Android Open Source - mapped Find Location Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.chalmers.frapp;
/* ww  w.j a  v a 2  s  . com*/
import java.util.Set;
import java.util.regex.Pattern;

import com.chalmers.frapp.database.Building;
import com.chalmers.frapp.database.LocationDatabase;
import com.chalmers.frapp.database.Parser;
import com.chalmers.frapp.database.Room;

import android.os.Bundle;
import android.preference.PreferenceManager;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.*;
import android.widget.AdapterView.OnItemSelectedListener;

public class FindLocationActivity extends Activity implements TextWatcher, OnItemSelectedListener {

  private static final Pattern splitPattern = Pattern.compile(",\\s");
  private AutoCompleteTextView textbox;
  private Spinner spinner;
  private LocationDatabase db;
  
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_find_location);

        try {
          Parser parser = new Parser(getAssets().open(getDatabaseName()));
          db = parser.getDatabase();

          final Set<String> allCategories = db.getAllCategories();
          String[] categoryArray = new String[allCategories.size() + 1];
          allCategories.toArray(categoryArray);
          categoryArray[allCategories.size()] = "";
          ArrayAdapter<String> adapterCategories = new ArrayAdapter<String>(this,
              android.R.layout.simple_spinner_dropdown_item, categoryArray);

          spinner = (Spinner) findViewById(R.id.spinner1);
          spinner.setAdapter(adapterCategories);
          spinner.setOnItemSelectedListener(this);

          textbox = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
            textbox.setThreshold(1);
            textbox.addTextChangedListener(this);
            
            spinner.setSelection(allCategories.size());
        } catch(Exception ex) {
          throw new RuntimeException(ex);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_find_location, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.menu_settings:
          Intent prefsIntent = new Intent(this, FRAPPPreferencesActivity.class);
          startActivity(prefsIntent);
            break;
        }
        return true;
    }
    
  @Override
  public void afterTextChanged(Editable s) {
    String[] data = splitPattern.split(textbox.getText());
    if(data.length == 2) {
      Building b = db.findBuilding(data[0]);
      Room r = null;
      if (b != null) {
        r = b.findRoom(data[1]);
      }
      if (r != null) {
        Intent intent = new Intent(this, DisplayLocationActivity.class);
        //intent.putExtra();
        intent.putExtra("building", data[0]);
        intent.putExtra("room", data[1]);
        startActivity(intent);
      }
    }
  }

  @Override
  public void beforeTextChanged(CharSequence s, int start, int count,
      int after) {
    // Empty
  }

  @Override
  public void onTextChanged(CharSequence s, int start, int before, int count) {
    // Empty
  }

  @Override
  public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
      long arg3) {
    String selected = (String) arg0.getSelectedItem();
        updateList(selected);
  }

  @Override
  public void onNothingSelected(AdapterView<?> arg0) {
    updateList("");
  }

  private void updateList(String category) {
    ArrayAdapter<String> adapter;
    if(category.isEmpty()) {
      adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_dropdown_item_1line, db.getStrings(category));
    } else {
      adapter = new ArrayAdapter<String>(this,
                  android.R.layout.simple_dropdown_item_1line, db.getStrings());
    }

        textbox.setAdapter(adapter);
  }
  
  private String getDatabaseName() {
        SharedPreferences p = PreferenceManager.getDefaultSharedPreferences(this);
        return p.getString(getString(R.string.pref_key_database), getString(R.string.pref_default_database));
  }
}

Java Source Code List

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