如何将加载栏添加到视图位于另一个 activity 中的适配器 class

Question

我正在尝试在适配器 class 中添加 loadingbar，其中相同的视图在 mainactivity.I 中使用 doAsync 方法加载单击 mainactivity 内的应用程序图标时的应用程序。以下是我在 doAsync 方法中使用 loadingbar 时遇到的错误。

android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

下面是适配器class

Adapter.kt

class Adapter(ctx: Context, private val appInfoList: ArrayList<AppInfoModel>, private val contentResolver: ContentResolver,
              private val packageManager: PackageManager,
              private val loadingIndicator: AVLoadingIndicatorView,
              private val applicationContext: Context) : RecyclerView.Adapter<Adapter.MyViewHolder>()  {
    private val inflater: LayoutInflater

    init {
        inflater = LayoutInflater.from(ctx)
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): Adapter.MyViewHolder {
        val view = inflater.inflate(R.layout.list_item, parent, false)
        return MyViewHolder(view)
    }

    override fun onBindViewHolder(holder: Adapter.MyViewHolder, position: Int) {
        var itemView: View? = null
        holder.appIcon.setImageDrawable(appInfoList[position].appIcon)
        holder.appName.setText(appInfoList[position].appName)
        holder.versionNumber.setText(appInfoList[position].versionNumber)
        if (!appInfoList[position].isInstalled) {
            holder.appInfoCard.foreground = ColorDrawable(Color.parseColor("#CCFFFFFF"))
            holder.appInfoCard.isEnabled = false
            holder.warningIcon.visibility = View.VISIBLE
        }
        holder.appInfoCard.setOnClickListener() {
            Log.e("App opened", appInfoList[position].appName)
            var loadingBar:AVLoadingIndicatorView= loadingIndicator.findViewById(R.id.avi)
            Log.d("Loading bar", loadingBar.toString())
            doAsync {
                try {
                    loadingBar!!.setVisibility(View.VISIBLE);
                    LauncherUtils.setDynamicConfig(contentResolver, packageManager,applicationContext, appInfoList[position].auxName!!, appInfoList[position].packageName!!)
                }
                catch (e: Exception) {
                    Log.e("Exception-launcher", e.toString())
                }
                uiThread {

                    //loadingBar!!.setVisibility(View.INVISIBLE)
                }

            }
        }
    }

如有任何帮助，我们将不胜感激。

Answer 1

正如堆栈跟踪所说，您不应该从后台线程设置任何视图的可见性。将 loadingBar!!.setVisibility(View.VISIBLE); 移动到 uiThread{} 可能会解决您的问题。

如何将加载栏添加到视图位于另一个 activity 中的适配器 class

How to add loading bar to the adapter class where the view is inside another activity

android

kotlin

activity-indicator