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我通过 Acra 收到了 Android 应用程序的错误报告。在堆栈跟踪中我的代码中没有对行号的引用。我怎么知道问题出在我的代码上？谁能帮助我。

堆栈跟踪：

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.itse.htsurvey/com.itse.htsurvey.Question2Page2Activity}: java.lang.ClassCastException: android.widget.CompoundButton$SavedState cannot be cast to android.widget.AbsSpinner$SavedState
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1815)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3188)
        at android.app.ActivityThread.access$600(ActivityThread.java:122)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1028)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:132)
        at android.app.ActivityThread.main(ActivityThread.java:4123)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:491)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
        at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassCastException: android.widget.CompoundButton$SavedState cannot be cast to android.widget.AbsSpinner$SavedState
        at android.widget.AbsSpinner.onRestoreInstanceState(AbsSpinner.java:421)
        at android.view.View.dispatchRestoreInstanceState(View.java:8316)
        at android.view.ViewGroup.dispatchThawSelfOnly(ViewGroup.java:2038)
        at android.widget.AdapterView.dispatchRestoreInstanceState(AdapterView.java:766)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.View.restoreHierarchyState(View.java:8295)
        at com.android.internal.policy.impl.PhoneWindow.restoreHierarchyState(PhoneWindow.java:1489)
        at android.app.Activity.onRestoreInstanceState(Activity.java:898)
        at android.app.Activity.performRestoreInstanceState(Activity.java:870)
        at android.app.Instrumentation.callActivityOnRestoreInstanceState(Instrumentation.java:1099)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1793)
        ... 12 more
java.lang.ClassCastException: android.widget.CompoundButton$SavedState cannot be cast to android.widget.AbsSpinner$SavedState
        at android.widget.AbsSpinner.onRestoreInstanceState(AbsSpinner.java:421)
        at android.view.View.dispatchRestoreInstanceState(View.java:8316)
        at android.view.ViewGroup.dispatchThawSelfOnly(ViewGroup.java:2038)
        at android.widget.AdapterView.dispatchRestoreInstanceState(AdapterView.java:766)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:2024)
        at android.view.View.restoreHierarchyState(View.java:8295)
        at com.android.internal.policy.impl.PhoneWindow.restoreHierarchyState(PhoneWindow.java:1489)
        at android.app.Activity.onRestoreInstanceState(Activity.java:898)
        at android.app.Activity.performRestoreInstanceState(Activity.java:870)
        at android.app.Instrumentation.callActivityOnRestoreInstanceState(Instrumentation.java:1099)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1793)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3188)
        at android.app.ActivityThread.access$600(ActivityThread.java:122)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1028)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:132)
        at android.app.ActivityThread.main(ActivityThread.java:4123)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:491)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
        at dalvik.system.NativeStart.main(Native Method)

我的代码 com.itse.htsurvey.Question2Page2Activity：http ://pastebin.com/gPYyZ0GH

编辑 1：更多信息 - 我认为这可能是因为小部件 ID 冲突。savedState 部分表示这发生在 Activity 重新创建之后？此布局由动态添加的视图/布局组成，它们在运行时被赋予 id。

编辑2：只是为了确认在所有测试中，这是我第一次收到这个错误。我无法重现它。

编辑 3：当我更改设备的方向时，我能够重现该错误。那我该如何解决这个问题？

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4 回答 4

3

在阅读了 onSaveInstanceState 和 onRestoreInstanceState 之后。我添加了以下代码。我已经保存了所有视图的状态，因此不需要 onSaveInstanceState 和 onRestoreInstanceStat 的默认实现。

@Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
        saveEnteredData();  
    }

    @Override
    public void onRestoreInstanceState(Bundle savedInstanceState) {

    }
于 2012-08-29T10:11:58.157 回答
2

令人困惑的一件事是，在代码中，您似乎是通过原始 id int 引用视图。我实际上并不完全确定您的代码做了什么，但是...这可能会很混乱并导致 Android 找到错误的视图（也许这就是为什么您会收到有关您甚至没有使用的视图的一些错误的错误，如 AbsSpinner）。例如，代码使用：

CheckBox cb1 = (CheckBox) ll2_8.getChildAt(i).findViewById(R.id.tl1).findViewById(R.id.tr1).findViewById(i);

因此，您的最后一个“findViewById(i)”应该引用通过引用生成的东西，就像您对“findViewById(R.id.tr1)”所做的那样，而不是这样做。

要验证，请删除 Eclipse 中“gen”文件夹中的 R.java，清理项目，构建项目，然后查看是否可以重现错误。你的应用应该（？）崩溃

于 2012-08-28T08:32:56.633 回答
0

看起来您不能将复合按钮投射到 Spinner。您只能将复合按钮用作 CheckBox、RadioButton、Switch、ToggleButton，但不能用作 Spinner。

于 2012-08-28T08:17:34.910 回答
0

您正在尝试使用

android.widget.CompoundButton$SavedState

对象而不是

android.widget.AbsSpinner$SavedState。

只需尝试检查导入的类是否正确导入了适当的类。

于 2012-08-28T08:17:59.570 回答