绑定GirdView时报内存误--解决方案

问题描述：

选择相册或者拍照的图片，然后绑定GirdView，选择一张照片的时候，app运行正常，当选择多张照片时，app莫名的直接退出。

开始百思不得其解，经验告诉自己，去查看LogCat跟踪信息，结果发现很耀眼的词汇，

OutOfMemoryError,擦擦 果然是你导致的

解决方案：

 1 public class MySimpleAdapter extends SimpleAdapter 
 2 {
 3      public MySimpleAdapter(Context context,
 4             List<? extends Map<String, ?>> data, int resource, String[] from,
 5             int[] to) {
 6         super(context, data, resource, from, to);
 7         // TODO Auto-generated constructor stub
 8     }
 9 
10 @Override
11     public void setViewImage(ImageView imageView, String imageFile) {
12 
13         // TODO Auto-generated method stub
14         try {
15             imageView.setImageResource(Integer.parseInt(imageFile));
16         } catch (NumberFormatException nfe) {
17 
18             BitmapFactory.Options opts = new BitmapFactory.Options();
19             opts.inJustDecodeBounds = true;
20             BitmapFactory.decodeFile(imageFile, opts);
21 
22             opts.inSampleSize = computeSampleSize(opts, -1, 128 * 128);
23             // 这里一定要将其设置回false，因为之前我们将其设置成了true
24             opts.inJustDecodeBounds = false;
25             try {
26                 Bitmap bmp = BitmapFactory.decodeFile(imageFile, opts);
27                 imageView.setImageBitmap(bmp);
28             } catch (OutOfMemoryError err) {
29             }
30         }
31         //
32 
33     }
34 
35 
36 public static int computeSampleSize(BitmapFactory.Options options,
37             int minSideLength, int maxNumOfPixels) {
38         int initialSize = computeInitialSampleSize(options, minSideLength,
39                 maxNumOfPixels);
40 
41         int roundedSize;
42         if (initialSize <= 8) {
43             roundedSize = 1;
44             while (roundedSize < initialSize) {
45                 roundedSize <<= 1;
46             }
47         } else {
48             roundedSize = (initialSize + 7) / 8 * 8;
49         }
50 
51         return roundedSize;
52     }
53 
54     private static int computeInitialSampleSize(BitmapFactory.Options options,
55             int minSideLength, int maxNumOfPixels) {
56         double w = options.outWidth;
57         double h = options.outHeight;
58 
59         int lowerBound = (maxNumOfPixels == -1) ? 1 : (int) Math.ceil(Math
60                 .sqrt(w * h / maxNumOfPixels));
61         int upperBound = (minSideLength == -1) ? 128 : (int) Math.min(
62                 Math.floor(w / minSideLength), Math.floor(h / minSideLength));
63 
64         if (upperBound < lowerBound) {
65             return lowerBound;
66         }
67 
68         if ((maxNumOfPixels == -1) && (minSideLength == -1)) {
69             return 1;
70         } else if (minSideLength == -1) {
71             return lowerBound;
72         } else {
73             return upperBound;
74         }
75     }
76 
77 }

 

posted @ 2013-04-22 13:25  大匪猫  阅读(181)  评论(0)  编辑  收藏  举报