詳細內容轉貼:http://www.kandroid.org/android_pdk/keymaps_keyboard_input.html Key layout maps are installed in /system/usr/keylayout and /data/usr/keylayout. Key layout maps are stored on the device as UTF-8 text files and have the following
Guess Android SystemClock keeps system timer and rtc count sync. power on reset -> reserve rtc power onlycommand reboot (system software reset) -> reserve PM, RSC, RTC, GPIO For keep time for situations as sleep/wakeup, command reboot, power
screen coordinate(Xs) VS device coordinate(Xd)screen coordinate is related to screen rotation, which could be change after orietation. But device coordinate is fixed, left up is original point. Xs= Xd*A+Yd*B+CYs= Yd*D+Yd*E+F Calibrate math is aiming
What's G-sensor?An g-sensor (or accelerometer) is a device that measures proper acceleration, the acceleration experienced relative to freefall.Single- and multi-axis models are available to detect magnitude and direction of the acceleration as a
Android 4.0(ICS) merge handset and tablet UI together, make customer flexible to use which UI they want. On marketing nowdays, phone use phone mode directly and other product like tablet/MID/PND use tablet mode.ICS support multi-panel in tablet mode