Android Open Source - location-data Main Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.example.locationtracker;
// w ww . j a  v  a 2s.co m
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.location.Location;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
//import android.widget.EditText;
import android.widget.TextView;

class TextViewLocationUpdate implements ILocationCallback {
  private Activity parentActivity;
  
  TextViewLocationUpdate(Activity parentActivity) {
    this.parentActivity = parentActivity;
  }
  
  public void call(Location location) {
    TextView tvlat = (TextView) this.parentActivity.findViewById(R.id.text_latitude);
    TextView tvlng = (TextView) this.parentActivity.findViewById(R.id.text_longitude);
    
    tvlat.setText(String.valueOf(location.getLatitude()));
    tvlng.setText(String.valueOf(location.getLongitude()));
  }
}


class UpdateReceiver extends BroadcastReceiver {
  private GPSTracker gpsTracker;
  
  UpdateReceiver(GPSTracker gpsTracker) {
    this.gpsTracker = gpsTracker;
  }
  
@Override
public void onReceive(Context context, Intent intent) {


     ConnectivityManager connectivityManager = (ConnectivityManager) 
                                  context.getSystemService(Context.CONNECTIVITY_SERVICE );
     NetworkInfo activeNetInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
     boolean isConnected = activeNetInfo != null && activeNetInfo.isConnectedOrConnecting();   
     if (isConnected) {
         this.gpsTracker.connected();
     };
   }
}


public class MainActivity extends ActionBarActivity {
  public final static String EXTRA_MESSAGE = "com.example.locationtracker.MESSAGE";
  
  private GPSTracker gpsTracker;
  private TextViewLocationUpdate locationUpdater;

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

    if (savedInstanceState == null) {
      getSupportFragmentManager().beginTransaction()
          .add(R.id.container, new PlaceholderFragment()).commit();
    }
    
    this.locationUpdater = new TextViewLocationUpdate(this);
    
    this.gpsTracker = new GPSTracker(this);
    this.gpsTracker.onLocationUpdate(this.locationUpdater);
    
    Context ctx = this.getApplicationContext();
    ctx.registerReceiver(new UpdateReceiver(this.gpsTracker),
                   new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, 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();
    if (id == R.id.action_settings) {
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  /**
   * A placeholder fragment containing a simple view.
   */
  public static class PlaceholderFragment extends Fragment {

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
      View rootView = inflater.inflate(R.layout.fragment_main, container,
          false);
      return rootView;
    }
  }
}

Java Source Code List

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