Delegate setBackgroundDrawable to setWindowDrawable

    @Override

    public void setBackgroundDrawable(Drawable background) {

        // TODO: This should route through setWindowBackground, but late in the release to make this

        // change.

        if (mOriginalBackgroundDrawable != background) {

            mOriginalBackgroundDrawable = background;

            updateBackgroundDrawable();

            drawableChanged();

        }

        setWindowBackground(background);

    }

    public void setWindowFrame(Drawable drawable) {

/*

 * Copyright (C) 2019 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 com.android.internal.policy;

import static com.google.common.truth.Truth.assertThat;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.drawable.Drawable;

import androidx.test.platform.app.InstrumentationRegistry;

import com.android.frameworks.coretests.R;

import org.junit.Before;

import org.junit.Test;

import java.util.Arrays;

public class DecorViewTest {

    private Context mContext;

    private DecorView mDecorView;

    @Before

    public void setUp() {

        mContext = InstrumentationRegistry.getInstrumentation().getContext();

        PhoneWindow phoneWindow = new PhoneWindow(mContext);

        mDecorView = (DecorView) phoneWindow.getDecorView();

    }

    @Test

    public void setBackgroundDrawableSameAsSetWindowBackground() {

        Drawable bitmapDrawable = mContext.getResources()

                .getDrawable(R.drawable.test16x12, mContext.getTheme());

        int w = 16;

        int h = 12;

        Bitmap expectedBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);

        mDecorView.setWindowBackground(bitmapDrawable);

        Canvas testCanvas = new Canvas(expectedBitmap);

        mDecorView.draw(testCanvas);

        testCanvas.release();

        Drawable expectedBackground = mDecorView.getBackground();

        mDecorView.setBackgroundDrawable(bitmapDrawable);

        Bitmap resultBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);

        Canvas resCanvas = new Canvas(resultBitmap);

        mDecorView.draw(resCanvas);

        resCanvas.release();

        // Check that the drawable is the same.

        assertThat(mDecorView.getBackground()).isEqualTo(expectedBackground);

        assertThat(mDecorView.getBackground()).isEqualTo(bitmapDrawable);

        // Check that canvas is the same.

        int[] expPixels = new int[w * h];

        int[] resPixels = new int[w * h];

        resultBitmap.getPixels(resPixels, 0, w, 0, 0, w, h);

        expectedBitmap.getPixels(expPixels, 0, w, 0, 0, w, h);

        assertThat(Arrays.toString(expPixels)).isEqualTo(Arrays.toString(resPixels));

    }

}