實(shí)現(xiàn)效果：

image.png

image.png

布局實(shí)現(xiàn)：

<?xml version="1.0" encoding="utf-8"?>
<androidx.core.widget.NestedScrollView
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/ivImg"
        android:adjustViewBounds="true"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</androidx.core.widget.NestedScrollView>

activity實(shí)現(xiàn)

import android.annotation.SuppressLint
import android.graphics.BitmapFactory
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.bumptech.glide.Glide
import com.bumptech.glide.request.target.SimpleTarget
import com.bumptech.glide.request.transition.Transition
import kotlinx.android.synthetic.main.activity_glide_view.*
import java.io.File


/** 
 *@Created by wrs on 2020/11/7,15:46
 *@packageName: com.dsy.tui
 *@Description: 圖片加載
 */
class GlideImageActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_glide_view)

        val imgPath = "https://yd-imgs.380star.com/upload/uploadfile/2020/4/23/158763676174928364815980349689.jpg"

        Glide.with(this).load(imgPath)
            .downloadOnly(object : SimpleTarget<File?>() {
                override fun onResourceReady(resource: File, transition: Transition<in File?>?) {
                    // 將保存的圖片地址給SubsamplingScaleImageView,這里注意設(shè)置ImageViewState設(shè)置初始顯示比例
                    val bitmap =
                        BitmapFactory.decodeFile(resource.getAbsolutePath(), getBitmapOption(1))
                    // 顯示處理好的Bitmap圖片
                    ivImg.setImageBitmap(bitmap)
                }

            })

    }

    /**
     * 設(shè)置Bitmap的Options
     */
    private fun getBitmapOption(inSampleSize: Int): BitmapFactory.Options? {
        System.gc()
        val options = BitmapFactory.Options()
        options.inPurgeable = true
        options.inSampleSize = inSampleSize
        return options
    }
}