Android Open Source - ClientServerRESTDemo Main Activity

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License

The source code is released under:

Apache License

Java Source Code

/*
 * Copyright (c) 2013 Aaron Lobo, OA Digital
 * //  w w w. j  av a2 s . c om
 * 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.oadigital.clientserverrestdemo;

import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

  Button buttonGetData = null;
  EditText editTextSearchString = null;
  TextView textViewFirstName = null;
  TextView textViewLastName = null;
  TextView textViewAge = null;
  TextView textViewPoints = null;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    buttonGetData = (Button) findViewById(R.id.buttonGetData);
    editTextSearchString = (EditText) findViewById(R.id.editTextSearchString);
    textViewFirstName = (TextView) findViewById(R.id.textViewFirstName);
    textViewLastName = (TextView) findViewById(R.id.textViewLastName);
    textViewAge = (TextView) findViewById(R.id.textViewAge);
    textViewPoints = (TextView) findViewById(R.id.textViewPoints);

    //Setup the Button's OnClickListener
    buttonGetData.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        //Get the data
        DoPOST mDoPOST = new DoPOST(MainActivity.this, editTextSearchString.getText().toString());
        mDoPOST.execute("");
        buttonGetData.setEnabled(false);
      }
    });

  }

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

  public class DoPOST extends AsyncTask<String, Void, Boolean>{

    Context mContext = null;
    String strNameToSearch = "";
    
    //Result data
    String strFirstName;
    String strLastName;
    int intAge;
    int intPoints;
    
    Exception exception = null;
    
    DoPOST(Context context, String nameToSearch){
      mContext = context;
      strNameToSearch = nameToSearch;
    }

    @Override
    protected Boolean doInBackground(String... arg0) {

      try{

        //Setup the parameters
        ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
        nameValuePairs.add(new BasicNameValuePair("FirstNameToSearch", strNameToSearch));  
        //Add more parameters as necessary

        //Create the HTTP request
        HttpParams httpParameters = new BasicHttpParams();

        //Setup timeouts
        HttpConnectionParams.setConnectionTimeout(httpParameters, 15000);
        HttpConnectionParams.setSoTimeout(httpParameters, 15000);      

        HttpClient httpclient = new DefaultHttpClient(httpParameters);
        HttpPost httppost = new HttpPost("http://192.168.1.6/clientservertest/login.php");
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));        
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();

        String result = EntityUtils.toString(entity);
        
        // Create a JSON object from the request response
        JSONObject jsonObject = new JSONObject(result);

        //Retrieve the data from the JSON object
        strFirstName = jsonObject.getString("FirstName");
        strLastName = jsonObject.getString("LastName");
        intAge = jsonObject.getInt("Age");
        intPoints = jsonObject.getInt("Points");

      }catch (Exception e){
        Log.e("ClientServerDemo", "Error:", e);
        exception = e;
      }

      return true;
    }

    @Override
    protected void onPostExecute(Boolean valid){
      //Update the UI
      textViewFirstName.setText("First Name: " + strFirstName);
      textViewLastName.setText("Last Name: " + strLastName);
      textViewAge.setText("Age: " + intAge);
      textViewPoints.setText("Points: " + intPoints);  
      
      buttonGetData.setEnabled(true);
      
      if(exception != null){
        Toast.makeText(mContext, exception.getMessage(), Toast.LENGTH_LONG).show();
      }
    }

  }
}

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