Android Open Source - GPA Task Manager Application

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License

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

package com.bishal.android.taskmanager;
/* w  w  w  .  j  a v a 2  s.  c o  m*/
import static com.bishal.android.taskmanager.tasks.TasksSQLiteOpenHelper.*;

import java.util.ArrayList;

import android.app.Application;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.bishal.android.taskmanager.tasks.Task;
import com.bishal.android.taskmanager.tasks.TasksSQLiteOpenHelper;

public class TaskManagerApplication extends Application {

  private SQLiteDatabase database;
  private ArrayList<Task> currentTasks;
  
  @Override
  public void onCreate() {
    super.onCreate();
    TasksSQLiteOpenHelper helper = new TasksSQLiteOpenHelper(this);
    database = helper.getWritableDatabase();
    if (null == currentTasks) {
      loadTasks();
    }
  }

  @Override
  public void onTerminate() {
    database.close();
    super.onTerminate();
  }

  public void setCurrentTasks(ArrayList<Task> currentTasks) {
    this.currentTasks = currentTasks;
  }

  public ArrayList<Task> getCurrentTasks() {
    return currentTasks;
  }
  
  public void addTask(Task t) {
    assert(null != t);
    
    ContentValues values = new ContentValues();
    values.put(TASK_NAME, t.getName());
    values.put(TASK_COMPLETE, Boolean.toString(t.isComplete()));
    values.put(TASK_ADDRESS, t.getAddress());
    values.put(TASK_LATITUDE, t.getLatitude());
    values.put(TASK_LONGITUDE, t.getLongitude());

    t.setId(database.insert(TASKS_TABLE, null, values));

    currentTasks.add(t);
  }
  
  public void saveTask(Task t) {
    assert(null != t);
    ContentValues values = new ContentValues();
    values.put(TASK_NAME, t.getName());
    values.put(TASK_COMPLETE, Boolean.toString(t.isComplete()));
    values.put(TASK_ADDRESS, t.getAddress());
    values.put(TASK_LATITUDE, t.getLatitude());
    values.put(TASK_LONGITUDE, t.getLongitude());
    
    long id = t.getId();
    String where = String.format("%s = %d", TASK_ID, id);

    database.update(TASKS_TABLE, values, where, null);
  }
  
  public void deleteTasks(Long[] ids) {
    StringBuffer idList = new StringBuffer();
    for (int i=0; i<ids.length; i++) {
      idList.append(ids[i]);
      if (i < ids.length - 1) {
        idList.append(",");
      }
    }
    String where = String.format("%s in (%s)", TASK_ID, idList);
    database.delete(TASKS_TABLE, where, null);
  }

  private void loadTasks() {
    currentTasks = new ArrayList<Task>();
    Cursor tasksCursor = database.query(TASKS_TABLE, new String[] {TASK_ID, TASK_NAME, TASK_COMPLETE, TASK_ADDRESS, TASK_LATITUDE, TASK_LONGITUDE}, null, null, null, null, String.format("%s,%s", TASK_COMPLETE, TASK_NAME));
    tasksCursor.moveToFirst();
    Task t;
    if (! tasksCursor.isAfterLast()) {
      do {
        int id = tasksCursor.getInt(0);
        String name  = tasksCursor.getString(1);
        String boolValue = tasksCursor.getString(2);
        boolean complete = Boolean.parseBoolean(boolValue);
        String address = tasksCursor.getString(3);
        float latitude = tasksCursor.getFloat(4);
        float longitude = tasksCursor.getFloat(5);
        t = new Task(name);
        t.setId(id);
        t.setComplete(complete);
        t.setAddress(address);
        t.setLatitude(latitude);
        t.setLongitude(longitude);
        currentTasks.add(t);
      } while (tasksCursor.moveToNext());
    }
    
    tasksCursor.close();
  }

}
Java Source Code List
