这个问题很早就遇到了,当时怎么解决的忘记了。今天在做项目的时候又出现了。
我先是在我自己的Lenovo A750手机上调试没问题,放到HTC的G18上报错!放到电脑的2.2模拟器上报错!这个问题一出现瞬间发狂了~
好吧,来了我就把它解决掉!
先看看我的问题出在哪里:
1 LayoutInflater inflater=getLayoutInflater(); 2 list=new ArrayList<View>(); 3 list.add(inflater.inflate(R.layout.item1, null));//就在这!
4 list.add(inflater.inflate(R.layout.item2, null)); 5 list.add(inflater.inflate(R.layout.item3, null)); 6 list.add(inflater.inflate(R.layout.item4, null));
我在每一个item中只加了一个imageview控件,图片的src在xml中就定好了。在添加到list中的时候报错了。
在网上找引起报错的原因没直接找到,但找到一个相关的:
“当图片过大,或图片数量较多时使用BitmapFactory解码图片会出java.lang.OutOfMemoryError: bitmap size exceeds VM budget,要想正常使用则需分配更少的内存,具体的解决办法是修改采样值BitmapFactory.Options.inSampleSize”
同样的错误错误效果,他们出错是在读取图片文件的时候报错,看看自己的代码,想要修改Options.inSampleSize要把每一个item中的imageview控件拿出来设置他们的setBackgroundDrawable。
如下:
1 LayoutInflater inflater=getLayoutInflater(); 2 list=new ArrayList<View>(); 3
4 View view = inflater.inflate(R.layout.item1, null); 5 view.findViewById(R.id.well_item).setBackgroundDrawable(new BitmapDrawable(readBitMap(this.getApplicationContext(), R.drawable.b1))); 6 list.add(view); 7
8 View view2 = inflater.inflate(R.layout.item2, null); 9 view2.findViewById(R.id.well_item).setBackgroundDrawable(new BitmapDrawable(readBitMap(this.getApplicationContext(), R.drawable.b2))); 10 list.add(view2); 11
12 View view3 = inflater.inflate(R.layout.item3, null); 13 view3.findViewById(R.id.well_item).setBackgroundDrawable(new BitmapDrawable(readBitMap(this.getApplicationContext(), R.drawable.b3))); 14 list.add(view3); 15
16 View view4 = inflater.inflate(R.layout.item4, null); 17 view4.findViewById(R.id.imageView1).setBackgroundDrawable(new BitmapDrawable(readBitMap(this.getApplicationContext(), R.drawable.b4))); 18 list.add(view4); 19
上面的readBitMap方法就是解决问题的关键:
1 public static Bitmap readBitMap(Context context, int resId){ 2 BitmapFactory.Options opt = new BitmapFactory.Options(); 3 opt.inPreferredConfig = Bitmap.Config.RGB_565; 4 opt.inPurgeable = true; 5 opt.inInputShareable = true; 6 opt.inSampleSize = computeSampleSize(opt, -1, 128*128); //计算出图片使用的inSampleSize
7 opt.inJustDecodeBounds = false; 8 //获取资源图片
9 InputStream is = context.getResources().openRawResource(resId); 10 return BitmapFactory.decodeStream(is,null,opt); 11 } 12
13 public static int computeSampleSize(BitmapFactory.Options options, 14 int minSideLength, int maxNumOfPixels) { 15 int initialSize = computeInitialSampleSize(options, minSideLength,maxNumOfPixels); 16
17 int roundedSize; 18 if (initialSize <= 8 ) { 19 roundedSize = 1; 20 while (roundedSize < initialSize) { 21 roundedSize <<= 1; 22 } 23 } else { 24 roundedSize = (initialSize + 7) / 8 * 8; 25 } 26
27 return roundedSize; 28 } 29
30 private static int computeInitialSampleSize(BitmapFactory.Options options,int minSideLength, int maxNumOfPixels) { 31 double w = options.outWidth; 32 double h = options.outHeight; 33
34 int lowerBound = (maxNumOfPixels == -1) ? 1 : 35 (int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels)); 36 int upperBound = (minSideLength == -1) ? 128 : 37 (int) Math.min(Math.floor(w / minSideLength), 38 Math.floor(h / minSideLength)); 39
40 if (upperBound < lowerBound) { 41 // return the larger one when there is no overlapping zone.
42 return lowerBound; 43 } 44
45 if ((maxNumOfPixels == -1) &&
46 (minSideLength == -1)) { 47 return 1; 48 } else if (minSideLength == -1) { 49 return lowerBound; 50 } else { 51 return upperBound; 52 } 53 }
“他们还提供一个方法是Bitmap.recycle()方法来释放位图所占的空间,当然前提是位图没有被使用”。本次是在加载第一个的时候就已经报错。不在考虑了额。
参考链接:http://www.cnblogs.com/xiyo/archive/2012/05/26/2519028.html