blocks|key|47521|text|调用jumpDrawablesToCurrentState()跳过动画|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|47522|switchCompat.setChecked(true);
switchCompat.jumpDrawablesToCurrentState();|code-block|syntax|javascript|47523|entityMap^0|2|T|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Call <code>jumpDrawablesToCurrentState()</code> to skip the animation

<pre><code>switchCompat.setChecked(true);
switchCompat.jumpDrawablesToCurrentState();
</code></pre>

blocks|key|47494|text|我终于找到了一个解决方案，但看起来并不是很干净：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|47495|ViewGroup+viewGroup+=+(ViewGroup)+view;+//+the+recycled+view
viewGroup.removeView(switch);
switch.setChecked(states[index]);
viewGroup.addView(switch);|code-block|syntax|javascript|47496|如果有更好的解决方案，请分享。|47497|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I finally found a solution but seems not really clean:

<pre><code>ViewGroup viewGroup = (ViewGroup) view; // the recycled view
viewGroup.removeView(switch);
switch.setChecked(states[index]);
viewGroup.addView(switch);
</code></pre>

If a better solution exists, please share it.

blocks|key|4554160|text|如果使用Android数据绑定，可能会出现列表中动画播放的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4554161|要解决此问题，请在设置数据后运行binding.executePendingBindings()方法-它将刷新当前帧中组件的绑定状态，而不会等待下一个绑定状态。|offset|length|style|CODE|4554162|正如您可能已经猜到的那样，- next帧是动画|4554163|entityMap^0|0|G|W|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

The issue in with animation playing in the list can be present if you use Android Databinding.

To resolve it, run <code>binding.executePendingBindings()</code> method after you set data – it will refresh binding state for the component in current frame and will not wait for the next one to come.

As you have probably guessed already – next frame is the animation

blocks|key|4554131|text|使用SwitchCompat和DataBinding|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4554132|@BindingAdapter({"bind:checkedState"})
public+static+void+setCheckedState(SwitchCompat+switchView,+boolean+checked)+{
++++int+visibility+=+switchView.getVisibility();
++++switchView.setVisibility(View.INVISIBLE);
++++switchView.setChecked(checked);
++++switchView.setVisibility(visibility);
}|code-block|syntax|javascript|4554133|然后在xml中：|4554134|<android.support.v7.widget.SwitchCompat
++++android:id="@%2Bid/my_switch"
++++android:layout_width="wrap_content"
++++android:layout_height="wrap_content"
++++app:checkedState="@{my_data.checked}"/>|4554135|别忘了给executePendingBindings()打电话(谢谢AAverin)|offset|length|style|CODE|4554136|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/users/453991/aaverin^0|0|0|0|0|4|O|Y|7|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@$M|13|N|14|O|P]]|9|@$M|15|N|16|1|17]]|A|$]]|$1|Q|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

Using SwitchCompat and DataBinding

<pre><code>@BindingAdapter({"bind:checkedState"})
public static void setCheckedState(SwitchCompat switchView, boolean checked) {
 int visibility = switchView.getVisibility();
 switchView.setVisibility(View.INVISIBLE);
 switchView.setChecked(checked);
 switchView.setVisibility(visibility);
}
</code></pre>

Then in xml:

<pre><code>&lt;android.support.v7.widget.SwitchCompat
 android:id="@+id/my_switch"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 app:checkedState="@{my_data.checked}"/&gt;
</code></pre>

And don't forget to call <code>executePendingBindings()</code> (thanks <a href="https://stackoverflow.com/users/453991/aaverin">AAverin</a>)

blocks|key|47539|text|对于Kotlin开发人员：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|47540|fun+SwitchCompat.setCheckedWithoutAnimation(checked:+Boolean)+{
++++val+beforeVisibility+=+visibility
++++visibility+=+View.INVISIBLE
++++isChecked+=+checked
++++visibility+=+beforeVisibility
}|code-block|syntax|javascript|47541|和用法：|47542|mySwitch.setCheckedWithoutAnimation(true)|47543|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

For Kotlin developer:

<pre><code>fun SwitchCompat.setCheckedWithoutAnimation(checked: Boolean) {
 val beforeVisibility = visibility
 visibility = View.INVISIBLE
 isChecked = checked
 visibility = beforeVisibility
}
</code></pre>

And the usage:

<pre><code>mySwitch.setCheckedWithoutAnimation(true)
</code></pre>

blocks|key|4554213|text|Rolf+ツ答案的Kotlin示例。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4554214|class+SwitchImproved(context:+Context,+attributeSet:+AttributeSet)+:+SwitchCompat(context,+attributeSet)+{

++++private+lateinit+var+methodCancelPositionAnimator:+Method
++++private+lateinit+var+methodSetThumbPosition:+Method

++++init+{
++++++++initHack()
++++}

++++fun+setChecked(checked:+Boolean,+animate:+Boolean+=+true)+{
++++++++super.setChecked(checked)

++++++++if+(!animate)+{
++++++++++++methodCancelPositionAnimator.invoke(this)
++++++++++++methodSetThumbPosition.invoke(this,+if+(isChecked)+1+else+0)
++++++++}
++++}

++++private+fun+initHack()+{
++++++++methodCancelPositionAnimator+=+SwitchCompat::class.java.getDeclaredMethod("cancelPositionAnimator")
++++++++methodSetThumbPosition+=+SwitchCompat::class.java.getDeclaredMethod("setThumbPosition",+Float::class.javaPrimitiveType)
++++++++methodCancelPositionAnimator.isAccessible+=+true
++++++++methodSetThumbPosition.isAccessible+=+true
++++}
}|code-block|syntax|javascript|4554215|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/users/1052697/rolf-%25E3%2583%2584^0|0|6|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Kotlin sample of <a href="https://stackoverflow.com/users/1052697/rolf-%E3%83%84">Rolf ツ</a> answer.
<pre><code>class SwitchImproved(context: Context, attributeSet: AttributeSet) : SwitchCompat(context, attributeSet) {

 private lateinit var methodCancelPositionAnimator: Method
 private lateinit var methodSetThumbPosition: Method

 init {
 initHack()
 }

 fun setChecked(checked: Boolean, animate: Boolean = true) {
 super.setChecked(checked)

 if (!animate) {
 methodCancelPositionAnimator.invoke(this)
 methodSetThumbPosition.invoke(this, if (isChecked) 1 else 0)
 }
 }

 private fun initHack() {
 methodCancelPositionAnimator = SwitchCompat::class.java.getDeclaredMethod(&quot;cancelPositionAnimator&quot;)
 methodSetThumbPosition = SwitchCompat::class.java.getDeclaredMethod(&quot;setThumbPosition&quot;, Float::class.javaPrimitiveType)
 methodCancelPositionAnimator.isAccessible = true
 methodSetThumbPosition.isAccessible = true
 }
}
</code></pre>

blocks|key|47633|text|在我的例子中，我使用的是新的材质库：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|47634|implementation+'com.google.android.material:material:1.1.0-alpha07'|code-block|syntax|javascript|47635|在这个类的setChecked方法中有这样的条件：|47636|if+(getWindowToken()+!=+null+&&+ViewCompat.isLaidOut(this))|47637|所以我所做的就是创建一个从这个SwitchMaterial扩展的类，并处理"isLaidOut“。代码是下一个(省略构造函数)：|47638|class+SwitchCustomView+:+SwitchMaterial+{

++private+var+laidOutForAnimation+=+false

++fun+setChecked(checked:+Boolean,+animate:+Boolean)+{
++++if+(!animate)+{
++++++laidOutForAnimation+=+true
++++}
++++super.setChecked(checked)
++++laidOutForAnimation+=+false
++}

++override+fun+isLaidOut():+Boolean+{
++++return+if+(laidOutForAnimation)+{
++++++return+false
++++}+else+{
++++++super.isLaidOut()
++++}
++}
}|47639|然后只需在xml中使用这个类，并以编程方式调用|47640|setChecked(checked:+Boolean,+animate:+Boolean)|47641|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|10|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

In my case, I am using the new material library:

<pre><code>implementation 'com.google.android.material:material:1.1.0-alpha07'
</code></pre>

and in the setChecked method of this class there is this condition:

<pre><code>if (getWindowToken() != null &amp;&amp; ViewCompat.isLaidOut(this))
</code></pre>

So what I did was to create a class that extends from this SwitchMaterial, and deal with "isLaidOut". The code is the next one (omitting constructors):

<pre><code>class SwitchCustomView : SwitchMaterial {

 private var laidOutForAnimation = false

 fun setChecked(checked: Boolean, animate: Boolean) {
 if (!animate) {
 laidOutForAnimation = true
 }
 super.setChecked(checked)
 laidOutForAnimation = false
 }

 override fun isLaidOut(): Boolean {
 return if (laidOutForAnimation) {
 return false
 } else {
 super.isLaidOut()
 }
 }
}
</code></pre>

Then just use this class in your xml and call programatically

<pre><code>setChecked(checked: Boolean, animate: Boolean)
</code></pre>

In my Android project, I have a <code>ListView</code> with rows containing <code>SwitchCompat</code> items (AppCompat for <code>Switch</code> widget).

My problem occurs when I scroll into the list and <code>getView(...)</code> method of <code>MyAdapter</code> is invoked with a <code>recycled</code> view. I redefine the correct <code>Switch</code> state but the animation is visible.

There is a solution to prevent the animation in this case?

<img src="https://i.stack.imgur.com/e2kjf.gif" alt="enter image description here">

Change Switch state without animation

在我的Android项目中，我有一个包含SwitchCompat项的行的ListView ( Switch小部件的AppCompat)。当我滚动到列表中，并使用recycled视图调用MyAdapter的getView(...)方法时，我的问题就出现了。我重新定义了正确的Switch状态，但动画是可见的。在这种情况下有没有防止动画的解决方案？​​

问在没有动画的情况下更改开关状态
EN

回答 7

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