no suitable HttpMessageConverter found for response type [com.enimbus.book.Post] and content type [text/html;charset=UTF-8] - rest

Question

I am developing android app using restful service. I call get request from a url and it returns content type application/json;charset=UTF-8. I want to show return json data in my android view. to do that I use below code in android mainactivity
private class HttpRequestTask extends AsyncTask<Void, Void, Post> {
#Override
protected Post doInBackground(Void... params) {
try {
final String url = "http://192.168.0.100:8080/rposts/view/46";
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
Post post = restTemplate.getForObject(url, Post.class);
return post;
} catch (Exception e) {
Log.e("MainActivity", e.getMessage(), e);
}
return null;
}
#Override
protected void onPostExecute(Post post) {
TextView PostIdText = (TextView) findViewById(R.id.post_title);
TextView PostContentText = (TextView) findViewById(R.id.post_body);
PostIdText.setText(post.getTitle());
PostContentText.setText(post.getBody());
}
}
when I run my app it gives an error
Could not extract response: no suitable HttpMessageConverter found for response type [com.enimbus.book.Post] and content type [text/html;charset=UTF-8]
org.springframework.web.client.RestClientException: Could not extract response: no suitable HttpMessageConverter found for response type [com.enimbus.book.Post] and content type [text/html;charset=UTF-8]
at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:79)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:484)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:439)
at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:237)
at com.enimbus.book.MainActivity$HttpRequestTask.doInBackground(MainActivity.java:123)
at com.enimbus.book.MainActivity$HttpRequestTask.doInBackground(MainActivity.java:116)
at android.os.AsyncTask$2.call(AsyncTask.java:288)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:841)
11-02 14:34:39.194 27146-27146/com.enimbus.book D/AndroidRuntime: Shutting down VM
11-02 14:34:39.194 27146-27146/com.enimbus.book W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0x41e90da0)
11-02 14:34:39.204 27146-27146/com.enimbus.book E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.enimbus.book, PID: 27146
java.lang.NullPointerException
at com.enimbus.book.MainActivity$HttpRequestTask.onPostExecute(MainActivity.java:137)
at com.enimbus.book.MainActivity$HttpRequestTask.onPostExecute(MainActivity.java:116)
at android.os.AsyncTask.finish(AsyncTask.java:632)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5653)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
at dalvik.system.NativeStart.main(Native Method)
I am using below dependencies in gradle app
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.4.0'
compile 'com.android.support:design:23.4.0'
compile 'org.springframework.android:spring-android-rest-template:1.0.1.RELEASE'
compile 'com.fasterxml.jackson.core:jackson-databind:2.3.2'
}
returned json data when I test with postman
{
"id": 46,
"title": "hellov",
"slug": "tharu",
"postedOn": "08/12/2016 3:04:58 PM",
"keywords": [
"i"
],
"tags": [
"love"
],
"active": true,
"author": {
"id": 20,
"firstName": "Tharindu",
"lastName": "Gihan",
"email": "gihan#gmail.com"
},
"teaser": "<p>to</p>",
"body": "<p>you</p>"
}
Server side spring boot rest controller
package com.gihangreen.controller.rest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.gihangreen.domain.Post;
import com.gihangreen.service.CommentService;
import com.gihangreen.service.PostService;
#RestController
#RequestMapping("/rposts")
public class PostRestController {
private PostService postService;
private CommentService commentService;
#Autowired
public PostRestController(PostService postService, CommentService commentService) {
super();
this.postService = postService;
this.commentService = commentService;
}
//get all posts
#RequestMapping( value = "/list", method = RequestMethod.GET )
public Iterable<Post> list(){
return postService.list();
}
//get post content by id
#RequestMapping(value="/view/{id}", method = RequestMethod.GET)
public Post read(#PathVariable(value = "id") long id) {
return postService.get(id);
}
//get post by author id
#RequestMapping(value="/byAuthor/{id}", method = RequestMethod.GET)
public Iterable<Post> byAuthor(#PathVariable(value = "id") long id) {
return postService.listByAuthor(id);
}
//search post by string
#RequestMapping(value="/search", method = RequestMethod.GET)
public Iterable<Post> search(#RequestParam("search") String search) {
return postService.searching(search);
}
}
How I fixed this issue? help

Answer 1

Might be better to first see what the data is being sent back?
CURL http://192.168.0.100:8080/rposts/view/46 -v