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public Bitmap convertToBitmap(String path, int w, int h) { BitmapFactory.Options opts = new BitmapFactory.Options(); // 设置为ture只获取图片大小 opts.inJustDecodeBounds = true ; opts.inPreferredConfig = Bitmap.Config.ARGB_8888; // 返回为空 BitmapFactory.decodeFile(path, opts); int width = opts.outWidth; int height = opts.outHeight; float scaleWidth = 0 .f, scaleHeight = 0 .f; if (width > w || height > h) { // 缩放 scaleWidth = (( float ) width) / w; scaleHeight = (( float ) height) / h; } opts.inJustDecodeBounds = false ; float scale = Math.max(scaleWidth, scaleHeight); opts.inSampleSize = ( int )scale; WeakReference<Bitmap> weak = new WeakReference<Bitmap>(BitmapFactory.decodeFile(path, opts)); return Bitmap.createScaledBitmap(weak.get(), w, h, true ); } |
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原文地址:http://www.cnblogs.com/yaya-Android/p/4515131.html