如何在 DefaultClusterRenderer 类中加载 url 图像列表

问题描述

当我尝试通过 imageloader 库加载图像列表时遇到问题 在 ClusterRenderer 的许多标记中

我被要求创建一个类似的页面

1- 我通过在 firebase 数据库中查询获得位置

   override fun onDataChange(snapshot: DataSnapshot) {
            mGoogleMap?.clear()
            var arrays=ArrayList<Firebaseusermodel>()
            for(item in snapshot.children){
                var user: FirebaseusermodelMArks?=item.getValue(FirebaseusermodelMArks::class.java)
                if(!user!!.firebaseID.equals(firebaseid)){
                    mClusterManager!!.addItem(user)
                    mClusterManager!!.cluster();
                    
                        }

            }

2-i 为集群渲染添加类以显示像上一张图​​片一样的图像

class UserRender(context: Context,map: GoogleMap,clusterManager: ClusterManager ) : DefaultClusterRenderer(context,map,clusterManager) {

private var iconGenerator: IconGenerator? = null
private var clusterIconGenerator: IconGenerator? = null
private var imageView: ImageView? = null
private var clusterImageView: ImageView? = null
private var markerWidth = 0
private var markerHeight = 0
private val TAG = "ClusterRenderer"


init {
    clusterIconGenerator = IconGenerator(context.applicationContext)
    val clusterView: View = LayoutInflater.from(context).inflate(R.layout.custome_mark,null)
    clusterIconGenerator!!.setContentView(clusterView)
    clusterImageView = clusterView.findViewById(R.id.profile_image)



    iconGenerator = IconGenerator(context.applicationContext)
    imageView = ImageView(context.applicationContext)
    markerWidth = context.resources.getDimension(R.dimen.d6).toInt()
    markerHeight = context.resources.getDimension(R.dimen.d6).toInt()
    imageView!!.setLayoutParams(ViewGroup.LayoutParams(markerWidth,markerHeight))
    val padding =
        context.resources.getDimension(R.dimen.d1).toInt()
    imageView!!.setPadding(padding,padding,padding)
    iconGenerator!!.setContentView(imageView)



}

override fun onClusterItemRendered(clusterItem: FirebaseusermodelMArks?,marker: Marker?) {
    Coroutinescope(dispatchers.Main).launch {
        BasicTools.loadImage(clusterItem?.image!!,imageView!!,object : DownloadListener {
        override fun completed(status: Boolean,bitmap: Bitmap) {
            imageView!!.setimageBitmap(bitmap)
            val icon = iconGenerator!!.makeIcon(clusterItem?.name)
            marker!!.setIcon(BitmapDescriptorFactory.fromBitmap(bitmap))
            marker.isVisible=true

        }
    })}
}






/*---------------------------------------------------------------*/


override fun onClusterRendered(cluster: Cluster<FirebaseusermodelMArks>?,marker: Marker?) {
    super.onClusterRendered(cluster,marker)
    val iterator: Iterator<FirebaseusermodelMArks> = cluster!!.items.iterator()
    Coroutinescope(dispatchers.Main).launch {
    BasicTools.loadImage(
        iterator.next()?.image!!,clusterImageView!!,object : DownloadListener {
            override fun completed(status: Boolean,bitmap: Bitmap) {
                clusterImageView!!.setimageBitmap(bitmap)
                Log.i("TEST_TEST","${iterator.next().name}----------------")
                val icon = iconGenerator!!.makeIcon(iterator.next()?.name)
                marker!!.setIcon(BitmapDescriptorFactory.fromBitmap(bitmap))

            }
        })
}
}

override fun shouldRenderAsCluster(cluster: Cluster<FirebaseusermodelMArks>?): Boolean {
    return cluster!!.getSize() > 1
}

}

3-loadImage 函数有这个参数

有趣的loadImage(url: String,image_view: ImageView,listener: DownloadListener?)

问题是应用程序只能显示列表中的一张图片 无法显示所有图片

代码有什么问题？

解决方法

答案是使用重复的函数

  private fun saveBitmap(arrays: ArrayList<FirebaseUserModelMArks>,firstLanuch:Boolean=false) {
    if(firstLanuch)
    index=arrays.size-1
    if(index>=0){
        BasicTools.loadImage(arrays.get(index).image!!,iv_test!!,object : DownloadListener {
            override fun completed(status: Boolean,bitmap: Bitmap) {
                //   iv_test!!.setImageBitmap(bitmap)

                arrays.get(index).imageBitmap=bitmap
                mClusterManager!!.addItem(arrays.get(index))

                Log.i("TEST_TEST","$index")
                index--
                saveBitmap(arrays)

            }
        })
    }else {
        mClusterManager?.cluster()
    }
}

在添加所有您想要数组列表的用户后添加此功能 像这样

      override fun onDataChange(snapshot: DataSnapshot) {
            mGoogleMap?.clear()
            mClusterManager?.clearItems()
            var arrays=ArrayList<FirebaseUserModelMArks>()
            for(item in snapshot.children){
                var user: FirebaseUserModelMArks? 
                =item.getValue(FirebaseUserModelMArks::class.java)
                if(!user!!.firebaseID.equals(firebaseid)){
                   // mClusterManager!!.addItem(user)
                    arrays.add(user)

                    Log.i("TEST_TEST","${user.name}---------")


                        }

            }





      //      mClusterManager!!.cluster();



            saveBitmap(arrays,true)