问题描述

如何重新设置bimpat的大小?

在我的程序中我需要重新设置 bitmap的大小，设置成imageview的大小，下面的代码报错了，如何改正，重新设置 bitmap的大小？

Bitmap bmp = Bitmap.createBitmap(bmp 0 0 bmp.getWidth() bmp.getHeight() aMatrix false);Bitmap.createScaledBitmap(bmp MyImageview_wt MyImageview_ht false);MyImageview.setImageBitmap(bmp);

解决方案

使用下面的代码试试：

 public static Bitmap resizeBitMapImage1(String filePath int targetWidth            int targetHeight) {        Bitmap bitMapImage = null;        // First get the dimensions of the image        Options options = new Options();        options.inJustDecodeBounds = true;        BitmapFactory.decodeFile(filePath options);        double sampleSize = 0;        // Only scale if we need to        // (16384 buffer for img processing)        Boolean scaleByHeight = Math.abs(options.outHeight - targetHeight) >= Math                .abs(options.outWidth - targetWidth);            if (options.outHeight * options.outWidth * 2 >= 1638) {            // Load scaling to smallest power of 2 that'll get it <= desired            // dimensions            sampleSize = scaleByHeight ? options.outHeight / targetHeight                    : options.outWidth / targetWidth;            sampleSize = (int) Math.pow(2d                    Math.floor(Math.log(sampleSize) / Math.log(2d)));        }        // Do the actual decoding        options.inJustDecodeBounds = false;        options.inTempStorage = new byte[128];        while (true) {            try {                options.inSampleSize = (int) sampleSize;                bitMapImage = BitmapFactory.decodeFile(filePath options);                  break;            } catch (Exception ex) {                try {                    sampleSize = sampleSize * 2;                } catch (Exception ex1) {                  }            }        }        return bitMapImage;    }

解决方案二：

public static Bitmap createBitmap (Bitmap source int x int y int width int height Matrix m boolean filter) 

第一个参数是个资源图片，直接用bmp哪有图片
这是高级方式裁剪图片

解决方案三：
http://blog.csdn.net/tf576776047/article/details/8143456 看一下