Java 禁用布局内的所有子视图
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Disabling all child views inside the layout
提问by Uma
I saw many threads related to this, before posting my question. But none worked for me. I have a RelativeLayout with many other layouts and fragments as children. I want to disable all the children of "content_view" as well as the content_view itself on a button click. I tried
在发布我的问题之前，我看到了许多与此相关的主题。但没有一个对我有用。我有一个相对布局，其中包含许多其他布局和片段作为子项。我想在单击按钮时禁用“content_view”的所有子项以及 content_view 本身。我试过
contentView.setDisabled(false);
This didn't work. I've also tried
这没有用。我也试过
for (int i = 0; i < layout.getChildCount(); i++) {
View child = layout.getChildAt(i);
child.setEnabled(false);
}
Even this didn't work. What am I doing wrong? Please find my .xml code below. I even tried placing a view above all views. Even that didn't solve my problem.
即使这样也没有用。我究竟做错了什么？请在下面找到我的 .xml 代码。我什至尝试将视图置于所有视图之上。即使那样也没有解决我的问题。
<RelativeLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical"
android:id="@+id/content_view"
android:background="#ffffff">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/channel_actionbar"
android:layout_marginLeft="0dp"
android:layout_marginTop="0dp"
android:duplicateParentState="true">
<FrameLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:id="@+id/body_container"
android:layout_below="@+id/channel_actionbar"
android:duplicateParentState="true">
<RelativeLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:id="@+id/channelList"
android:duplicateParentState="true">
<com.mobile.subview.ScrollViewWithScrollListener
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/scrollView"
android:layout_alignParentTop="false"
android:duplicateParentState="true">
<RelativeLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:duplicateParentState="true">
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/imagePlaceHolder"
android:duplicateParentState="true"></FrameLayout>
<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/channelTable"
android:layout_below="@+id/imagePlaceHolder"
android:duplicateParentState="true"></TableLayout>
<com.mobile.subview.CustomTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="You do not qualify for any engagements or channels. Please check back later."
app:typeface="fonts/HelveticaNeue"
app:customStyle="Regular"
android:id="@+id/noChannelsMessage"
android:textColor="#000"
android:textSize="@dimen/contentTextSize"
android:visibility="gone"
android:duplicateParentState="true"/>
</RelativeLayout>
</com.mobile.subview.ScrollViewWithScrollListener>
<com.mobile.subview.ParallaxImage
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/header"
android:adjustViewBounds="true"
android:layout_alignParentTop="true"
android:scaleType="fitStart"
android:visibility="invisible"
android:duplicateParentState="true"/>
</RelativeLayout>
<RelativeLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:layout_below="@+id/channel_actionbar"
android:id="@+id/sibling_view"
android:visibility="gone"
android:duplicateParentState="true"></RelativeLayout>
</FrameLayout>
</LinearLayout>
<RelativeLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:visibility="invisible"
android:id="@+id/retailersContainer"
android:layout_marginLeft="0dp"
android:duplicateParentState="true"
android:layout_below="@+id/channel_actionbar">
<fragment
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:name="com.mobile.subview.List"
android:id="@+id/retailers"
android:duplicateParentState="true"/>
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/retailers"
android:id="@+id/retailerClickBlocker"
android:duplicateParentState="true"></FrameLayout>
</RelativeLayout>
<RelativeLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="@dimen/actionBarHeight"
android:layout_alignParentTop="true"
android:id="@+id/channel_actionbar"
android:background="#F8F8F8"
android:layout_marginLeft="0dp"
android:duplicateParentState="true">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/shared_navmenu_button"
android:id="@+id/show_menu_button"
android:layout_centerVertical="true"
android:background="@null"
android:scaleType="fitCenter"
android:layout_marginLeft='5px'
android:duplicateParentState="true"/>
<com.mobile.subview.CustomTextView
android:id="@+id/channel_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textSize="@dimen/titleTextSize"
android:textColor="#000"
android:text="Test Title"
app:typeface="fonts/HelveticaNeue"
app:customStyle="Medium"
android:visibility="gone"
android:duplicateParentState="true"/>
<ImageView
android:id="@+id/logo"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_centerInParent="true"
android:src="@drawable/shared_navbar_logo2x"
android:visibility="gone"
android:scaleType="fitCenter"
android:duplicateParentState="true"/>
<com.mobile.subview.CustomButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:id="@+id/channel_done_btn"
app:typeface="fonts/HelveticaNeue"
app:customStyle="Regular"
android:visibility="gone"
android:duplicateParentState="true"/>
<com.mobile.subview.CustomButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
app:typeface="fonts/HelveticaNeue"
app:customStyle="Regular"
android:id="@+id/channel_share_btn"
android:visibility="gone" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="1dp"
android:background="#D6D6D6"
android:id="@+id/divider"
android:layout_alignParentBottom="true"
android:duplicateParentState="true"/>
</RelativeLayout>
<View
android:visibility="gone"
android:id="@+id/click_preventing_view"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#66000000"
android:clickable="false" />
</RelativeLayout>
采纳答案by Haldean Brown
Because your layouts are so heavily nested, you need to recursively disable the views. Instead of using your method, try something like this:
由于您的布局嵌套如此严重，您需要递归禁用视图。不要使用您的方法，而是尝试以下操作：
private static void disable(ViewGroup layout) {
layout.setEnabled(false);
for (int i = 0; i < layout.getChildCount(); i++) {
View child = layout.getChildAt(i);
if (child instanceof ViewGroup) {
disable((ViewGroup) child);
} else {
child.setEnabled(false);
}
}
}
then call:
然后调用：
disable(content_view);
回答by Akshay Mukadam
Even though the answer is expected instead of using recursion I think the below code will do the trick.This is what I used to disbale it. I just passed parentlayout and whether to show or hide as a boolean parameter
即使答案是预期的而不是使用递归，我认为下面的代码可以解决问题。这就是我用来取消它的方法。我刚刚通过了 parentlayout 以及是否作为布尔参数显示或隐藏
private void disable(LinearLayout layout, boolean enable) {
for (int i = 0; i < layout.getChildCount(); i++) {
View child = layout.getChildAt(i);
child.setEnabled(enable);
if (child instanceof ViewGroup) {
ViewGroup group = (ViewGroup) child;
for (int j = 0; j < group.getChildCount(); j++) {
group.getChildAt(j).setEnabled(enable);
}
}
}
回答by sma6871
Here are Kotlin versions:
以下是 Kotlin 版本：
Using Android KTX
使用安卓 KTX
fun View.changeEnableChildren(enable: Boolean) {
isEnabled = enable
(this as? ViewGroup)?.let {
forEach {
changeEnableChildren(enable)
}
}
}
Without Android KTX
没有安卓KTX
fun View.changeEnableChildren(enable: Boolean) {
isEnabled = enable
(this as? ViewGroup)?.let {
for (i in 0..it.childCount) {
changeEnableChildren(enable)
}
}
}
Note: recursive method may cause StackOverFlowErrorin that case you should replace changeEnableChildren(enable)with isEnabled=enable
注意：递归方法可能会导致StackOverFlowError在这种情况下你应该替换changeEnableChildren(enable)为isEnabled=enable
