ca.ualberta.app.activity.MainActivity.java Source code

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Here is the source code for ca.ualberta.app.activity.MainActivity.java

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/*
 * Copyright 2014 Anni Dai
 * Copyright 2014 Bicheng Yan
 * Copyright 2014 Liwen Chen
 * Copyright 2014 Liang Jingjing
 * Copyright 2014 Xiaocong Zhou
 * 
 * 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 ca.ualberta.app.activity;

import ca.ualberta.app.activity.R;
import ca.ualberta.app.models.User;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;

/**
 * This is the mean activity that contains 5 mean functionalities by inflating 5
 * fragments: (1) view all questions authors have posted; (2) view users'
 * favorite questions; (3) login as an author, and create a new question; (4)
 * search questions which contain a given keyword; (5) view and modify user
 * profiles.
 * 
 * The fragment part is from this web site:
 * http://www.programering.com/a/MjNzIDMwATI.html
 * 
 * @author Anni
 * @author Bicheng
 * @author Xiaocong
 */
public class MainActivity extends FragmentActivity {
    private Fragment[] fragments;
    private FragmentManager fragmentManager;
    private FragmentTransaction fragmentTransaction;
    private RadioGroup bottom_Rg;
    private RadioButton main_Rb, add_Rb;
    private String loginCause = "Question";

    /**
     * onCreate method. Once the activity is created, first set the content
     * view, and initialize ActionBar for fragments, and a Spinner for sort
     * options.
     * 
     * @param savedInstanceState
     *            the saved instance state bundle
     */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        bottom_Rg = (RadioGroup) findViewById(R.id.main_menu);
        main_Rb = (RadioButton) findViewById(R.id.main_menu_button);
        add_Rb = (RadioButton) findViewById(R.id.add_menu_button);
        fragments = new Fragment[2];
        fragmentManager = getSupportFragmentManager();
        fragments[0] = fragmentManager.findFragmentById(R.id.fragement_main);
        fragments[1] = fragmentManager.findFragmentById(R.id.fragement_profile);
        fragmentTransaction = fragmentManager.beginTransaction().hide(fragments[0]).hide(fragments[1]);
        fragmentTransaction.show(fragments[0]).commit();
        setFragmentIndicator();
    }

    /**
     * Connecting all fragment activities to the corresponding buttons in the
     * action bar at the bottom of the screen. Hiding the "ask a question"
     * fragment, until the user login as an author
     */
    private void setFragmentIndicator() {

        bottom_Rg = (RadioGroup) findViewById(R.id.main_menu);
        bottom_Rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                fragmentTransaction = fragmentManager.beginTransaction().hide(fragments[0]).hide(fragments[1]);

                switch (checkedId) {
                case R.id.main_menu_button:
                    fragmentTransaction.show(fragments[0]).commit();
                    break;

                case R.id.add_menu_button:
                    main_Rb.performClick();
                    add_Rb.setOnClickListener(new OnClickListener() {
                        public void onClick(View v) {
                            if (!User.loginStatus) {
                                Intent intent = new Intent(MainActivity.this, LoginActivity.class);
                                intent.putExtra(LoginActivity.LOGINCAUSE, loginCause);
                                startActivity(intent);
                            } else {
                                Intent intent = new Intent(MainActivity.this, CreateQuestionActivity.class);
                                startActivity(intent);
                            }
                        }
                    });
                    break;

                case R.id.profile_menu_button:
                    fragmentTransaction.show(fragments[1]).commit();
                    break;

                default:
                    break;
                }

            }
        });
    }
}