How to implement/debug a sensor driver in ANDROID - android

Does anyone know of a walk-through or any examples of any code to setup sensors in android.
I have the drivers available to me.
Also i have implemented the sensors library as instructed
in the Android-Reference along the sensors.h template.
I am still unable to get any response at the apps level.
How do i trace this issue? what might be the problem?
Thanks in advance
UPDATE:
Jorgesys's link below points to a great APP to test if the sensor drivers are functioning properly or not.
Now that i know they are not functioning, Any ideas of on where to dig??...

This is a cool example.
You can check out this project too!
Sensor Simulator
And the simulation of this project here.

Found everything needed to get started developing Android sensor apps.

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I'm trying to develop own Android application using ANT+ sensors.
My app is based on (developer's Sampler code and SDK).
However I found the strange thing during tests. I mean when I start to searching devices I immediately receive a message:
W/AntPluginPcc: BBD30600: RequestAccess failed: OTHER_FAILURE
At first I suppose that a reason of this problem is that I have a phone with Marshmallow OS (instead my wife's phone is based on Lollipop OS and all works fine). I tried to find anything in documentation related this but didn't find anything interesting. I add to Manifest some permissions (I mean com.dsi.ant.permission.ANT, android.permission.BLUETOOTH etc.) and set the permissions in code, but it doesn't help to me to solve my issue.
May be anybody received this problem and may be somebody solve it. Could you please share your solution to me?
P.S. I install the ANT+ Plugin services, ANT Radio Service. in App I use the ANT+ SDK from github. May be I should use also the ANT SDK? (I want to connect to HRM and cycle devices which use ANT+ protocol)
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Is there a minimal set of source code to help people get started. Just enough to get started.
Ti does supply the Source Code there are hundreds and hundreds of files to make a professional demo. This is no use to a beginner trying to figure out how to use this sensor with his android.
The software can be found at http://www.ti.com/tool/sensortag-sw#Technical Documents. You need to sign in to download and execute an installer.
I think you'll find this example project quite useful:
https://play.google.com/store/apps/details?id=sample.ble.sensortag&hl=en
Source code available here:
https://github.com/StevenRudenko/BleSensorTag
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