Workaround for broken BitmapShader in AdaptiveIconDrawable

/*

 * Copyright (C) 2017 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package android.graphics.drawable;

import com.android.tools.layoutlib.annotations.LayoutlibDelegate;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.PorterDuff.Mode;

import android.graphics.PorterDuffXfermode;

import android.graphics.Rect;

import android.graphics.drawable.AdaptiveIconDrawable.LayerState;

/**

 * Delegate used to provide new implementation of a select few methods of {@link

 * AdaptiveIconDrawable}

 * <p>

 * Through the layoutlib_create tool, the original  methods of AdaptiveIconDrawable have been

 * replaced by calls to methods of the same name in this delegate class.

 */

@SuppressWarnings("unused")

public class AdaptiveIconDrawable_Delegate {

    @LayoutlibDelegate

    /*package*/ static void draw(AdaptiveIconDrawable thisDrawable, Canvas canvas) {

        // This is a workaround for the broken BitmapShader in layoutlib. This new draw methods

        // avoids the use of the shader.

        for (int i = 0; i < LayerState.N_CHILDREN; i++) {

            if (thisDrawable.mLayerState.mChildren[i] == null) {

                continue;

            }

            final Drawable dr = thisDrawable.mLayerState.mChildren[i].mDrawable;

            if (dr != null) {

                dr.draw(canvas);

            }

        }

        if (thisDrawable.mMaskBitmap != null) {

            Rect bounds = thisDrawable.getBounds();

            Paint paint = new Paint();

            paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));

            canvas.drawBitmap(thisDrawable.mMaskBitmap, bounds.left, bounds.top, paint);

        }

    }

}

<?xml version="1.0" encoding="utf-8"?>

<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">

    <background android:drawable="@android:color/red" />

    <foreground android:drawable="@drawable/headset" />

</adaptive-icon>

 No newline at end of file

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

              android:padding="16dp"

              android:orientation="horizontal"

              android:layout_width="fill_parent"

              android:layout_height="fill_parent">

    <ImageView

             android:layout_height="wrap_content"

             android:layout_width="wrap_content"

             android:src="@drawable/adaptive" />

</LinearLayout>

        renderAndVerify("fonts_test.xml", "font_test.png");

    }

    @Test

    public void testAdaptiveIcon() throws ClassNotFoundException {

        // Create the layout pull parser.

        LayoutPullParser parser = createLayoutPullParser("adaptive_icon.xml");

        // Create LayoutLibCallback.

        LayoutLibTestCallback layoutLibCallback =

                new LayoutLibTestCallback(getLogger(), mDefaultClassLoader);

        layoutLibCallback.initResources();

        SessionParams params = getSessionParams(parser, ConfigGenerator.NEXUS_5,

                layoutLibCallback, "Theme.Material.NoActionBar.Fullscreen", false,

                RenderingMode.V_SCROLL, 22);

        renderAndVerify(params, "adaptive_icon.png");

    }

    @Test

    public void testColorTypedValue() throws Exception {

        // Setup