Android - Glide 4.0.0-RC0：如何在成功加载 SVG 后为 ImageView 设置色调颜色

Question

我跟着这个样本： https : //github.com/bumptech/glide/tree/master/samples/svg/src/main/java/com/bumptech/glide/samples/svg

使用 Glide 4.0.0-RC0 成功加载 SVG 文件后，我想为 ImageView 设置色调颜色，但 setColorFilter 不起作用

我的来源：

package com.example.quangson.glidesvg;

import static com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions.withCrossFade;

import android.content.ContentResolver;
import android.graphics.PorterDuff;
import android.graphics.drawable.PictureDrawable;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;
import com.bumptech.glide.RequestBuilder;
import com.example.quangson.glidesvg.glide.GlideApp;
import com.example.quangson.glidesvg.glide.SvgSoftwareLayerSetter;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "SVGActivity";
    private ImageView imageViewSVG;
    private ImageView imageViewPNG;
    private RequestBuilder<PictureDrawable> requestBuilder;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        imageViewSVG = (ImageView) findViewById(R.id.svg_image_view1);
        imageViewPNG = (ImageView) findViewById(R.id.svg_image_view2);

        imageViewPNG.setImageResource(R.drawable.image_mylogo);

        requestBuilder = GlideApp.with(this)
                .as(PictureDrawable.class)
                .error(R.drawable.image_error)
                .transition(withCrossFade())
                .listener(new SvgSoftwareLayerSetter());
        Uri uri = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" + getPackageName() + "/"  + R.raw.android_toy_h);
        requestBuilder.load(uri).into(imageViewSVG);

        imageViewSVG.setColorFilter(getResources().getColor(R.color.colorAccent), PorterDuff.Mode.SRC_IN);
        imageViewPNG.setColorFilter(getResources().getColor(R.color.colorAccent), PorterDuff.Mode.SRC_IN);
    }
}

在我的来源：

我将 PNG 图像（从 res/drawable）加载到 imageViewPNG 中，并为 imageViewPNG 设置了颜色过滤器⇒ WORKING

我将 SVG 图像（从 res/raw）加载到 imageViewSVG 和 setColorFilter for imageViewSVG ⇒ NOT WORKING（成功加载 SVG 文件但无法 setColorFilter）

请帮我设置 imageViewSVG 的色调颜色。

---

我尝试像下面的代码一样进行编辑以制作生成 BitmapDrawable 的 SvgDrawableTranscoder（然后将 setColorFilter ），但它不起作用，帮帮我吗？

package com.sonzero.chibiz.glide;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Picture;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.PictureDrawable;

import com.bumptech.glide.load.engine.Resource;
import com.bumptech.glide.load.resource.SimpleResource;
import com.bumptech.glide.load.resource.transcode.ResourceTranscoder;
import com.caverock.androidsvg.SVG;

/**
 * Convert the {@link SVG}'s internal representation to an Android-compatible one
 * ({@link Picture}).
 */
public class SvgDrawableTranscoder implements ResourceTranscoder<SVG, BitmapDrawable> {
    @Override
    public Resource<BitmapDrawable> transcode(Resource<SVG> toTranscode) {
        SVG svg = toTranscode.get();
        Picture picture = svg.renderToPicture();
        PictureDrawable drawable = new PictureDrawable(picture);
        Bitmap bitmap = asBitmap(drawable);
        BitmapDrawable mDrawable = new BitmapDrawable(bitmap);
        return new SimpleResource<BitmapDrawable>(mDrawable);
    }

    public Bitmap asBitmap(PictureDrawable pd) {
        Bitmap bitmap = Bitmap.createBitmap(pd.getIntrinsicWidth(),pd.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        canvas.drawPicture(pd.getPicture());
        return bitmap;
    }
}

Answer 1

Glide SVG 加载器生成一个PictureDrawable 。 最后我检查，PictureDrawables 不支持setColorFilter()方法。

您可以尝试制作您自己的SvgDrawableTranscoder版本，该版本生成BitmapDrawable并使用 AndroidSVG 的renderToCanvas()方法绘制到该版本中。

更新

AndroidSVG 1.4+ 现在支持在渲染时传递额外的 CSS。 创建一个RenderOptions对象并使用.css()提供一些 CSS 规则。 然后，您可以传递RenderOptions反对renderToPicture()在你的SvgDrawableTranscoder 。

RenderOptions  renderOptions = RenderOptions.create().css("path { fill: red; }");
Picture picture = svg.renderToPicture(renderOptions);
...etc...

RenderOptions 文档

Answer 2

在这里我的方法工作正常

步骤 1使用 glide 将 svg 设置为 imageView（在我的情况下 it.menuItemIcon 是 ImageView 对象）

  Glide.with(it.context).`as`(PictureDrawable::class.java).load(itemData.imageURL)
                .addListener(object: RequestListener<PictureDrawable> {
                    override fun onLoadFailed(
                        e: GlideException?,
                        model: Any?,
                        target: Target<PictureDrawable>?,
                        isFirstResource: Boolean
                    ): Boolean {
                        it.menuItemIcon.visibility = View.INVISIBLE
                        return false
                    }

                    override fun onResourceReady(
                        resource: PictureDrawable?,
                        model: Any?,
                        target: Target<PictureDrawable>?,
                        dataSource: DataSource?,
                        isFirstResource: Boolean
                    ): Boolean {
                        it.menuItemIcon.visibility = View.VISIBLE
                        return false
                    }

                })
                .addListener(SvgSoftwareLayerListener()).into(it.menuItemIcon)

Step-2现在点击按钮调用这两个方法

if(it.menuItemIcon.drawable!=null){
                          val bitmap = getBitMap(it.menuItemIcon)
                          setBitmapAndTint(bitmap,holder.itemView.context,it.menuItemIcon,itemData.isSelected)
                      }

Step-3实现 getBitMap() 从 ImageView 对象获取 Bitmap

 private fun getBitMap(view: AppCompatImageView): Bitmap {
    val returnedBitmap = Bitmap.createBitmap(view.width, view.height, Bitmap.Config.ARGB_8888)
    val canvas = Canvas(returnedBitmap)
    val bgDrawable: Drawable = view.drawable
    bgDrawable.draw(canvas)
    view.draw(canvas)
    return returnedBitmap
}

Step-4现在实现 setBitmapAndTint() 在 imageView 中设置位图和 colorFilter(Tint)

 private fun setBitmapAndTint(bitmap: Bitmap, context: Context, menuItemIcon: AppCompatImageView, selected: Boolean) {
    menuItemIcon.setImageBitmap(bitmap)
    menuItemIcon.setColorFilter(ContextCompat.getColor(context,R.color.ColorBlack))
}