Process(4602): Sending signal. PID: 4602 SIG: 9
谁知道如何解决这个问题？
问候
解决方法
调用supportRequestWindowFeature(Window.FEATURE _…).
见http://android-developers.blogspot.com/2013/08/actionbarcompat-and-io-2013-app-source.html
