Question

我的andorid应用程序在大多数情况下工作正常，但有时在手机旋转时崩溃，我得到下面的错误日志，我不明白。任何人都可以解释为什么会这样吗？

以下是错误日志：

02-22 14:44:52.175: D/AndroidRuntime(26784): Shutting down VM
02-22 14:44:52.175: W/dalvikvm(26784): threadid=1: thread exiting with uncaught exception (group=0x40e81300)
02-22 14:44:52.183: E/AndroidRuntime(26784): FATAL EXCEPTION: main
02-22 14:44:52.183: E/AndroidRuntime(26784): java.lang.IllegalArgumentException: View not attached to window manager
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:653)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:349)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.view.WindowManagerImpl$CompatModeWrapper.removeView(WindowManagerImpl.java:160)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.app.Dialog.dismissDialog(Dialog.java:319)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.app.Dialog.dismiss(Dialog.java:302)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at com.example.chartviewer.JsonActivity$getChartItems.onPostExecute(JsonActivity.java:267)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at com.example.chartviewer.JsonActivity$getChartItems.onPostExecute(JsonActivity.java:1)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.os.AsyncTask.finish(AsyncTask.java:631)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.os.AsyncTask.access$600(AsyncTask.java:177)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:644)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.os.Handler.dispatchMessage(Handler.java:99)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.os.Looper.loop(Looper.java:137)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at android.app.ActivityThread.main(ActivityThread.java:4745)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at java.lang.reflect.Method.invokeNative(Native Method)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at java.lang.reflect.Method.invoke(Method.java:511)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
02-22 14:44:52.183: E/AndroidRuntime(26784):    at dalvik.system.NativeStart.main(Native Method)

更新

以下是onPostExecuteMethod的代码：

//在获取数据时删除进度对话框

        protected void onPostExecute(String args) {
            progressDialog.dismiss();

            //Shows alert dialog if data is unavailable
            if(args != null && args.equals(noData)){

                 AlertDialog.Builder builder = new AlertDialog.Builder(JsonActivity.this);
                 builder.setIcon(R.drawable.artistlogo);
                 builder.setTitle("Musicmetric Charts");
                 builder.setMessage(noData);
                 builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
                    @Override
                    public void onCancel(DialogInterface dialog) {
                        // finishes the activity and leads back to the list of charts 
                        JsonActivity.this.finish();

                    }

                });

                 AlertDialog alert = builder.create();
                 alert.show();

            }



        }

Answer 1

这些是您的堆栈跟踪中的两个相关行：

com.example.chartviewer.JsonActivity$getChartItems.onPostExecute(JsonActivity.java:267)

您已经实现了AsyncTask的onPostExcecute方法。此方法正在关闭对话框：

android.app.Dialog.dismiss(Dialog.java:302)

当您旋转设备时，AsyncTask继续运行并尝试隐藏不再可见的对话框。

Answer 2

扩展ashtom的答案：尝试自己维持设备轮换：

    @Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
if(newConfig.equals(Configuration.ORIENTATION_LANDSCAPE)){
        // TODO
    }else if (newConfig.equals(Configuration.ORIENTATION_PORTRAIT)){
        // TODO
    }
}

由于Window Manager，应用程序在旋转手机时崩溃

2 个答案: