Android Open Source - ExampleApp C Location Provider

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License

The source code is released under:

Copyright (c) 2014, Altinn All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redis...

Java Source Code

package com.altinn.apps.fisher.gps;
/**/*from w  w w  .jav  a 2 s.  c om*/
 * Currently not in Use
 */

import android.content.Context;
import android.location.Criteria;
import android.location.GpsStatus;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;

import com.altinn.apps.fisher.utils.Utils;

public class CLocationProvider implements LocationListener {
  private static CLocationProvider instance;
  private ILocationUpdateListner listner;
  private Context mContext;
  private LocationManager mLocationManager;
  private LocationProvider mLocationProvider;

  private final long UPDATE_FREQUENCY = 30 * 1000;// 10*60*1000;//10 Mins
  private final long UPDATE_ACCURACY = 10;// 100 meters
  private HandlerThread mThread;// = new HandlerThread("UIHandler");
  private CHandler mHandler;
  private final int GPS_FIX_TYPE_CELLID = 100;
  private final int GPS_FIX_TYPE_INBUILD = 101;
  private int mGPSFixType = GPS_FIX_TYPE_CELLID;
  private final long GPS_FIX_TIMEOUT_CELLID = 1000 * 30; // 10sec

  private final int START_INIT = 0;
  private final int START_GPS_FIX = 1;
  private final int NOTIFY_INIT_COMPLETE = 2;
  private final int NOTIFY_LOCATION_UPDATE = 3;

  private CLocationProvider(Context context) {
    mContext = context;
    mThread = new HandlerThread("UIHandler");
    mThread.start();
    mHandler = new CHandler(mThread.getLooper());
  }

  public static CLocationProvider getInstance(Context context) {
    if (instance == null) {
      instance = new CLocationProvider(context);
    }
    return instance;
  }

  private void init() {

    System.out.println("---init+++  mContext :" + mContext);
    mLocationManager = (LocationManager) mContext
        .getSystemService(Context.LOCATION_SERVICE);
    System.out.println("--- mLocationManager :" + mLocationManager);
    mLocationProvider = mLocationManager
        .getProvider(LocationManager.GPS_PROVIDER);
    System.out.println("---mLocationProvider----" + mLocationProvider);

    // This code work for tablet/ API-Level 9 needed
    if (Utils.isNetworkAvailable(mContext) && Utils.isAPIsupported() && iSGPSEnabled()) {// get
                                      // CELL_ID
                                      // Based
                                      // FIX
                                      // [FOR
                                      // fist
                                      // FIX]
      Criteria criteria = new Criteria();
      criteria.setAccuracy(Criteria.ACCURACY_COARSE);
      criteria.setCostAllowed(true);
      criteria.setBearingAccuracy(Criteria.ACCURACY_COARSE);
      mGPSFixType = GPS_FIX_TYPE_CELLID;
      mLocationManager.requestSingleUpdate(criteria, this,
          mThread.getLooper());
      mHandler.sendEmptyMessageDelayed(START_GPS_FIX,
          GPS_FIX_TIMEOUT_CELLID);
    } else {
      mHandler.sendEmptyMessageDelayed(START_GPS_FIX, 0);
    }
    System.out.println("---init----");

    mLocationManager.addGpsStatusListener(new GpsStatus.Listener() {

      public void onGpsStatusChanged(int event) {
        switch (event) {
        case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
          System.out.println("GPS_EVENT_SATELLITE_STATUS :" + event);
          break;
        case GpsStatus.GPS_EVENT_STARTED:
          System.out.println("GPS_EVENT_STARTED :" + event);
          break;
        case GpsStatus.GPS_EVENT_FIRST_FIX:
          System.out.println("GPS_EVENT_FIRST_FIX :" + event);
          break;
        case GpsStatus.GPS_EVENT_STOPPED:
          System.out.println("GPS_EVENT_STOPPED :" + event);
          break;
        }

      }
    });

    mHandler.sendEmptyMessage(NOTIFY_INIT_COMPLETE);

    // List<String> prividesList = mLocationManager.getAllProviders();
    // for (String providerNameStr :prividesList){
    // System.out.println("Provider  :" + providerNameStr);
    // if(providerNameStr != null){
    // onLocationChanged(mLocationManager.getLastKnownLocation(providerNameStr));
    // }
    // }

  }

  public void registerListner(ILocationUpdateListner listner) {
    this.listner = listner;
  }

  public boolean iSGPSEnabled() {
    boolean result = false;
    if (mLocationProvider != null) {
      result = mLocationManager.isProviderEnabled(mLocationProvider
          .getName());
    }
    return result;
  }

  public void onLocationChanged(Location location) {
    System.out.println("onLocationChanged+++" + location);

    if (location != null) {
      // listner.onLocationChange(location);
      Message msg = Message.obtain(mHandler);
      msg.what = NOTIFY_LOCATION_UPDATE;
      msg.obj = location;
      //mHandler.sendMessageDelayed(msg, 5*1000);
      mHandler.sendMessage(msg);

    }
    if (mGPSFixType != GPS_FIX_TYPE_INBUILD) {
      mHandler.sendEmptyMessageDelayed(START_GPS_FIX, 0);
    }
    System.out.println("onLocationChanged---");

  }

  public void onProviderDisabled(String provider) {
    System.out.println("onProviderDisabled---" + provider);

  }

  public void onProviderEnabled(String provider) {
    System.out.println("onProviderEnabled---" + provider);

  }

  public void onStatusChanged(String provider, int status, Bundle extras) {
    // TODO Auto-generated method stub

  }

  public void stop() {
    try {
      if (mLocationManager != null)
        mLocationManager.removeUpdates(this);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public void start() {
    stop();
    mHandler.sendEmptyMessage(START_INIT);
  }

  private class CHandler extends Handler {

    public CHandler(Looper looper) {
      super(looper);
    }

    @Override
    public void handleMessage(Message msg) {
      switch (msg.what) {
      case START_INIT:
        init();
        break;
      case START_GPS_FIX:
        if (mLocationProvider != null) {
          System.out.println("---mLocationProvider.getName----"
              + mLocationProvider.getName());
          mGPSFixType = GPS_FIX_TYPE_INBUILD;
          mLocationManager.removeUpdates(CLocationProvider.this);
          mLocationManager.requestLocationUpdates(
              mLocationProvider.getName(), UPDATE_FREQUENCY,
              UPDATE_ACCURACY, CLocationProvider.this);
        }
        break;
      case NOTIFY_INIT_COMPLETE:
        if (listner != null)
          listner.onInitializationComplete();
        break;
      case NOTIFY_LOCATION_UPDATE:
        if (listner != null) {
          Location lObj = (Location)msg.obj;
          listner.onLocationChange(lObj);
        }
        break;

      }

    }

  }

}

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