Device overlays

Device specific overlay values

How to configure overlay values to enable device specific features This values must be placed in the overlay folder of the device tree

e.g. https://github.com/omnirom/android_device_oppo_find5/tree/android-4.4/overlay

LEDS

Enable

If the device has a LED

Notifications

Enable usage of LED for notification

frameworks/base - config.xml

   <bool name="config_intrusiveNotificationLed">true</bool>

Charging

Enable charging LED

frameworks/base - config.xml

   <bool name="config_intrusiveBatteryLed">true</bool>

If the LED has more then one color

   <bool name="config_multiColorBatteryLed">true</bool>

Colors

OmniGears - config.xml

If device supports RGB colors on LEDs

   <bool name="config_has_multi_color_led" translatable="false">true</bool>

Else a list of supported colors can be provided the default is red/green

OmniGears - arrays.xml

   <string-array name="entries_led_colors" translatable="false">
       <item>@string/led_color_green</item>
       <item>@string/led_color_red</item>
   </string-array>

   <string-array name="values_led_colors" translatable="false">
       <item>#FF00FF00</item>
       <item>#FFFF0000</item>
   </string-array>

Buttons and Keys

Config

Define the number of buttons available on the device

frameworks/base - config.xml

   <integer name="config_deviceHardwareKeys">7</integer>

Enable custom button config in Settings

OmniGears - config.xml

   <bool name="config_has_hardware_buttons">true</bool>

If kernel has volume wake support

   <bool name="config_show_volumeRockerWake">true</bool>
   

Backlight

If the device has capacitive buttons with backlight that should be handled separate of the screen brightness.

Enable support of custom button backlight

frameworks/base - config.xml

   <bool name="config_button_brightness_support">true</bool>

Define the default button brightness values for automatic brightness

   <integer-array name="config_autoBrightnessButtonBacklightValues">
       <item>14</item>   
       <item>28</item>   
       <item>37</item>   
       <item>51</item>   
       <item>71</item>   
       <item>80</item>   
       <item>96</item>   
       <item>108</item>  
       <item>144</item>  
       <item>181</item>  
       <item>255</item>  
   </integer-array>

This also requires support of setting button backlight separate in liblights