com.applechip.android.showcase.rest.HttpPostStringActivity.java Source code

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Here is the source code for com.applechip.android.showcase.rest.HttpPostStringActivity.java

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/*
 * Copyright 2010-2014 the original author or authors.
 *
 * 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.
 */

package com.applechip.android.showcase.rest;

import com.applechip.android.showcase.AbstractAsyncActivity;
import com.applechip.android.showcase.R;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.RestTemplate;

import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

/**
 * @author Roy Clarkson
 * @author Helena Edelson
 * @author Pierre-Yves Ricau
 */
public class HttpPostStringActivity extends AbstractAsyncActivity {

    protected static final String TAG = HttpPostStringActivity.class.getSimpleName();

    // ***************************************
    // Activity methods
    // ***************************************
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.http_post_string_activity_layout);

        // Initiate the POST request when the button is clicked
        final Button button = (Button) findViewById(R.id.button_post_string);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                new PostMessageTask().execute();
            }
        });
    }

    // ***************************************
    // Private methods
    // ***************************************
    private void showResult(String result) {
        // display a notification to the user with the response message
        Toast.makeText(this, result, Toast.LENGTH_LONG).show();
    }

    // ***************************************
    // Private classes
    // ***************************************
    private class PostMessageTask extends AsyncTask<Void, Void, String> {

        private String text;

        @Override
        protected void onPreExecute() {
            showLoadingProgressDialog();

            // retrieve the message text from the EditText field
            EditText editText = (EditText) findViewById(R.id.edit_text_message);

            text = editText.getText().toString();
        }

        @Override
        protected String doInBackground(Void... params) {
            try {
                // The URL for making the POST request
                final String url = getString(R.string.base_uri) + "/sendmessage";

                // Create a new RestTemplate instance
                RestTemplate restTemplate = new RestTemplate();
                restTemplate.getMessageConverters().add(new StringHttpMessageConverter());

                // Make the network request, posting the message, expecting a String in response from the server
                String response = restTemplate.postForObject(url, text, String.class);

                // Return the response body to display to the user
                return response;
            } catch (Exception e) {
                Log.e(TAG, e.getMessage(), e);
            }

            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            dismissProgressDialog();
            showResult(result);
        }

    }

}