编辑反映matias's
评论
实际上,最初我没有supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
或requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
在我的代码中,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程序中恢复它(这是长按主页按钮)
当屏幕旋转发生时(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是导致问题的原因,所以只有我尝试调用request*
方法,认为它会清除它,但什么也没发生..
showPdIndeterminate();
最后我为了测试而删除了。因此,在我的代码中没有任何地方显示它。在上述情况下仍然会发生同样的情况
我有一个基于片段ActionBarActivity
,我的布局被包裹在里面DrawerLayout
以two framelayouts
容纳两个片段。
我尝试在 super.onCreate 上添加内容错误之前必须调用 requestFeature()但仍然存在相同的异常
@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();
....
}
并且showPdIndeterminate()
是
private void showPdIndeterminate() {
pd = ProgressDialog.show(this, "Initializing", "Pls wait...");
pd.setIndeterminate(true);
pd.show();
}
NullPointerException
如果我尝试,我会得到supportRequestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
,所以只评论它。
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:我在方向更改以及通过按主页按钮从最近的应用程序列表启动它时收到此异常
setRetainInstance(true);
这个异常是**最终**出现的,不管片段的onActivityCreated() or
onCreate()中有(没有 )
为什么会这样?如何解决?