Ext: Base64ImageDownloader

Author: nostra13

sample/build.gradle

@@ -40,4 +40,4 @@ if (propFile.exists()) {
     }
 } else {
     android.buildTypes.release.signingConfig = null
-}
+}

sample/src/main/java/com/nostra13/universalimageloader/sample/ext/Base64ImageDownloader.java

@@ -0,0 +1,64 @@
+/*******************************************************************************
+ * Copyright 2015 Sergey Tarasevich
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *******************************************************************************/
+package com.nostra13.universalimageloader.sample.ext;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build;
+import android.util.Base64;
+
+import com.nostra13.universalimageloader.core.download.BaseImageDownloader;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * Downloader supporting "base64://..." URIs.
+ * E.g.: "base64://data:image/jpeg;base64,/9j/4AAQSkZ..."
+ *
+ * @author mrleolink, Sergey Tarasevich (nostra13[at]gmail[dot]com)
+ */
+@TargetApi(Build.VERSION_CODES.FROYO)
+public class Base64ImageDownloader extends BaseImageDownloader {
+
+	public static final String BASE64_SCHEME = "base64";
+	public static final String BASE64_URI_PREFIX = BASE64_SCHEME + "://";
+
+	public static final String BASE64_DATA_PREFIX = "base64,";
+
+	public Base64ImageDownloader(Context context) {
+		super(context);
+	}
+
+	public Base64ImageDownloader(Context context, int connectTimeout, int readTimeout) {
+		super(context, connectTimeout, readTimeout);
+	}
+
+	@Override
+	public InputStream getStreamFromOtherSource(String imageUri, Object extra) throws IOException {
+		if (imageUri.startsWith(BASE64_URI_PREFIX)) {
+			return getStreamFormBase64(imageUri, extra);
+		}
+		return super.getStreamFromOtherSource(imageUri, extra);
+	}
+
+	protected InputStream getStreamFormBase64(String imageUri, Object extra) {
+		int dataStartIndex = imageUri.indexOf(BASE64_DATA_PREFIX) + BASE64_DATA_PREFIX.length();
+		String base64 = imageUri.substring(dataStartIndex);
+		return new ByteArrayInputStream(Base64.decode(base64, Base64.DEFAULT));
+	}
+}