Android - Base64

Android 将图片转换为Base64

public void convertToBase64(View view) throws IOException {
  	//获取ImageView的图片
    BitmapDrawable drawable = (BitmapDrawable) mPetIV.getDrawable();
    Bitmap bitmap = drawable.getBitmap();
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
	//以没有压缩的方式讲图片写入到内流中
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
    //将保存在内存中的图片转换为base64
    String base64 = Base64.encodeToString(byteArrayOutputStream.toByteArray(), Base64.DEFAULT);
    L.e(base64);
    byteArrayOutputStream.close();
}

Base64 转化为图片

/**
 * 将Base64 转换为图片
 */
public void fromBase64(View view) {
    byte[] buffer = Base64.decode(mBase64, Base64.DEFAULT);
    Bitmap bitmap = BitmapFactory.decodeByteArray(buffer, 0, buffer.length);
    mPetIV.setImageBitmap(bitmap);
}