Android Open Source - GpsExample Main Activity

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License

The source code is released under:

MIT License

Java Source Code

package me.kaipi.gpsexample;
/*  w w w  .  j  a va 2  s. c  om*/
import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningServiceInfo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.location.Location;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends Activity {
  private static final String TAG = "MainActivity";
  int interval = 1;
  private BroadcastReceiver locationReceiver = new LocationReceiver();
  private Timer serviceTextTimer = null;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    setServiceText();
  }
  
  @Override
  protected void onResume() {
    super.onResume();
    IntentFilter filter = new IntentFilter(GpsService.LOCATION_BROADCAST_ACTION);
    this.registerReceiver(this.locationReceiver, filter);
    this.serviceTextTimer = new Timer();
    this.serviceTextTimer.scheduleAtFixedRate(new TimerTask(){
      @Override public void run() {
        runOnUiThread(new Runnable(){ @Override public void run() { setServiceText(); } });
      }      
    }, 0, 1000);
  }
  
  @Override
  protected void onPause() {
    super.onPause();
    this.unregisterReceiver(this.locationReceiver);
    this.serviceTextTimer.cancel();
  }
  
  public void startService(View v) {
    Intent serviceIntent = new Intent(this, GpsService.class);
    serviceIntent.putExtra(GpsService.BROADCAST_INTERVAL, this.interval);
    this.interval = this.interval % 5 + 1;
    this.startService(serviceIntent);
    Log.d(TAG, "Thread id: " + Thread.currentThread().getId());
  }
  
  public void stopService(View v) {
    Intent serviceIntent = new Intent(this, GpsService.class);
    this.stopService(serviceIntent);
  }
  
  private void setServiceText() {
    TextView serviceText = (TextView)findViewById(R.id.serviceText);
    if (isServiceRunning())
      serviceText.setText(getString(R.string.serviceRunning));
    else
      serviceText.setText(getString(R.string.serviceNotRunning));
  }
  
  private boolean isServiceRunning() {
    ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
      for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE))
          if (GpsService.class.getName().equals(service.service.getClassName()))
              return true;
      return false;
  }
  
  private class LocationReceiver extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent) {
      Location location = intent.getParcelableExtra(GpsService.LOCATION_EXTRA);
      Log.d(TAG, "Location received: " + location.getTime());
      Log.d(TAG, "Thread id: " + Thread.currentThread().getId());
    }
  }

}

Java Source Code List

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