Android的位图不是从BASE64创建 [英] android bitmap isn't created from base64

问题描述

我有一个Android应用程序，发送图像到Web服务。我想同一张照片从Web服务到Android送回。

我做了一个测试程序来比较这与Android的发送到服务器而这送回从服务器到Android中的Base64 Base64编码的数据 - 他们是完全相等

。

我想使用基本的64字符串创建位图，所以我尝试这样的：

 字符串图像= client1.getBaseURI（restaurantFoods / OneFood /
            + this.getID（）+/的getImage）;

byte []的德codedString = Base64.de code（图像，Base64.DEFAULT）;
        位图德codedByte = BitmapFactory.de codeByteArray（德codedString，0，
                德codedString.length）;
如果（德codedByte == NULL）{
            Log.d（this.getFoodItem（）的getName（），图像）;
            Log.d（的isNull，是）;
        }
        其他{
            Log.d（的isNull，否）;}
 

我不断收到空，因为日志只是打印YES。

任何人都可以请帮助？

如果你想知道我怎么连接code中的图像是如下：

 私人字符串getBase64（位图位图）{
        字符串imgString = Base64.en codeToString（getBytesFromBitmap（位图）
                Base64.NO_WRAP）;
        返回imgString;
    }
私人字节[] getBytesFromBitmap（位图位图）{
        ByteArrayOutputStream流=新ByteArrayOutputStream（）;
        bitmap.com preSS（比较pressFormat.JPEG，70，流）;
        返回stream.toByteArray（）;
    }
位图图标= BitmapFactory.de codeResource（this.getResources（）
                    R.drawable.pizza）;
字符串iconBase64 = this.getBase64（图标）;
 

解决方案

试试这个位图;

 公共位图转换（字符串IMG）{
    byte []的B = Base64.de code（IMG，Base64.DEFAULT）;
    返回BitmapFactory.de codeByteArray（B，0，b.length个）;
}
 

和这串

 公共字符串转换（位图BM，诠释品质）{
    ByteArrayOutputStream BAOS =新ByteArrayOutputStream（）;
    bm.com preSS（Bitmap.Com pressFormat.JPEG，质量，BAOS）;

    byte []的BYT = baos.toByteArray（）;
    bm.recycle（）;
    返回Base64.en codeToString（BYT，Base64.DEFAULT）;
}
 

我真的没有看到任何真正的问题，您的code，但这些对我来说都工作过，所以我建议你尝试一下，看看是否实际上是你的问题。

I have an Android application which sends an image to a web service. I want to send the same photo back from the web service to Android.

I made a test program to compare the base64 data that's sent from Android to the server and the base64 that's sent back from server to Android -- they are exactly equal.

I want to use the base 64 string to create a bitmap, so I tried this:

String image = client1.getBaseURI("restaurantFoods/OneFood/"
            + this.getID() + "/getImage");

byte[] decodedString = Base64.decode(image, Base64.DEFAULT);
        Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0,
                decodedString.length);
if(decodedByte == null){
            Log.d(this.getFoodItem().getName(), image);
            Log.d("isNull", "Yes");
        }
        else{
            Log.d("isNull", "No");}

I keep getting null because the log just prints "YES".

Can anyone please help?

If you want to know how I encode the image it is as follows:

private String getBase64(Bitmap bitmap) {
        String imgString = Base64.encodeToString(getBytesFromBitmap(bitmap),
                Base64.NO_WRAP);
        return imgString;
    }
private byte[] getBytesFromBitmap(Bitmap bitmap) {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bitmap.compress(CompressFormat.JPEG, 70, stream);
        return stream.toByteArray();
    }
Bitmap icon = BitmapFactory.decodeResource(this.getResources(),
                    R.drawable.pizza);
String iconBase64 = this.getBase64(icon);

解决方案

Try this to bitmap;

public Bitmap convert(String img){
    byte[] b = Base64.decode(img, Base64.DEFAULT);
    return BitmapFactory.decodeByteArray(b, 0, b.length);
}

And this to String

    public String convert(Bitmap bm, int quality){
    ByteArrayOutputStream baos = new ByteArrayOutputStream();  
    bm.compress(Bitmap.CompressFormat.JPEG, quality, baos); 

    byte[] byt = baos.toByteArray(); 
    bm.recycle();
    return Base64.encodeToString(byt, Base64.DEFAULT);
}

Really I don't see any real problems with your code, but these have worked for me so I suggest that you try them and see if that is actually your problem.

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