Question

修改反映matias's条评论

实际上，最初我的代码中没有supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);或requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);，直到我注意到runtime exception when below combinations of actions happened

用户按下主页按钮以最小化应用程序并尝试从最近的应用（长按主页按钮）恢复应用

发生屏幕旋转时（注意：清单没有 configChange 声明）

然后我认为在初始化期间显示不确定的进度条应该导致问题，所以只有我尝试调用request*方法，认为它会清除它，但没有发生任何事情..

最后，为了测试，我删除了showPdIndeterminate();。因此，在我的代码中我无处可见。在上述情况下仍然会发生同样的情况

我有一个基于ActionBarActivity的片段，我的布局包含在DrawerLayout内two framelayouts，以容纳两个frgaments。

我尝试了requestFeature() must be called before adding content error on super.onCreate，但

仍然是同样的例外

@Override
protected void onCreate(Bundle savedInstanceState) {
    Log.e(TAG, "Inside OnCreate");
    // supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    showPdIndeterminate();
           ....
}

和showPdIndeterminate()是

private void showPdIndeterminate() {
    pd = ProgressDialog.show(this, "Initializing", "Pls wait...");
    pd.setIndeterminate(true);
    pd.show();
}

如果我尝试NullPointerException，我会收到supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);，所以只评论了它。

错误日志是：

06-16 04:04:57.280: D/AndroidRuntime(27280): Shutting down VM
06-16 04:04:57.280: W/dalvikvm(27280): threadid=1: thread exiting with uncaught exception (group=0x413592a0)
06-16 04:04:57.285: E/AndroidRuntime(27280): FATAL EXCEPTION: main
06-16 04:04:57.285: E/AndroidRuntime(27280): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.demo/com.example.demo.MainActivity}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3553)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.ActivityThread.access$700(ActivityThread.java:140)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1233)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.os.Looper.loop(Looper.java:137)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.ActivityThread.main(ActivityThread.java:4898)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at java.lang.reflect.Method.invokeNative(Native Method)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at java.lang.reflect.Method.invoke(Method.java:511)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at dalvik.system.NativeStart.main(Native Method)
06-16 04:04:57.285: E/AndroidRuntime(27280): Caused by: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
06-16 04:04:57.285: E/AndroidRuntime(27280):    at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:267)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.Activity.requestWindowFeature(Activity.java:3320)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.support.v7.app.ActionBarActivityDelegateICS.onCreate(ActionBarActivityDelegateICS.java:63)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:98)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at com.example.demo.MainActivity.onCreate(MainActivity.java:464)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.Activity.performCreate(Activity.java:5206)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083)
06-16 04:04:57.285: E/AndroidRuntime(27280):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064)
06-16 04:04:57.285: E/AndroidRuntime(27280):    ... 12 more

注意：我在方向更改时以及通过按主页按钮

从最近的应用程序列表启动它时会收到此异常

此异常** **最终**无法在片段的setRetainInstance(true); onCreate（）中<{1}}（

为什么会这样？怎么解决？

Answer 1

在您的Activity中覆盖setContentView，并查看调用该方法的位置/内容。一旦你发现了什么叫它，我相信我们可以找到一个可行的解决方案。

@Override
public void setContentView (int layoutResID)
{
  //Set a break point on the next line or log out a message. 
  super.setContentView(layoutResID);
}

Answer 2

android.support.v7.app.ActionBarActivity通过添加ActionBar来更改窗口内容。此外，FEATURE_INDETERMINATE_PROGRESS取决于是否存在操作栏。

尝试这样的事情：

@Override
protected void onCreate(Bundle savedInstanceState) {
   ABD = ActionBarActivityDelegate.createDelegate(this);
   super.onCreate(savedInstanceState);
   ABD.onCreate(savedInstanceState);
}

可以找到ActionBarActivityDelegate课程here。

最后，如果可能，您应该考虑锁定屏幕方向。详细描述了here。

Answer 3

尝试在requestWindowFeature()之前调用setcontentView()，但在onCreate()之后调用。

适合我。

必须在添加内容之前调用ActionBarActivity requestFeature

3 个答案: