Android Volley – HTTP Library for Networking

Requires internet permission for accessing content.

<!-- requires internet permission -->
<uses-permission android:name="android.permission.INTERNET" />

dependencies {
    ...
    implementation 'com.android.volley:volley:1.1.1'
}

Java code for simple get request

final TextView mTextView = (TextView) findViewById(R.id.text);
// ...

// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(this);
String url ="http://www.google.com";

// Request a string response from the provided URL.
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
            new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
        // Display the first 500 characters of the response string.
        mTextView.setText("Response is: "+ response.substring(0,500));
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        mTextView.setText("That didn't work!");
    }
});

// Add the request to the RequestQueue.
queue.add(stringRequest);

Textview is for reference only, can be replaced with your custom url.

Java code for post request

        //TODO- change url
        String url = "YOUR-URL";

        final StringRequest postRequest = new StringRequest(Request.Method.POST, url,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        //TODO-handle response data
                       /**HANDLE YOUR RESPONSE DATA HERE**/


                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        /**HANDLE NETWORK ERROR**/
                        error.printStackTrace();
                    }
                }
        ) {
            @Override
            protected Map<String, String> getParams() {
                Map<String, String> params = new HashMap<>();
                //TODO-add your custom parameters
                params.put("parameter-key","parameter-value");
                return params;
            }
        };
        Volley.newRequestQueue(listener).add(postRequest);