Android Open Source - android-todo To Do Activity

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License

The source code is released under:

Eclipse Public License - v 1.0 THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES RECI...

Java Source Code

package com.gemmakbarlow.todo;
/*from   w w w. j  av a 2s  . c om*/
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

import org.apache.commons.io.FileUtils;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

public class ToDoActivity extends Activity {
  private ArrayList<String> todoItems;

  /*
   *  Adapter allows for the population of items in any kind of list view in Android
   *  Translator between a piece of data & it's view representation.
   */  
  private ArrayAdapter<String> aTodoItems; // aTodoItems follows a naming convention for adapters 

  private ListView lvItems;
  private EditText etNewItem;
  protected static final String persistentFilename = "todo.txt";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_to_do);

    readItems();
    
    lvItems = (ListView)findViewById(R.id.lvItems);
    todoItems = new ArrayList<String>();
    aTodoItems = new ArrayAdapter<String>(getBaseContext(), android.R.layout.simple_list_item_1, todoItems);
    lvItems.setAdapter(aTodoItems);
    etNewItem = (EditText)findViewById(R.id.etNewItem);
        
    //populateArrayItems();
    setupViewListener();
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.to_do, menu);
    return true;
  }

  public void addToDoItem(View v) {
    String newItemText = etNewItem.getText().toString();
    if(newItemText.trim().length() > 0) {
      aTodoItems.add(newItemText);
      etNewItem.setText("");
      writeItems();
    }
  }


//  private void populateArrayItems() {
//    todoItems.add("Gemma's Awesome First Item");
//    todoItems.add("Gemma's Awesome Second Item");
//  }
  
  private void setupViewListener() {
    lvItems.setOnItemLongClickListener(new OnItemLongClickListener() {
      @Override
      public boolean onItemLongClick(AdapterView<?> aView, View item,
          int index, long id) {
        todoItems.remove(index);
        aTodoItems.notifyDataSetInvalidated();
        writeItems();
        return true;
      }
      
    });
  }
  
  private void readItems() {
    File filesBaseDirectory = getFilesDir();
    File persistentToDoFile = new File(filesBaseDirectory, ToDoActivity.persistentFilename);
    
    try {
      todoItems = new ArrayList<String>(FileUtils.readLines(persistentToDoFile));
    } catch (IOException e) {
      todoItems = new ArrayList<String>();
    }
  }
  
  private void writeItems() {
    File fileBaseDirectory = getFilesDir();
    File persistentToDoFile = new File (fileBaseDirectory, ToDoActivity.persistentFilename);
    
    try {
      FileUtils.writeLines(persistentToDoFile, todoItems);
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
}

Java Source Code List

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