Android RenderEffect对Bitmap高斯模糊(毛玻璃)，Kotlin（1）
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.graphics.HardwareRenderer
import android.graphics.PixelFormat
import android.graphics.RenderEffect
import android.graphics.RenderNode
import android.graphics.Shader
import android.hardware.HardwareBuffer
import android.media.ImageReader
import android.os.Bundle
import android.util.Log
import android.widget.ImageView
import androidx.appcompat.app.AppCompatActivityclass MainActivity : AppCompatActivity() {override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)setContentView(R.layout.image_layout)//val imageView1 = findViewById<ImageView>(R.id.image1)val imageView2 = findViewById<ImageView>(R.id.image2)val srcBitmap = BitmapFactory.decodeResource(resources, R.mipmap.img)val radius = 10fval t = System.currentTimeMillis()val imageReader = ImageReader.newInstance(srcBitmap.width,srcBitmap.height,PixelFormat.RGBA_8888,1,HardwareBuffer.USAGE_GPU_SAMPLED_IMAGE or HardwareBuffer.USAGE_GPU_COLOR_OUTPUT)val renderNode = RenderNode("BlurEffect")val hardwareRenderer = HardwareRenderer()hardwareRenderer.setSurface(imageReader.surface)hardwareRenderer.setContentRoot(renderNode)renderNode.setPosition(0, 0, imageReader.width, imageReader.height)val blurRenderEffect = RenderEffect.createBlurEffect(radius, radius,Shader.TileMode.MIRROR)renderNode.setRenderEffect(blurRenderEffect)val renderCanvas = renderNode.beginRecording()renderCanvas.drawBitmap(srcBitmap, 0f, 0f, null)renderNode.endRecording()hardwareRenderer.createRenderRequest().setWaitForPresent(true).syncAndDraw()val image = imageReader.acquireNextImage() ?: throw RuntimeException("No Image")val hardwareBuffer = image.hardwareBuffer ?: throw RuntimeException("No HardwareBuffer")val bmp = Bitmap.wrapHardwareBuffer(hardwareBuffer, null)?: throw RuntimeException("Create Bitmap Failed")Log.d("fly", "cost time=${System.currentTimeMillis() - t}")imageView2.setImageBitmap(bmp)//清理工作hardwareBuffer.close()image.close()imageReader.close()renderNode.discardDisplayList()hardwareRenderer.destroy()}
}
遗留问题，需要抽象封装一下，复用部分关键类对象。
Android新版高斯模糊(毛玻璃)官方实现，Kotlin-CSDN博客文章浏览阅读577次，点赞13次，收藏4次。Android拼接合并图片生成长图代码实现合并两张图片，以第一张图片的宽度为标准，如果被合并的第二张图片宽度和第一张不同，那么就以第一张图片的宽度为准线，对第二张图片进行缩放。Android拼接合并图片生成长图代码实现合并两张图片，以第一张图片的宽度为标准，如果被合并的第二张图片宽度和第一张不同，那么就以第一张图片的宽度为准线，对第二张图片进行缩放。Android BitmapShader简洁实现马赛克/高斯模糊（毛玻璃），Kotlin（三）_android kotlin实现毛玻璃遮罩-CSDN博客。https://blog.csdn.net/zhangphil/article/details/145575404
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