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ActionBarCompat和requestWindowFeature的使用

androidandroid-actionbar-compat
6

到目前为止，我从ActionBarSherlock切换到ActionBarCompat没有遇到大问题。在我的Nexus 4上运行得非常好。但是当我开始在运行2.3.6的旧款Nexus One上进行测试时，在旋转设备时遇到了一个问题。我请求在ActionBar中显示中间进度的窗口特性：

@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());

}

这在Jelly Bean上效果很好。

在2.3.6上会得到以下堆栈跟踪：

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

有人知道如何解决这个问题吗？

问候

4个回答
12
0
错误日志清楚地指出“必须在添加内容之前调用requestFeature()”。因此，在调用'requestWindowFeature'之后，您必须调用'super.onCreate(savedInstanceState);'。并且不需要像上面提到的那样调用supportRequestWindowFeature(Window.FEATURE_...)。请参见下面的工作代码。
  @Override
    public void onCreate(Bundle savedInstanceState) {
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        requestWindowFeature(Window.FEATURE_PROGRESS);
        super.onCreate(savedInstanceState);
0
对于那些没有调用requestWindowFeature()方法但仍然遇到异常的人，请尝试这个解决方法：
@Override
protected void onCreate(Bundle savedInstanceState) {
    try {
        super.onCreate(savedInstanceState);
    } catch (Throwable e) {
        //dummy workaround
    }
    setContentView(getLayoutResId());

请查看https://code.google.com/p/android/issues/detail?id=60841

0

使用 supportRequestWindowFeature(WindowCompat.FEATURE_xxx)

即，为了向后兼容性，您还需要使用 WindowCompat.FEATURE_xxx 而不是 Window.FEATURE_xxx。

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