Android Open Source - groceryhelper List Activity

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From Project

Back to project page groceryhelper.

License

The source code is released under:

Apache License

Java Source Code

package com.munner.groceryhelper;
/*from   w  w  w. ja  v  a2  s . c o m*/
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.inputmethod.EditorInfo;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import android.widget.Toast;

public class ListActivity extends Activity{

  private static final String PREFERENCES = "preferences";
  ArrayAdapter<String> adapter;
  ArrayList<String> al;
  ListView lv;;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_list);

    al = new ArrayList<String>();

    Set<String> set = new HashSet<String>();
    SharedPreferences info = getSharedPreferences(PREFERENCES, 0);
    al.addAll(info.getStringSet("set", set));
    
    adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_activated_1, al);
    lv = (ListView) findViewById(R.id.listGList);
    lv.setAdapter(adapter);

    EditText et = (EditText) findViewById(R.id.ListText1);
    et.setOnEditorActionListener(new OnEditorActionListener() {
      @Override
      public boolean onEditorAction(TextView et, int actionId, KeyEvent event) {
        boolean handled = false;
        if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_DOWN){
          if (et.getText().toString().equals("")) {
            //do nothing
          }
          else { 
            al.add(et.getText().toString());
            adapter.notifyDataSetChanged();
            et.setText(null);
            saveinfo();
          }
          handled = true;
        }
        return handled;
      }

    });

  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.list, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    
    switch (id) {
    
    case R.id.action_settings:
      return true;
      
    case R.id.resetList:
      al.clear();
      adapter.notifyDataSetChanged();
      break;
    case R.id.listCheck:
      int index = lv.getCheckedItemPosition();
      if (index == -1) {
        Toast.makeText(getApplicationContext(), "Nothing Selected", Toast.LENGTH_SHORT).show();
      }
      else {
        Toast.makeText(getApplicationContext(), al.get(index) + " Removed", Toast.LENGTH_SHORT).show();        
        al.remove(index);
        adapter.notifyDataSetChanged();
        lv.clearChoices();

      }
      break;
    default: 
      break;
    }
    saveinfo();
    
    return super.onOptionsItemSelected(item);
  }
  
  @Override
  public void onStop() {
    super.onStop();
    saveinfo();
  }

  protected void saveinfo() {
    Set<String> set = new HashSet<String>();
    set.addAll(al);
    SharedPreferences info = getSharedPreferences(PREFERENCES, 0);
    SharedPreferences.Editor editor = info.edit();
    editor.putStringSet("set", set);
    editor.commit();
  }
  
}

Java Source Code List

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