如何使用Android辅助功能切换选中状态？

Question

I am not able to toggle the checked state of ui node with class android.widget.Switch I have tried .performAction(AccessibilityNodeInfo.ACTION_SELECT) and .performAction(AccessibilityNodeInfo.ACTION_CLICK) but it didn't workout. Thanks for the help..

Answer 1

You may set the state of the Switch as checked through its View object when some event occours (like a button click):

ViewCompat.setAccessibilityLiveRegion(mySwitch, ViewCompat.ACCESSIBILITY_LIVE_REGION_POLITE)
mySwitch.isChecked = true

Setting the accessibility state as checked would be possible using AccessibilityDelegate , but for a Switch , the current View state (on or off) is more important than the one set from the delegate. Below is the code to set a custom AccessibilityDelegate to a View .

ViewCompat.setAccessibilityDelegate(mySwitch, object : AccessibilityDelegateCompat() {
    override fun onInitializeAccessibilityNodeInfo(host: View?, info: AccessibilityNodeInfoCompat?) {
        super.onInitializeAccessibilityNodeInfo(host, info)

        info?.isChecked = true
    }
})