PostActivity.java

package com.survivingwithandroid.volley_tutorial;

/*
 * Copyright (C) 2014 Surviving with Android (http://www.survivingwithandroid.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.HashMap;
import java.util.Map;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.support.v4.app.NavUtils;
import android.annotation.TargetApi;
import android.os.Build;

public class PostActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_post);
		// Show the Up button in the action bar.
		setupActionBar();

		// Start here posting data to remote server
		
						
			final EditText eT = (EditText) findViewById(R.id.paramEdt);
			final TextView tv = (TextView) findViewById(R.id.respTxt);
			
			Button btn = (Button) findViewById(R.id.postBtn);
			
			btn.setOnClickListener(new View.OnClickListener() {
				
				@Override
				public void onClick(View v) {
					String param = eT.getText().toString();
					postData(param, tv);
				}
			});
			
	}
	
	
	private void postData(final String param, final TextView tv) {
			
			
			RequestQueue rq = Volley.newRequestQueue(this);
			
			StringRequest postReq = new StringRequest(Request.Method.POST, "http://httpbin.org/post", new Response.Listener<String>() {

				@Override
				public void onResponse(String response) {
					tv.setText(response); // We set the response data in the TextView
				}
			}, new Response.ErrorListener() {

				@Override
				public void onErrorResponse(VolleyError error) {
					System.out.println("Error ["+error+"]");
					
				}
			})  {

				@Override
				protected Map<String, String> getParams() throws AuthFailureError {
					Map<String, String> params = new HashMap<String, String>();
					
					params.put("param1", param);
					return params;
				}
				
			};
			
			rq.add(postReq);
		
	}

	/**
	 * Set up the {@link android.app.ActionBar}, if the API is available.
	 */
	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
	private void setupActionBar() {
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
			getActionBar().setDisplayHomeAsUpEnabled(true);
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.post, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case android.R.id.home:
			// This ID represents the Home or Up button. In the case of this
			// activity, the Up button is shown. Use NavUtils to allow users
			// to navigate up one level in the application structure. For
			// more details, see the Navigation pattern on Android Design:
			//
			// http://developer.android.com/design/patterns/navigation.html#up-vs-back
			//
			NavUtils.navigateUpFromSameTask(this);
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

}