我想创建一个类似的应用程序：
我已经有sqlite数据库，其中包含许多城市的信息（纬度，经度）。
我搜索了Google和SO但未找到合适的解决方案。
到目前为止，我的研究表明：
我要做的是创建Service或BroadcastReceiver以使用GPS获取手机的当前位置。
如果我出错了，请纠正我。
我想以10分钟的间隔获得手机的当前位置。并且根据纬度经度值，我将其与预定城市纬度经度进行比较。
如果匹配，则应该通知用户。
我做过的事情：
我知道如何获取用户的当前位置。 （但不是通过创造服务。这就是我想知道的！）
我可以在sqlite数据库中添加任务。
请指导我如何处理此应用程序。
当用户启动应用程序时启动它：
Intent i = new Intent(context, MyLocationApps.class);
context.startService(i);
public class MyLocationApps extends Service{
LocationManager locMan;
Location curLocation;
Boolean locationChanged;
LocationListener gpsListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Log.w("GPS", "Started");
if (curLocation == null) {
curLocation = location;
locationChanged = true;
}
if (curLocation.getLatitude() == location.getLatitude() && curLocation.getLongitude() == location.getLongitude())
locationChanged = false;
else
locationChanged = true;
curLocation = location;
if (locationChanged)
locMan.removeUpdates(gpsListener);
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
// Log.w("GPS", "Location changed", null);
}
public void onStatusChanged(String provider, int status,
Bundle extras) {
if (status == 0)// UnAvailable
{
} else if (status == 1)// Trying to Connect
{
} else if (status == 2) {// Available
}
}
};
@Override
public void onCreate() {
Toast.makeText(getBaseContext(),"Inside onCreate of Service", Toast.LENGTH_LONG).show();
Log.e(TAG, "Inside onCreate of Service");
super.onCreate();
locMan = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER,0, 0, gpsListener);
/*if (locMan.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER,20000, 1, gpsListener);
} else {
this.startActivity(new Intent("android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS"));
}
*/
if (curLocation != null) {
double lat = curLocation.getLatitude();
double lng = curLocation.getLongitude();
Toast.makeText(getBaseContext(),"Lat : " + String.valueOf(lat) + "\n Long : "+ String.valueOf(lng), Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(getBaseContext(),"Didn Get any location", Toast.LENGTH_LONG).show();
}
}
final String TAG="LocationService";
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(getBaseContext(),"Inside onStartCommand of Service", Toast.LENGTH_LONG).show();
Log.e(TAG, "Inside onStartCommand of Service");
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onLowMemory() {
// TODO Auto-generated method stub
super.onLowMemory();
}
@Override
public void onStart(Intent i, int startId)
{
Toast.makeText(getBaseContext(),"Inside onStart of Service", Toast.LENGTH_LONG).show();
Log.e(TAG, "Inside onStart of Service");
}
public IBinder onBind(Intent arg0) {
Log.e(TAG, "Inside onBind of Service");
return null;
}
}
代码中的问题
当我第一次运行应用程序时，它会显示Toast Messages。 但它永远不会显示Toast消息，即使我通过DDMS发送位置..
我哪里出错你能告诉我吗？
答案 0 :(得分：1)
在这里查看代码：android-mycycle/MyLocationManager.java
我已经为我的应用程序实现了这个。我在开始接收位置之前尝试获取gps修复。
答案 1 :(得分：1)
最后我得到了它的工作:(感谢Ganapathy＆amp; Farhan）
public class MyLocationApps extends Service{
LocationManager locMan;
Location curLocation;
Boolean locationChanged;
Handler handler = new Handler();
LocationListener gpsListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Log.w("GPS", "Started");
if (curLocation == null) {
curLocation = location;
locationChanged = true;
}
if (curLocation.getLatitude() == location.getLatitude() && curLocation.getLongitude() == location.getLongitude())
locationChanged = false;
else
locationChanged = true;
curLocation = location;
if (locationChanged)
locMan.removeUpdates(gpsListener);
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
// Log.w("GPS", "Location changed", null);
}
public void onStatusChanged(String provider, int status,
Bundle extras) {
if (status == 0)// UnAvailable
{
} else if (status == 1)// Trying to Connect
{
} else if (status == 2) {// Available
}
}
};
@Override
public void onCreate() {
Toast.makeText(getBaseContext(),"Inside onCreate of Service", Toast.LENGTH_LONG).show();
Log.e(TAG, "Inside onCreate of Service");
super.onCreate();
locMan = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER,0, 0, gpsListener);
/*if (locMan.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER,20000, 1, gpsListener);
} else {
this.startActivity(new Intent("android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS"));
}
*/
if (curLocation != null) {
double lat = curLocation.getLatitude();
double lng = curLocation.getLongitude();
Toast.makeText(getBaseContext(),"Lat : " + String.valueOf(lat) + "\n Long : "+ String.valueOf(lng), Toast.LENGTH_LONG).show();
}
else
{
Toast.makeText(getBaseContext(),"Didn Get any location", Toast.LENGTH_LONG).show();
}
}
final String TAG="LocationService";
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(getBaseContext(),"Inside onStartCommand of Service", Toast.LENGTH_LONG).show();
Log.e(TAG, "Inside onStartCommand of Service");
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onLowMemory() {
// TODO Auto-generated method stub
super.onLowMemory();
}
@Override
public void onStart(Intent i, int startId)
{
Toast.makeText(getBaseContext(),"Inside onStart of Service", Toast.LENGTH_LONG).show();
Log.e(TAG, "Inside onStart of Service");
handler.postDelayed(GpsFinder,5000);// will start after 5 seconds
}
public IBinder onBind(Intent arg0) {
Log.e(TAG, "Inside onBind of Service");
return null;
}
public Runnable GpsFinder = new Runnable()
{
public void run()
{
// TODO Auto-generated method stub
if (locMan.isProviderEnabled(LocationManager.GPS_PROVIDER))
{
locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER,0, 0, gpsListener);
}
else
{
getApplicationContext().startActivity(new Intent("android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS"));
}
if (curLocation != null) {
double lat = curLocation.getLatitude();
double lng = curLocation.getLongitude();
Toast.makeText(getBaseContext(),"Lat : " + String.valueOf(lat) + "\n Long : "+ String.valueOf(lng), Toast.LENGTH_LONG).show();
}
handler.postDelayed(GpsFinder,5000);// register again to start after 5 seconds...
}
};
}
答案 2 :(得分：0)
我认为您应该使用Geofence和intentservice。有关详细信息，请参阅official documentation。