增加Glide加载图片时使图片进行高斯模糊的工具类

2020-01-17 14:47:31 +08:00
parent e5b0bd0df8
commit 70d2e92560
1 changed files with 57 additions and 0 deletions
--- a/foudations/mogo-utils/src/main/java/com/mogo/utils/glide/GlideBlurTransformation.java
+++ b/foudations/mogo-utils/src/main/java/com/mogo/utils/glide/GlideBlurTransformation.java
@@ -0,0 +1,57 @@
+package com.mogo.utils.glide;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.renderscript.Allocation;
+import android.renderscript.Element;
+import android.renderscript.RenderScript;
+import android.renderscript.ScriptIntrinsicBlur;
+
+import androidx.annotation.NonNull;
+
+import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
+import com.bumptech.glide.load.resource.bitmap.CenterCrop;
+
+/**
+ * 使用Glide加载图片时，使该图片进行高斯模糊
+ * 基本用法：Glide.with(this).load(userInfo.headImgurl).apply(RequestOptions.bitmapTransform(GlideBlurTransformation(this))).into(ivCardBg)
+ *
+ * @author tongchenfei
+ */
+public class GlideBlurTransformation extends CenterCrop {
+    private static final float DEFAULT_BLUR_RADIUS = 25F;
+
+    private Context context;
+    private float blurRadius;
+    public GlideBlurTransformation(Context context) {
+        this(context, DEFAULT_BLUR_RADIUS);
+    }
+
+    public GlideBlurTransformation(Context context, float blurRadius) {
+        this.context = context;
+        this.blurRadius = blurRadius;
+    }
+
+    @Override
+    protected Bitmap transform(@NonNull BitmapPool pool, @NonNull Bitmap toTransform,
+                               int outWidth, int outHeight) {
+        Bitmap bitmap = super.transform(pool, toTransform, outWidth, outHeight);
+        return blurBitmap(bitmap, blurRadius, (int) (outWidth * 0.5), (int) (outHeight * 0.5));
+    }
+
+    private Bitmap blurBitmap(Bitmap bitmap, float blurRadius, int outWidth, int outHeight) {
+        Bitmap inputBitmap = Bitmap.createScaledBitmap(bitmap, outWidth, outHeight, false);
+        Bitmap outBitmap = Bitmap.createBitmap(inputBitmap);
+
+        RenderScript renderScript = RenderScript.create(context);
+        ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(renderScript,
+                Element.U8_4(renderScript));
+        Allocation tmpIn = Allocation.createFromBitmap(renderScript, inputBitmap);
+        Allocation tmpOut = Allocation.createFromBitmap(renderScript, outBitmap);
+        blurScript.setRadius(blurRadius);
+        blurScript.setInput(tmpIn);
+        blurScript.forEach(tmpOut);
+        tmpOut.copyTo(outBitmap);
+        return outBitmap;
+    }
+}