Android Open Source - coursera-android-001 To Do List Adapter

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License

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

package course.labs.todomanager;
// w w w  . j a  v  a2  s  .c  o  m
import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.graphics.Color;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.RelativeLayout;
import android.widget.TextView;

import org.w3c.dom.Text;

import course.labs.todomanager.ToDoItem.Status;

public class ToDoListAdapter extends BaseAdapter {

  // List of ToDoItems
  private final List<ToDoItem> mItems = new ArrayList<ToDoItem>();
  
  private final Context mContext;

  private static final String TAG = "Lab-UserInterface";

  public ToDoListAdapter(Context context) {

    mContext = context;

  }

  // Add a ToDoItem to the adapter
  // Notify observers that the data set has changed

  public void add(ToDoItem item) {

    mItems.add(item);
    notifyDataSetChanged();

  }
  
  // Clears the list adapter of all items.
  
  public void clear(){

    mItems.clear();
    notifyDataSetChanged();
  
  }

  // Returns the number of ToDoItems

  @Override
  public int getCount() {

    return mItems.size();

  }

  // Retrieve the number of ToDoItems

  @Override
  public Object getItem(int pos) {

    return mItems.get(pos);

  }

  // Get the ID for the ToDoItem
  // In this case it's just the position

  @Override
  public long getItemId(int pos) {

    return pos;

  }

  //Create a View to display the ToDoItem 
  // at specified position in mItems

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {


    //Get the current ToDoItem
    final ToDoItem toDoItem = (ToDoItem) getItem(position);

    //Inflate the View for this ToDoItem from todo_item.xml
    final RelativeLayout itemLayout = (RelativeLayout) ((LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.todo_item, null);
    
    //Fill in specific ToDoItem data
    // Remember that the data that goes in this View
    // corresponds to the user interface elements defined 
    // in the layout file

    //Display Title in TextView
    final TextView titleView = (TextView) itemLayout.findViewById(R.id.titleView);
        titleView.setText(toDoItem.getTitle());
    
    // Set up Status CheckBox
    final CheckBox statusView = (CheckBox) itemLayout.findViewById(R.id.statusCheckBox);
        statusView.setChecked(toDoItem.getStatus() == Status.DONE);

        setBackgroundColor(toDoItem.getStatus() == Status.DONE, itemLayout);
    
    if (statusView != null) {
            statusView.setOnCheckedChangeListener(new OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                    log("Entered onCheckedChanged()");

                    // Set up and implement an OnCheckedChangeListener, which
                    // is called when the user toggles the status checkbox
                    if (isChecked) {
                        toDoItem.setStatus(Status.DONE);
                    } else {
                        toDoItem.setStatus(Status.NOTDONE);
                    }

                    setBackgroundColor(isChecked, itemLayout);
                }
            });
        }

    //Display Priority in a TextView
    final TextView priorityView = (TextView) itemLayout.findViewById(R.id.priorityView);
        priorityView.setText(toDoItem.getPriority().name());
    
    //Display Time and Date.
    // Hint - use ToDoItem.FORMAT.format(toDoItem.getDate()) to get date and time String
    final TextView dateView = (TextView) itemLayout.findViewById(R.id.dateView);
        dateView.setText(ToDoItem.FORMAT.format(toDoItem.getDate()));

    // Return the View you just created
    return itemLayout;

  }

    private void setBackgroundColor(Boolean isDone, RelativeLayout itemLayout) {
        if (isDone) {
            itemLayout.setBackgroundColor(Color.GRAY);
        } else {
            itemLayout.setBackgroundColor(Color.BLACK);
        }
    }
  
  private void log(String msg) {
    try {
      Thread.sleep(500);
    } catch (InterruptedException e) {
      e.printStackTrace();
    }
    Log.i(TAG, msg);
  }

}
Java Source Code List
