requestFeature()必须在super.onCreate添加内容错误之前被称为 [英] requestFeature() must be called before adding content error on super.onCreate
问题描述
我有一个抽象类,延长 ActionBarActivity
。在的onCreate
,我有:
@覆盖
保护无效的onCreate(包savedInstanceState){
super.onCreate(savedInstanceState);
supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
...
}
应用程序崩溃是由于内容错误,然后requestFeature(),专门就行 super.onCreate(savedInstanceState)
。阅读一些类似的帖子后,我想出了这个解决方案:
@覆盖
保护无效的onCreate(包savedInstanceState){
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
super.onCreate(savedInstanceState);
...
}
我的问题是:为什么它会崩溃的超级电话吗?另外,我不是 settingContentView
在扩展此类直到后,我拨打类 super.onCreate
。它仍然偶尔会崩溃。
了java.lang.RuntimeException:无法启动活动ComponentInfo {com.myapp / com.myapp.cycle.Cycle}:android.util.AndroidRuntimeException:requestFeature()之前必须调用添加内容
在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2351)
在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
在android.app.ActivityThread.access $ 600(ActivityThread.java:151)
在android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1331)
在android.os.Handler.dispatchMessage(Handler.java:99)
在android.os.Looper.loop(Looper.java:155)
在android.app.ActivityThread.main(ActivityThread.java:5454)
在java.lang.reflect.Method.invokeNative(本机方法)
在java.lang.reflect.Method.invoke(Method.java:511)
在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:1029)
在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:796)
在dalvik.system.NativeStart.main(本机方法)
android.util.AndroidRuntimeException:产生的原因requestFeature()必须添加内容之前调用
在com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:320)
在android.app.Activity.requestWindowFeature(Activity.java:3283)
在android.support.v7.app.ActionBarActivityDelegateICS.onCreate(ActionBarActivityDelegateICS.java:63)
在android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:98)
在com.myapp.core.activity.MyActivity.onCreate(MyActivity.java:83)
在com.myapp.cycle.Cycle.onCreate(Cycle.java:55)
在android.app.Activity.performCreate(Activity.java:5066)
在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1101)
在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2307)
... 11更多
由于 android.support.v7.app.ActionBarActivity
通过添加动作条改变窗口的内容。< BR>
请看看在code开头
@覆盖
保护无效的onCreate(包savedInstanceState){
mImpl = ActionBarActivityDelegate.createDelegate(本);
super.onCreate(savedInstanceState);
mImpl.onCreate(savedInstanceState);
}
和停留在<一href="https://android.googlesource.com/platform/frameworks/support/+/master/v7/appcompat/src/android/support/v7/app/ActionBarActivity.java">https://android.googlesource.com/platform/frameworks/support/+/master/v7/appcompat/src/android/support/v7/app/ActionBarActivity.java了解详细信息。
什么样的 FEATURE_INDETERMINATE_PROGRESS
看起来像依赖于动作条是否为present与否。因此,需要超级调用之前设置。
I have an abstract class extending ActionBarActivity
. In the onCreate
, I have:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
...
}
The app crashes due to the requestFeature() before content error, specifically on the line super.onCreate(savedInstanceState)
. After reading some of the similar posts, I came up with this solution:
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
super.onCreate(savedInstanceState);
...
}
My question is: Why does it crash on the super call? Also, I'm not settingContentView
in the classes that extend this class until AFTER I call super.onCreate
. It's still occasionally crashing.
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp/com.myapp.cycle.Cycle}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2351)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$600(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1331)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:155)
at android.app.ActivityThread.main(ActivityThread.java:5454)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1029)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:796)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:320)
at android.app.Activity.requestWindowFeature(Activity.java:3283)
at android.support.v7.app.ActionBarActivityDelegateICS.onCreate(ActionBarActivityDelegateICS.java:63)
at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:98)
at com.myapp.core.activity.MyActivity.onCreate(MyActivity.java:83)
at com.myapp.cycle.Cycle.onCreate(Cycle.java:55)
at android.app.Activity.performCreate(Activity.java:5066)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1101)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2307)
... 11 more
Because android.support.v7.app.ActionBarActivity
alters the window content by adding an ActionBar.
Please take a look at the code starting with
@Override
protected void onCreate(Bundle savedInstanceState) {
mImpl = ActionBarActivityDelegate.createDelegate(this);
super.onCreate(savedInstanceState);
mImpl.onCreate(savedInstanceState);
}
and on at https://android.googlesource.com/platform/frameworks/support/+/master/v7/appcompat/src/android/support/v7/app/ActionBarActivity.java for details.
And what the FEATURE_INDETERMINATE_PROGRESS
looks like depends on whether an ActionBar is present or not. So that needs to be set before the super call.
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