com.johan.voting.VotingActivity.java Source code

Introduction

Here is the source code for com.johan.voting.VotingActivity.java

Source

/*  Voting - Android-App fr ein Abstimmungssystem in Physikvorlesungen
Copyright (C) 2014  Johan v. Forstner
    
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with this program.  If not, see [http://www.gnu.org/licenses/]. */
package com.johan.voting;

import java.util.ArrayList;

import org.holoeverywhere.app.Activity;
import org.holoeverywhere.widget.Button;
import org.holoeverywhere.widget.Toast;
import org.json.JSONException;
import org.json.JSONObject;

import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;

import com.echo.holographlibrary.Bar;
import com.echo.holographlibrary.BarGraph;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.AsyncHttpResponseHandler;
import com.loopj.android.http.JsonHttpResponseHandler;
import com.loopj.android.http.RequestParams;

public class VotingActivity extends Activity {

    private static AsyncHttpClient client = new AsyncHttpClient();;
    private static final String VOTING_URL = "http://www.ieap.uni-kiel.de/plasma/ag-kersten/vote/vote.php";
    private BarGraph graph;
    private Button a;
    private Button b;
    private Button c;
    private Button d;
    private boolean continueToLoad = true;
    private Handler handler = new Handler();
    private Runnable runnable;

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

        graph = (BarGraph) findViewById(R.id.bargraph);
        a = (Button) findViewById(R.id.buttonA);
        b = (Button) findViewById(R.id.buttonB);
        c = (Button) findViewById(R.id.buttonC);
        d = (Button) findViewById(R.id.buttonD);

        runnable = new Runnable() {
            @Override
            public void run() {
                if (continueToLoad) {
                    loadVoting();
                    handler.postDelayed(this, 1000);
                }
            }
        };

        a.setOnClickListener(voteOnClickListener("A"));
        b.setOnClickListener(voteOnClickListener("B"));
        c.setOnClickListener(voteOnClickListener("C"));
        d.setOnClickListener(voteOnClickListener("D"));
    }

    private OnClickListener voteOnClickListener(final String vote) {
        return new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                vote(vote);
            }
        };
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.voting, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        switch (id) {
        case R.id.action_info:
            Intent intent = new Intent(this, InfoActivity.class);
            startActivity(intent);
            break;
        }
        return super.onOptionsItemSelected(item);
    }

    private void loadVoting() {
        RequestParams params = new RequestParams();
        params.put("action", "getResult");
        client.post(VOTING_URL, params, new JsonHttpResponseHandler() {
            @Override
            public void onSuccess(JSONObject votingStatus) {

                //Add Bars
                ArrayList<Bar> bars = new ArrayList<Bar>();
                Log.d("Voting", votingStatus.toString());
                try {
                    bars.add(createBar(votingStatus.getInt("A"), "A"));
                    bars.add(createBar(votingStatus.getInt("B"), "B"));
                    bars.add(createBar(votingStatus.getInt("C"), "C"));
                    bars.add(createBar(votingStatus.getInt("D"), "D"));
                } catch (JSONException e) {
                    e.printStackTrace();
                }

                graph.setBars(bars);

                //Buttons
                try {
                    boolean pollOpen = votingStatus.getInt("status") == 1 ? true : false;
                    setButtonsEnabled(pollOpen);
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        });
    }

    private Bar createBar(int value, String name) {
        Bar bar = new Bar();
        bar.setColor(Color.parseColor("#FFBB33"));
        bar.setLabelColor(Color.parseColor("#000000"));
        bar.setValue(value);
        bar.setValueString(String.valueOf(value));
        bar.setName(name);
        return bar;
    }

    private void vote(String vote) {
        setButtonsEnabled(false);
        RequestParams params = new RequestParams();
        params.put("vote", vote);
        client.post(VOTING_URL, params, new AsyncHttpResponseHandler() {
            @Override
            public void onSuccess(String response) {
                Toast.makeText(VotingActivity.this, "Stimme abgegeben", Toast.LENGTH_SHORT).show();
                setButtonsEnabled(true);
            }
        });
    }

    private void setButtonsEnabled(boolean enabled) {
        a.setEnabled(enabled);
        b.setEnabled(enabled);
        c.setEnabled(enabled);
        d.setEnabled(enabled);
    }

    @Override
    public void onPause() {
        super.onPause();
        continueToLoad = false;
    }

    @Override
    public void onResume() {
        super.onResume();
        continueToLoad = true;
        handler.post(runnable);
    }

}