我希望能够对禁用的交换机上的单击事件做出响应,这可能吗?
我有一个开关,直到用户填写一些信息才会启用,所以它看起来像这样:
如果用户使用一个对话框单击禁用的开关,我想提示用户填写信息,如下所示:
mySwitch.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!userInfo.isFilled){
new AlertDialog.Builder(MainActivity.this)
.setTitle("Fill out info first!")
.setMessage("You must first fill out info before turning on this featurel")
.setNeutralButton("Okay", null)
.show();
}
}
});
但是,当我单击禁用的开关时,onClick()
不会被触发,那么当用户单击它时,我如何获取它呢?
发布于 2016-08-09 04:17:37
您可以将一个透明的View
放在Switch
的顶部,并在开关的对面切换其启用状态,然后在单击此覆盖的View
时显示消息。
发布于 2016-08-18 18:22:23
从View.java源代码中,
public boolean dispatchTouchEvent(MotionEvent event) {
// If the event should be handled by accessibility focus first.
if (event.isTargetAccessibilityFocus()) {
// We don't have focus or no virtual descendant has it, do not handle the event.
if (!isAccessibilityFocusedViewOrHost()) {
return false;
}
// We have focus and got the event, then use normal event dispatch.
event.setTargetAccessibilityFocus(false);
}
boolean result = false;
if (mInputEventConsistencyVerifier != null) {
mInputEventConsistencyVerifier.onTouchEvent(event, 0);
}
final int actionMasked = event.getActionMasked();
if (actionMasked == MotionEvent.ACTION_DOWN) {
// Defensive cleanup for new gesture
stopNestedScroll();
}
if (onFilterTouchEventForSecurity(event)) {
//noinspection SimplifiableIfStatement
ListenerInfo li = mListenerInfo;
if (li != null && li.mOnTouchListener != null
&& (mViewFlags & ENABLED_MASK) == ENABLED
&& li.mOnTouchListener.onTouch(this, event)) {
result = true;
}
if (!result && onTouchEvent(event)) {
result = true;
}
}
if (!result && mInputEventConsistencyVerifier != null) {
mInputEventConsistencyVerifier.onUnhandledEvent(event, 0);
}
// Clean up after nested scrolls if this is the end of a gesture;
// also cancel it if we tried an ACTION_DOWN but we didn't want the rest
// of the gesture.
if (actionMasked == MotionEvent.ACTION_UP ||
actionMasked == MotionEvent.ACTION_CANCEL ||
(actionMasked == MotionEvent.ACTION_DOWN && !result)) {
stopNestedScroll();
}
return result;
}
enabled标志确保使用UnhandledEvents,但不会将其传递给侦听器,从而绕过所有可能的code.So不可能在禁用的视图上侦听事件。
也就是说,你的选择是,
setClickable(false)
和消费触摸事件)发布于 2016-08-21 19:42:04
对于用户之前的操作,您可以将onTouchListener
和react设置为boolean
(例如isToggleEnable
)引用:
mySwitch.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if(!isToggleEnable){
//Taost here
}
//If isToggleEnable = false on return OnClickListener won't be called
return isToggleEnable;
}
});
https://stackoverflow.com/questions/38818729
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