Android Volley Callback Example

	public interface VolleyOnEventListener<T> {
	public void onSuccess(T object);
	public void onFailure(Exception e);
	}

view raw OnEventListener.java hosted with ❤ by GitHub

	public class MainActivity extends AppCompatActivity {
	private static final String TAG = "MainActivity";
	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	try {
	VolleyServerRequest order = new VolleyServerRequest(getApplicationContext(), new OnEventListener() {
	@Override
	public void onSuccess(Object object) {
	Log.d(TAG, "onSuccess: "+object.toString());
	}
	@Override
	public void onFailure(Exception e) {
	Log.e(TAG, "onFailure: ", e);
	}
	});
	}catch (Exception e){
	Log.e(TAG, "displayServer: error:",e);
	}
	}
	}

view raw VolleyCallback.java hosted with ❤ by GitHub

	public class VolleyServerRequest {
	Context context;
	private OnEventListener<String> mCallBack;
	public VolleyServerRequest(Context context, OnEventListener callback){
	this.context = context;
	mCallBack = callback;
	setPostRequest();
	}
	public void setPostRequest(){
	RequestQueue queue = Volley.newRequestQueue(this.context);
	String url = "your url";
	StringRequest postRequest = new StringRequest(Request.Method.POST, url,
	new Response.Listener<String>()
	{
	@Override
	public void onResponse(String response) {
	// response
	Log.d("Response", response);
	mCallBack.onSuccess(response);
	}
	},
	new Response.ErrorListener()
	{
	@Override
	public void onErrorResponse(VolleyError error) {
	// error
	Log.d("Error.Response", error.toString());
	mCallBack.onFailure(error);
	}
	}
	) {
	@Override
	protected Map<String, String> getParams()
	{
	Map<String, String> params = new HashMap<String, String>();
	params.put("Key", "value");
	return params;
	}
	@Override
	public Map<String, String> getHeaders(){
	HashMap<String, String> params = new HashMap<String, String>();
	String creds = String.format("%s:%s","Usernmae","Password");
	String auth = "Basic " + Base64.encodeToString(creds.getBytes(), Base64.DEFAULT);
	params.put("Authorization", auth);
	return params;
	}
	};
	queue.add(postRequest);
	}
	}

view raw VolleyServerRequest.java hosted with ❤ by GitHub

Posted in: android,Volley