如何在app中设置渐变颜色：CollapsingToolbarLayout的contentScrim

Question

我尝试在CollapsingToolbarLayout的contentScrim中设置渐变颜色，但只需要简单的颜色

尝试使用这样的位图，但通过IllegalArgumentException: Bitmap is not valid

Bitmap bitmap = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.bar_bg);
    Palette.from(bitmap).generate(new Palette.PaletteAsyncListener() {
                @Override
                public void onGenerated(Palette palette) {
                    Palette.Swatch vibrant =
                            palette.getVibrantSwatch();
                    int mutedColor = palette.getVibrantSwatch().getRgb();
                    if (vibrant != null) {
                        // If we have a vibrant color
                        // update the title TextView
                        collapsingToolbarLayout.setBackgroundColor(mutedColor);
                        //  mutedColor = palette.getMutedColor(R.attr.colorPrimary);
                        collapsingToolbarLayout.setStatusBarScrimColor(palette.getDarkMutedColor(mutedColor));
                        collapsingToolbarLayout.setContentScrimColor(palette.getMutedColor(mutedColor));

                    }
                }
            });

Answer 1

试试这个：

Palette.from(bitmap).generate(new Palette.PaletteAsyncListener() {


        public void onGenerated(Palette palette) {
            Palette.Swatch vibrantSwatch = palette.getVibrantSwatch();

            collapsingToolbarLayout.setContentScrimColor(palette.getMutedColor(vibrantSwatch.getRgb()));
            collapsingToolbarLayout.setStatusBarScrimColor(palette.getMutedColor(vibrantSwatch.getRgb()));

        }
    });