Android Open Source - timeflash Flash Card Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.derlethtully.timeflash;
//from w w  w  .j a v  a 2  s. c o m
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.util.TypedValue;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class FlashCardActivity extends Activity {
  private List<FlashCardEntry> currentVocab = new ArrayList<FlashCardEntry>();
  private List<FlashCardEntry> oldVocab = new ArrayList<FlashCardEntry>();
  private String vocabList = null;
  private String answerText = null;
  private Button nextEntryB;
  private Button prevEntryB;
  private Button revealAnswerB;
  private TextView clueView;
  private TextView answerView;
  private TextView indexView;
  private int flashCardIndex = 0;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_flash_card);
    View view = this.getWindow().getDecorView();
    view.setBackgroundColor(0xFFCCCCCC);
    //Setup textviews and buttons
    clueView = (TextView) findViewById(R.id.clue);
    clueView.setOnClickListener(new OnClickListener(){
      @Override
      public void onClick(View arg0) {
        float fontSize = clueView.getTextSize() + 10;
        Log.d("Font Size",Float.toString(clueView.getTextSize()));
        if(fontSize>=150)fontSize=32;
        clueView.setTextSize(TypedValue.COMPLEX_UNIT_DIP,fontSize);
      }      
    });
    answerView = (TextView) findViewById(R.id.answer);
    indexView = (TextView) findViewById(R.id.index);    
    //Button to go backwards in vocab list
    prevEntryB = (Button) findViewById(R.id.prev_entry_b);
    prevEntryB.setOnClickListener(new OnClickListener(){
      @Override
      public void onClick(View arg0) {
        //Decrement the index, ensure index is within bounds, and then update flashcard 
        flashCardIndex--;
        if(flashCardIndex == -1) flashCardIndex = currentVocab.size()-1;
        updateFlashCardEntry(flashCardIndex);
      }      
    });
    //Button to go forwards in vocab list
    nextEntryB = (Button) findViewById(R.id.next_entry_b);
    nextEntryB.setOnClickListener(new OnClickListener(){
      @Override
      public void onClick(View arg0) {
        //Increment index, ensure index is within bounds, and then update flashcard
        flashCardIndex++;
        if(flashCardIndex==currentVocab.size()) flashCardIndex = 0;
        updateFlashCardEntry(flashCardIndex);
      }      
    });
    //Button to show the current flashcard's answer
    revealAnswerB = (Button) findViewById(R.id.reveal_answer_b);
    revealAnswerB.setOnClickListener(new OnClickListener(){
      @Override
      public void onClick(View arg0) {
        answerView.setText(answerText);
      }
    });
    //Get location of vocabulary file
    vocabList = getFilesDir().toString() + "/vocabList.txt";
    //Open the file if possible and generate the current flashcard list
    try {
      InputStream inputStream = new FileInputStream(vocabList);
      BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
      String clue=br.readLine();
      String answer=br.readLine();
      String time = br.readLine();
      while((clue!=null)&&(answer!=null)&&(time!=null)){
        FlashCardEntry flashCard = new FlashCardEntry(clue,answer,time);
        currentVocab.add(flashCard);
        clue = br.readLine();
        answer = br.readLine();
        time = br.readLine();
      }
      updateFlashCardEntry(flashCardIndex);
      br.close();
      inputStream.close();
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }

  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.flash_card, menu);
    return true;
  }

  //Takes the current index and updates the flashcard information accordingly
  public void updateFlashCardEntry(int index){
    try{
      FlashCardEntry flashCard = currentVocab.get(index);
      clueView.setText(flashCard.getClue());
      answerText = flashCard.getAnswer();
      answerView.setText("");
      indexView.setText(Integer.toString(index+1)+" of "
          +Integer.toString(currentVocab.size()));      
    }catch(IndexOutOfBoundsException e){
      Toast.makeText(this, "No Words in List", Toast.LENGTH_SHORT).show();
      finish();
    }
  }
}

Java Source Code List

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