StringRequest Volley - Retrieve Response as String

Volley is an Android HTTP networking library. In the previous article, we had a glimpse of the Volley library and performed a POST request using JsonObjectRequest.

In this article, we will fetch the response as string from https://reqres.in/api/users/2 and display it as the TextView text. For this purpose, we will be using StringRequest which makes a GET request to an endpoint and returns the response as a string.

// Build the request
final StringRequest stringRequest = new StringRequest(URL_USER, new Response.Listener<String>() {
    @Override
    public void onResponse(@NonNull String response) {
        // Api call successful
        Log.d(TAG, "Response: " + response);
        // Show the response on the screen
        responseTextView.setText(response);
    }
}, new Response.ErrorListener() {
  @Override
  public void onErrorResponse(@NonNull VolleyError error) {
    // Api call failed
    // Print the error to stacktrace
    error.printStackTrace();
    // Show the error to the user
    Snackbar.make(mainConstraintLayout, "Error: " + error.getMessage(), Snackbar.LENGTH_SHORT).show();
  }
});

// Make the request
Volley.newRequestQueue(this).add(stringRequest);

onResponse callback is triggered when the Api calls succeed and we update the TextView as shown in the image. Otherwise, onErrorResponse is called and we will display a snack message to the user.

volley-main-screen

If you are interested to explore the code, feel free to fork the Volley Request project available on Github.

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