Android Open Source - GroceryList Current List Activity

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License

The source code is released under:

* Copyright (c) 2011, Josh Watts. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are m...

Java Source Code

package net.sroz.grocerylist;
/*from ww w  .  j  a va2  s.c o  m*/
import net.sroz.grocerylist.R;
import android.app.Activity;
import android.app.Dialog;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.CheckedTextView;
import android.widget.CursorAdapter;
import android.widget.ListView;
import android.widget.AutoCompleteTextView;
import android.widget.Toast;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.view.ViewGroup;


public class CurrentListActivity extends Activity {
  AutoCompleteTextView tvNewItem;
  Button btnAddItem;
  ListView lvItems;
  LayoutInflater mFactory;
  List current_list; 
  Cursor mCursor;
  
  static final int DIALOG_LIST_ID = 0;
  
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        tvNewItem = (AutoCompleteTextView)findViewById(R.id.tvNewItem);
        btnAddItem = (Button)findViewById(R.id.btnAddItem);
        lvItems = (ListView)findViewById(R.id.lvItems);
        
        mFactory = LayoutInflater.from(this);
        
        set_current_list(get_last_list());
        
      lvItems.setOnItemClickListener(new OnItemClickListener() {
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        CheckedTextView cv = (CheckedTextView) view;
        boolean isChecked = !cv.isChecked();
        CurrentListActivity.toggle_item(getApplicationContext(), id, isChecked);
      }
    });
      lvItems.setOnItemLongClickListener(new OnItemLongClickListener() {
      public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
        /* TODO Show context menu on long click */
        CurrentListActivity.delete_item(getApplicationContext(), id);
        return true;
      }
      });
        
        btnAddItem.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
          CurrentListActivity.add_item(getApplicationContext(), tvNewItem.getText().toString());
          tvNewItem.setText("");
        }
        });
        
        tvNewItem.setOnKeyListener(new OnKeyListener() {
      public boolean onKey(View v, int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_ENTER && event.getAction() == KeyEvent.ACTION_UP) {
          // XXX This should be moved to it's own method in the Activity
            CurrentListActivity.add_item(getApplicationContext(), tvNewItem.getText().toString());
            tvNewItem.setText("");
          return true;
        }
        return false;
      }
    });
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
      getMenuInflater().inflate(R.menu.main, menu);
      return true;
    }
    
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
      boolean haveItems = (CurrentListActivity.get_item_count(getApplicationContext()) > 0);
    menu.findItem(R.id.checkout).setEnabled(haveItems);
    menu.findItem(R.id.clear).setEnabled(haveItems);
      menu.findItem(R.id.settings).setEnabled(false);
      return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
      boolean ret = false;
      int id = item.getItemId();
      switch (id) {
        case R.id.checkout:
          delete_checked_items(getApplicationContext());
          ret = true;
          break;
        case R.id.clear:
          delete_all_items(getApplicationContext());
          ret = true;
          break;
        case R.id.settings:
          Toast.makeText(getApplicationContext(), "Not yet implemented", Toast.LENGTH_SHORT).show();
          ret = true;
          break;
        case R.id.list:
          showDialog(DIALOG_LIST_ID);
          break;
        default:
          ret = super.onOptionsItemSelected(item);
      }
      return ret;
    }
    
    @Override
    public Dialog onCreateDialog(int id) {
      Dialog dialog = null;
      switch (id) {
        case DIALOG_LIST_ID:
          //TODO: Build list selection dialog
          break;
        default:
          break;
      }
      return dialog;
    }
    
    
  private class GroceryListAdapter extends CursorAdapter {
    public GroceryListAdapter(Context context, Cursor c) {
      super(context, c);
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
      return mFactory.inflate(android.R.layout.simple_list_item_multiple_choice, parent, false);
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
      final Item item = new Item(cursor);
      CheckedTextView cv = (CheckedTextView) view;
      cv.setText(item.text);
      cv.setChecked(item.checked);
    }
  }
  
  public static Item get_item(ContentResolver resolver, long id) {
    Uri uri = ContentUris.withAppendedId(Provider.CONTENT_URI, id);
    Cursor c = resolver.query(uri, Provider.ITEMS_QUERY_COLUMNS, null, null, null);
    Item item = null;
    if (c != null) {
      if (c.moveToFirst()) {
        item = new Item(c);
      }
      c.close();
    }
    return item;
  }
  
    public static int get_item_count(Context c) {
    Cursor cursor = null;
    int count = 0;
    cursor = c.getContentResolver().query(Provider.CONTENT_URI, new String[] {"COUNT(_ID) as count"}, null, null, null);
    if (cursor != null) {
      if (cursor.moveToFirst()) {
        cursor.moveToFirst();
        count = cursor.getInt(cursor.getColumnIndex("count"));
      }
    }
    return count; 
  }

  public static void add_item(Context c, String text) {
    if (TextUtils.isEmpty(text))
      return;
    Item item = find_item(c, text);
    if (item != null) {
      Toast.makeText(c, "Item already in list", Toast.LENGTH_SHORT).show();
      return;
    }
    ContentValues values = new ContentValues(1);
    values.put(Provider.KEY_TEXT, text);
    c.getContentResolver().insert(Provider.CONTENT_URI, values);  
  }

  private static Item find_item(Context c, String text) {
    Item item = null;
    Cursor cursor = null;
    cursor = c.getContentResolver().query(Provider.CONTENT_URI, Provider.ITEMS_QUERY_COLUMNS, Provider.KEY_TEXT+"=?", new String[] {text}, null);
    if (cursor != null) {
      if (cursor.moveToFirst()) {
        cursor.moveToFirst();
        item = new Item(cursor);
      }
    }
    return item;
  }

  public static void delete_item(Context c, long id) {
    Uri uri = ContentUris.withAppendedId(Provider.CONTENT_URI, id);
    c.getContentResolver().delete(uri, null, null);
  }
  
  public static void delete_all_items(Context c) {
    c.getContentResolver().delete(Provider.CONTENT_URI, null, null);
  }
  
  public static void delete_checked_items(Context c) {
    c.getContentResolver().delete(Provider.CONTENT_URI, Provider.KEY_CHECKED + "=?", new String[] {Integer.toString(1)});
  }

  public static void toggle_item(Context c, long id, boolean isChecked) {
    ContentValues values = new ContentValues(1);
    values.put(Provider.KEY_CHECKED, isChecked ? 1 : 0);
    
    Uri uri = ContentUris.withAppendedId(Provider.CONTENT_URI, id);
    c.getContentResolver().update(uri, values, null, null);
  }

  public static List get_list(long id) {
    List list = null;
    
    
    
    return list;
  }
  
  public static List get_last_list() {
    Long id = 0l;
    List list = null;
  
    //TODO: Figure out how to use settings to get last list_id
    list = get_list(id);
    
    return list;
  }
  
  public void set_current_list(List list) {
    current_list = list;
    mCursor = getContentResolver().query(Provider.CONTENT_URI, Provider.ITEMS_QUERY_COLUMNS, Provider.KEY_LIST_ID + "=?", new String[] {Long.toString(list.id)}, Provider.DEFAULT_SORT_ORDER);
        lvItems.setAdapter(new GroceryListAdapter(this, mCursor));
  }

}

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