內存不足的一個字節分配，asynctask 5

我想從「url」這是我的SD卡中包含大約40個圖像到我的閱讀器中的文件夾中的圖像，但我不斷收到內存不足的錯誤。無論如何解決它？可能是因爲我試圖一次加載40個圖像這就是爲什麼它導致錯誤？內存不足的一個字節分配，asynctask 5

下面是我的logcat輸出

02-01 15:38:17.410: D/url(10695): /mnt/sdcard/Android/data/com.sfa.coverflow/Issues/20/1944628064 
02-01 15:38:17.440: D/dalvikvm(10695): GC_FOR_ALLOC freed 7144K, 32% free 16978K/24711K, paused 23ms 
02-01 15:38:17.440: I/dalvikvm-heap(10695): Forcing collection of SoftReferences for 33033616-byte allocation 
02-01 15:38:17.460: D/dalvikvm(10695): GC_BEFORE_OOM freed 9K, 32% free 16969K/24711K, paused 25ms 
02-01 15:38:17.460: E/dalvikvm-heap(10695): Out of memory on a 33033616-byte allocation. 
02-01 15:38:17.460: I/dalvikvm(10695): "AsyncTask #5" prio=5 tid=17 RUNNABLE 
02-01 15:38:17.460: I/dalvikvm(10695): | group="main" sCount=0 dsCount=0 obj=0x411358f0 self=0x468d20 
02-01 15:38:17.460: I/dalvikvm(10695): | sysTid=10718 nice=10 sched=0/0 cgrp=bg_non_interactive handle=3779488 
02-01 15:38:17.460: I/dalvikvm(10695): | schedstat=(48743000 7345000 28) utm=4 stm=0 core=1 
02-01 15:38:17.460: I/dalvikvm(10695): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method) 
02-01 15:38:17.460: I/dalvikvm(10695): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:493) 
02-01 15:38:17.460: I/dalvikvm(10695): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:299) 
02-01 15:38:17.460: I/dalvikvm(10695): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:324) 
02-01 15:38:17.460: I/dalvikvm(10695): at com.sfa.touchview.UrlTouchImageView$ImageLoadTask.doInBackground(UrlTouchImageView.java:108) 
02-01 15:38:17.460: I/dalvikvm(10695): at com.sfa.touchview.UrlTouchImageView$ImageLoadTask.doInBackground(UrlTouchImageView.java:1) 
02-01 15:38:17.460: I/dalvikvm(10695): at android.os.AsyncTask$2.call(AsyncTask.java:264) 
02-01 15:38:17.460: I/dalvikvm(10695): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 
02-01 15:38:17.460: I/dalvikvm(10695): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 
02-01 15:38:17.460: I/dalvikvm(10695): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 
02-01 15:38:17.460: I/dalvikvm(10695): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 
02-01 15:38:17.460: I/dalvikvm(10695): at java.lang.Thread.run(Thread.java:856) 
02-01 15:38:17.460: D/skia(10695): --- decoder->decode returned false 
02-01 15:38:17.470: W/dalvikvm(10695): threadid=17: thread exiting with uncaught exception (group=0x40a4f1f8) 
02-01 15:38:17.470: E/AndroidRuntime(10695): FATAL EXCEPTION: AsyncTask #5 
02-01 15:38:17.470: E/AndroidRuntime(10695): java.lang.RuntimeException: An error occured while executing doInBackground() 
02-01 15:38:17.470: E/AndroidRuntime(10695): at android.os.AsyncTask$3.done(AsyncTask.java:278) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at java.util.concurrent.FutureTask.setException(FutureTask.java:124) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at java.util.concurrent.FutureTask.run(FutureTask.java:137) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at java.lang.Thread.run(Thread.java:856) 
02-01 15:38:17.470: E/AndroidRuntime(10695): Caused by: java.lang.OutOfMemoryError 
02-01 15:38:17.470: E/AndroidRuntime(10695): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:493) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:299) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:324) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at com.sfa.touchview.UrlTouchImageView$ImageLoadTask.doInBackground(UrlTouchImageView.java:108) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at com.sfa.touchview.UrlTouchImageView$ImageLoadTask.doInBackground(UrlTouchImageView.java:1) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at android.os.AsyncTask$2.call(AsyncTask.java:264) 
02-01 15:38:17.470: E/AndroidRuntime(10695): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) 
02-01 15:38:17.470: E/AndroidRuntime(10695): ... 4 more

這是在錯誤發生

public class ImageLoadTask extends AsyncTask<String, Integer, Bitmap> 
    { 
     //RETRIEVES LINK FROM GALLERYACTIVITY 
     //READ MNT/SDCARD/.... 

     @Override 
     protected Bitmap doInBackground(String... strings) { 
      bm = null; 
      String url = strings[0]; 
      Log.d("url",url); 

      bm = BitmapFactory.decodeFile(url); 
      return bm; 

     }

來源

2013-02-01 user1234555

使用下面的代碼來調整你的位圖。

例如，如果你的一個loadion在300 * 300

視圖與resoultion 1200×800的圖像，你可以使用decodeSampledBitmapFromResource(getResource(),R.drawable.mImage,300,300) 爲了減少內存使用情況。

/** 
    * 
    * get a resized bitmap 
    * @param bm 
    * @param newHeight 
    * @param newWidth 
    * @return 
    */ 
    public static Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) { 
     int width = bm.getWidth(); 
     int height = bm.getHeight(); 
     float scaleWidth = ((float) newWidth)/width; 
     float scaleHeight = ((float) newHeight)/height; 
     // create a matrix for the manipulation 
     Matrix matrix = new Matrix(); 
     // resize the bitmap 
     matrix.postScale(scaleWidth, scaleHeight); 
     // "recreate" the new bitmap 
     Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height, 
       matrix, false); 
     return resizedBitmap; 
    } 

    /** 
    * Decode a bitmap for avoiding out of memory issue 
    * @param res 
    * @param resId 
    * @param reqWidth 
    * @param reqHeight 
    * @return 
    */ 
    public static Bitmap decodeSampledBitmapFromResource(Resources res, 
      int resId, int reqWidth, int reqHeight) { 

     // First decode with inJustDecodeBounds=true to check dimensions 
     final BitmapFactory.Options options = new BitmapFactory.Options(); 
     options.inJustDecodeBounds = true; 
     BitmapFactory.decodeResource(res, resId, options); 

     // Calculate inSampleSize 
     options.inSampleSize = calculateInSampleSize(options, reqWidth, 
       reqHeight); 
     // Decode bitmap with inSampleSize set 
     options.inJustDecodeBounds = false; 
     return BitmapFactory.decodeResource(res, resId, options); 

    } 

    public static int calculateInSampleSize(BitmapFactory.Options options, 
      int reqWidth, int reqHeight) { 
     // Raw height and width of image 
     final int height = options.outHeight; 
     final int width = options.outWidth; 
     int inSampleSize = 1; 

     if (height > reqHeight || width > reqWidth) { 

      // Calculate ratios of height and width to requested height and 
      // width 
      final int heightRatio = Math.round((float) height 
        /(float) reqHeight); 
      final int widthRatio = Math.round((float) width/(float) reqWidth); 

      // Choose the smallest ratio as inSampleSize value, this will 
      // guarantee 
      // a final image with both dimensions larger than or equal to the 
      // requested height and width. 
      inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio; 
     } 

     return inSampleSize; 
    }

來源

2013-02-01 07:50:48 bladeX

嗨，我該如何實現代碼？對不起，我不是很擅長編程 – user1234555

嗨，我已經實現了你的代碼，並做了mImageView.setImageBitmap（getResizedBitmap（bm，700,500））;但我仍然得到相同的錯誤:( – user1234555

不，你應該使用decodeSampledBitmapResource不getResizedBitmap如果你仍然有相同的問題嘗試減少位圖的大小，例如decodeSampledBitmapFromResource（getResource（），R.drawable.mImage，100,100） – bladeX

你應該this文章有關加載位圖，以避免這一點。另外觀看Android開發者的這個video將會很有用。

來源

2013-02-01 07:53:49

內存不足的一個字節分配，asynctask 5

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