Couldn't able to connect to amazon dynamo db from android app

Here is my source code snippet which I'm using connect to Amazon dynamo DB CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider( this, // get the context for the current activity
"XXXXX027930", // your AWS Account id
"us-east-1:e7a5fXXc-3c9c-4644-b754-3604188c6d99",// your identity pool id
"arn:aws:iam::31XXX0027930:role/hmo_users",// an authenticated role ARN "arn:aws:iam::31289XXX7930:role/hmo_users", // an unauthenticated role ARN Regions.US_EAST_1 //Region ); //Log.d("LogTag", "my ID is " + credentialsProvider.getIdentityId()); AmazonDynamoDB client = new AmazonDynamoDBClient(credentialsProvider); List l = client.listTables().getTableNames(); for(int i=0;i

I'm getting the below error:

05-01 15:24:11.687: I/System.out(2858): The main activity has been started 05-01 15:24:11.798: I/art(2858): Background sticky concurrent mark sweep GC freed 3058(229KB) AllocSpace objects, 0(0B) LOS objects, 27% free, 826KB/1135KB, paused 93.590ms total 115.769ms 05-01 15:24:11.945: I/Choreographer(2858): Skipped 76 frames! The application may be doing too much work on its main thread. 05-01 15:24:12.065: D/gralloc_goldfish(2858): Emulator without GPU emulation detected. 05-01 15:24:12.222: I/art(2858): Background partial concurrent mark sweep GC freed 2482(150KB) AllocSpace objects, 0(0B) LOS objects, 49% free, 1049KB/2MB, paused 6.325ms total 156.047ms 05-01 15:24:18.140: D/CognitoCachingCredentialsProvider(2858): Loading credentials from SharedPreferences 05-01 15:24:18.140: D/CognitoCachingCredentialsProvider(2858): No valid credentials found in SharedPreferences 05-01 15:24:18.165: D/CognitoCachingCredentialsProvider(2858): Loading credentials from SharedPreferences 05-01 15:24:18.165: D/CognitoCachingCredentialsProvider(2858): No valid credentials found in SharedPreferences 05-01 15:24:18.177: D/AndroidRuntime(2858): Shutting down VM 05-01 15:24:18.178: E/AndroidRuntime(2858): FATAL EXCEPTION: main 05-01 15:24:18.178: E/AndroidRuntime(2858): Process: com.example.hmo, PID: 2858 05-01 15:24:18.178: E/AndroidRuntime(2858): java.lang.IllegalStateException: Could not execute method of the activity 05-01 15:24:18.178: E/AndroidRuntime(2858): at android.view.View$1.onClick(View.java:4007) 05-01 15:24:18.178: E/AndroidRuntime(2858): at android.view.View.performClick(View.java:4756) 05-01 15:24:18.178: E/AndroidRuntime(2858): at android.view.View$PerformClick.run(View.java:19749) 05-01 15:24:18.178: E/AndroidRuntime(2858): at android.os.Handler.handleCallback(Handler.java:739) 05-01 15:24:18.178: E/AndroidRuntime(2858): at android.os.Handler.dispatchMessage(Handler.java:95) 05-01 15:24:18.178: E/AndroidRuntime(2858): at android.os.Looper.loop(Looper.java:135) 05-01 15:24:18.178: E/AndroidRuntime(2858): at android.app.ActivityThread.main(ActivityThread.java:5221) 05-01 15:24:18.178: E/AndroidRuntime(2858): at java.lang.reflect.Method.invoke(Native Method) 05-01 15:24:18.178: E/AndroidRuntime(2858): at java.lang.reflect.Method.invoke(Method.java:372) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 05-01 15:24:18.178: E/AndroidRuntime(2858): Caused by: java.lang.reflect.InvocationTargetException 05-01 15:24:18.178: E/AndroidRuntime(2858): at java.lang.reflect.Method.invoke(Native Method) 05-01 15:24:18.178: E/AndroidRuntime(2858): at java.lang.reflect.Method.invoke(Method.java:372) 05-01 15:24:18.178: E/AndroidRuntime(2858): at android.view.View$1.onClick(View.java:4002) 05-01 15:24:18.178: E/AndroidRuntime(2858): ... 10 more 05-01 15:24:18.178: E/AndroidRuntime(2858): Caused by: android.os.NetworkOnMainThreadException 05-01 15:24:18.178: E/AndroidRuntime(2858): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1147) 05-01 15:24:18.178: E/AndroidRuntime(2858): at java.net.InetAddress.lookupHostByName(InetAddress.java:418) 05-01 15:24:18.178: E/AndroidRuntime(2858): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252) 05-01 15:24:18.178: E/AndroidRuntime(2858): at java.net.InetAddress.getAllByName(InetAddress.java:215) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.HostResolver$1.getAllByName(HostResolver.java:29) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:232) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:124) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:272) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:211) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:373) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.internal.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:106) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.internal.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:208) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.internal.http.DelegatingHttpsURLConnection.getOutputStream(DelegatingHttpsURLConnection.java:218) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.android.okhttp.internal.http.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:25) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.http.UrlHttpClient.createConnection(UrlHttpClient.java:142) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.http.UrlHttpClient.execute(UrlHttpClient.java:60) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.http.AmazonHttpClient.executeHelper(AmazonHttpClient.java:353) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:196) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.services.cognitoidentity.AmazonCognitoIdentityClient.invoke(AmazonCognitoIdentityClient.java:455) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.services.cognitoidentity.AmazonCognitoIdentityClient.getId(AmazonCognitoIdentityClient.java:290) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.auth.AWSAbstractCognitoIdentityProvider.getIdentityId(AWSAbstractCognitoIdentityProvider.java:170) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.auth.AWSAbstractCognitoIdentityProvider.refresh(AWSAbstractCognitoIdentityProvider.java:312) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.auth.AWSBasicCognitoIdentityProvider.refresh(AWSBasicCognitoIdentityProvider.java:77) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.auth.CognitoCredentialsProvider.startSession(CognitoCredentialsProvider.java:533) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.auth.CognitoCredentialsProvider.getCredentials(CognitoCredentialsProvider.java:366) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.auth.CognitoCachingCredentialsProvider.getCredentials(CognitoCachingCredentialsProvider.java:440) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.auth.CognitoCachingCredentialsProvider.getCredentials(CognitoCachingCredentialsProvider.java:76) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.invoke(AmazonDynamoDBClient.java:2918) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.listTables(AmazonDynamoDBClient.java:1372) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient.listTables(AmazonDynamoDBClient.java:1401) 05-01 15:24:18.178: E/AndroidRuntime(2858): at com.example.hmo.MainActivity.storeValues(MainActivity.java:98) 05-01 15:24:18.178: E/AndroidRuntime(2858): ... 13 more 05-01 15:24:22.725: I/Process(2858): Sending signal. PID: 2858 SIG: 9

Can somebody help in resolving this error. Thanks in advance.