后台服务需要在服务器上发送 GPS 位置 [英] Background service needs to send GPS location on server
问题描述
我的 Android 应用程序有问题.我需要一个应用程序，它会每 10 分钟向服务器发送一次后台 GPS 位置(这里我有 WCF 服务可用).应用程序即使关闭也需要发送数据.所以我创建了一个服务(用于测试目的)在服务器上向我发送时间.但是，当我在服务中插入用于获取 GPS 位置的代码时，一切都失败了(意外停止).
I have problem with my Android application. I need an application that will send in background GPS location every 10 minutes to the server (here I have WCF service that work). Application needs to send data even if it is closed. So I created a service (for test purposes) that sends to me time on server. But when I insert my code for getting GPS location in my service everything fails (stopped unexpectedly).
我听说你需要放置一些接收器或其他东西，但到目前为止没有任何效果.所以如果有人能帮助我，我会很高兴.
I have reed that you need to put some receiver or something but nothing so far works. So I will be very pleased if someone can help me.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.biromatik.GPS"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="4" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".ETMGPSServiceActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:name=".MyApplication" >
<service
android:enabled="true"
android:name=".MonitorService" >
</service>
<receiver
android:enabled="true"
android:name=".LocationReceiver" >
<intent-filter >
<action android:name="com.biromatik.intent.action.LOCATION" />
</intent-filter>
</receiver>
</application>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.SEND_SMS"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
</manifest>
推荐答案
我已经在我的应用程序中执行此操作以执行您要求的相同操作.
I've done this in my app to do the same thing you asked.
在我的服务中，我添加了这个:
In my service I added this:
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
addLocationListener();
}
private void addLocationListener()
{
triggerService = new Thread(new Runnable(){
public void run(){
try{
Looper.prepare();//Initialise the current thread as a looper.
lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Criteria c = new Criteria();
c.setAccuracy(Criteria.ACCURACY_COARSE);
final String PROVIDER = lm.getBestProvider(c, true);
MyLocationListener myLocationListener = new MyLocationListener();
lm.requestLocationUpdates(PROVIDER, 600000, 0, myLocationListener);
Log.d("LOC_SERVICE", "Service RUNNING!");
Looper.loop();
}catch(Exception ex){
ex.printStackTrace();
}
}
}, "LocationThread");
triggerService.start();
}
public static void updateLocation(Location location)
{
Context appCtx = MyApplication.getAppContext();
double latitude, longitude;
latitude = location.getLatitude();
longitude = location.getLongitude();
Intent filterRes = new Intent();
filterRes.setAction("xxx.yyy.intent.action.LOCATION");
filterRes.putExtra("latitude", latitude);
filterRes.putExtra("longitude", longitude);
appCtx.sendBroadcast(filterRes);
}
class MyLocationListener implements LocationListener
{
@Override
public void onLocationChanged(Location location)
{
updateLocation(location);
}
}
注意:看到我使用 MyApplication.getAppContext(); 那是因为我使用我自己的 Application 类来添加上下文.然后我有一个广播接收器:
NOTE: See that I use MyApplication.getAppContext(); that's because I'm using my own Application class to add the context. And then I have a BroadcastReceiver with this:
public class LocationReceiver extends BroadcastReceiver {
double latitude, longitude;
@Override
public void onReceive(final Context context, final Intent calledIntent)
{
Log.d("LOC_RECEIVER", "Location RECEIVED!");
latitude = calledIntent.getDoubleExtra("latitude", -1);
longitude = calledIntent.getDoubleExtra("longitude", -1);
updateRemote(latitude, longitude);
}
private void updateRemote(final double latitude, final double longitude )
{
//HERE YOU CAN PUT YOUR ASYNCTASK TO UPDATE THE LOCATION ON YOUR SERVER
}
}
应用类:
public class MyApplication extends Application {
private static Context context;
/* (non-Javadoc)
* @see android.app.Application#onCreate()
*/
@Override
public void onCreate() {
MyApplication.context=getApplicationContext();
}
public static Context getAppContext() {
return MyApplication.context;
}
}
同样在您的清单中，您需要同时添加:
Also in your manifest you need to add both:
<application
android:icon="@drawable/icon"
android:label="@string/app_name"
android:name=".MyApplication" >
//YOUR ACTIVITIES HERE...
<service
android:enabled="true"
android:name=".LocationService" >
</service>
<receiver
android:enabled="true"
android:name=".LocationReceiver" >
<intent-filter >
<action android:name="xxx.yyy.intent.action.LOCATION" />
</intent-filter>
</receiver>
</application>
检测服务是否正在运行的方法我在我的第一个活动中执行此操作:
Method to detect if the service is running I do this on my first Activity:
/**
* Check location service.
*/
private void checkLocationService()
{
Log.d("CHECK_SERVICE", "Service running: " + (settings.getBoolean("locationService", false)?"YES":"NO"));
if(settings.getBoolean("locationService", false))
return;
Intent mServiceIntent = new Intent(this, LocationService.class);
startService(mServiceIntent);
}
显然，如果服务正在运行 (onStart) 或未运行 (onDestroy)，您需要控制 SharedPreferences(设置)以将 locationService 变量设置为 true/false.
Obviously you need to control the SharedPreferences (settings) to set the locationService variable to true/false if the service is running (onStart) or not (onDestroy).
这篇关于后台服务需要在服务器上发送 GPS 位置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
