Android Open Source - sigimera-android-app Main Activity

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The source code is released under:
GNU General Public License
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Java Source Code

/**
 * Sigimera Crises Information Platform Android Client
 * Copyright (C) 2013 by Sigimera//from   ww  w  . ja  v a  2 s.com
 * All Rights Reserved
 *
 * 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 2 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, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.sigimera.app.android;

import org.sigimera.app.android.backend.network.LocationUpdaterHttpHelper;
import org.sigimera.app.android.controller.ApplicationController;
import org.sigimera.app.android.controller.LocationController;
import org.sigimera.app.android.controller.PersistanceController;
import org.sigimera.app.android.exception.AuthenticationErrorException;
import org.sigimera.app.android.model.Constants;
import org.sigimera.app.android.util.Common;
import org.sigimera.app.android.util.Config;

import com.google.android.gcm.GCMRegistrar;

import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.graphics.Color;
import android.location.Location;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.WindowManager;
import android.webkit.WebView;
import android.widget.EditText;
import android.widget.TabHost;
import android.widget.Toast;

/**
 * Activity which initialise the tabs and starts the application.
 *
 * @author Corneliu-Valentin Stanciu
 * @e-mail corneliu.stanciu@sigimera.org
 */
public class MainActivity extends FragmentActivity {

  /**
   * Authentication token.
   */
  private String authToken;

  /**
   * Hosting the tabs.
   */
  private TabHost mTabHost;

  /**
   * View pager used for scrolling to the left and right.
   */
  private ViewPager mViewPager;

  /**
   * The main container of tabs and view pager.
   */
  private TabsAdapter mTabsAdapter;

  /**
   * Progress dialog for waiting while loading.
   */
  private ProgressDialog progressDialog = null;

  /**
   *
   */
  private final Handler guiHandler = new Handler();

  /**
   * Thread which calls the login error method.
   */
  private final Runnable errorLogin = new Runnable() {
    @Override
    public void run() {
      showLoginErrorToast();
    }
  };

  /**
   * Thread which calls the method for setting the tabs if the login was
   * successfully or there exists an authentication token.
   */
  private final Runnable successfulLogin = new Runnable() {
    @Override
    public void run() {
      setTabsAfterLogin();
    }
  };

  @Override
  protected final void onCreate(final Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    this.setContentView(R.layout.activity_main);
    this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

    getWindow().setSoftInputMode(
        WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
    ApplicationController appController = ApplicationController
        .getInstance();

    int currentapiVersion = Build.VERSION.SDK_INT;
    if (currentapiVersion >= android.os.Build.VERSION_CODES.HONEYCOMB) {
      appController.init(getApplicationContext(),
          getSharedPreferences(Constants.PREFS_NAME, 0),
          getActionBar());
      if (!Common.hasInternet()) {
        getActionBar().setIcon(
            getResources().getDrawable(
                R.drawable.sigimera_logo_offline));
      }
    } else {
      appController.init(getApplicationContext(),
          getSharedPreferences(Constants.PREFS_NAME, 0), null);
    }

    // Initialize the tabs
    initTabs();

    if (savedInstanceState != null) {
      mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab"));
    }
  }

  /**
   * Initialise Google Cloud Messaging.
   */
  private void initGCM() {
    if (Config.getInstance().getGcmProjectId() != null) {
      try {
        GCMRegistrar.checkDevice(this);
        GCMRegistrar.checkManifest(this);
        final String regId = GCMRegistrar.getRegistrationId(this);
        if (regId.equals("")) {
          GCMRegistrar.register(this, Config.getInstance()
              .getGcmProjectId());
        }
      } catch (Exception e) {
        Log.v(Constants.LOG_TAG_SIGIMERA_APP,
            "Device meets not the GCM requirements. Exception: "
                + e);
      }
    }
  }

  /**
   * Initialise of tabs.
   */
  private void initTabs() {
    mTabHost = (TabHost) findViewById(android.R.id.tabhost);
    mViewPager = (ViewPager) findViewById(R.id.pager);
    mTabHost.setup();

    try {
      authToken = ApplicationController.getInstance().getSessionHandler()
          .getAuthenticationToken();

      setTabsAfterLogin();
    } catch (AuthenticationErrorException e) {
      setTabsBeforeLogin();
    }
  }

  @Override
  protected final void onSaveInstanceState(final Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putString("tab", mTabHost.getCurrentTabTag());
  }

  @Override
  public final boolean onCreateOptionsMenu(final Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    MenuItem itemUpdateLocation = menu.findItem(R.id.menu_update_location);
    itemUpdateLocation.setTitle("Update your location");

    MenuItem itemUpdateEverything = menu
        .findItem(R.id.menu_update_everything);
    itemUpdateEverything.setTitle("Update everything");
    return super.onCreateOptionsMenu(menu);
  }

  /**
   * Login Listener defined in login.xml layout.
   *
   * @param view
   *            - Android internal needs.
   * @see http://developer.android.com/reference
   *      /android/view/View.html#attr_android:onClickandroid:onClick
   */
  public final void loginClicked(final View view) {
    progressDialog = ProgressDialog.show(MainActivity.this, null,
        "Authentication in progress...", false);
    Thread worker = new Thread() {
      @Override
      public void run() {
        Looper.prepare();

        EditText emailView = (EditText) findViewById(R.id.email_input_field);
        EditText passwordView = (EditText) findViewById(R.id.password_input_field);

        if (ApplicationController
            .getInstance()
            .getSessionHandler()
            .login(emailView.getText().toString(),
                passwordView.getText().toString())) {

          guiHandler.post(successfulLogin);
        } else {
          guiHandler.post(errorLogin);
        }
      }
    };
    worker.start();
  }

  /**
   * The click listener defined in statistic_fragment.xml.
   *
   * @param view
   *            - Android internal needs.
   * @see http://developer.android.com/reference
   *      /android/view/View.html#attr_android:onClickandroid:onClick
   */
  public final void allCrisesClicked(final View view) {
    if (mViewPager != null) {
      mViewPager.setCurrentItem(1, true);
    }
  }

  /**
   * Create account listener in login.xml layout.
   *
   * @param view
   *            - Android internal needs
   * @see http://developer.android.com/reference
   *      /android/view/View.html#attr_android:onClickandroid:onClick
   */
  public final void accountClicked(final View view) {
    Uri uri = Uri.parse("https://www.sigimera.org/register");
    startActivity(new Intent(Intent.ACTION_VIEW, uri));
  }

  @Override
  public final boolean onOptionsItemSelected(final MenuItem item) {
    switch (item.getItemId()) {
    case R.id.menu_update_location:
      LocationUpdaterHttpHelper locUpdater = new LocationUpdaterHttpHelper();
      Location loc = LocationController.getInstance()
          .getLastKnownLocation();
      if (loc != null) {
        Toast toast = Toast.makeText(getApplicationContext(),
            "Trying to update your current location...",
            Toast.LENGTH_LONG);
        toast.setGravity(Gravity.TOP, 0, 0);
        toast.show();
        String latitude = loc.getLatitude() + "";
        String longitude = loc.getLongitude() + "";
        authToken = ApplicationController.getInstance()
            .getSharedPreferences().getString("auth_token", null);
        if (authToken != null) {
          locUpdater.execute(authToken, latitude, longitude);
        }
      } else {
        Toast toast = Toast.makeText(getApplicationContext(),
            "Not able to update location! "
                + "Please active location access...",
            Toast.LENGTH_LONG);
        toast.setGravity(Gravity.TOP, 0, 0);
        toast.show();
      }
      return true;
    case R.id.menu_update_everything:
      try {
        PersistanceController.getInstance().updateEverything(authToken);
      } catch (InterruptedException e) {
        Log.e("[MAIN ACTIVITY]",
            "The thread coudn't sleep betheen api calls.");
      }
      return true;
    case R.id.menu_logout:
      ApplicationController.getInstance().getSessionHandler().logout();
      setTabsBeforeLogin();
      return true;
    case R.id.menu_unregister:
      GCMRegistrar.unregister(getApplicationContext());
      return true;
    case R.id.about:
      showAboutDialog();
      return true;
    default:
      return super.onOptionsItemSelected(item);
    }
  }

  /**
   * Close the progress dialog.
   */
  public final void closeProgressDialog() {
    if (progressDialog != null) {
      progressDialog.dismiss();
      progressDialog = null;
    }
  }

  /**
   * Shows the about dialog.
   */
  public final void showAboutDialog() {
    AlertDialog dialog = new AlertDialog.Builder(MainActivity.this)
        .create();
    dialog.setTitle("About");
    dialog.setButton(AlertDialog.BUTTON_POSITIVE, "OK",
        new DialogInterface.OnClickListener() {
          @Override
          public void onClick(final DialogInterface dialog,
              final int which) {
            dialog.cancel();
          }
        });

    WebView wv = new WebView(this);
    wv.setBackgroundColor(Color.BLACK);

    StringBuffer strbuffer = new StringBuffer();
    strbuffer.append("<small><font color='white'>");
    strbuffer.append("<h3 style='text-align: center'>"
        + this.getString(R.string.app_name) + "</h3>");

    strbuffer.append("<p>This is the official App of the Crises "
        + "Information Platform Sigimera. It provides "
        + "the following functionality:</p>");
    strbuffer.append("<ul>");
    strbuffer.append("<li>Get crises (natural disaster) information."
        + "Currently floods, earthquakes, cyclones "
        + "and volcanic erruptions.</li>");
    strbuffer.append("<li>Get crises alerts via push notifications.</li>");
    strbuffer.append("<li>Get new crises via push notifications.</li>");
    strbuffer.append("<li>Manage your App via "
        + "<a href='http://www.sigimera.org/mobile_devices'>"
        + "<span style='color: #00FFFF'>mobile device management"
        + "website </span></a>.");
    strbuffer.append("</ul>");
    strbuffer.append("<p>&copy; 2013 <a href='http://www.sigimera.com'>"
        + "<span style='color: #00FFFF'>Sigimera Ltd.</span></a>. "
        + "All rights reserved.</p>");

    wv.loadData(strbuffer.toString(), "text/html", "utf-8");

    dialog.setView(wv);
    dialog.show();
  }

  /**
   * Shows the error toast message if the login failed.
   */
  public final void showLoginErrorToast() {
    new ToastNotification(getApplicationContext(),
        "Email or password are incorrect!", Toast.LENGTH_SHORT);
    closeProgressDialog();
  }

  /**
   * Set the order of tabs if the login was successfully or there exists a
   * authentication token.
   */
  private void setTabsAfterLogin() {
    this.mTabHost.clearAllTabs();
    this.mTabsAdapter = new TabsAdapter(this, this.mTabHost,
        this.mViewPager);

    this.mTabsAdapter.addTab(
        this.mTabHost.newTabSpec("Home").setIndicator("Home"),
        StatisticFragment.class, null);
    this.mTabsAdapter.addTab(this.mTabHost.newTabSpec("Crises")
        .setIndicator("Crises"), CrisesListFragment.class, null);
    this.mTabsAdapter.addTab(
        mTabHost.newTabSpec("Profile").setIndicator("Profile"),
        ProfileFragment.class, null);
    initGCM();
    closeProgressDialog();
  }

  /**
   * Set the order of tabs if there is no authentication token.
   */
  private void setTabsBeforeLogin() {
    this.mTabHost.clearAllTabs();
    this.mTabsAdapter = new TabsAdapter(this, this.mTabHost,
        this.mViewPager);
    mTabsAdapter.addTab(mTabHost.newTabSpec("login").setIndicator("Login"),
        LoginFragment.class, null);
    mTabsAdapter.addTab(mTabHost.newTabSpec("Crises")
        .setIndicator("Crises"), CrisesListFragment.class, null);
    closeProgressDialog();
  }
}
Java Source Code List
