如何減少內存消耗在android系統

Question

可能重複：
Android: Strange out of memory issue while loading an image to a Bitmap object

我在機器人領域的新。我不知道如何減少android中的內存消耗。在我的應用程序中，大量的圖像從網上繪製並顯示到網格視圖中。當運行應用程序時出現「內存不足問題」。

請幫我

Answer 1

1）規模，並降低圖像

/** 
* decodes image and scales it to reduce memory consumption 
* 
* @param file 
* @param requiredSize 
* @return 
*/ 
public static Bitmap decodeFile(File file, int requiredSize) { 
    try { 

     // Decode image size 
     BitmapFactory.Options o = new BitmapFactory.Options(); 
     o.inJustDecodeBounds = true; 
     BitmapFactory.decodeStream(new FileInputStream(file), null, o); 

     // The new size we want to scale to 

     // Find the correct scale value. It should be the power of 2. 
     int width_tmp = o.outWidth, height_tmp = o.outHeight; 
     int scale = 1; 
     while (true) { 
      if (width_tmp/2 < requiredSize 
        || height_tmp/2 < requiredSize) 
       break; 
      width_tmp /= 2; 
      height_tmp /= 2; 
      scale *= 2; 
     } 

     // Decode with inSampleSize 
     BitmapFactory.Options o2 = new BitmapFactory.Options(); 
     o2.inSampleSize = scale; 

     Bitmap bmp = BitmapFactory.decodeStream(new FileInputStream(file), 
       null, o2); 

     return bmp; 

    } catch (FileNotFoundException e) { 
    } finally { 
    } 
    return null; 
} 

2）使用bitmap.Recycle();

3）使用System.gc();的大小指示的虛擬機，這將是一個很好的時間運行垃圾回收器