Android Application Accessing Hardware Resources

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DART-MX8M Android Oreo Accessing Hardware via Android Application

Android Application Access

By default Android Application can't access the hardware directly as per design.
All the hardware access either have to be via Android services or via the HAL layers.

There are multiple ways to access the hardware like GPIOs / UART/ SPI / I2C/CAN
However, if you still want to access you can do so by making Selinux in permissive mode or modifying the

SELinux policies
make your application system app.

See: https://devarea.com/aosp-creating-a-systemapplication/#.XxaL2ShKiUk

Select the interface you are trying to access via Application and clone projects in the Android Studio.

UART

The project you can take as a reference: https://github.com/chzhong/serial-android

SPI

The project you can take as a reference: https://github.com/rrandyzh/android-jni-spi

GPIO

The project you can take as a reference: https://github.com/synportack24/GPIO

I2C

The project you can take as a reference: https://github.com/synportack24/GPIO/blob/master/app/src/main/jni/i2c_fragment.c

CAN

The project you can take as a reference: https://github.com/entropia/libsocket-can-java
Please refer to README.md for making an application.

Tips/Questions/More Details

You can either use the setenforce 0 or have your own sepolicies written, for that refer to SeLinux
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