java hasfocus_Java KeyEvent.hasNoModifiers方法代碼示例
import android.view.KeyEvent; //導(dǎo)入方法依賴的package包/類
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// We need to handle focus change within the SimpleMonthView because we are simulating
// multiple Views. The arrow keys will move between days until there is no space (no
// day to the left, top, right, or bottom). Focus forward and back jumps out of the
// SimpleMonthView, skipping over other SimpleMonthViews in the parent ViewPager
// to the next focusable View in the hierarchy.
boolean focusChanged = false;
switch (event.getKeyCode()) {
case KeyEvent.KEYCODE_DPAD_LEFT:
if (event.hasNoModifiers()) {
focusChanged = moveOneDay(isLayoutRtl());
}
break;
case KeyEvent.KEYCODE_DPAD_RIGHT:
if (event.hasNoModifiers()) {
focusChanged = moveOneDay(!isLayoutRtl());
}
break;
case KeyEvent.KEYCODE_DPAD_UP:
if (event.hasNoModifiers()) {
ensureFocusedDay();
if (mHighlightedDay > 7) {
mHighlightedDay -= 7;
focusChanged = true;
}
}
break;
case KeyEvent.KEYCODE_DPAD_DOWN:
if (event.hasNoModifiers()) {
ensureFocusedDay();
if (mHighlightedDay <= mDaysInMonth - 7) {
mHighlightedDay += 7;
focusChanged = true;
}
}
break;
case KeyEvent.KEYCODE_DPAD_CENTER:
case KeyEvent.KEYCODE_ENTER:
if (mHighlightedDay != -1) {
onDayClicked(mHighlightedDay);
return true;
}
break;
case KeyEvent.KEYCODE_TAB: {
int focusChangeDirection = 0;
if (event.hasNoModifiers()) {
focusChangeDirection = View.FOCUS_FORWARD;
} else if (event.hasModifiers(KeyEvent.META_SHIFT_ON)) {
focusChangeDirection = View.FOCUS_BACKWARD;
}
if (focusChangeDirection != 0) {
final ViewParent parent = getParent();
// move out of the ViewPager next/previous
View nextFocus = this;
do {
nextFocus = nextFocus.focusSearch(focusChangeDirection);
} while (nextFocus != null && nextFocus != this &&
nextFocus.getParent() == parent);
if (nextFocus != null) {
nextFocus.requestFocus();
return true;
}
}
break;
}
}
if (focusChanged) {
invalidate();
return true;
} else {
return super.onKeyDown(keyCode, event);
}
}
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