xfermode基础效果、图片处理效果

Author: crazyqiang

app/src/main/kotlin/org/ninetripods/mq/study/fragment/XFerModeIMGFragment.kt

@@ -37,7 +37,7 @@ class XFerModeIMGFragment : BaseFragment() {
  }
 
  override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
- recyclerView.layoutManager = GridLayoutManager(context, 2)
+ recyclerView.layoutManager = GridLayoutManager(context, 3)
  context?.let { recyclerView.createDivider(it, 5.dp2px().toFloat()) }
 
  // 准备数据

app/src/main/kotlin/org/ninetripods/mq/study/util/DrawableUtil.kt

@@ -2,6 +2,7 @@ package org.ninetripods.mq.study.util
 
 import android.content.Context
 import android.graphics.Color
+import android.graphics.drawable.Drawable
 import android.graphics.drawable.ShapeDrawable
 import android.graphics.drawable.shapes.RectShape
 import androidx.recyclerview.widget.DividerItemDecoration
@@ -11,18 +12,24 @@ import androidx.recyclerview.widget.RecyclerView
  * @param context 上下文，用于转换 dp 到 px
  * @param heightDp 分割线的高度（单位：dp）
  * @param color 分割线的颜色
+ * @param drawable 传入的drawable
  */
-fun RecyclerView.createDivider(context: Context, heightDp: Float = 0.5f, color: Int = Color.TRANSPARENT) {
- //创建动态分割线 Drawable
- val shapeDrawable = ShapeDrawable(RectShape()).apply {
+fun RecyclerView.createDivider(
+ context: Context,
+ heightDp: Float = 0.5f,
+ color: Int = Color.TRANSPARENT,
+ drawable: Drawable? = null
+) {
+ //优先使用传入的drawable，没有传入的话创建动态分割线Drawable
+ val shapeDrawable = drawable ?: ShapeDrawable(RectShape()).apply {
  // 设置分割线的高度
  intrinsicHeight = (heightDp * context.resources.displayMetrics.density + 0.5f).toInt() // 将 dp 转换为 px
  // 设置分割线的颜色
  paint.color = color
  }
  //将动态分割线添加到 RecyclerView
  val dividerItemDecoration = DividerItemDecoration(context, DividerItemDecoration.VERTICAL).apply {
- setDrawable(shapeDrawable)
+  setDrawable(shapeDrawable)
  }
  this.addItemDecoration(dividerItemDecoration)
 }

app/src/main/kotlin/org/ninetripods/mq/study/widget/XfermodeImgView.kt

@@ -58,7 +58,7 @@ class XfermodeImgView @JvmOverloads constructor(
  super.onDraw(canvas)
  if (!::imageBitmap.isInitialized) return
 
- canvas.drawRect(mRectF, mStrokePaint) //绘制边框
+ //canvas.drawRect(mRectF, mStrokePaint) //绘制边框
 
  if (mCurShape == SHAPE_ORIGIN) {
  //展示原图