我承认我对 android 比较陌生，我来自 python 和 C++。帮助将不胜感激。我只是从广播接收器 onReceive 调用位置更新，这样我就可以给我的设备发短信并接收它的位置，在那个时刻更新。
我发现我可以调用位置来发送文本，但它不会更新位置，它只是给出最后一次知道的。如果我两次调用 requestLocationUpdates，它似乎使用设备上的 GPS 图标进行定位，但是对 requestLocationUpdates 的第二次调用不使用更新的位置，它使用的是旧位置。如果我不调用 requestLocationUpdates 两次，它甚至不会更新（并且没有 GPS 图标闪烁确认这一点。）这是我的代码，对 requestLocationUpdates 的第一个冗余调用被注释掉了。
我知道代码不是很漂亮（就像 Thread.sleep 一样，我打算在更新工作后将其删除。请原谅那些临时位。有人可以帮助我吗，代码应该在逻辑上做我想要的，但是逻辑似乎不适用于这个..：
package com.JT.appNew01;
import java.util.ArrayList;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.telephony.SmsManager;
import android.telephony.gsm.SmsMessage;
import android.widget.Toast;
import android.location.GpsStatus;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.Geocoder;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
public class SmsReceiverXxx extends BroadcastReceiver{
public static final String COMMAND = "SENDER";
public static final int SENDER_ACT_DOCUMENT = 0;
public static final int SENDER_SRV_POSITIONING = 1;
public static final int MIN_TIME_REQUEST = 5 * 1000;
public static final String ACTION_REFRESH_SCHEDULE_ALARM =
"com.JT.appNew01.ACTION_REFRESH_SCHEDULE_ALARM";
private static Location currentLocation;//was private static
private static Location prevLocation;//was private static
private static Context _context;
private String provider = LocationManager.GPS_PROVIDER;
private static Intent _intent;
private static LocationManager locationManager;//was private static
//I ADDED FOR FIRST PASS THE FOLLOWING:
private LocationListener locList=new LocationListener(){
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
try {
gotLocation(location);
} catch (Exception e) {
}
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
try {
String strStatus = "";
switch (status) {
case GpsStatus.GPS_EVENT_FIRST_FIX:
strStatus = "GPS_EVENT_FIRST_FIX";
break;
case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
strStatus = "GPS_EVENT_SATELLITE_STATUS";
break;
case GpsStatus.GPS_EVENT_STARTED:
strStatus = "GPS_EVENT_STARTED";
break;
case GpsStatus.GPS_EVENT_STOPPED:
strStatus = "GPS_EVENT_STOPPED";
break;
default:
strStatus = String.valueOf(status);
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
};// I ADDED THIS TO GO WITH FIRST PASS!!!!!
private static LocationListener locationListener = new LocationListener(){//was private static
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
try {
String strStatus = "";
switch (status) {
case GpsStatus.GPS_EVENT_FIRST_FIX:
strStatus = "GPS_EVENT_FIRST_FIX";
break;
case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
strStatus = "GPS_EVENT_SATELLITE_STATUS";
break;
case GpsStatus.GPS_EVENT_STARTED:
strStatus = "GPS_EVENT_STARTED";
break;
case GpsStatus.GPS_EVENT_STOPPED:
strStatus = "GPS_EVENT_STOPPED";
break;
default:
strStatus = String.valueOf(status);
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onLocationChanged(Location location) {
try {
gotLocation(location);
} catch (Exception e) {
}
}
};
@Override
public void onReceive(final Context context, Intent intent)
{
SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(context);
String valuephn=sharedPrefs.getString("welcome_message", "NULL");
int zz = 0;
int MAX_SMS_MESSAGE_LENGTH = 160;
Bundle bundle = intent.getExtras();
SmsMessage[] msgs = null;
String str = "";
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
if (bundle != null)
{
try {
for (int i=0; i<msgs.length; i++){
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
str += "Map Trax - Location: " + msgs[i].getOriginatingAddress();
str += " :";
str += msgs[i].getMessageBody().toString();
str += "\n";
zz=i;
}
} catch (Exception e){
e=e;
}
SmsManager sms = SmsManager.getDefault();
PendingIntent pendingIntent = null;
//String xyzx = msgs[zz].getOriginatingAddress();
String xyzx="a"; // TEMPORARY FOR SKYPE!!! USE LINE ABOVE!!!
// FIRST PASS TRY TO GET COORDS:
//try{
// //if ( xyzx.contains(valuephn) ) {
// if ( xyzx.contains("a") ) { // TEMPORARY FOR SKYPE!!! USE LINE ABOVE!!!
// _context = context;
// _intent = intent;
// locationManager = (LocationManager) context
// .getSystemService(Context.LOCATION_SERVICE);
// if (locationManager.isProviderEnabled(provider)) {
// locationManager.requestLocationUpdates(provider, MIN_TIME_REQUEST,
// 5, locList);
//
// Location gotLoc = locationManager.getLastKnownLocation(provider);
// gotLocation(gotLoc);
// pauseOne();
// pauseTwo();
// pauseThree();
// pauseFour();
// pauseFive();
// pauseOne();
// pauseTwo();
// pauseThree();
// pauseFour();
// pauseFive();
// pauseOne();
// pauseTwo();
// pauseThree();
// pauseFour();
// pauseFive();
// OnNewLocationReceived(gotLoc);//JUST ADDED!!!
// stopLocationListener();//JUST ADDED!!!
//
//
// } else {
// Location gotLoc2 = locationManager.getLastKnownLocation(provider);
// pauseOne();
// pauseTwo();
// pauseThree();
// pauseFour();
// pauseFive();
// pauseOne();
// pauseTwo();
// pauseThree();
// pauseFour();
// pauseFive();
// pauseOne();
// pauseTwo();
// pauseThree();
// pauseFour();
// pauseFive();
// OnNewLocationReceived(gotLoc2);//JUST ADDED!!!
// stopLocationListener();//JUST ADDED!!!
// }
// }}catch(Exception zzz){}
// END FIRST PASS.
try{
//if ( xyzx.contains(valuephn) ) {
if ( xyzx.contains("a") ) { // TEMPORARY FOR SKYPE!!! USE LINE ABOVE!!!
_context = context;
_intent = intent;
locationManager = (LocationManager) context
.getSystemService(Context.LOCATION_SERVICE);
if (locationManager.isProviderEnabled(provider)) {
locationManager.requestLocationUpdates(provider, MIN_TIME_REQUEST,
5, locationListener);
Location gotLoc = locationManager.getLastKnownLocation(provider);
gotLocation(gotLoc);
pauseOne();
pauseTwo();
pauseThree();
pauseFour();
pauseFive();
pauseOne();
pauseTwo();
pauseThree();
pauseFour();
pauseFive();
pauseOne();
pauseTwo();
pauseThree();
pauseFour();
pauseFive();
OnNewLocationReceived(gotLoc);//JUST ADDED!!!
stopLocationListener();//JUST ADDED!!!
} else {
Location gotLoc2 = locationManager.getLastKnownLocation(provider);
pauseOne();
pauseTwo();
pauseThree();
pauseFour();
pauseFive();
pauseOne();
pauseTwo();
pauseThree();
pauseFour();
pauseFive();
pauseOne();
pauseTwo();
pauseThree();
pauseFour();
pauseFive();
OnNewLocationReceived(gotLoc2);//JUST ADDED!!!
stopLocationListener();//JUST ADDED!!!
}
//sms.sendTextMessage(valuephn,"", "Map Trax - GPS Co-ordinates:"+locationStringFromLocation(null).toString()+" - Map: http://maps.google.com/?q="+locationStringFromLocation(null).toString(),pendingIntent,pendingIntent);
Toast.makeText(context, "1: "+locationStringFromLocation(null).toString(), Toast.LENGTH_SHORT).show();
locationManager.removeUpdates(locationListener);
}
}catch(Exception zzz){
try{
if ( xyzx.contains("a") ) {
//sms.sendTextMessage(valuephn,"", "Map Trax - GPS Co-ordinates:"+locationStringFromLocation2(null).toString()+" - Map: http://maps.google.com/?q="+locationStringFromLocation2(null).toString(),pendingIntent,pendingIntent);
Toast.makeText(context, "2: "+locationStringFromLocation2(null).toString(), Toast.LENGTH_SHORT).show();
locationManager.removeUpdates(locationListener);
}
}catch(Exception zzzz){
//sms.sendTextMessage(valuephn,"","Location currently unavailable",pendingIntent,pendingIntent);
Toast.makeText(context, "Location currently unavailable", Toast.LENGTH_SHORT).show();
locationManager.removeUpdates(locationListener);
}
}
};
}
private void pauseFive() {
// TODO Auto-generated method stub
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void pauseFour() {
// TODO Auto-generated method stub
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void pauseThree() {
// TODO Auto-generated method stub
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void pauseTwo() {
// TODO Auto-generated method stub
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void pauseOne() {
// TODO Auto-generated method stub
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static String locationStringFromLocation(final Location location) {//was public static
return String.format("%.3f,%.3f", currentLocation.getLatitude(), currentLocation.getLongitude());
}
public static String locationStringFromLocation2(final Location location) {//was public static
return String.format("%.3f,%.3f", prevLocation.getLatitude(), prevLocation.getLongitude());
}
private static void gotLocation(Location location) {//was public static
prevLocation = currentLocation == null ?
null : new Location(currentLocation);
currentLocation = location;
if (isLocationNew()) {
OnNewLocationReceived(location);
//Toast.makeText(_context, "new location saved", Toast.LENGTH_SHORT)
// .show();
stopLocationListener();
}
}
private static boolean isLocationNew() {//was public static
if (currentLocation == null) {
return false;
} else if (prevLocation == null) {
return true;
} else if (currentLocation.getTime() == prevLocation.getTime()) {
return false;
} else {
return true;
}
}
public static void stopLocationListener() {//was public static
locationManager.removeUpdates(locationListener);
}
static ArrayList<OnNewLocationListener> arrOnNewLocationListener =
new ArrayList<OnNewLocationListener>();
public static void setOnNewLocationListener(
OnNewLocationListener listener) {
arrOnNewLocationListener.add(listener);
}
public static void clearOnNewLocationListener(
OnNewLocationListener listener) {
arrOnNewLocationListener.remove(listener);
}
// This function is called after the new point received
private static void OnNewLocationReceived(Location location) {
// Check if the Listener was set, otherwise we'll get an Exception when
// we try to call it
if (arrOnNewLocationListener != null) {
// Only trigger the event, when we have any listener
for (int i = arrOnNewLocationListener.size() - 1; i >= 0; i--) {
arrOnNewLocationListener.get(i).onNewLocationReceived(
location);
}
}
}
}