代码如下:
private String filePathToBase64(String path){
Bitmap bitmap= BitmapFactory.decodeFile(path);
ByteArrayOutputStream bos=new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG,100,bos);
byte[] imageBytes=bos.toByteArray();
return Base64.encodeToString(imageBytes,Base64.DEFAULT);
}