Consuming-API-in-Andriod

This repository contains HttpUrlConnection and Volley based application example. In this you will find implementation of both ways to consume API. This repository show examples to send receive the data in both cases.

DEMO

HttpUrlConnection

Fetching data

1. Checking for internet connectivity using connectivity manager public boolean isDeviceConnected(){ connectivityManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE); NetworkInfo [] networkInfo = connectivityManager.getAllNetworkInfo(); for(NetworkInfo info : networkInfo){ if(info.getState()== NetworkInfo.State.CONNECTED){ return true; }}
2. Fetching data from an API public String getDataFromAPI(String url_string){ try { URL url = new URL(url_string); HttpURLConnection httpURLConnection =(HttpURLConnection) url.openConnection(); httpURLConnection.connect(); InputStream inputStream = httpURLConnection.getInputStream(); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream)); while ((line = bufferedReader.readLine())!=null){ readData+=line; } return readData; } catch (MalformedURLException e) { return e.getMessage(); } catch (IOException e) { return e.getMessage(); } }

3.Start the thread and fetch data public void startThreadForGettingDataUsingHttp(){ Thread thread = new Thread(new Runnable() { @Override public void run() { Log.d("network","Loading data"); String data = getDataFromAPI(url_string); Log.d("network",data); } }); thread.start(); }

Volly

1. Add dependency: com.android.volley:volley:1.2.1

Fetching data

public void getDataUsingVolley(String url_string){ RequestQueue queue = Volley.newRequestQueue(this); StringRequest stringRequest = new StringRequest(Request.Method.GET, url_string, new Response.Listener () { @Override public void onResponse(String response) { Log.d("response",response); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.d("response",error.getMessage()); } }); queue.add(stringRequest); }

POSTING DATA

public void postData(String url_string){ RequestQueue queue = Volley.newRequestQueue(this); StringRequest stringRequest = new StringRequest(Request.Method.POST, url_string, new Response.Listener () { @Override public void onResponse(String response) { Log.d("response",response); response_txt.setText(response); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.d("response","Error is : "+error.getMessage()); response_txt.setText(error.getMessage()); } }){ @Nullable @Override protected Map getParams() throws AuthFailureError { HashMap map = new HashMap<>(); map.put("userEmail",userEmail.getText().toString()); map.put("userPassword",userPassword.getText().toString()); map.put("userFirstName",userFirstName.getText().toString()); map.put("userLastName",userLastName.getText().toString()); map.put("userMobile",userMobile.getText().toString()); return map; } }; queue.add(stringRequest); }