Android Open Source - android-flash-cards Main Activity

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright 2011, 2012 Thomas Amsler/*  www . ja va  2 s.  com*/
 *
 * 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 org.thomasamsler.android.flashcards.activity;

import org.thomasamsler.android.flashcards.ActionBusListener;
import org.thomasamsler.android.flashcards.AppConstants;
import org.thomasamsler.android.flashcards.MainApplication;
import org.thomasamsler.android.flashcards.R;
import org.thomasamsler.android.flashcards.conversion.FileToDbConversion;
import org.thomasamsler.android.flashcards.db.DataSource;
import org.thomasamsler.android.flashcards.dialog.HelpDialog;
import org.thomasamsler.android.flashcards.fragment.AboutFragment;
import org.thomasamsler.android.flashcards.fragment.ActionbarFragment;
import org.thomasamsler.android.flashcards.fragment.AddCardFragment;
import org.thomasamsler.android.flashcards.fragment.CardSetsFragment;
import org.thomasamsler.android.flashcards.fragment.SetupFragment;
import org.thomasamsler.android.flashcards.model.CardSet;
import org.thomasamsler.android.flashcards.pager.CardsPager;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MainActivity extends FragmentActivity implements ActionBusListener, AppConstants {

  private static final String FEEDBACK_EMAIL_ADDRESS = "tamsler@gmail.com";

  private ActionbarFragment mActionbarFragment;
  private CardSetsFragment mCardSetsFragment;
  private AddCardFragment mAddCardFragment;
  private SetupFragment mSetupFragment;
  private AboutFragment mAboutFragment;
  private CardSet mCurrentCardSet;
  private int mHelpContext;
  private DataSource mDataSource;
  private int mActiveFragmentReference;

  private LinearLayout mFragmentContainer;
  private ViewPager mViewPager;

  private MainApplication mMainApplication;

  private boolean mExitOnBackPressed;

  private int mFontSize;

  private CardsPager mCurrentCardsPager;

  @Override
  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    mDataSource = new DataSource(this);

    mMainApplication = (MainApplication) getApplication();

    mMainApplication.initActionBusListener();

    mMainApplication.registerAction(this, ACTION_SHOW_CARD_SETS, ACTION_SHOW_CARDS, ACTION_SHOW_HELP, ACTION_SHOW_SETUP, ACTION_SHOW_ABOUT, ACTION_GET_EXTERNAL_CARD_SETS, ACTION_SET_HELP_CONTEXT, ACTION_SHOW_ADD_CARD, ACTION_ADD_CARD_SET, ACTION_FONT_SIZE_CHANGE, ACTION_SEND_FEEDBACK, ACTION_RESHUFFLE_CARDS);

    /*
     * Determine if we need to run the File to DB conversion
     */
    SharedPreferences sharedPreferences = getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
    boolean runConversion = sharedPreferences.getBoolean(PREFERENCE_RUN_CONVERSION, PREFERENCE_RUN_CONVERSION_DEFAULT);

    if (runConversion) {

      FileToDbConversion conversion = new FileToDbConversion();
      conversion.convert(this, mDataSource);

      SharedPreferences.Editor editor = sharedPreferences.edit();
      editor.putBoolean(PREFERENCE_RUN_CONVERSION, false);
      editor.commit();
    }

    /*
     * Getting the preferred font size
     */
    int fontSizePreference = sharedPreferences.getInt(PREFERENCE_FONT_SIZE, PREFERENCE_NORMAL_FONT_SIZE);
    mFontSize = getFontSizePreference(fontSizePreference);

    mFragmentContainer = (LinearLayout) findViewById(R.id.fragmentContainer);
    mViewPager = (ViewPager) findViewById(R.id.viewpager);

    showCardSetsFragment(false);
  }

  @Override
  public void onPause() {
    
    mMainApplication.doAction(ACTION_SHOW_CARD_SETS, Boolean.TRUE);
    super.onPause();
  }
  
  @Override
  public void onDestroy() {
    
    mDataSource.close();
    super.onDestroy();
  }
  

  @Override
  public void onBackPressed() {

    /*
     * Intercepting the back button press since we need to handle the Cards
     * view
     */
    if (mExitOnBackPressed) {

      finish();
    }
    else {

      showCardSetsFragment(true);
    }
  }

  @Override
  public boolean onKeyUp(int keyCode, KeyEvent event) {

    super.onKeyUp(keyCode, event);

    if (keyCode == KeyEvent.KEYCODE_MENU) {

      mMainApplication.doAction(ACTION_SHOW_OVERFLOW_ACTIONS);
    }

    return true;
  }

  private void setHelpContext(Integer context) {

    if (null != context) {

      this.mHelpContext = context.intValue();
    }
  }

  private void showCardSetsFragment(boolean addToBackStack) {

    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

    if (null == mActionbarFragment) {

      mActionbarFragment = ActionbarFragment.newInstance(LIST_FRAGMENT);
      fragmentTransaction.replace(R.id.actionbarContainer, mActionbarFragment);
    }
    else {

      mActionbarFragment.configureFor(LIST_FRAGMENT);
    }

    if (null == mCardSetsFragment) {

      mCardSetsFragment = new CardSetsFragment();
    }

    fragmentTransaction.replace(R.id.fragmentContainer, mCardSetsFragment);

    if (addToBackStack) {

      fragmentTransaction.addToBackStack(null);
    }

    fragmentTransaction.commit();

    mFragmentContainer.setVisibility(View.VISIBLE);
    mViewPager.setVisibility(View.GONE);
    mHelpContext = HELP_CONTEXT_CARD_SET_LIST;
    mActiveFragmentReference = LIST_FRAGMENT;
    mExitOnBackPressed = true;
  }

  private void showAddCardFragment(CardSet cardSet) {

    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

    if (null == mActionbarFragment) {

      mActionbarFragment = ActionbarFragment.newInstance(ADD_FRAGMENT);
      fragmentTransaction.replace(R.id.actionbarContainer, mActionbarFragment);
    }
    else {

      mActionbarFragment.configureFor(ADD_FRAGMENT);
    }

    if (null == mAddCardFragment) {

      mAddCardFragment = new AddCardFragment();
    }

    mAddCardFragment.setCardSet(cardSet);

    fragmentTransaction.replace(R.id.fragmentContainer, mAddCardFragment);
    fragmentTransaction.addToBackStack(null);
    fragmentTransaction.commit();

    mHelpContext = HELP_CONTEXT_ADD_CARD;
    mActiveFragmentReference = ADD_FRAGMENT;
    mExitOnBackPressed = false;
  }

  private void showSetupFragment() {

    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

    if (null == mActionbarFragment) {

      mActionbarFragment = ActionbarFragment.newInstance(SETUP_FRAGMENT);
      fragmentTransaction.replace(R.id.actionbarContainer, mActionbarFragment);
    }
    else {

      mActionbarFragment.configureFor(SETUP_FRAGMENT);
    }

    if (null == mSetupFragment) {

      mSetupFragment = new SetupFragment();
    }

    fragmentTransaction.replace(R.id.fragmentContainer, mSetupFragment);
    fragmentTransaction.addToBackStack(null);
    fragmentTransaction.commit();

    mHelpContext = HELP_CONTEXT_SETUP;
    mActiveFragmentReference = SETUP_FRAGMENT;
    mExitOnBackPressed = false;
  }

  private void showAboutFragment() {

    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

    if (null == mActionbarFragment) {

      mActionbarFragment = ActionbarFragment.newInstance(ABOUT_FRAGMENT);
      fragmentTransaction.replace(R.id.actionbarContainer, mActionbarFragment);
    }
    else {

      mActionbarFragment.configureFor(ABOUT_FRAGMENT);
    }

    if (null == mAboutFragment) {

      mAboutFragment = new AboutFragment();
    }

    fragmentTransaction.replace(R.id.fragmentContainer, mAboutFragment);
    fragmentTransaction.addToBackStack(null);
    fragmentTransaction.commit();

    mHelpContext = HELP_CONTEXT_DEFAULT;
    mActiveFragmentReference = ABOUT_FRAGMENT;
    mExitOnBackPressed = false;
  }

  private void showCardsFragment(CardSet cardSet) {

    mCurrentCardSet = cardSet;

    /*
     * Clear "old" CardsPager so that we see the old cards when the new
     * pager gets launched.
     */
    if (null != mCurrentCardsPager) {

      mCurrentCardsPager.clear();
    }

    FragmentManager fragmentManager = getSupportFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

    if (null == mActionbarFragment) {

      mActionbarFragment = ActionbarFragment.newInstance(CARDS_FRAGMENT);
      fragmentTransaction.replace(R.id.actionbarContainer, mActionbarFragment);
    }
    else {

      mActionbarFragment.configureFor(CARDS_FRAGMENT);
    }

    CardsPager cardsPager = CardsPager.newInstance(cardSet, mFontSize);

    try {

      fragmentTransaction.replace(R.id.viewpager, cardsPager);

      fragmentTransaction.addToBackStack(null);
      fragmentTransaction.commit();
    }
    catch (Exception e) {

      Log.e(LOG_TAG, "Exception", e);
    }

    mCurrentCardsPager = cardsPager;

    mFragmentContainer.setVisibility(View.GONE);
    mViewPager.setVisibility(View.VISIBLE);
    mHelpContext = HELP_CONTEXT_VIEW_CARD;
    mActiveFragmentReference = CARDS_FRAGMENT;
    mExitOnBackPressed = false;
  }

  private void showHelp() {

    HelpDialog helpDialog = new HelpDialog(this);

    switch (mHelpContext) {

    case HELP_CONTEXT_DEFAULT:
      helpDialog.setHelp(getResources().getString(R.string.help_content_default));
      break;

    case HELP_CONTEXT_SETUP:
      helpDialog.setHelp(getResources().getString(R.string.help_content_setup));
      break;

    case HELP_CONTEXT_CARD_SET_LIST:
      helpDialog.setHelp(getResources().getString(R.string.help_content_card_set_list));
      break;

    case HELP_CONTEXT_ADD_CARD:
      helpDialog.setHelp(getResources().getString(R.string.help_content_add_card));
      break;

    case HELP_CONTEXT_VIEW_CARD:
      helpDialog.setHelp(getResources().getString(R.string.help_content_view_card));
      break;

    default:
      helpDialog.setHelp(getResources().getString(R.string.help_content_default));
      break;
    }

    helpDialog.show();
  }

  private void getExternal() {

    if (mActiveFragmentReference == SETUP_FRAGMENT) {

      showCardSetsFragment(true);
    }

    if (null == mCardSetsFragment) {

      Toast.makeText(getApplicationContext(), R.string.external_data_message_error, Toast.LENGTH_SHORT).show();
    }
    else {

      mCardSetsFragment.getFlashCardExchangeCardSets();
    }
  }

  private int getFontSizePreference(int fontSizePreference) {

    int fontSize = NORMAL_FONT_SIZE;

    switch (fontSizePreference) {

    case PREFERENCE_SMALL_FONT_SIZE:
      fontSize = SMALL_FONT_SIZE;
      break;
    case PREFERENCE_NORMAL_FONT_SIZE:
      fontSize = NORMAL_FONT_SIZE;
      break;
    case PREFERENCE_LARGE_FONT_SIZE:
      fontSize = LARGE_FONT_SIZE;
      break;
    default:
      fontSize = NORMAL_FONT_SIZE;
      break;
    }

    return fontSize;
  }

  private void sendFeedback() {

    String toList[] = { FEEDBACK_EMAIL_ADDRESS };

    Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);
    emailIntent.setType("plain/text");
    emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, toList);
    emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, getResources().getString(R.string.email_feedback_subject));

    startActivity(Intent.createChooser(emailIntent, getResources().getString(R.string.email_feedback_chooser)));
  }

  public DataSource getDataSource() {

    return mDataSource;
  }

  /*
   * Helper method to check if there is network connectivity
   */
  public boolean hasConnectivity() {

    ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

    if (null == connectivityManager) {

      return false;
    }

    NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();

    if (null != networkInfo && networkInfo.isAvailable() && networkInfo.isConnected()) {

      return true;
    }
    else {

      return false;
    }
  }

  public void doAction(Integer action, Object data) {

    switch (action) {

    case ACTION_SHOW_CARD_SETS:
      boolean addToBackStack = (null != data ? ((Boolean) data).booleanValue() : false);
      showCardSetsFragment(addToBackStack);
      break;
    case ACTION_SHOW_CARDS:
      showCardsFragment((CardSet) data);
      break;
    case ACTION_SHOW_HELP:
      showHelp();
      break;
    case ACTION_SHOW_SETUP:
      showSetupFragment();
      break;
    case ACTION_SHOW_ABOUT:
      showAboutFragment();
      break;
    case ACTION_GET_EXTERNAL_CARD_SETS:
      getExternal();
      break;
    case ACTION_SET_HELP_CONTEXT:
      setHelpContext((Integer) data);
      break;
    case ACTION_SHOW_ADD_CARD:
      showAddCardFragment((CardSet) data);
      break;
    case ACTION_ADD_CARD_SET:
      mCardSetsFragment.addCardSet((CardSet) data);
      break;
    case ACTION_FONT_SIZE_CHANGE:
      int fontSizePreference = (null != data ? ((Integer) data).intValue() : PREFERENCE_NORMAL_FONT_SIZE);
      mFontSize = getFontSizePreference(fontSizePreference);
      break;
    case ACTION_SEND_FEEDBACK:
      sendFeedback();
      break;
    case ACTION_RESHUFFLE_CARDS:
      showCardsFragment(mCurrentCardSet);
      break;
    }
  }
}
Java Source Code List
