How to fetch and read a JSON file located on server?

Question

I have a simple json file located on server path "myserver/samplejsontotest.json"

content of a json file is:

{"apps": [{"appName": "App1", "version": 1.0}, {"appName": "App2", "version": 4.6}]}

I want to load the json file, parse and read it's content and show App names when I click a button on Main activity. Below is my code in MainActivity.java:

public class MainActivity extends AppCompatActivity {

String path = "myserver/samplejsontotest.json";
JSONObject reader = new JSONObject(path);

public MainActivity() throws JSONException {
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button btn1 = (Button) findViewById(R.id.button);

    btn1.setOnClickListener(new View.OnClickListener() {

        public void onClick(View view) {

           // Log.d("Button1", "Clicked on Button1");
        }

    });
}

public void parseJson() throws JSONException {

    JSONObject sys  = reader.getJSONObject("apps");
    String app = sys.getString("appName");
    String version = sys.getString("version");
}

}

Please help.

Answer 1

Try the Rest Template of Spring.

Just create a java class that represents the json structure, and consume the json file as a GET method.

Reference: https://docs.spring.io/spring-android/docs/1.0.0.M1/reference/html/rest-template.html