bitmap和base64之间的转换

/** 
 * bitmap转为base64 
 * @param bitmap 
 * @return 
 */  
public static String bitmapToBase64(Bitmap bitmap) {  
  
    String result = null;  
    ByteArrayOutputStream baos = null;  
    try {  
        if (bitmap != null) {  
            baos = new ByteArrayOutputStream();  
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);  
  
            baos.flush();  
            baos.close();  
  
            byte[] bitmapBytes = baos.toByteArray();  
            result = Base64.encodeToString(bitmapBytes, Base64.DEFAULT);  
        }  
    } catch (IOException e) {  
        e.printStackTrace();  
    } finally {  
        try {  
            if (baos != null) {  
                baos.flush();  
                baos.close();  
            }  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }  
    return result;  
}  
  
/** 
 * base64转为bitmap 
 * @param base64Data 
 * @return 
 */  
public static Bitmap base64ToBitmap(String base64Data) {  
    byte[] bytes = Base64.decode(base64Data, Base64.DEFAULT);  
    return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);  
}