Android Bitmpafun在BitmapFactory.decodeFileDescriptor崩溃

Question

我使用android的Bitmapfun应用程序有效地加载位图.但有时在BitmapFactory.decodeFileDescriptor()发生崩溃.Log cat和函数如下所示.Crash发生在return语句中.请帮帮我.谢谢.

 public static Bitmap decodeSampledBitmapFromDescriptor(
        FileDescriptor fileDescriptor, int reqWidth, int reqHeight, ImageCache cache) {

    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeFileDescriptor(fileDescriptor, null, options);

    // Calculate inSampleSize
    options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;

    // If we're running on Honeycomb or newer, try to use inBitmap
    if (Utils.hasHoneycomb()) {
        addInBitmapOptions(options, cache);
    }

    return BitmapFactory.decodeFileDescriptor(fileDescriptor, null, options);
}

logcat的

  06-25 14:20:56.055: E/AndroidRuntime(5978): FATAL EXCEPTION: AsyncTask #3
06-25 14:20:56.055: E/AndroidRuntime(5978): java.lang.RuntimeException: An error occured while executing doInBackground()
06-25 14:20:56.055: E/AndroidRuntime(5978):     at com.vbk.vobok.util.AsyncTask$3.done(AsyncTask.java:325)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at java.util.concurrent.FutureTask.run(FutureTask.java:137)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at java.lang.Thread.run(Thread.java:856)
06-25 14:20:56.055: E/AndroidRuntime(5978): Caused by: java.lang.IllegalArgumentException: Problem decoding into existing bitmap
06-25 14:20:56.055: E/AndroidRuntime(5978):     at android.graphics.BitmapFactory.decodeFileDescriptor(BitmapFactory.java:664)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at com.vbk.vobok.util.ImageResizer.decodeSampledBitmapFromDescriptor(ImageResizer.java:196)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at com.vbk.vobok.util.ImageFetcher.processBitmap(ImageFetcher.java:242)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at com.vbk.vobok.util.ImageFetcher.processBitmap(ImageFetcher.java:255)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at com.vbk.vobok.util.ImageWorker$BitmapWorkerTask.doInBackground(ImageWorker.java:326)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at com.vbk.vobok.util.ImageWorker$BitmapWorkerTask.doInBackground(ImageWorker.java:1)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at com.vbk.vobok.util.AsyncTask$2.call(AsyncTask.java:313)
06-25 14:20:56.055: E/AndroidRuntime(5978):     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
06-25 14:20:56.055: E/AndroidRuntime(5978):     ... 4 more

Answer 1

我使用了 BitMapFun，很遗憾地告诉你，这个项目充满了错误。例如，在 AsyncTask 中，它们不是从 UiThread 执行 setDrawable(..)，而是作为弱引用队列工作。这意味着如果用户快速向下滚动，用户将需要很长时间才能看到图像（取决于网络强度）。

关于您的错误，在 Android 2.1-2.3.7 中，存在一个 Dalvik VM GC 错误，该错误不会释放本机堆中分配的空间。您必须在位图上调用 recycle() 并在 imageView 上调用 setDrawable(null)，通过调用 System.gc() 应该可以解决此错误。如果我对你有帮助，请告诉我。干杯