[Question] GPS

XverhelstX · Mar 22, 2011

Hey everyone!

I have (yet) another question.

I read somewhere that it is not possible to enable the GPS programmatically, but I searched some apps around the market and apparently, Lookout can do this:

https://market.android.com/details?id=com.lookout&feature=search_result

FIND MY PHONE

...
* Lookout can remotely enable GPS, so you can find your phone even if GPS is turned off
...

So now I guess it's possible?

Thanks a lot!

XverhelstX

Erel · Mar 23, 2011

There is no official way to turn on the GPS.
It seems that someone at the XDA forums has indeed found a way to do it using a bug in the system.
Such solutions are usually not unreliable.

XverhelstX · Mar 23, 2011

Ok thanks Erel.

Though I searched on google and on XDA and it's true that there is some kind of bug in the power manager widget.

So is it possible to get this work for basic4android, cause it doesn't sound legal i guess.

see code for here:

android - Enable GPS programatically like Tasker - Stack Overflow

Thanks!

XverhelstX

http://code.google.com/p/android/issues/detail?id=7890

Erel · Mar 24, 2011

I don't see any legal problems here. Just that it is a problematic solution which is likely to fail in the future.
You can try building your own library. It shouldn't be too difficult.
http://www.b4x.com/forum/additional...es/6810-creating-libraries-basic4android.html

XverhelstX · Mar 24, 2011

pff, actually, I really don't get it.

something like this then?

B4X:

import android.content.ContentResolver;
import android.content.Intent;
import android.net.Uri;
import android.provider.Settings;
import anywheresoftware.b4a.BA.Events;
import anywheresoftware.b4a.BA.Permissions;
import anywheresoftware.b4a.BA.ShortName;
import anywheresoftware.b4a.BA.Version;

/**
 * 
 */
@ShortName("TurnGPS")
@Permissions(values={"android.permission.ACCESS_FINE_LOCATION"})
@Events(values={"TurnGPSOn (Enabled As Boolean)", "TurnGPSOff (Enabled As Boolean)" })
@Version(1f)

public class TurnGPS {
   
   private static void turnGPSOn(){
       String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);

       if(!provider.contains("gps")){
           final Intent poke = new Intent();
           poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider"); 
           poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
           poke.setData(Uri.parse("3")); 
           sendBroadcast(poke);
       }
   }


   private static void turnGPSOff(){
       String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);

       if(provider.contains("gps")){
           final Intent poke = new Intent();
           poke.setClassName("com.android.settings", "com.android.settings.widget.SettingsAppWidgetProvider");
           poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
           poke.setData(Uri.parse("3")); 
           sendBroadcast(poke);
       }
   }


}

that seems to work, but I need to create methods then for sendBroadcast and getContentResolver, but I really don't have a clue what to do then next.
and also how to get the TurnGPSon then let to work.

XverhelstX

agraham · Mar 24, 2011

As far as I can see you don't need anything other than the turnGPSOn and turnGpsOff methods. The method in your second link to the Android Issue posting seems to be doing the same as the StackOverflow code.

You don't need the @Events annotation. turnGPSOn and turnGpsOff don't raise any events. You could however add an @Author("My Name") annotation.

If you can get the code you posted compiled and exported as a jar with the matching xml file using the B4ADoclet it might just work - until the bug is fixed of course!

XverhelstX · Mar 24, 2011

yes ok thanks, but what will I have to do with the:

- SendBroadcast(poke) and getContentResolver() cause those are methods (i think)

?

xverhelstx

agraham · Mar 24, 2011

SendBroadcast and getContentResolver are Context class methds and so you need a Context or Activity object on which to invoke them. Basic4Android can give you one.

B4X:

Private BA ba
....
Public void Initialize(BA ba)
{
  this.ba = ba;
}

....
-----getString(ba.context.getContentResolver()------
...
ba.context.sendBroadcast(poke);

I haven't fully checked this but I got to rush and cook our evening meal

agraham · Mar 24, 2011

In a hurry I missed that you should also annotate your class @ActivityObject as it saves a context reference in the BA.

XverhelstX · Mar 24, 2011

I don't get it.

So I have to make a new class named GPS.java(for example)

public class GPS

Private BA ba

Public void Initialize(BA ba)
{
this.ba = ba;
}
}

or where do I have to put this?

and what do i have to include with @ActivityObject?

thank you

xverhelstx

agraham · Mar 24, 2011

Have you carefully read creating libraries? It explains BA and @ActivityObject

XverhelstX · Mar 25, 2011

Oh now I understand it almost completely

I made my .jar and .xml and all, but I still encouter an error when compiling:

B4X:

Compiling generated Java code.          Error
B4A line: 119
End Sub
javac 1.6.0_21
src\xtremelyvirtualstudios\xvs\Tracked\main.java:257: cannot find symbol
symbol  : class TurnGPS
location: class xtremelyvirtualstudios.xvs.Tracked.main
TurnGPS _turnon = null;
^
1 error

B4X:

import android.content.Intent;
import android.net.Uri;
import anywheresoftware.b4a.BA;
import anywheresoftware.b4a.BA.Author;
import anywheresoftware.b4a.BA.ActivityObject;
import anywheresoftware.b4a.BA.Permissions;
import anywheresoftware.b4a.BA.ShortName;
import anywheresoftware.b4a.BA.Version;

/**
 * 
 */
@ShortName("TurnGPS")
@Permissions(values={"android.permission.WRITE_SECURE_SETTINGS"})
@ActivityObject
@Author("XverhelstX")
@Version(1f)


public class TurnGPS{
   
   private BA ba; 
   
   public void Initialize(BA ba)
   {
     this.ba = ba;
     
   }
    /**
     * Toggles the GPS. Note that this method actually activate the GPS immediately (unlike most other methods that
     *goes to the Settings Screen.).
     */
   public void turnGPS(){
       final Intent poke = new Intent();
       poke.setClassName("com.android.settings","com.android.settings.widget.SettingsAppWidgetProvider"); //$NON-NLS-1$//$NON-NLS-2$
       poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
       poke.setData(Uri.parse("3")); //$NON-NLS-1$
       ba.context.sendBroadcast(poke);
   }

}

Thanks!

XverhelstX

EDIT; the problem on the prev page was that Private was with a capital letter.

agraham · Mar 25, 2011

I'm not sure I understand your last post Have you got it working now or not?

XverhelstX · Mar 25, 2011

Nope sorry ;p my "Thanks" was misleading :s.

So I haven't solved this problem yet and I still receive this error

Compiling generated Java code. Error
B4A line: 119
End Sub
javac 1.6.0_21
src\xtremelyvirtualstudios\xvs\Tracked\main.java:257: cannot find symbol
symbol : class TurnGPS
location: class xtremelyvirtualstudios.xvs.Tracked.main
TurnGPS _turnon = null;
^
1 error

when i try to compile.

I also tried to make a new one (another one, and I have the same error).

:S

XverhelstX

agraham · Mar 25, 2011

The Java code looks OK and the xml looks like it satisfies the Basic4android compiler. Post the code of the Sub that is failing, together with the jar and xml if you want and I'll see if I can find what is wrong.

XverhelstX · Mar 25, 2011

Ok, thanks.

B4X:

Sub btnGPSOn_click
Dim TurnOn As TurnGPS

TurnOn.turnGPS()
End Sub

Note that I make the .jar with file - export - jar file (I think that is the right way)

XverhelstX

agraham · Mar 25, 2011

OK, your jar and xml files match but are for the wrong project. They both contain an AudioRecorder object so no wonder TurnGPS is not found. I suspect that you had the wrong source tree selected when you exported the jar and generated the xml. It's easily done in Eclipse.

XverhelstX · Mar 25, 2011

oh, I don't think the problem is related to that.

because, while I was waiting, i accendently made this XML above the Audiorecorder one. but I already had the error before i did it.

I will retry.

Also note that I'm on Safe modus, because my pc is behaving very strange.

XverhelstX

XverhelstX · Mar 25, 2011

Nope, I still have the error with the correct xml and jar.

XverhelsTX

XverhelstX · Mar 25, 2011

Ow man, you have to be kiddin' me :s

My pc is is extremely slow, and hard did a hard reset when my project was open.
Now I got an error and my file won't open anymore and it has 0 kb :s

Any help?

XverhelstX

[Question] GPS

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