问题
I am trying to convert a bitmap image into base64 String using this code. I and getting a very low-quality image. How can I get a good quality image after convert bitmap into Base64 Sring
public String BitMapToString(Bitmap bitmap) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
byte[] b = baos.toByteArray();
base64Image = Base64.encodeToString(b, Base64.DEFAULT);
return base64Image;
}
If I have a 5MB image. After convert, I am getting the only 160KB image. But in my case, I don't want to compress my image too much I just want to get Base64 String based on Bitmap image only JPEG format, not any other. Please help me with this.
回答1:
Try this:
public String getBase64Image(Bitmap bitmap) {
try {
ByteBuffer buffer =
ByteBuffer.allocate(bitmap.getRowBytes() *
bitmap.getHeight());
bitmap.copyPixelsToBuffer(buffer);
byte[] data = buffer.array();
return Base64.encodeToString(bytes, Base64.DEFAULT);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
来源：https://stackoverflow.com/questions/55785798/how-to-convert-bitmap-into-base64-string-without-compressing