MainActivity.java

package org.djd.busntrain;

import org.djd.busntrain.bus.BusFavoriteActivity;
import org.djd.busntrain.bus.BusRouteActivity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import org.djd.busntrain.train.TrainRouteActivity;

public class MainActivity extends Activity {

  private static final String TAG = MainActivity.class.getSimpleName();

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.entrance_view);
  }

  /**
   * Callback method in the event of any button is clicked.
   *
   * @param view
   */
  public void onButtonClicked(View view) {
    Intent intent = null;
    switch (view.getId()) {
      case R.id.main_favorite_button_id:
        intent = new Intent(this, BusFavoriteActivity.class);
        break;
      case R.id.main_bus_button_id:
        intent = new Intent(this, BusRouteActivity.class);
        break;
      case R.id.main_train_button_id:
        intent = new Intent(this, TrainRouteActivity.class);
        Toast.makeText(this, "In Beta.", Toast.LENGTH_SHORT).show();
        break;
    }

    if (null != intent) {
      startActivity(intent);
    } else {
      Toast.makeText(this, R.string.msg_sys_no_case_defined_error, Toast.LENGTH_SHORT).show();
      Log.e(TAG, getString(R.string.msg_sys_no_case_defined_error));

    }
  }
}