501
Android图片的缩放处理
/**
* resize Bitmap
*
* @param bitmap
* @param newWidth
* @return
*/
public static Bitmap resizeBitmap(Bitmap bitmap, int newWidth) {
if (bitmap == null)
return null;
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Log.e("Jarvis", w + "~" + h);
float temp = ((float) h) / ((float) w);
int newHeight = (int) (newWidth * temp);
float scaleWidth = ((float) newWidth) / w;
float scaleHeight = ((float) newHeight) / h;
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix,
true);
if (!bitmap.isRecycled()) {
bitmap.recycle();
}
return resizedBitmap;
}
/**
* 放大缩小图片
*
* @param bitmap
* @param w
* @param h
* @return
*/
public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidht = ((float) w / width);
float scaleHeight = ((float) h / height);
matrix.postScale(scaleWidht, scaleHeight);
Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height,
matrix, true);
return newbmp;
}
最后更新：2017-04-02 16:47:34