Android Open Source - AndroidSimpleTodoApp Todo Activity

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Back to project page AndroidSimpleTodoApp.

License

The source code is released under:

MIT License

Java Source Code

package codepath.apps.androidsimpletodoapp;
//from  w w w. jav  a  2s. co m
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

import org.apache.commons.io.FileUtils;

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

public class TodoActivity extends Activity {

  protected ArrayList<String> items;
  protected ArrayAdapter<String> itemsAdapter;
  protected ListView lvItems;
  protected EditText etNewItem;

  protected final int EDIT_ITEM_REQUEST_CODE = 10;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_todo);
    lvItems = (ListView)findViewById(R.id.lvItems);
    etNewItem = (EditText)findViewById(R.id.etNewItem);
    deserializeItems();
    itemsAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items);
    lvItems.setAdapter(itemsAdapter);
    setupListViewListeners();
  }

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

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  public void onItemAdded(View v) {
    String itemText = etNewItem.getText().toString();
    if (itemText.trim().length() > 0) {
      itemsAdapter.add(itemText);
      etNewItem.setText("");
      serializeItems();
    }
  }

  protected void setupListViewListeners() {
    lvItems.setOnItemLongClickListener(new OnItemLongClickListener() {
      @Override
      public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long rowId) {
        System.out.print("Foo");
        items.remove(position);
        itemsAdapter.notifyDataSetChanged();
        serializeItems();
        return true;
      }
    });

    lvItems.setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        editItem(position);
      }
    });
  }

  protected void deserializeItems() {
    File filesDir = getFilesDir();
    File todoFile = new File(filesDir, "todo.txt");
    try {
      items = new ArrayList<String>(FileUtils.readLines(todoFile));
    } catch (IOException ioe) {
      items = new ArrayList<String>();
      ioe.printStackTrace();
    }
  }

  protected void serializeItems() {
    File filesDir = getFilesDir();
    File todoFile = new File(filesDir, "todo.txt");
    try {
      FileUtils.writeLines(todoFile, items);
    }  catch (IOException ioe) {
      ioe.printStackTrace();
    }
  }

  protected void editItem(int pos) {
    Intent i = new Intent(TodoActivity.this, EditItemActivity.class);
    i.putExtra("text", items.get(pos));
    i.putExtra("pos", pos);
    startActivityForResult(i, EDIT_ITEM_REQUEST_CODE);
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK && requestCode == EDIT_ITEM_REQUEST_CODE) {
      String text = data.getExtras().getString("text");
      int position = data.getExtras().getInt("pos");
      items.set(position, text);
      itemsAdapter.notifyDataSetChanged();
      serializeItems();
    }
  }
}

Java Source Code List

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