Android Open Source - android-flash-cards Add Card Fragment

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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/*w  w w .  j  a  v a 2  s.c  o m*/
 *
 * 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.fragment;

import org.thomasamsler.android.flashcards.AppConstants;
import org.thomasamsler.android.flashcards.MainApplication;
import org.thomasamsler.android.flashcards.R;
import org.thomasamsler.android.flashcards.activity.MainActivity;
import org.thomasamsler.android.flashcards.db.DataSource;
import org.thomasamsler.android.flashcards.model.Card;
import org.thomasamsler.android.flashcards.model.CardSet;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.TextView;
import android.widget.Toast;

public class AddCardFragment extends Fragment implements AppConstants {

  private CardSet mCardSet;
  private String mFrontPageWord;
  private String mBackPageWord;
  
  private View mView;
  private EditText mEditText;
  private TextView mTextViewTitle;
  
  private boolean mWordToggle;
  private boolean mIsSaved;
  
  private DataSource mDataSource;
  
  
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    
    return inflater.inflate(R.layout.add_card_fragment, container, false);
  }
  
  
  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    mDataSource = ((MainActivity)getActivity()).getDataSource();
    
    mFrontPageWord = "";
    mBackPageWord = "";
    mWordToggle = false;
    mIsSaved = false;
    
    mEditText = (EditText)getActivity().findViewById(R.id.editTextAdd);
    
    mTextViewTitle = (TextView)getActivity().findViewById(R.id.textViewAddTitle);
    
    ImageButton imageButtonAddCancel = (ImageButton)getActivity().findViewById(R.id.imageButtonAddCancel);
    imageButtonAddCancel.setOnClickListener(new OnClickListener() {
      
      public void onClick(View v) {
        
        ((MainApplication)getActivity().getApplication()).doAction(ACTION_SHOW_CARD_SETS, Boolean.TRUE);
      }
    });
    
    ImageButton imageButtonAddSave = (ImageButton)getActivity().findViewById(R.id.imageButtonAddSave);
    imageButtonAddSave.setOnClickListener(new OnClickListener() {
      
      public void onClick(View v) {

        if(!isValid(mEditText.getText().toString().trim())) {
          
          return;
        }
        
        if(mWordToggle) { // Back side
        
          mBackPageWord = mEditText.getText().toString().trim();
          
          if(null == mFrontPageWord || "".equals(mFrontPageWord)) {
            
            Toast.makeText(getActivity().getApplicationContext(), R.string.add_card_save_message_warning1, Toast.LENGTH_LONG).show();
            return;
          }
        }
        else { // Front side
          
          mFrontPageWord = mEditText.getText().toString().trim();
          
          if(null == mFrontPageWord || "".equals(mFrontPageWord)) {

            Toast.makeText(getActivity().getApplicationContext(), R.string.add_card_save_message_warning2, Toast.LENGTH_LONG).show();
            return;
          }
          else if(null == mBackPageWord || "".equals(mBackPageWord)) {
            
            Toast.makeText(getActivity().getApplicationContext(), R.string.add_card_save_message_back_page, Toast.LENGTH_SHORT).show();
            
            flipCard(mView);
            return;
          }
        }

        mIsSaved = addCard(mCardSet, mFrontPageWord, mBackPageWord);

        if(mIsSaved) {

          Toast.makeText(getActivity().getApplicationContext(), R.string.add_card_save_message_success, Toast.LENGTH_SHORT).show();
          ((MainApplication)getActivity().getApplication()).doAction(ACTION_SHOW_ADD_CARD, mCardSet);
        }
        else {

          Toast.makeText(getActivity().getApplicationContext(), R.string.add_card_save_message_error, Toast.LENGTH_LONG).show();
        }
        
        mEditText.setText("");
      }
    });

    mView = getActivity().findViewById(R.id.relativeLayoutAdd);
    mView.setOnLongClickListener(new OnLongClickListener() {
      
      public boolean onLongClick(View v) {
        
        flipCard(v);

        return false;
      }
    });
  }
  
  @Override
  public void onResume() {
    super.onResume();
    ((MainApplication)getActivity().getApplication()).doAction(ACTION_SET_HELP_CONTEXT, Integer.valueOf(HELP_CONTEXT_ADD_CARD));
  }
  
  public void setCardSet(CardSet cardSet) {
    
    this.mCardSet = cardSet;
  }
  
  private void flipCard(final View v) {
    
    final Animation flip1 = AnimationUtils.loadAnimation(v.getContext(), R.anim.flip1);
    final Animation flip2 = AnimationUtils.loadAnimation(v.getContext(), R.anim.flip2);
    flip1.setAnimationListener(new AnimationListener() {
      
      public void onAnimationStart(Animation animation) { /* Nothing to do here */ }
      
      public void onAnimationRepeat(Animation animation) { /* Nothing to do here */ }
      
      public void onAnimationEnd(Animation animation) {
        
        mWordToggle ^= true;

        if(mWordToggle) { // Back side
          
          // Save front side word
          mFrontPageWord = mEditText.getText().toString().trim();
          
          // Restore back side word
          if(null == mBackPageWord || "".equals(mBackPageWord)) {
            
            mEditText.setText("");
          }
          else {
            
            mEditText.setText(mBackPageWord);
          }
          
          mTextViewTitle.setText(R.string.add_card_back_title);
        }
        else { // Front side
          
          // Save back side word
          mBackPageWord = mEditText.getText().toString().trim();
          
          // Restore front side word
          if(null == mFrontPageWord || "".equals(mFrontPageWord)) {
            
            mEditText.setText("");
          }
          else {
            
            mEditText.setText(mFrontPageWord);
          }
          
          mTextViewTitle.setText(R.string.add_card_front_title);
        }
        
        v.startAnimation(flip2);
      }
    });
    
    v.startAnimation(flip1);
  }
  
  private boolean addCard(CardSet cardSet, String cardQuestion, String cardAnswer) {
    
    
    cardSet.setCardCount(cardSet.getCardCount() + 1);
    
    Card card = new Card();
    card.setQuestion(cardQuestion);
    card.setAnswer(cardAnswer);
    card.setCardSetId(cardSet.getId());
    card.setDisplayOrder(cardSet.getCardCount());
    
    try {
      
      mDataSource.createCard(card);
    }
    catch(Exception e) {
    
      cardSet.setCardCount(cardSet.getCardCount() - 1);
      return false;
    }
    
    mDataSource.updateCardSet(cardSet);
    
    return true;
  }
  
  private boolean isValid(String input) {
    
    if(null == input) {
      
      Toast.makeText(getActivity().getApplicationContext(), R.string.input_validation_warning, Toast.LENGTH_SHORT).show();
      return false;
    }
    
    return true;
  }
}
Java Source Code List
