java - 改变资源的颜色

Question

我有一个资源 png of a house如果您想查看它，请链接。它基本上只是一个黑色的主页按钮。

我将它作为可绘制的图像 Assets 包含并导入。

我试图将其设置为按钮，但通过编程将其更改为白色。

这是我尝试将颜色更改为白色的方法:

        ImageButton txtbtnAccept = new ImageButton(this);
        this._surveyHomeButton = txtbtnAccept;
        txtbtnAccept.setId(this.generateViewId());
        txtbtnAccept.setLayoutParams(new RelativeLayout.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
        layoutParams = (RelativeLayout.LayoutParams) txtbtnAccept.getLayoutParams();
        layoutParams.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);
        layoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);
        layoutParams.height = 200;
        layoutParams.width = 200;
        txtbtnAccept.setScaleType(ImageView.ScaleType.FIT_CENTER);
        txtbtnAccept.setAdjustViewBounds(true);

        txtbtnAccept.setLayoutParams(layoutParams);

        txtbtnAccept.setBackgroundResource(0);
        txtbtnAccept.setVisibility(View.GONE);

        Bitmap homeImage = BitmapFactory.decodeResource(getResources(), R.drawable.ic_action_home);
        Drawable whiteImg = new BitmapDrawable(getResources(), homeImage);

        whiteImg.setColorFilter(Color.WHITE, PorterDuff.Mode.MULTIPLY);
        txtbtnAccept.setImageDrawable(whiteImg);
        txtbtnAccept.setImageBitmap(homeImage);

知道我哪里出错了吗？

Answer 1

你想要的是所谓的着色。看看DrawableCompat.setTint(Drawable, int) .