点击空白处，软键盘消失

/**
* 点击空白处，软键盘消失
*/
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (needCloseInputWhenTouchSpace() && ev.getAction() == MotionEvent.ACTION_DOWN) {
View v = getCurrentFocus();
if (InputMethodUtils.isShouldHideInput(v, ev)) {
InputMethodUtils.forceHideInputMethod(v, this);
}
}
return super.dispatchTouchEvent(ev);
}