当我点击保存按钮时，AsyncTask中发生错误？

现在我正在开发android照片graphy应用程序，因为我想使用AsyncTask.for保存imge，第一次我想使用onPreExecute（）显示该iam的进度对话框，并且叠加图像将在doInBackground（）中执行，并且我想要保存图像，我会写调用save（）上onPostExecute（），但是当点击保存按钮，它得到强制关闭错误说...当我点击保存按钮时，AsyncTask中发生错误？

This is my logcat file 
    11-17 12:33:56.689: E/AndroidRuntime(8753): FATAL EXCEPTION: AsyncTask #1 
    11-17 12:33:56.689: E/AndroidRuntime(8753): java.lang.RuntimeException: An error occured while executing doInBackground() 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.os.AsyncTask$3.done(AsyncTask.java:200) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask.setException(FutureTask.java:125) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask.run(FutureTask.java:138) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.lang.Thread.run(Thread.java:1019) 
    11-17 12:33:56.689: E/AndroidRuntime(8753): Caused by: android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.ViewRoot.checkThread(ViewRoot.java:3035) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.ViewRoot.requestLayout(ViewRoot.java:636) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.widget.RelativeLayout.requestLayout(RelativeLayout.java:257) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.widget.ImageView.setImageDrawable(ImageView.java:322) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.widget.ImageView.setImageBitmap(ImageView.java:336) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at com.outthinking.instatext.share.apllyEffect(share.java:145) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at com.outthinking.instatext.share.access$0(share.java:122) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at com.outthinking.instatext.share$AsyncClass.doInBackground(share.java:106) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at com.outthinking.instatext.share$AsyncClass.doInBackground(share.java:1) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.os.AsyncTask$2.call(AsyncTask.java:185) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  ... 4 more 
    11-17 12:33:56.689: E/AndroidRuntime(8753): [Blue Error Handler] Make Debugging Report file for AsyncTask #1 
    11-17 12:33:56.689: E/AndroidRuntime(8753): java.lang.RuntimeException: An error occured while executing doInBackground() 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.os.AsyncTask$3.done(AsyncTask.java:200) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask.setException(FutureTask.java:125) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask.run(FutureTask.java:138) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.lang.Thread.run(Thread.java:1019) 
    11-17 12:33:56.689: E/AndroidRuntime(8753): Caused by: android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.ViewRoot.checkThread(ViewRoot.java:3035) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.ViewRoot.requestLayout(ViewRoot.java:636) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.widget.RelativeLayout.requestLayout(RelativeLayout.java:257) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.view.View.requestLayout(View.java:8267) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.widget.ImageView.setImageDrawable(ImageView.java:322) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.widget.ImageView.setImageBitmap(ImageView.java:336) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at com.outthinking.instatext.share.apllyEffect(share.java:145) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at com.outthinking.instatext.share.access$0(share.java:122) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at com.outthinking.instatext.share$AsyncClass.doInBackground(share.java:106) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at com.outthinking.instatext.share$AsyncClass.doInBackground(share.java:1) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at android.os.AsyncTask$2.call(AsyncTask.java:185) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306) 
    11-17 12:33:56.689: E/AndroidRuntime(8753):  ... 4 more 
    11-17 12:33:57.279: E/WindowManager(8753): [WindowManagerImpl.java:290:closeAll()] Activity com.outthinking.instatext.share has leaked window [email protected] that was originally added here 
    11-17 12:33:57.279: E/WindowManager(8753): android.view.WindowLeaked: Activity com.outthinking.instatext.share has leaked window [email protected] that was originally added here 
    11-17 12:33:57.279: E/WindowManager(8753): at android.view.ViewRoot.<init>(ViewRoot.java:265) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.view.Window$LocalWindowManager.addView(Window.java:424) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.app.Dialog.show(Dialog.java:241) 
    11-17 12:33:57.279: E/WindowManager(8753): at com.outthinking.instatext.share$AsyncClass.onPreExecute(share.java:96) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.os.AsyncTask.execute(AsyncTask.java:391) 
    11-17 12:33:57.279: E/WindowManager(8753): at com.outthinking.instatext.share.onClick(share.java:182) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.view.View.performClick(View.java:2485) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.view.View$PerformClick.run(View.java:9080) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.os.Handler.handleCallback(Handler.java:587) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.os.Handler.dispatchMessage(Handler.java:92) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.os.Looper.loop(Looper.java:130) 
    11-17 12:33:57.279: E/WindowManager(8753): at android.app.ActivityThread.main(ActivityThread.java:3737) 
    11-17 12:33:57.279: E/WindowManager(8753): at java.lang.reflect.Method.invokeNative(Native Method) 
    11-17 12:33:57.279: E/WindowManager(8753): at java.lang.reflect.Method.invoke(Method.java:507) 
    11-17 12:33:57.279: E/WindowManager(8753): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:894) 
    11-17 12:33:57.279: E/WindowManager(8753): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:652) 
    11-17 12:33:57.279: E/WindowManager(8753): at dalvik.system.NativeStart.main(Native Method)

这是我的代码：

public class AsyncClass extends AsyncTask<Void, String, Bitmap> { 
        private Context context; 
        ProgressDialog dialog; 

         public AsyncClass(Context cxt) { 
          context = cxt; 
          dialog = new ProgressDialog(context); 
         } 

         @Override 
         protected void onPreExecute() { 
          dialog.setTitle("Please wait save the image..."); 
          dialog.show(); 
         } 

         @Override 


         protected Bitmap doInBackground(Void... unused) { 


          //Bitmap original = getResizedBitmap(ImageViewShow.bitmap_img, sharewidth,shareheight); 
          Bitmap bmp1 = apllyEffect(); 
          //if() 
          return bmp1; 
         } 





         @Override 
         protected void onPostExecute(Bitmap bmp) { 
          String fieName = UUID.randomUUID().toString(); 
          SaveImage(fieName, 100,bmp); 
          dialog.dismiss(); 
         } 
        } 
    and save code is... 
    private Bitmap apllyEffect() { 
        if(second.frame_bitmap==null) 
        { 
         second.theam_bitmap = BitmapFactory.decodeResource(getResources(), second.current_theam); 

        second.bmOverlay = Bitmap.createBitmap(second.canvas.getWidth(), second.canvas.getHeight(), second.theam_bitmap.getConfig()); 
         second.canvas = new Canvas(second.bmOverlay); 

         second.canvas.setBitmap(second.bmOverlay); 
         second.canvas.drawBitmap(second.theam_bitmap, new Matrix(), null); 
         Typeface typeface=stylesapply(second.typefacevalue); 
         share_tv.setTypeface(typeface); 
         share_tv.setTextColor(second.current_color); 
         share_img.setImageBitmap(second.bmOverlay); 
        }else{ 
        second.theam_bitmap= BitmapFactory.decodeResource(getResources(), second.current_theam); 
        second.frame_bitmap = BitmapFactory.decodeResource(getResources(), second.current_frame); 
        second.bmOverlay = Bitmap.createBitmap(second.canvas.getWidth(), second.canvas.getHeight(), second.theam_bitmap.getConfig()); 
        second.canvas = new Canvas(second.bmOverlay); 
        second.canvas.setBitmap(second.bmOverlay); 
        second.canvas.drawBitmap(second.theam_bitmap, new Matrix(), null); 
        second.canvas.drawBitmap(second.frame_bitmap, new Matrix(), null); 
        share_tv.setTextColor(second.current_color); 
        share_img.setImageBitmap(second.bmOverlay); 
        } 
        return second.bmOverlay; 
       }

来源

2012-11-20 VR.Naresh

你点击保存时，在后台进程 –

-doInBackground()方法用于执行在非UI线程上的非UI工作和onPost()在专用UI线程上执行UI工作的方法。

-我认为你正试图在doInBackground()方法执行UI工作，并且那导致它的失败。

来源

2012-11-20 05:33:29

它看起来像你试图从你的ASyncTask做UI操作。您应该只执行onPreExecute，onPostExecute和onProgressUpdate之间的UI操作。在doInBackground中，您不应该直接访问UI元素。

检查你的代码share.java在行106的呼唤东西线145 ...

当你

share_img.setImageBitmap(...)

这绝对是UI操作...你应该某处动议其他。也都在share_tv

无论是操作使用onProgressUpdate，如果只是在doInBackground结束时，你可以把它移到onPostExecute。否则，您也可以使用runOnUiThread

来源

2012-11-20 05:33:41 Matthieu

您只能从主线程调用UI的操作。 doInBackground()使用它自己的线程。处理进度覆盖AsyncTask的方法onProgressUpdate()。

来源

2012-11-20 05:34:19

感谢给定的响应..但不执行任何ui操作doInBackground（）。 –

'share_img'，'share_tv'，'second.canvas'等等都是您尝试从'doInBackground（）'调用的apllyEffect（）访问的用户界面元素... – Sam

你不能在后台线程中进行UI操作。如果你这样做，你会得到一个android.view.ViewRoot$CalledFromWrongThreadException。

将您的UI操作移至onPostExecute()方法。

来源

2012-11-20 05:34:50

感谢您的回应。但不对doInBackground（）执行任何UI操作。 –

欢迎。请注册或标记为已接受，以便帮助其他人。 –

当我点击保存按钮时，AsyncTask中发生错误？

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