我有一个在活动中工作的应用程序 - 它从电话接收器调用 GPS 数据并将其发送到我的 php 站点，从 sqlite 过滤线程中的最后一个位置，它看起来像这样
final Handler handler = new Handler();
final Runnable runnable = new Runnable() {
public void run() {
if(indikator != 0)
{
Cursor c=db.rawQuery("select * from lokacije", null);
c.moveToLast();
try{
w.loadUrl(c.getString(c.getColumnIndex("lokacija")));
db.execSQL("delete from lokacije where id <"+c.getString(c.getColumnIndex("id")));
}
catch (Exception e) {
// TODO: handle exception
}
}
indikator=1;
handler.postDelayed(this, 90000);
}
};
//b.setBackgroundColor(Color.RED);
b.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(b.getText().equals("SLOBODAN"))
{
b.setText("ZAUZET");
b.setTextColor(Color.GREEN);
}
else
{
b.setText("SLOBODAN");
b.setTextColor(Color.RED);
}
}
});
//deo koji naknadno ubacujem za kriterijum
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setPowerRequirement(Criteria.POWER_LOW);
//kraj dela koji sam naknadno ubacio
final LocationManager m=(LocationManager) MainActivity.this.getSystemService(Context.LOCATION_SERVICE);
//deo koji sam takodje ubacio naknadno
String locationprovider =m.getBestProvider(criteria,true);
//deo koji sam takodje ubacio naknadno kraj
LocationListener l=new LocationListener() {
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onLocationChanged(Location arg0) {
String url=new String();
String zauzetost=new String();
zauzetost=b.getText().toString();
String format="MM/dd/yyyy";
SimpleDateFormat sdf = new SimpleDateFormat(format,Locale.US);
String date= sdf.format(new Date());
t.setToNow();
ed1.setText("");
ed2.setText("");
String longitude=new String();
String latitude=new String();
String speed=new String();
if((int)arg0.getSpeed()==0)
{
speed="0";
}
else
{
speed=""+(((int)arg0.getSpeed()*3600)/1000);
}
longitude=""+ arg0.getLongitude();
latitude=""+ arg0.getLatitude();
ed1.setText(longitude);
ed2.setText(latitude);
ed3.setText(speed);
Calendar cal=Calendar.getInstance();
url="http://www.compensatemeonline.com/truckmeonline/TruckMeOnline/UnosLokacijaSaTelefona.php?id="+mojsadrzaj+"&longitude="+longitude+"&latitude="+latitude+"&brzina="+speed+"&vreme="+cal.getTime()+"&datum="+date+"&zauzetost="+zauzetost;
db.execSQL("insert into lokacije (lokacija) values ('"+url+"');");
// TODO Auto-generated method stub
}
};
// TODO Auto-generated method stub
//pozivanje threada
runnable.run();
//pozivanje threada
m.requestLocationUpdates(locationprovider, 60000, 0, l);
// zamenio sam m.requestLocationUpdates(LocationManager.GPS_PROVIDER, 120000, 0, l); sa m.requestLocationUpdates(locationprovider, 120000, 0, l);
}
现在我想做的就是把它全部放在一个服务中，这样它就可以在后台运行。我应该将代码放入onCreate()还是放入onStart()方法中，Service因为我还使用了处理程序和另一个线程。当我现在使用 URL 或 HttpClient 调用网站时，因为我无法使用它WebView，Activity所以我的 logcat 中出现了如下错误：
02-12 22:24:32.569: E/AndroidRuntime(1204): java.lang.IllegalStateException: Target host must not be null, or set in parameters. scheme=null, host=null, path=2
02-12 22:24:32.569: E/AndroidRuntime(1204): at org.apache.http.impl.client.DefaultRequestDirector.determineRoute(DefaultRequestDirector.java:591)
02-12 22:24:32.569: E/AndroidRuntime(1204): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:293)
02-12 22:24:32.569: E/AndroidRuntime(1204): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
02-12 22:24:32.569: E/AndroidRuntime(1204): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
02-12 22:24:32.569: E/AndroidRuntime(1204): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
02-12 22:24:32.569: E/AndroidRuntime(1204): at com.example.serviceswithactivity.MyService$1.run(MyService.java:127)
02-12 22:24:32.569: E/AndroidRuntime(1204): at android.os.Handler.handleCallback(Handler.java:725)
02-12 22:24:32.569: E/AndroidRuntime(1204): at android.os.Handler.dispatchMessage(Handler.java:92)
02-12 22:24:32.569: E/AndroidRuntime(1204): at android.os.Looper.loop(Looper.java:137)
02-12 22:24:32.569: E/AndroidRuntime(1204): at android.app.ActivityThread.main(ActivityThread.java:5039)
02-12 22:24:32.569: E/AndroidRuntime(1204): at java.lang.reflect.Method.invokeNative(Native Method)
02-12 22:24:32.569: E/AndroidRuntime(1204): at java.lang.reflect.Method.invoke(Method.java:511)
02-12 22:24:32.569: E/AndroidRuntime(1204): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
02-12 22:24:32.569: E/AndroidRuntime(1204): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
02-12 22:24:32.569: E/AndroidRuntime(1204): at dalvik.system.NativeStart.main(Native Method)
如何从服务中调用 gps 位置，这样我就不会得到 10-15 分，而只能得到一个？我在 Activity 中通过将数据放入 sqlite 数据库中，然后在线程中获取最后一行并删除其他行，以此类推。有没有更好的方法来调用 gps 位置并将其在后台发送到网站？
这是我的全部Service：
public class MyService extends Service {
public int indikator=0;
public String mojsadrzaj=new String();
public String pib=new String();
public String username=new String();
public String password=new String();
public Cursor c;
public Cursor d;
URL myURL;
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
super.onCreate();
Toast.makeText(this,"Service created ...",Toast.LENGTH_LONG).show();
final SQLiteDatabase db=openOrCreateDatabase("TruckMe", MODE_PRIVATE, null);
db.execSQL("create table if not exists lokacije (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, lokacija VARCHAR(600));");
//regulisanje podataka za logovanje samo prvi put
String idvozaca=new String();
db.execSQL("create table if not exists vozac (id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, idvozaca VARCHAR(15));");
d=db.rawQuery("select idvozaca from vozac", null);
//db.execSQL("delete from vozac;");
if(d.getCount() > 0)
{
d.moveToLast();
idvozaca=d.getString(d.getColumnIndex("idvozaca"));
mojsadrzaj=idvozaca;
Toast t=Toast.makeText(this, "Id vozaca je : " + mojsadrzaj, Toast.LENGTH_LONG);
t.setGravity(Gravity.CENTER, 0, 0);
t.show();
}
else
{
//ubacivanje forme za dijalog
//unos vozacid u bazu
db.execSQL("insert into vozac (idvozaca) values ('"+mojsadrzaj+"');");
//unos vozacid u bazu
//String resString = sb.toString(); // Result is here
Toast t=Toast.makeText(this, "Aplikacija je aktivirana sa kodom : "+mojsadrzaj, Toast.LENGTH_LONG);
t.setGravity(Gravity.CENTER, 0, 0);
t.show();
}
//regulisanje podataka za logovanje samo prvi put
final Time t=new Time();
//deo za thread
final Handler handler = new Handler();
final Runnable runnable = new Runnable() {
public void run() {
if(indikator != 0)
{
//w.loadUrl(c.getString(c.getColumnIndex("lokacija")));
final SQLiteDatabase db=openOrCreateDatabase("TruckMe", MODE_PRIVATE, null);
c=db.rawQuery("select * from lokacije", null);
c.moveToLast();
try {
HttpClient client=new DefaultHttpClient();
URI website=new URI(c.getString(c.getColumnIndex("id")));
Log.e("Message", website.toString());
HttpGet request=new HttpGet();
request.setURI(website);
try {
client.execute(request);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (URISyntaxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
/*
URL url = null;
try {
url = new URL(c.getString(c.getColumnIndex("id")));
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
URLConnection urlConnection = null;
try {
urlConnection = url.openConnection();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
urlConnection.connect();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
*/
/*
try {
myURL = new URL(c.getString(c.getColumnIndex("id")));
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
URLConnection myURLConnection = null;
try {
myURLConnection = myURL.openConnection();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
myURLConnection.connect();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
*/
db.execSQL("delete from lokacije where id <"+c.getString(c.getColumnIndex("id")));
// TODO: handle exception
}
indikator=1;
handler.postDelayed(this, 15000);
}
};
//deo koji naknadno ubacujem za kriterijum
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setPowerRequirement(Criteria.POWER_LOW);
//kraj dela koji sam naknadno ubacio
final LocationManager m=(LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
//deo koji sam takodje ubacio naknadno
String locationprovider =m.getBestProvider(criteria,true);
//deo koji sam takodje ubacio naknadno kraj
LocationListener l=new LocationListener() {
@Override
public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onProviderDisabled(String arg0) {
// TODO Auto-generated method stub
}
@Override
public void onLocationChanged(Location arg0) {
String url=new String();
String zauzetost=new String();
zauzetost="ZAUZET";
String format="MM/dd/yyyy";
SimpleDateFormat sdf = new SimpleDateFormat(format,Locale.US);
String date= sdf.format(new Date());
t.setToNow();
String longitude=new String();
String latitude=new String();
String speed=new String();
if((int)arg0.getSpeed()==0)
{
speed="0";
}
else
{
speed=""+(((int)arg0.getSpeed()*3600)/1000);
}
longitude=""+ arg0.getLongitude();
latitude=""+ arg0.getLatitude();
Calendar cal=Calendar.getInstance();
url="http://www.compensatemeonline.com/truckmeonline/TruckMeOnline/UnosLokacijaSaTelefona.php?id="+mojsadrzaj+"&longitude="+longitude+"&latitude="+latitude+"&brzina="+speed+"&vreme="+cal.getTime()+"&datum="+date+"&zauzetost="+zauzetost;
Toast.makeText(MyService.this, url,Toast.LENGTH_LONG).show();
db.execSQL("insert into lokacije (lokacija) values ('"+url+"');");
// TODO Auto-generated method stub
}
};
// TODO Auto-generated method stub
//pozivanje threada
runnable.run();
//pozivanje threada
m.requestLocationUpdates(locationprovider, 10000, 0, l);
// zamenio sam m.requestLocationUpdates(LocationManager.GPS_PROVIDER, 120000, 0, l); sa m.requestLocationUpdates(locationprovider, 120000, 0, l);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "Service started onstartcommand ...",Toast.LENGTH_LONG).show();
return START_STICKY;
}
@Override
public void onStart(Intent intent, int startId) {
Toast.makeText(this, "Service started onstart...",Toast.LENGTH_LONG).show();
}
@Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(this, "Service destroyed ...",Toast.LENGTH_LONG).show();
}
}