LunchList.java

package apt.tutorial;

import android.app.ListActivity;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.LayoutInflater;
import android.widget.AdapterView;
import android.widget.CursorAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RadioGroup;
import android.widget.TabHost;
import android.widget.TextView;

public class LunchList extends ListActivity {
	public final static String ID_EXTRA="apt.tutorial._ID";
	Cursor model=null;
	RestaurantAdapter adapter=null;
	EditText name=null;
	EditText address=null;
	EditText notes=null;
	RadioGroup types=null;
	RestaurantHelper helper=null;
	SharedPreferences prefs=null;
	Shaker shaker=null;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		
		helper=new RestaurantHelper(this);
		prefs=PreferenceManager.getDefaultSharedPreferences(this);
		
		name=(EditText)findViewById(R.id.name);
		address=(EditText)findViewById(R.id.addr);
		notes=(EditText)findViewById(R.id.notes);
		types=(RadioGroup)findViewById(R.id.types);
		
		initList();
		prefs.registerOnSharedPreferenceChangeListener(prefListener);
	}

	@Override
	public void onPause() {
		super.onPause();
		
		shaker.close();
	}
	
	@Override
	public void onResume() {
		super.onResume();
		
		shaker=new Shaker(this, 1.45d, 500, onShake);
	}
	
	@Override
	public void onDestroy() {
		super.onDestroy();
		
		helper.close();
	}
	
	@Override
	public void onListItemClick(ListView list, View view,
															int position, long id) {
		Intent i=new Intent(LunchList.this, DetailForm.class);

		i.putExtra(ID_EXTRA, String.valueOf(id));
		startActivity(i);
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		new MenuInflater(this).inflate(R.menu.option, menu);

		return(super.onCreateOptionsMenu(menu));
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		if (item.getItemId()==R.id.add) {
			startActivity(new Intent(LunchList.this, DetailForm.class));
			
			return(true);
		}
		else if (item.getItemId()==R.id.prefs) {
			startActivity(new Intent(this, EditPreferences.class));
		
			return(true);
		}
		else if (item.getItemId()==R.id.search) {
			onSearchRequested();
			
			return(true);
		}

		return(super.onOptionsItemSelected(item));
	}
	
	private void initList() {
		if (model!=null) {
			stopManagingCursor(model);
			model.close();
		}
		
		String where=null;

		if (Intent.ACTION_SEARCH.equals(getIntent().getAction())) {
			where="name LIKE \"%"+getIntent().getStringExtra(SearchManager.QUERY)+"%\"";
		}
		
		model=helper.getAll(where, prefs.getString("sort_order", "name"));
		startManagingCursor(model);
		adapter=new RestaurantAdapter(model);
		setListAdapter(adapter);
	}
	
	private Shaker.Callback onShake=new Shaker.Callback() {
		public void shakingStarted() {
			// no-op -- only care when the shaking stops
		}
		
		public void shakingStopped() {
			int selection=(int)(adapter.getCount()*Math.random());
			Intent i=new Intent(LunchList.this, DetailForm.class);
			
			i.putExtra(ID_EXTRA,
									String.valueOf(adapter.getItemId(selection)));
			startActivity(i);
		}
	};
	
	private SharedPreferences.OnSharedPreferenceChangeListener prefListener=
	 new SharedPreferences.OnSharedPreferenceChangeListener() {
		public void onSharedPreferenceChanged(SharedPreferences sharedPrefs,
																					String key) {
			if (key.equals("sort_order")) {
				initList();
			}
		}
	};
	
	class RestaurantAdapter extends CursorAdapter {
		RestaurantAdapter(Cursor c) {
			super(LunchList.this, c);
		}
		
		@Override
		public void bindView(View row, Context ctxt,
												 Cursor c) {
			RestaurantHolder holder=(RestaurantHolder)row.getTag();
			
			holder.populateFrom(c, helper);
		}
		
		@Override
		public View newView(Context ctxt, Cursor c,
												 ViewGroup parent) {
			LayoutInflater inflater=getLayoutInflater();
			View row=inflater.inflate(R.layout.row, parent, false);
			RestaurantHolder holder=new RestaurantHolder(row);
			
			row.setTag(holder);
			
			return(row);
		}
	}
	
	static class RestaurantHolder {
		private TextView name=null;
		private TextView address=null;
		private ImageView icon=null;
		private View row=null;
		
		RestaurantHolder(View row) {
			this.row=row;
			
			name=(TextView)row.findViewById(R.id.title);
			address=(TextView)row.findViewById(R.id.address);
			icon=(ImageView)row.findViewById(R.id.icon);
		}
		
		void populateFrom(Cursor c, RestaurantHelper helper) {
			name.setText(helper.getName(c));
			address.setText(helper.getAddress(c));
	
			if (helper.getType(c).equals("sit_down")) {
				icon.setImageResource(R.drawable.ball_red);
			}
			else if (helper.getType(c).equals("take_out")) {
				icon.setImageResource(R.drawable.ball_yellow);
			}
			else {
				icon.setImageResource(R.drawable.ball_green);
			}
		}
	}
}