如何减少内存消耗在android系统

Question

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

我在机器人领域的新。我不知道如何减少android中的内存消耗。在我的应用程序中，大量的图像从网上绘制并显示到网格视图中。当运行应用程序时出现“内存不足问题”。

请帮我

Answer 1

1）规模，并降低图像

/** 
* 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();的大小指示的虚拟机，这将是一个很好的时间运行垃圾回收器