1、根据图片宽、高压缩图片
public static Bitmap getBitmap(String filePath) {
final BitmapFactory.Options options =new BitmapFactory.Options();
options.inJustDecodeBounds=true;
BitmapFactory.decodeFile(filePath, options);
// Calculate inSampleSize
options.inSampleSize=calculateInSampleSize1(options, 480, 800);
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds=false;
return BitmapFactory.decodeFile(filePath, options);
}
public static int calculateInSampleSize(BitmapFactory.Options options,
int reqWidth,int reqHeight) {
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int heightRatio = Math.round((float) height
/ (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}
2、压缩Bitmap质量
public static byte[] Bitmap2Bytes(Bitmap bm)
{
ByteArrayOutputStream baos =new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG, 80, baos);
return baos.toByteArray();
}
