Android图片加载框架Coil，Kotlin

Android图片加载框架Coil，Kotlin

implementation("io.coil-kt:coil:1.4.0")

import android.os.Bundle
import android.widget.ImageView
import androidx.appcompat.app.AppCompatActivity
import androidx.lifecycle.lifecycleScope
import coil.Coil
import coil.ImageLoader
import coil.request.ImageRequest
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch


class MainActivity : AppCompatActivity() {
    companion object {
        val SIZE = 400
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.image_layout)
        val imageView = findViewById<ImageView>(R.id.image)

        val ctx = this.applicationContext

        val mImageLoader = ImageLoader.Builder(ctx).build()
        Coil.setImageLoader(mImageLoader)

        val request = ImageRequest.Builder(ctx)
            .size(SIZE)
            .data(R.mipmap.p)
            .target(imageView)
            .build()

        lifecycleScope.launch(Dispatchers.IO) {
            Coil.execute(request)
        }
    }
}

或者：

import android.graphics.drawable.Drawable
import android.os.Bundle
import android.util.Log
import android.widget.ImageView
import androidx.appcompat.app.AppCompatActivity
import androidx.lifecycle.lifecycleScope
import coil.Coil
import coil.ImageLoader
import coil.request.ImageRequest
import coil.target.Target
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch


class MainActivity : AppCompatActivity() {
    companion object {
        val SIZE = 400
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.image_layout)
        val imageView = findViewById<ImageView>(R.id.image)

        val ctx = this.applicationContext

        val mImageLoader = ImageLoader.Builder(ctx).build()
        Coil.setImageLoader(mImageLoader)

        val request = ImageRequest.Builder(ctx)
            .size(SIZE)
            .data(R.mipmap.p)
            .target(object : Target {
                override fun onStart(placeholder: Drawable?) {
                    super.onStart(placeholder)
                    Log.d("fly", "onStart")
                }

                override fun onSuccess(result: Drawable) {
                    super.onSuccess(result)

                    Log.d("fly", "onSuccess")
                    imageView.setImageDrawable(result)
                }
            })
            .build()

        lifecycleScope.launch(Dispatchers.IO) {
            Coil.execute(request)
        }
    }
}

Coil是专门针对Android平台上的Kotlin语言特性设计，这不像Glide，Glide的核心框架语言是Java。Coil实现看更细颗粒度的内存、磁盘缓存的客制化设置。