AsyncTask Android 中的致命信号 6 (SIGABRT)

Posted 2023-05-07

【中文标题】AsyncTask Android 中的致命信号 6 (SIGABRT)

【英文标题】：Fatal signal 6 (SIGABRT) in AsyncTask Android

【发布时间】：2020-05-01 02:25:23

【问题描述】：

我在 asynctask 中压缩 Bitmap 并通过 Bundle 将其发送到另一个活动，我遇到了这个崩溃。我在我的代码中调用 Bitmap.recycle() 。有时它可以正常工作，这是我的 Logcat 输出。

Called getHeight() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called getWidth() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called getWidth() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called getHeight() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called getWidth() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called getHeight() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called getWidth() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called getHeight() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called getConfig() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called getConfig() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.863 21779-22017/ W/Bitmap: Called hasAlpha() on a recycle()'d bitmap! This is undefined behavior!
2020-01-14 16:25:56.864 21779-22017/ A/Bitmap: Error, cannot access an invalid/free'd bitmap here!
2020-01-14 16:25:56.864 21779-22017/ A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 22017 (AsyncTask #5), pid 21779 

这是压缩图像的代码

private static void compressImage(final Bitmap bitmap, final Callback<Bitmap> gbCallback) 

    new AsyncTask<Void, Void, Bitmap>() 
        protected void onPreExecute() 
        

        @Override
        protected Bitmap doInBackground(Void... params) 

            Bitmap image = getScaledImageCopy(bitmap);
            if (image != null) 
                ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
                image.compress(Bitmap.CompressFormat.JPEG, 80, byteArrayOutputStream);

                byte[] byteArray = byteArrayOutputStream.toByteArray();
                image = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
                return image;
             else 
                return null;
            
        

        @Override
        protected void onPostExecute(Bitmap bitmap) 
            gbCallback.call(bitmap);
        
    .execute(null, null, null);

 private static Bitmap getScaledImageCopyForUGC(Bitmap image) 
    try 
        int height = image.getHeight();
        int width = image.getWidth();
        return Bitmap.createScaledBitmap(image, 400, (400 * height) / width, true);
     catch (Exception e) 
        if (image != null) 
            return Bitmap.createScaledBitmap(image, 300, 300, true);
         else 
            return null;
        
    

【问题讨论】：

显示用于压缩位图的代码

代码添加@TusharMonirul

这能回答你的问题吗？ What is fatal signal 6 in android logcat

【参考方案1】：

位图似乎已经被回收了。您不能使用回收的位图。您需要确保在compressImage 中传递的位图未被回收。现在您可以检查位图是否被回收以避免错误。

if(!bitmap.isRecycled())
    //bitmap is not recycled
else 
    //bitmap is recycled, use a default placeholder