查询SystemFeature的方法可以在adb shell下敲如下的命令：
dumpsys package
然后搜feature关键字。
例如，我的平台的SystemFeature,如下所示：
Features:
android.hardware.faketouch
android.hardware.wifi
android.hardware.camera
android.hardware.wifi.direct
android.hardware.usb.accessory
android.hardware.microphone
android.hardware.usb.host
android.hardware.camera.autofocus
android.software.live_wallpaper
android.hardware.touchscreen
android.hardware.screen.portrait
android.hardware.camera.flash
没有mHasDistinctMultitouch=context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT);
的”android.hardware.touchscreen.multitouch.distinct”这一项。
如果有这一项的会导致如下的判断不执行：
public void onCodeInput(intprimaryCode, int[] keyCodes, int x, int y) {
caseKeyboard.CODE_SWITCH_ALPHA_SYMBOL:
// Symbol key is handled in onPress()when device has distinct multi-touch panel.
Log.v("onKeyDown","---------changeKeyboardMode-------11------------"+distinctMultiTouch);
if (!distinctMultiTouch) {
Log.v("onKeyDown","---------changeKeyboardMode-------12------------");
switcher.changeKeyboardMode();
}
这样就会导致遥控器去操控的时候，出现很多的问题。