我有一个矢量可绘制(category_bg)，并且将其用作FrameLayout的背景
<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="200dp"
android:height="100dp"
android:viewportWidth="600"
android:viewportHeight="450">
<path
android:fillColor="#FFFFFF"
android:fillType="evenOdd"
android:pathData="M24.8,21.4c0,0,73.8-8.1,161.3-8.1c77.7,0,153.9,2,231.9,2c88.5,0,156.3,6,156.3,6c5.6,0,10.1,4.5,10.1,10.1
c0,0,2,41.2,2,134.1c0,68.5,4,77.9,4,139.1c0,65-6,114.9-6,114.9c0,5.6-4.5,10.1-10.1,10.1c0,0-32.1,7.1-80.6,7.1
c-47.5,0-99.6-7.1-164.7-7.1c-77.6,0-160.9,6-219.4,6c-52.8,0-84.7-6-84.7-6c-5.6,0-10.1-4.5-10.1-10.1c0,0-4-46.6-4-111.9
c0-85.8-1-102.9-1-183.5c0-55,5-92.7,5-92.7C14.7,25.9,19.2,21.4,24.8,21.4z" />
</vector>
我想在矢量可绘制对象上添加阴影
我的xml文件
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/category_bg"
android:padding="3dp">
<com.shaker.materialComponents.view.MaskableFrameLayout
android:id="@+id/category"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:mask="@drawable/pic_mask"
app:porterduffxfermode="DST_IN">
<com.shaker.materialComponents.view.AspectRatioImageView
android:id="@+id/image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:scaleType="centerCrop"
android:src="@drawable/meal"
app:aspectRatio="0.75"
app:aspectRatioEnabled="true"
app:dominantMeasurement="width"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="@drawable/category_gradient_bg"
android:gravity="center"
android:orientation="horizontal"
android:paddingBottom="16dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:paddingTop="20dp">
<com.shaker.materialComponents.view.MaterialTextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ellipsize="end"
android:lines="1"
android:text="Salads"
android:textColor="#fff"
android:textSize="18dp"
android:textStyle="bold"
app:customFont="GothamRounded-Bold.ttf"/>
<ImageView
android:id="@+id/expand_btn"
android:layout_width="20dp"
android:layout_height="20dp"
android:src="@drawable/expand_button"/>
</LinearLayout>
</com.shaker.materialComponents.view.MaskableFrameLayout>
当前结果
添加阴影后应该是这样的
最佳答案
所有的荣誉都归给pskink，后者将其注释中的此代码链接到该问题。不幸的是，这似乎仍然是唯一的解决方案
// test code
View v = new View(this);
setContentView(v);
Drawable source = getResources().getDrawable(R.drawable.chrome);
Drawable mask = getResources().getDrawable(R.drawable.chrome_mask);;
int[] colors = {
Color.RED, Color.BLACK
};
Drawable shadow = new GradientDrawable(GradientDrawable.Orientation.LEFT_RIGHT, colors);
Shape s = new S(this, source, mask, shadow, 8);
v.setBackground(new ShapeDrawable(s));
// end of test code
〜
class S extends Shape {
Context ctx;
Drawable source;
Drawable mask;
Drawable shadow;
float shadowRadius;
Matrix matrix = new Matrix();
Bitmap bitmap;
public S(Context ctx, Drawable source, Drawable mask, Drawable shadow, float shadowRadius) {
this.ctx = ctx;
this.source = source;
this.mask = mask;
this.shadow = shadow;
this.shadowRadius = shadowRadius;
}
@Override
protected void onResize(float width, float height) {
int intrinsicWidth = source.getIntrinsicWidth();
int intrinsicHeight = source.getIntrinsicHeight();
source.setBounds(0, 0, intrinsicWidth, intrinsicHeight);
mask.setBounds(0, 0, intrinsicWidth, intrinsicHeight);
shadow.setBounds(0, 0, intrinsicWidth, intrinsicHeight);
RectF src = new RectF(0, 0, intrinsicWidth, intrinsicHeight);
RectF dst = new RectF(0, 0, width, height);
matrix.setRectToRect(src, dst, Matrix.ScaleToFit.CENTER);
Paint p = new Paint();
p.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
bitmap = Bitmap.createBitmap(intrinsicWidth, intrinsicHeight, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bitmap);
shadow.draw(c);
c.saveLayer(null, p, Canvas.ALL_SAVE_FLAG);
mask.draw(c);
c.restore();
bitmap = blurRenderScript(bitmap);
c = new Canvas(bitmap);
int count = c.saveLayer(null, null, Canvas.ALL_SAVE_FLAG);
source.draw(c);
c.saveLayer(null, p, Canvas.ALL_SAVE_FLAG);
mask.draw(c);
c.restoreToCount(count);
}
@Override
public void draw(Canvas canvas, Paint paint) {
canvas.drawColor(0xffdddddd);
canvas.drawBitmap(bitmap, matrix, null);
}
Bitmap blurRenderScript(Bitmap input) {
Bitmap output = Bitmap.createBitmap(input.getWidth(), input.getHeight(), input.getConfig());
RenderScript rs = RenderScript.create(ctx);
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
Allocation inAlloc = Allocation.createFromBitmap(rs, input, Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_GRAPHICS_TEXTURE);
Allocation outAlloc = Allocation.createFromBitmap(rs, output);
script.setRadius(shadowRadius);
script.setInput(inAlloc);
script.forEach(outAlloc);
outAlloc.copyTo(output);
rs.destroy();
return output;
}
}
关于android - 如何为矢量可绘制添加阴影？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/42002508/