public static void gotoSleepIfDoubleTap(Context context, MotionEvent event) {
if (sDoubleTapAreaRadius == -1) {
sDoubleTapAreaRadius =
context.getResources().getDimensionPixelSize(R.dimen.double_tap_area_radius);
if (DebugLog.DEBUG)
DebugLog.d(TAG, "gotoSleepIfDoubleTap sDoubleTapAreaRadius:" + sDoubleTapAreaRadius);
}
int action = event.getAction();
if (action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) {
if (action == MotionEvent.ACTION_DOWN && sEventCount % 2 != 0) {
sEventCount--;
}
sEventCount++;
}
if (sEventCount == SECOND_DOWN_ACTION) { // second down action
long timeInterval = SystemClock.elapsedRealtime() - mLastClickTime;
boolean isInDoubleTapArea = isDoubleTapDistanceShortEnough(event);
if (timeInterval > DOUBLE_TAP_MAX_TIME || !isInDoubleTapArea) {
sEventCount = 1;
}
}
if (sEventCount == FIRST_DOWN_ACTION) { // first down action
mLastClickTime = SystemClock.elapsedRealtime();
}
if (DebugLog.DEBUG)
DebugLog.d(
TAG,
"gotoSleepIfDoubleTap sEventCount: "
+ sEventCount
+ " interval: "
+ (SystemClock.elapsedRealtime() - mLastClickTime)
+ " preDownX: "
+ mPreTapX);
if (sEventCount % 2 == 0) { // up action
float downX = event.getX();
float downY = event.getY();
if (sEventCount % 4 == 0) { // second up action
long clickTime = SystemClock.elapsedRealtime();
long timeInterval = Math.abs(clickTime - mLastClickTime);
boolean isDoubleTap =
(timeInterval < DOUBLE_TAP_MAX_TIME && timeInterval > DOUBLE_TAP_MIN_TIME);
boolean isDoubleTapDistanceShort = isDoubleTapDistanceShortEnough(event);
if (DebugLog.DEBUG)
DebugLog.d(
TAG,
"isDoubleTap: " + isDoubleTap + " isInDoubleTapArea: " + isDoubleTapDistanceShort);
if (isDoubleTap && isDoubleTapDistanceShort) {
if (DebugLog.DEBUG)
DebugLog.d(
TAG,
"gotoSleepIfDoubleTap() mLastClickTime: "
+ mLastClickTime
+ " clickTime:"
+ clickTime);
PowerManager pw = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
pw.goToSleep(SystemClock.uptimeMillis());
}
mLastClickTime = clickTime;
sEventCount = 0;
}
mPreTapX = downX;
mPreTapY = downY;
}
}
@Override
protected void toggleState() {
PowerManager pm = (PowerManager) mView.getContext().getSystemService(Context.POWER_SERVICE);
pm.goToSleep(SystemClock.uptimeMillis() + 1);
}
private void goToSleep() {
enableKeyguard(true);
mPowerManager.goToSleep(SystemClock.uptimeMillis());
}
private void screenOff() {
PowerManager pm = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
pm.goToSleep(SystemClock.uptimeMillis() + 1);
}
