原问题来自于CSDN问答频道,更多解决方案见:http://ask.csdn.net/questions/2244问题描述: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;
}
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 »
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