Throw exception if smack-java7 is loaded on Android

smack-core/src/main/java/org/jivesoftware/smack/util/SystemUtil.java

@@ -0,0 +1,28 @@
+/**
+ *
+ * Copyright 2015 Florian Schmaus
+ *
+ * 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 org.jivesoftware.smack.util;
+
+public class SystemUtil {
+
+    public static final String PROPERTY_JAVA_VENDOR = "java.vendor";
+
+    public static boolean onAndroid() {
+        String vendor = System.getProperty(PROPERTY_JAVA_VENDOR);
+        return vendor.contains("Android");
+    }
+
+}

smack-java7/src/main/java/org/jivesoftware/smack/java7/Java7SmackInitializer.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2014 the original author or authors
+ * Copyright 2014-2015 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@ import org.jivesoftware.smack.SmackConfiguration;
 import org.jivesoftware.smack.initializer.SmackInitializer;
 import org.jivesoftware.smack.util.DNSUtil;
 import org.jivesoftware.smack.util.StringTransformer;
+import org.jivesoftware.smack.util.SystemUtil;
 import org.jivesoftware.smack.util.stringencoder.Base64;
 import org.jivesoftware.smack.util.stringencoder.Base64UrlSafeEncoder;
 import org.jivesoftware.smack.util.stringencoder.java7.Java7Base64Encoder;
@@ -31,6 +32,14 @@ public class Java7SmackInitializer implements SmackInitializer {
 
     @Override
     public List<Exception> initialize() {
+        if (SystemUtil.onAndroid()) {
+            // @formatter:off
+            throw new RuntimeException(
+                            "You need to remove the smack-java7 dependency/jar from your build, " +
+                            "as it does not run on Android. " +
+                            "Use smack-android instead.");
+            // @formatter:on
+        }
         SmackConfiguration.setDefaultHostnameVerifier(new Java7HostnameVerifier());
         Base64.setEncoder(Java7Base64Encoder.getInstance());
         Base64UrlSafeEncoder.setEncoder(Java7Base64UrlSafeEncoder.getInstance());