SQLite functionality for the task list (using CursorAdapter)

TodoListManager/AndroidManifest.xml

@@ -23,7 +23,7 @@
             </intent-filter>
         </activity>
         <activity
-            android:name="il.ac.huji.todolist.AddNewTodoItemActivity"
+            android:name="il.ac.huji.todolist.AddNewTodoTaskActivity"
             android:label="@string/title_activity_add_new_todo_item"
             android:theme="@android:style/Theme.Holo.Light.Dialog" >
         </activity>

TodoListManager/bin/AndroidManifest.xml

@@ -23,7 +23,7 @@
             </intent-filter>
         </activity>
         <activity
-            android:name="il.ac.huji.todolist.AddNewTodoItemActivity"
+            android:name="il.ac.huji.todolist.AddNewTodoTaskActivity"
             android:label="@string/title_activity_add_new_todo_item"
             android:theme="@android:style/Theme.Holo.Light.Dialog" >
         </activity>

TodoListManager/res/layout/activity_add_new_todo_item.xml

@@ -2,7 +2,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".AddNewTodoItemActivity" >
+    tools:context=".AddNewTodoTaskActivity" >
 
     <EditText
         android:id="@+id/edtNewItem"

TodoListManager/src/il/ac/huji/todolist/AddNewTodoItemActivity.java → TodoListManager/src/il/ac/huji/todolist/AddNewTodoTaskActivity.java

@@ -15,7 +15,7 @@
  * 
  * @author mickey
  */
-public class AddNewTodoItemActivity extends Activity {
+public class AddNewTodoTaskActivity extends Activity {
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {

TodoListManager/src/il/ac/huji/todolist/TodoListManagerActivity.java

@@ -2,23 +2,21 @@
 
 import il.ac.huji.todolist.ActionTaskDialog.DeleteTaskDialogListener;
 
-import java.util.ArrayList;
 import java.util.Date;
 
 import android.os.Build;
 import android.os.Bundle;
+import android.os.Handler;
 import android.annotation.SuppressLint;
 import android.annotation.TargetApi;
 import android.app.Activity;
-import android.app.FragmentManager;
 import android.content.Intent;
-import android.util.Pair;
+import android.database.Cursor;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemLongClickListener;
-import android.widget.ArrayAdapter;
 import android.widget.ListView;
 
 /**
@@ -30,44 +28,38 @@
  */
 public class TodoListManagerActivity extends Activity implements DeleteTaskDialogListener {
 
-	private RetainedFragment<ArrayList<Pair<String, Long>>> _dataFragment;
-	private ArrayAdapter<Pair<String, Long>> _adapter;
-	private ArrayList<Pair<String, Long>> _listItems;
-
+	private TodoTaskCursorAdapter _adapter;
+	private TodoTaskSQLiteHelper _helper;
 	private ActionTaskDialog _actionTaskDialog;
+	private ListView _listToDoTask;
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);
 		setContentView(R.layout.activity_to_do_list);
 
-		// find the retained fragment on activity restarts
-		FragmentManager fm = getFragmentManager();
-		@SuppressWarnings("unchecked")
-		RetainedFragment<ArrayList<Pair<String, Long>>> findFragmentByTag = 
-				(RetainedFragment<ArrayList<Pair<String, Long>>>) fm.findFragmentByTag("dataMain");
-		_dataFragment = findFragmentByTag;
-
-		// create the fragment and data the first time
-		if (_dataFragment == null) {
-			// add the fragment
-			_dataFragment = new RetainedFragment<ArrayList<Pair<String, Long>>>();
-			fm.beginTransaction().add(_dataFragment, "dataMain").commit();
-			// create new list
-			_dataFragment.setData(new ArrayList<Pair<String, Long>>());
-		}
+		_helper = new TodoTaskSQLiteHelper(this);
+
+		_listToDoTask = (ListView) findViewById(R.id.list_todo_tasks);
+
+		new Handler().post(new Runnable() {
+
+			@Override
+			public void run() {	
+				_adapter = new TodoTaskCursorAdapter(TodoListManagerActivity.this, 
+						_helper.getAllTasks());
+				_listToDoTask.setAdapter(_adapter);
+			}
 
-		_listItems = _dataFragment.getData();
-		_adapter = new RowWithDateArrayAdapter(this, _listItems);
+		});
 
-		ListView listToDoTask = (ListView) findViewById(R.id.list_todo_tasks);
-		listToDoTask.setAdapter(_adapter);
-		listToDoTask.setOnItemLongClickListener(new OnItemLongClickListener() {
+		_listToDoTask.setOnItemLongClickListener(new OnItemLongClickListener() {
 
 			@TargetApi(Build.VERSION_CODES.HONEYCOMB)
 			@SuppressLint("NewApi")
 			public boolean onItemLongClick(AdapterView<?> parent, View child, int pos, long id) {
-				_actionTaskDialog = new ActionTaskDialog(pos, _listItems.get(pos).first);
+				Cursor current = (Cursor)_adapter.getItem(pos);
+				_actionTaskDialog = new ActionTaskDialog(current.getInt(0), current.getString(1));
 				_actionTaskDialog.show(getFragmentManager(), "actionTask");
 				return true;
 			}
@@ -96,7 +88,7 @@ public boolean onOptionsItemSelected(MenuItem item) {
 	private static final int TASK_N_DATE = 15;
 
 	private void addTask() {
-		Intent intent = new Intent(this, AddNewTodoItemActivity.class);
+		Intent intent = new Intent(this, AddNewTodoTaskActivity.class);
 		startActivityForResult(intent, TASK_N_DATE);
 	}
 
@@ -111,17 +103,17 @@ protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 			// add the item
 			if(task != null) {
 				if(task.length() > 0) {
-					_listItems.add(new Pair<String, Long>(task, date));
-					_adapter.notifyDataSetChanged();
+					_helper.addTask(new TodoTask(task, date));
+					_adapter.changeCursor(_helper.getAllTasks());			
 				}
 			}
 		}
 	}
 
 	@Override
 	public void onDialogPositiveClick(ActionTaskDialog dialog) {
-		_listItems.remove(dialog.getPos());
-		_adapter.notifyDataSetChanged();
+		_helper.deleteTask(dialog.getPos());
+		_adapter.changeCursor(_helper.getAllTasks());
 	}
 
 	@Override
@@ -132,6 +124,5 @@ public void onDialogNegativeClick(ActionTaskDialog dialog) {
 	@Override
 	public void onDestroy() {
 		super.onDestroy();
-		_dataFragment.setData(_listItems);
 	}
 }

TodoListManager/src/il/ac/huji/todolist/TodoTask.java

@@ -14,6 +14,11 @@ public TodoTask(int id, String title, long due) {
 		this._title = title;
 		this._due = due;
 	}
+
+	public TodoTask(String title, long due) {
+		this._title = title;
+		this._due = due;
+	}
 
 	public int getID() {
 		return _id;

TodoListManager/src/il/ac/huji/todolist/TodoTaskCursorAdapter.java

@@ -0,0 +1,62 @@
+package il.ac.huji.todolist;
+
+import java.util.Date;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.graphics.Color;
+import android.support.v4.widget.CursorAdapter;
+import android.text.format.DateFormat;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+public class TodoTaskCursorAdapter extends CursorAdapter {
+	private int _layout;
+
+	public TodoTaskCursorAdapter(Context context, Cursor c) {
+		super(context, c, CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
+		_layout = R.layout.todo_task;
+	}
+
+	@Override
+	public void bindView(View view, Context context, Cursor cursor) {
+		TextView taskTitle = (TextView)view.findViewById(R.id.txtTodoTitle);
+		taskTitle.setText(cursor.getString(cursor.getColumnIndex(cursor.getColumnName(1))));
+
+		TextView taskDueDate = (TextView)view.findViewById(R.id.txtTodoDueDate);
+
+		Long today = System.currentTimeMillis();
+		Long taskDue = cursor.getLong(cursor.getColumnIndex(cursor.getColumnName(2)));
+
+		if (taskDue == null) { // should not happen
+			taskDueDate.setText(context.getResources().getString(R.string.no_due_date));
+		}
+		else {
+			Date date = new Date(); 
+			date.setTime(taskDue);
+			String dueDate = DateFormat.getDateFormat(context).format(date);
+			taskDueDate.setText(dueDate);
+		}
+
+		if (today - taskDue > 0) { // over due
+			taskTitle.setTextColor(Color.RED);
+			taskDueDate.setTextColor(Color.RED);
+		}
+		else {
+			taskTitle.setTextColor(Color.BLACK);
+			taskDueDate.setTextColor(Color.BLACK);
+		}
+	}
+
+	@Override
+	public View newView(Context context, Cursor cursor, ViewGroup parent) {
+		// when the view will be created for first time, we inflate the row layout
+		LayoutInflater inflater = LayoutInflater.from(parent.getContext());
+		View view = inflater.inflate(_layout, parent, false);
+
+		return view;
+	}
+
+}