java - 从缓存中还原图片时，Android OutOfMemoryError

我的应用程序有一个GridView，其中每个项目都是ImageView。我编写了自定义适配器，将图像设置为ImageViews。使用AsyncTask异步设置图像

我的AsyncTask从缓存中还原图像

@Override
protected Bitmap doInBackground(Void... params) {
   return BitmapFactory.decodeFile(file.getAbsolutePath());
}

@Override
protected void onPostExecute(Bitmap bitmap) {
    if (bitmap != null) {
        imageView.setImageBitmap(bitmap);
    } else {
        // load image from db
    }
}

GridView放在片段上。替换服务器碎片后，在BitmapFactory.decodeFile(file.getAbsolutePath());行出现了OutOfMemoryError

E/AndroidRuntime﹕ FATAL EXCEPTION: AsyncTask #2
    java.lang.RuntimeException: An error occured while executing doInBackground()
            at android.os.AsyncTask$3.done(AsyncTask.java:299)
            at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
            at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
            at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
            at java.util.concurrent.FutureTask.run(FutureTask.java:137)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
            at java.lang.Thread.run(Thread.java:864)
     Caused by: java.lang.OutOfMemoryError: (Heap Size=131079KB, Allocated=126797KB)
            at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
            at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:658)
            at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:347)
            at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:430)
            at com.ThreeBoots.utils.ImageProcessor$2.doInBackground(ImageProcessor.java:248)
            at com.ThreeBoots.utils.ImageProcessor$2.doInBackground(ImageProcessor.java:245)
            at android.os.AsyncTask$2.call(AsyncTask.java:287)
            at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
            at java.util.concurrent.FutureTask.run(FutureTask.java:137)
            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
            at java.lang.Thread.run(Thread.java:864)

请帮助我解决此问题。
谢谢！

最佳答案

您不得将位图直接加载到内存中。定义生成的位图应具有的大小，并使用此处描述的技术加载位图的缩放版本：
http://developer.android.com/training/displaying-bitmaps/load-bitmap.html