我有一张图片。我想在不损失质量的情况下压缩它。我该怎么做?请任何人帮帮我吗? 我使用下面的代码压缩图像。
bitmap = decodeSampledBitmapFromResource(getResources(), strSignaturePath, 150, 30);
public static Bitmap decodeSampledBitmapFromResource(Resources res,
String imagepath, int reqWidth, int reqHeight) {
// First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(imagepath, options);
// BitmapFactory.decodeResource(res, imagepath, options);
// Calculate inSampleSize
options.inSampleSize = calculateInSampleSize(options, reqWidth,
reqHeight);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(imagepath, options);
}
private static int calculateInSampleSize(Options options, int reqWidth,
int reqHeight) {
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
// Calculate ratios of height and width to requested height and
// width
final int heightRatio = Math.round((float) height
/ (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
// Choose the smallest ratio as inSampleSize value, this will
// guarantee
// a final image with both dimensions larger than or equal to the
// requested height and width.
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}