Question

这个我根本不明白，我试图显示一个没有像这样的标题的自定义对话框

d.setContentView(R.layout.incident_dialog_layout);
d.requestWindowFeature(Window.FEATURE_NO_TITLE);

这样做会给我一个错误

07-25 11:56:23.737: E/AndroidRuntime(15680): android.util.AndroidRuntimeException: requestFeature() must be called before adding content
07-25 11:56:23.737: E/AndroidRuntime(15680):    at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:215)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.app.Dialog.requestWindowFeature(Dialog.java:1031)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at ecm2.android.MainActivity.createNewDialog(MainActivity.java:1121)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at ecm2.android.MainActivity$ListViews.onListItemClick(MainActivity.java:614)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.support.v4.app.ListFragment$2.onItemClick(ListFragment.java:58)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.widget.AdapterView.performItemClick(AdapterView.java:298)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.widget.AbsListView.performItemClick(AbsListView.java:1086)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.widget.AbsListView$PerformClick.run(AbsListView.java:2855)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.widget.AbsListView$1.run(AbsListView.java:3529)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.os.Handler.handleCallback(Handler.java:615)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.os.Handler.dispatchMessage(Handler.java:92)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.os.Looper.loop(Looper.java:137)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at android.app.ActivityThread.main(ActivityThread.java:4745)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at java.lang.reflect.Method.invokeNative(Native Method)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at java.lang.reflect.Method.invoke(Method.java:511)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-25 11:56:23.737: E/AndroidRuntime(15680):    at dalvik.system.NativeStart.main(Native Method)

确定这很简单，只需更改请求的位置即可。所以我然后把它改成这个

d.requestWindowFeature(Window.FEATURE_NO_TITLE);
d.setContentView(R.layout.incident_dialog_layout);

对话框有效，直到我开始新的活动，当我返回并单击创建对话框的项目时出现此错误

07-25 11:51:19.182: E/AndroidRuntime(15376): android.util.AndroidRuntimeException: requestFeature() must be called before adding content
07-25 11:51:19.182: E/AndroidRuntime(15376):    at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:215)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.app.Dialog.requestWindowFeature(Dialog.java:1031)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at ecm2.android.MainActivity.createNewDialog(MainActivity.java:1120)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at ecm2.android.MainActivity$ListViews.onListItemClick(MainActivity.java:614)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.support.v4.app.ListFragment$2.onItemClick(ListFragment.java:58)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.widget.AdapterView.performItemClick(AdapterView.java:298)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.widget.AbsListView.performItemClick(AbsListView.java:1086)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.widget.AbsListView$PerformClick.run(AbsListView.java:2855)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.widget.AbsListView$1.run(AbsListView.java:3529)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.os.Handler.handleCallback(Handler.java:615)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.os.Handler.dispatchMessage(Handler.java:92)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.os.Looper.loop(Looper.java:137)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at android.app.ActivityThread.main(ActivityThread.java:4745)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at java.lang.reflect.Method.invokeNative(Native Method)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at java.lang.reflect.Method.invoke(Method.java:511)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
07-25 11:51:19.182: E/AndroidRuntime(15376):    at dalvik.system.NativeStart.main(Native Method)

那么它是什么让我这么做呢，因为我在设置内容之后无法拥有它我可以在发送内容之前使用它?????

Answer 1

您收到该错误是因为第二次设置对话框布局（也就是说，当您从第二个活动回来时），您的屏幕中已有内容。

因此，第二次调用requestWindowFeature会导致错误。

您必须将该语句移动到onCreate（）方法，因此只有一次被称为requestFeature，确保在调用之前不会添加任何内容。

Answer 2

根据对该问题的第二条评论，我猜你是在onStart或onResume方法中调用requestFeature（）。

requestCoature以及setContentView应该在onCreate（）中调用。如果您在其他任何地方执行此操作，它将再次被调用并导致您的应用程序抛出错误。

必须在添加错误之前调用requestFeature（）

2 个答案: