android4.0 is resolved differently from TP in version 2.3

Generally speaking, when debugging TP on android2.3, you only need to tune the linux driver and android will work normally. However, es5EN 4.0 is a little different. For linux drivers, we need to add the following contents:

1. Call the following function to report Key Down when the finger is pressed:

input_report_key(struct input_dev *input, BTN_TOUCH, 1);

2. Call the following function to report Key Up when the finger is released:

input_report_key(struct input_dev *input, BTN_TOUCH, 0);

By this way, can be in android4. 0 see the mouse pointer (circle) can be moved on, the touch screen to make the mouse on the laptop computer touch screen, then check again, need to add 1 idc original documents, specific to identify priority reference: http: / / source android. com tech/input/input - device - configuration - files. html this document, will identify the configuration files in the following order:

/system/usr/idc/Vendor_XXXX_Product_XXXX_Version_XXXX.idc
/system/usr/idc/Vendor_XXXX_Product_XXXX.idc
/system/usr/idc/DEVICE_NAME.idc
/data/system/devices/idc/Vendor_XXXX_Product_XXXX_Version_XXXX.idc
/data/system/devices/idc/Vendor_XXXX_Product_XXXX.idc
/data/system/devices/idc/DEVICE_NAME.idc

For convenience, I directly created a "device name.idc" file and put it in /system/usr/idc/ directory. The corresponding contents are as follows:

# Basic Parameters
touch.deviceType = touchScreen
touch.orientationAware = 1

# Size
touch.size.calibration = diameter
touch.size.scale = 10
touch.size.bias = 0
touch.size.isSummed = 0

# Pressure
# Driver reports signal strength as pressure.
#
# A normal thumb touch typically registers about 200 signal strength
# units although we don't expect these values to be accurate.
touch.pressure.calibration = amplitude
touch.pressure.scale = 0.005

# Orientation
touch.orientation.calibration = none

Once configured, TP on android4.0 works without becoming a mouse touch screen.