blocks|key|1021454|text|你基本上可以使用一些其他的内置方法来还原你的代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1021455|byte[]+decodedString+=+Base64.decode(encodedImage,+Base64.DEFAULT);
Bitmap+decodedByte+=+BitmapFactory.decodeByteArray(decodedString,+0,+decodedString.length);+|code-block|syntax|javascript|1021456|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can just basically revert your code using some other built in methods.

<pre><code>byte[] decodedString = Base64.decode(encodedImage, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length); 
</code></pre>

blocks|key|806832|text|这是一个非常老的帖子，但我想分享这个答案，因为我花了很多开发时间来管理@Anirudh所面临的BitmapFactory.decodeByteArray()的NULL返回。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|806833|如果encodedImage字符串是JSON响应，则只需使用Base64.URL_SAFE而不是Base64.DEAULT|806834|byte[]+decodedString+=+Base64.decode(encodedImage,+Base64.URL_SAFE);
Bitmap+decodedByte+=+BitmapFactory.decodeByteArray(decodedString,+0,+decodedString.length);|code-block|syntax|javascript|806835|entityMap^0|1B|V|27|4|0|2|C|I|4|U|F|1C|D|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|N|$]]

This is a very old thread but thought to share this answer as it took lot of my development time to manage <code>NULL</code> return of <code>BitmapFactory.decodeByteArray()</code> as @Anirudh has faced.

If the <code>encodedImage</code> string is a <code>JSON</code> response, simply use <code>Base64.URL_SAFE</code> instead of <code>Base64.DEAULT</code>

<pre><code>byte[] decodedString = Base64.decode(encodedImage, Base64.URL_SAFE);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
</code></pre>

blocks|key|806881|text|要进行在线检查，您可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|806882|http://codebeautify.org/base64-to-image-converter|offset|length|806883|您可以像这样将字符串转换为图像|806884|import+android.graphics.Bitmap;
import+android.graphics.BitmapFactory;
import+android.support.v7.app.AppCompatActivity;
import+android.os.Bundle;
import+android.util.Base64;
import+android.widget.ImageView;

import+java.io.ByteArrayOutputStream;

public+class+MainActivity+extends+AppCompatActivity+{

++++@Override
++++protected+void+onCreate(Bundle+savedInstanceState)+{
++++++++super.onCreate(savedInstanceState);
++++++++setContentView(R.layout.activity_main);

++++++++ImageView+image+=(ImageView)findViewById(R.id.image);

++++++++//encode+image+to+base64+string
++++++++ByteArrayOutputStream+baos+=+new+ByteArrayOutputStream();
++++++++Bitmap+bitmap+=+BitmapFactory.decodeResource(getResources(),+R.drawable.logo);
++++++++bitmap.compress(Bitmap.CompressFormat.JPEG,+100,+baos);
++++++++byte[]+imageBytes+=+baos.toByteArray();
++++++++String+imageString+=+Base64.encodeToString(imageBytes,+Base64.DEFAULT);

++++++++//decode+base64+string+to+image
++++++++imageBytes+=+Base64.decode(imageString,+Base64.DEFAULT);
++++++++Bitmap+decodedImage+=+BitmapFactory.decodeByteArray(imageBytes,+0,+imageBytes.length);
++++++++image.setImageBitmap(decodedImage);
++++}
}|code-block|syntax|javascript|806885|http://www.thecrazyprogrammer.com/2016/10/android-convert-image-base64-string-base64-string-image.html|806886|entityMap|0|LINK|mutability|MUTABLE|url|1^0|0|0|1D|0|0|0|0|0|2U|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|9|@$D|14|E|15|1|16]]|A|$]]|$1|O|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|C]]|V|$5|R|S|T|A|$U|N]]]]

To check online you can use 

<a href="http://codebeautify.org/base64-to-image-converter" rel="noreferrer">http://codebeautify.org/base64-to-image-converter</a>

You can convert string to image like this way

<pre><code>import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Base64;
import android.widget.ImageView;

import java.io.ByteArrayOutputStream;

public class MainActivity extends AppCompatActivity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 ImageView image =(ImageView)findViewById(R.id.image);

 //encode image to base64 string
 ByteArrayOutputStream baos = new ByteArrayOutputStream();
 Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.logo);
 bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
 byte[] imageBytes = baos.toByteArray();
 String imageString = Base64.encodeToString(imageBytes, Base64.DEFAULT);

 //decode base64 string to image
 imageBytes = Base64.decode(imageString, Base64.DEFAULT);
 Bitmap decodedImage = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);
 image.setImageBitmap(decodedImage);
 }
}
</code></pre>

<a href="http://www.thecrazyprogrammer.com/2016/10/android-convert-image-base64-string-base64-string-image.html" rel="noreferrer">http://www.thecrazyprogrammer.com/2016/10/android-convert-image-base64-string-base64-string-image.html</a>

blocks|key|806905|text|我已经找到了这个简单的解决方案|type|unstyled|depth|inlineStyleRanges|entityRanges|data|806906|要从位图转换为Base64，请使用此方法。|806907|private+String+convertBitmapToBase64(Bitmap+bitmap)+{
++++ByteArrayOutputStream+byteArrayOutputStream+=+new+ByteArrayOutputStream();
++++bitmap.compress(Bitmap.CompressFormat.PNG,+100,+byteArrayOutputStream);
++++byte[]+byteArray+=+byteArrayOutputStream+.toByteArray();
++++return+Base64.encodeToString(byteArray,+Base64.DEFAULT);
}|code-block|syntax|javascript|806908|从Base64转换为位图或还原。|806909|private+Bitmap+convertBase64ToBitmap(String+b64)+{
++++byte[]+imageAsBytes+=+Base64.decode(b64.getBytes(),+Base64.DEFAULT);
++++return+BitmapFactory.decodeByteArray(imageAsBytes,+0,+imageAsBytes.length);
}|806910|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I've found this easy solution

To convert from bitmap to Base64 use this method.

<pre><code>private String convertBitmapToBase64(Bitmap bitmap) {
 ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
 bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
 byte[] byteArray = byteArrayOutputStream .toByteArray();
 return Base64.encodeToString(byteArray, Base64.DEFAULT);
}
</code></pre>

To convert from Base64 to bitmap OR revert.

<pre><code>private Bitmap convertBase64ToBitmap(String b64) {
 byte[] imageAsBytes = Base64.decode(b64.getBytes(), Base64.DEFAULT);
 return BitmapFactory.decodeByteArray(imageAsBytes, 0, imageAsBytes.length);
}
</code></pre>

blocks|key|806924|text|这是一个很好的示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|806925|String+base64String+=+"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIAAAACACAYAAADDPmHLAA...";
String+base64Image+=+base64String.split(",")[1];
byte[]+decodedString+=+Base64.decode(base64Image,+Base64.DEFAULT);
Bitmap+decodedByte+=+BitmapFactory.decodeByteArray(decodedString,+0,+decodedString.length);
imageView.setImageBitmap(decodedByte);|code-block|syntax|javascript|806926|示例位于：https://freakycoder.com/android-notes-44-how-to-convert-base64-string-to-bitmap-53f98d5e57af|offset|length|806927|这是过去唯一能为我工作的代码。|806928|entityMap|0|LINK|mutability|MUTABLE|url|https://freakycoder.com/android-notes-44-how-to-convert-base64-string-to-bitmap-53f98d5e57af^0|0|0|5|2K|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@$I|X|J|Y|1|Z]]|A|$]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

This is a great sample:
<pre><code>String base64String = &quot;data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIAAAACACAYAAADDPmHLAA...&quot;;
String base64Image = base64String.split(&quot;,&quot;)[1];
byte[] decodedString = Base64.decode(base64Image, Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
imageView.setImageBitmap(decodedByte);
</code></pre>
Sample found at: <a href="https://freakycoder.com/android-notes-44-how-to-convert-base64-string-to-bitmap-53f98d5e57af" rel="nofollow noreferrer">https://freakycoder.com/android-notes-44-how-to-convert-base64-string-to-bitmap-53f98d5e57af</a>
This is the only code that worked for me in the past.

blocks|key|806950|text|我已经尝试了所有的解决方案，这个方案对我很有效|type|unstyled|depth|inlineStyleRanges|entityRanges|data|806951|let+temp+=+base64String.components(separatedBy:+",")
let+dataDecoded+:+Data+=+Data(base64Encoded:+temp[1],+options:+
+.ignoreUnknownCharacters)!
let+decodedimage+=+UIImage(data:+dataDecoded)

yourImage.image+=+decodedimage|code-block|syntax|javascript|806952|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I have tried all the solutions and this one worked for me
<pre><code>let temp = base64String.components(separatedBy: &quot;,&quot;)
let dataDecoded : Data = Data(base64Encoded: temp[1], options: 
 .ignoreUnknownCharacters)!
let decodedimage = UIImage(data: dataDecoded)

yourImage.image = decodedimage
</code></pre>

blocks|key|1021639|text|在Kotlin中，你可以像下面这样使用扩展函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1021640|fun+String.base64ToByteCode()+=+Base64.decode(this.substring(this.indexOf(",")++%2B+1),+Base64.DEFAULT)|code-block|syntax|javascript|1021641|并将其称为bellow：|1021642|yourBase64String.base64ToByteCode()|1021643|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In Kotlin you can use extension function as bellow:
<pre><code>fun String.base64ToByteCode() = Base64.decode(this.substring(this.indexOf(&quot;,&quot;) + 1), Base64.DEFAULT)
</code></pre>
and call it as bellow:
<pre><code>yourBase64String.base64ToByteCode()
</code></pre>

I have a Base64 String that represents a BitMap image.

I need to transform that String into a BitMap image again to use it on a ImageView in my Android app

How to do it?

This is the code that I use to transform the image into the base64 String: 

<pre><code>//proceso de transformar la imagen BitMap en un String:
//android:src="c:\logo.png"
Resources r = this.getResources();
Bitmap bm = BitmapFactory.decodeResource(r, R.drawable.logo);
ByteArrayOutputStream baos = new ByteArrayOutputStream(); 
bm.compress(Bitmap.CompressFormat.PNG, 100, baos); //bm is the bitmap object 
byte[] b = baos.toByteArray();
//String encodedImage = Base64.encode(b, Base64.DEFAULT);
encodedImage = Base64.encodeBytes(b);
</code></pre>

How to convert a Base64 string into a Bitmap image to show it in a ImageView?

Kotlin

JSON

我有一个表示BitMap图像的Base64字符串。我需要再次将该字符串转换为BitMap图像，才能在我的安卓应用程序的ImageView上使用它该怎么做呢？这是我用来将图像转换为base64字符串的代码：//proceso de transformar la imagen BitMap en un String://a...

问如何将Base64字符串转换为位图图像以在ImageView中显示？
EN

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问如何将Base64字符串转换为位图图像以在ImageView中显示？
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