Android Open Source - DKO View Manufacturers Activity

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License

The source code is released under:

GNU Lesser General Public License

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Java Source Code

package org.kered.contactlensfinder;
//w  w w  .java 2  s .  co m
import static org.kered.dko.SQLFunction.LOWER;

import java.util.List;

import org.kered.contactlensfinder.dko.Manufacturer;
import org.kered.dko.Query;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class ViewManufacturersActivity extends ActionBarActivity {

  private ListView listView;

  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_view_manufacturers);

    ActionBar supportActionBar = getSupportActionBar();
    supportActionBar.setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);

    listView = (ListView) findViewById(R.id.view_manufacturers);

    // Define the query (note the case-insensitive order-by using the SQL LOWER() function).
    Query<Manufacturer> query = Manufacturer.ALL.orderBy(LOWER(Manufacturer.NAME));
    
    // The method asList() is a terminal operation (it doesn't return another query), 
    // so this is where the database is actually called.  Note that Query objects 
    // are Iterable, so if you're in a loop the asList() is unnecessary (in fact 
    // it's counter-productive, as DKOs will steam when used as an Iterable).
    final List<String> names = query.asList(Manufacturer.NAME);

    // The above calls are split out to highlight the types.  However it 
    // would be more common to chain them all together as such:
    
    //final String[] names = Manufacturer.ALL
    //    .orderBy(LOWER(Manufacturer.NAME))
    //    .asList(Manufacturer.NAME);

    final int resource = R.layout.basic_list_item;

    // Set the adapter for the list view
    listView.setAdapter(new ArrayAdapter<String>(this, resource, names));
    // Set the list's click listener
    listView.setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
        Intent k = new Intent(ViewManufacturersActivity.this, ViewProductsActivity.class);
        String name = names.get(arg2);
        
        // Looks up the manufacturer.  If more than one record is returned, get()
        // will throw a RuntimeException.
        Manufacturer m = Manufacturer.ALL.get(Manufacturer.NAME.eq(name));
        
        k.putExtra("manufacturer_id", m.getId());
        startActivity(k);
      }
    });
  }

}

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