Introduction and examples of how to use the build.prop file.

The build.prop file is a configuration file in the Android system that contains system properties and configuration parameters. This file is typically located in the /system directory and requires root permissions to access and edit. The main purpose of the build.prop file is to modify and customize some properties and behaviors of the device, such as changing the device model, system version information, screen density, enabling/disabling certain features, etc. By editing the build.prop file, users can achieve some system-level customization and optimization. One example of a common build.prop parameter and its usage is ro.build.version.release, which specifies the system version number.

Amendment example: ro.build.version.release=9.02. ro.product.model: Device model.

Edit example: ro.product.model=MyPhone3. ro.build.display.id: Device version identifier displayed

Modify the example: ro.build.display.id=MyPhone-V1.04. ro.sf.lcd_density: screen density (DPI)

Modify example: ro.sf.lcd_density=3205. ro.com.google.clientidbase: Google client ID.

Edit example: ro.com.google.clientidbase=android-abc6. persist.sys.dalvik.vm.lib: Dalvik virtual machine library.

Adjusting the example: persist.sys.dalvik.vm.lib=libart.so requires careful operation as modifying the build.prop file improperly may result in system instability or prevent it from starting up correctly. It is recommended to backup the original build.prop file before making any modifications in case a rollback is needed. Additionally, modifying the build.prop file requires root access, so non-root devices are unable to directly edit this file.