java.lang.NoClassDefFoundError：使用Amazon S3上传图片时Android上的Pre-Lollipop上的com.google.gson.stream.JsonReader错误

Question

Uploading image to amazon s3 bucket working fine with android 5 and above but getting Gson Error on Pre-Lollipop. Below is the code i am working with.

Error:

 FATAL EXCEPTION: TransferSerivce-AWSTransferUpdateHandlerThread
    java.lang.NoClassDefFoundError: com.google.gson.stream.JsonReader
    at com.amazonaws.util.json.GsonFactory$GsonReader.<init>(GsonFactory.java:50)
    at com.amazonaws.util.json.GsonFactory.getJsonReader(GsonFactory.java:38)
    at com.amazonaws.util.json.JsonUtils.getJsonReader(JsonUtils.java:101)
    at com.amazonaws.util.json.JsonUtils.jsonToMap(JsonUtils.java:127)
    at com.amazonaws.util.json.JsonUtils.jsonToMap(JsonUtils.java:166)
    at com.amazonaws.mobileconnectors.s3.transferutility.TransferRecord.updateFromDB(TransferRecord.java:134)
    at com.amazonaws.mobileconnectors.s3.transferutility.TransferDBUtil.getTransferById(TransferDBUtil.java:669)
    at com.amazonaws.mobileconnectors.s3.transferutility.TransferService.execCommand(TransferService.java:284)
    at com.amazonaws.mobileconnectors.s3.transferutility.TransferService$UpdateHandler.handleMessage(TransferService.java:224)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:137)
    at android.os.HandlerThread.run(HandlerThread.java:60)

This is the code I am using to upload the Image:

 ClientConfiguration clientConfig = new ClientConfiguration();
                    clientConfig.setConnectionTimeout(120000); // setting connection time out to be 2 minutes.
                    clientConfig.withConnectionTimeout(120000); // setting connection timeout to be 2 minutes.
                    AmazonS3Client awsClient = new AmazonS3Client(
                            new BasicAWSCredentials("accessKey", "secreatKey"),
                            clientConfig);
                    imagePath = "A" + "/" + compressedFile.getName();
                    TransferUtility transferUtility = new TransferUtility(awsClient, getBaseContext());
                    TransferObserver observer = null;
                    try {
                        observer = transferUtility.upload("bucket-name", imagePath, compressedFile);
                    } catch (Exception e) {

                        Log.e(Tag,""+e.toString());
                    }

the above code working fine with lollipop and above but creating issue with pre lollipop

added Gson Dependency too thinking that it might help. But no luck

Gradle Dependencies:

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'

compile 'com.android.support:appcompat-v7:23.2.1'
compile 'com.android.support:design:23.2.1'
compile 'commons-codec:commons-codec:1.5'
compile 'com.google.android.gms:play-services:8.4.0'

compile 'com.amazonaws:aws-android-sdk-core:2.2.14'
compile 'com.amazonaws:aws-android-sdk-cognito:2.2.14'
compile 'com.amazonaws:aws-android-sdk-s3:2.2.14'

compile 'com.android.support:multidex:1.0.1'
compile 'com.google.code.gson:gson:2.6.2' // added gson hoping 
}

searched a lot but no clue. Any help deeply appreciated.

Answer 1

I don't have experience with android platform. But the guide here might help you to solve the issue. Please note the following warning mentioned in the set up guide.

For Android, you MUST place the jar files in a directory named "libs" so that the APK packager can find them. Otherwise, you will get a NoClassDefFoundError error at runtime.