使用共享首选项保存按钮单击 state

Question

我正在使用 mvvm、coroutine、kodein 和 DataBinding 处理应用程序的评论部分，例如 play store。我在我的主要活动中设置登录页面用户按下登录按钮后，评论活动将变得明显。

我在评论活动中设置了recyclerview。 在每个项目结束时，我都问了一个问题，该评论是否有帮助。 如果不按否，则按是。我使用共享首选项保存按钮 state。 例如，当我单击“是”按钮时，yesclicked（布尔变量）将保存在 sharedpref 中。 直到这里一切正常。

问题--> 我保存了 state 然后我在 recyclerview class 的 onBindViewHolder 方法中获取 YesButtonState() 并且我说当重新创建活动时将 yes 按钮的背景颜色更改为 #D5FFD7 为此您之前单击过

但什么也没发生，它没有用

此代码用于共享首选项

 val SPP_NAME = "ButtonState"
var buttonLocalState: SharedPreferences = context.getSharedPreferences(SPP_NAME, Context.MODE_PRIVATE)

fun setYesButtonState(isClicked: Boolean) {
    val userLocalDatabaseEditor: SharedPreferences.Editor = buttonLocalState.edit()
    userLocalDatabaseEditor.putBoolean("yesClicked", isClicked)
    userLocalDatabaseEditor.apply()
}

fun setNoButtonState(isClicked: Boolean) {
    val userLocalDatabaseEditor: SharedPreferences.Editor = buttonLocalState.edit()
    userLocalDatabaseEditor.putBoolean("noClicked", isClicked)
    userLocalDatabaseEditor.apply()
}

fun getYesButtonState(): Boolean? {
    if (buttonLocalState.getBoolean("yesClicked", false) == false) {
        return null
    } else {
        return true
    }

}

fun getNoButtonState(): Boolean? {
    if (buttonLocalState.getBoolean("noClicked", false) == false) {
        return null
    } else {
        return true
    }
}

fun clearButtonState() {
    val userLocalDatabaseEditor: SharedPreferences.Editor = buttonLocalState.edit()
    userLocalDatabaseEditor.clear()
    userLocalDatabaseEditor.apply()
}

这是针对recyclerview class：

        //yes button clicked
        yesbtn.setOnClickListener {
            yesClicked = true
            localStore.clearButtonState()
            localStore.setYesButtonState(yesClicked)
            val Helpful = 1

            if (localStore.getYesButtonState() == true) {
                nobtn.setBackgroundColor(Color.WHITE)
                startColorAnimation(yesbtn)
                activity.handler.postDelayed({
                    yesbtn.setBackgroundColor(Color.parseColor("#D5FFD7"))
                    nobtn.isClickable = true
                }, 892.25.toLong())
            }

            try {
                viewModel.deleteperson(
                    localStore.getUserName().toString(),
                    currentItem.id
                ).observe(mlifecycleOwner, Observer {

                })
            } catch (e: IllegalStateException) {
                e.fillInStackTrace()
            }


            viewModel.feedback(
                currentItem.id,
                localStore.getUserName().toString(),
                currentItem.description,
                Helpful
            ).observe(mlifecycleOwner, Observer {

            })
            Toast.makeText(
                context,
                "thanks for your feedback",
                Toast.LENGTH_SHORT
            ).show()
            yesbtn.isClickable = false

        }


        //no button clicked
        nobtn.setOnClickListener {
            noClicked = true
            localStore.clearButtonState()
            localStore.setNoButtonState(noClicked)
            val Helpful = 0


            if (localStore.getNoButtonState() == true) {
                yesbtn.setBackgroundColor(Color.WHITE)
                startColorAnimation(nobtn)
                activity.handler.postDelayed({
                    nobtn.setBackgroundColor(Color.parseColor("#D5FFD7"))
                    yesbtn.isClickable = true
                }, 892.25.toLong())
            }



            try {
                viewModel.deleteperson(
                    localStore.getUserName().toString(),
                    currentItem.id
                ).observe(mlifecycleOwner, Observer {

                })
            } catch (e: IllegalStateException) {
                e.fillInStackTrace()
            }
            viewModel.feedback(
                currentItem.id,
                localStore.getUserName().toString(),
                currentItem.description,
                Helpful
            ).observe(mlifecycleOwner, Observer {

            })
            Toast.makeText(
                context,
                "please tell us why",
                Toast.LENGTH_SHORT
            ).show()
            it.isClickable = false
        }

我在哪里做错了。 感谢您的帮助

Answer 1

单击按钮后尝试此操作.. 调用 notifyDataSetChanged(); 在您的适配器 class