[Q] Widget Working without Permissions..Possible ?? - Android Q&A, Help & Troubleshooting

Hi,
I am having a HTC One X running ProBAM ROM and XM Kernel. It has FastCharge feature by which the phone can charge as if it is connected to AC mains even if it is plugged into Laptop.
For this to be enabled, the value '1' has to be written to the following file
/sys/devices/platform/htc_battery/fast_charge
Wrote a small widget to do that job for me. And its working fine
My question is .... I haven't added any permissions in the Manifest file, and also the widget is not asking for any Root request when i use it.... Shoudn't the widget give error since no write permission is available in the manifest and shouldnt it ask for Root access since it is trying to write to a system partition?
Another small help, I have attached the Eclipse project folder of that widget also. If its possible, can any one look into the code and give their comments about the code. I have just started as a developer so the code might not be a standard one or a efficient one. Need suggestions to make it more standard and efficient. Thanks again

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Looked at your code and I think it'd be easier if you did something like this.
First you might want to do this to gain root access.
Code:
Process p = Runtime.getRuntime().exec("su") ;
To enable fast charge:
Code:
Process p = Runtime.getRuntime().exec("echo 1 > /sys/kernel/fast_charge/force_fast_charge") ;
To disable fast charge:
Code:
Process p = Runtime.getRuntime().exec("echo 0 > /sys/kernel/fast_charge/force_fast_charge") ;
I'm not too sure though, I haven't required root for my apps.
If this doesn't work I recommend you take a look here
Sent from my Galaxy Nexus using Tapatalk 2

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Hi Jimlarlarck,
Thanks a lot for the quick reply. The issue is that the code that i have attached is WORKING. I havent added any permission in the Manifest and AFAIK the method I am using should not work on system folders/files rite?? But it is working. So is there any issue with the ROM I am using ?? Thats my confussion
And it would be great if you could give some comments on the code, like , how efficient it is...any loopholes present..or any mistakes preset.
Thanks a Lot

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Maybe the ROM you're using have different permissions on the sys folder, try your widget on other ROM if possible.

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keertikumar_ws said:
Hi Jimlarlarck,
Thanks a lot for the quick reply. The issue is that the code that i have attached is WORKING. I havent added any permission in the Manifest and AFAIK the method I am using should not work on system folders/files rite?? But it is working. So is there any issue with the ROM I am using ?? Thats my confussion
And it would be great if you could give some comments on the code, like , how efficient it is...any loopholes present..or any mistakes preset.
Thanks a Lot
Click to expand...
Click to collapse
Not quite, you don't really need any permissions besides Root, which isn't needed to be added to the manifest is it enabling fast charge?
Your code seemed neat and brief though, easy and pleasant to read, make it a bit neater and spaced out though, remember, in Java, spaces don't matter, and the program is only as good as the developer's understanding of their own code.
Sent from my Galaxy Nexus using Tapatalk 2

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Kool so can i take that root permission and manifest are completely unrelated... ?? Am I rite??
this gives rise to a different doubt though since my phone is rooted...and have superuser filter.. and I do get prompts for any new app that needs root permission.... so shouldn't my widget also make the superuser filter prompt for access??? :-\ I am confused all about this root, SU and permissions stuff
And thanks a lot for ur coments... will follow them
Sent from my ProBam by codexc @xda using xda app-developers app

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Sorry forgot to reply in the previous post.... Yup....it is enabling fast charge
Sent from my ProBam by codexc @xda using xda app-developers app

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keertikumar_ws said:
Sorry forgot to reply in the previous post.... Yup....it is enabling fast charge
Sent from my ProBam by codexc @xda using xda app-developers app
Click to expand...
Click to collapse
Probably your ROM configurations, have you tried using it with a different ROM?
Sent from my Galaxy Nexus using Tapatalk 2

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Jimlarck said:
Probably your ROM configurations, have you tried using it with a different ROM?
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
yet to try it...will try and report back soon