Question

我正在尝试将bitcode图像转换为base64格式。我尝试编码像

public static String encodeToBase64(Bitmap image, Bitmap.CompressFormat compressFormat, int quality)
{
    ByteArrayOutputStream byteArrayOS = new ByteArrayOutputStream();
    image.compress(compressFormat, quality, byteArrayOS);
    return Base64.encodeToString(byteArrayOS.toByteArray(), Base64.URL_SAFE);
}

生成的响应低于它不再给我图像。

有人可以提供一些指示吗？我可能做错了什么？

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Answer 1

尝试此功能：

NullReferenceException

Answer 2

这里有一些误解。在您的方法中，您将通过参数接收位图（图像）。如果你想将它传递给base64格式，你就是这样做的，因为base64格式只是一个大字符串，正如你在回程中看到的那样。

如果错误出现在您的方法和反向过程中（将String中的Base64解析为Bitmap），您可以尝试此功能：

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();  
bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream .toByteArray();

从base64编码byte array使用以下方法：

String encoded = Base64.encodeToString(byteArray, Base64.DEFAULT);

另外，尝试使用此方法来反转编码过程：

byte[] decodedString = android.util.Base64.decode(yourString, android.util.Base64.DEFAULT);
                            Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);

位图图像到base64转换

2 个答案: