Retrofit show json Response in ListView very easy and short

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json response shown in listview(Retrofit)

Show json Response in ListView (Retrofit):

Step 1 : create Rest Interface like below attached find it.

Step 2 : create MainActivity like below attached find it.

Step 3 : create layout file like below attached find it.

Step 4: create gradle add it and (Sync) it.

Step 4 : Run execute and watch the output in layout. Over.

Step 1: 

public interface DetailsAPI {
    @GET("/key/value/one/two")
    void insertUser(Callback<JsonObject> jsonObjectCallback);
}

Step 2:

public class MainActivity extends AppCompatActivity {
    TextView tv;
    ListView listView;
    List<String> stringList = new ArrayList<>();
    public static final String Root_url = "http://echo.jsontest.com/";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv = (TextView) findViewById(R.id.tv_response);
        listView = (ListView) findViewById(R.id.listview);
        insertUser();
        ArrayAdapter<String> stringArrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, stringList);
        listView.setAdapter(stringArrayAdapter);
    }

    private void insertUser() {
        RestAdapter adapter = new RestAdapter.Builder().setEndpoint(Root_url).build();
        DetailsAPI api = adapter.create(DetailsAPI.class);
        api.insertUser(new Callback<JsonObject>() {
            @Override
            public void success(JsonObject jsonObject, Response response) {
                if (response.getStatus() == 200)
                    tv.setText("You got the data");
                String jsonResponse = jsonObject.get("one").getAsString();
                stringList.add(jsonResponse);
                jsonResponse = jsonObject.get("key").getAsString();
                stringList.add(jsonResponse);
                //*********************Json response  is too short so the same above values are stored in list array repeatedly.... **************
                jsonResponse = jsonObject.get("one").getAsString();
                stringList.add(jsonResponse);
                jsonResponse = jsonObject.get("key").getAsString();
                stringList.add(jsonResponse);
                jsonResponse = jsonObject.get("one").getAsString();
                stringList.add(jsonResponse);
                jsonResponse = jsonObject.get("key").getAsString();
                stringList.add(jsonResponse);
            }

            public void failure(RetrofitError error) {
                Toast.makeText(MainActivity.this, "try again!", Toast.LENGTH_SHORT).show();
            }
        });
    }
}

Step 3:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello Response here"
        android:textColor="#ff2323"
        android:textSize="22sp"
        android:id="@+id/tv_response" />
    <ListView
        android:id="@+id/listview"
        android:layout_below="@+id/tv_response"
        android:layout_width="match_parent"
        android:layout_height="100dp">
    </ListView>
</RelativeLayout>

Step 4:

after put this line don't forget to sync it.

dependencies {

compile 'com.squareup.retrofit:retrofit:1.9.0'

}