進入Actvity的
public boolean dispatchTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
onUserInteraction();
}
if (getWindow().superDispatchTouchEvent(ev)) {
return true;
}
return onTouchEvent(ev);
}
可以看到會直接調用
public boolean onTouchEvent(MotionEvent event) {
if (mWindow.shouldCloseOnTouch(this, event)) {
finish();
return true;
}
return false;
}
而Activity中的TouchEvent，如果窗口關閉就返回true傻挂，自己消費事件患久，一般情況下return false;
分發(fā)到一下層級的dispatchTouchEvent();
ViewGroup中的dispatchTouchEvent();
首先會做攔截判斷荞胡，看ViewGroup是否攔截
final boolean intercepted;
if (actionMasked == MotionEvent.ACTION_DOWN
|| mFirstTouchTarget != null) {
final boolean disallowIntercept = (mGroupFlags & FLAG_DISALLOW_INTERCEPT) != 0;
if (!disallowIntercept) {
intercepted = onInterceptTouchEvent(ev);
ev.setAction(action); // restore action in case it was changed
} else {
intercepted = false;
}
} else {
// There are no touch targets and this action is not an initial down
// so this view group continues to intercept touches.
intercepted = true;
}
會掃描子View看是否有能處理事件的子View如果有坪圾，分發(fā)下去(這都是默認處理)若债，
