标签：android image android-drawable android-imageview

我已经有一个带有以下参数的’ImageView’：

android:layout_width="wrap_content"
android:layout_height="wrap_content"

并设置自定义Drawable：

public class HexDrawable extends Drawable {

    private Path hexagonPath;
    private float mWidth, mHeight;
    private int mBackgroundColor;
    private int mStrokeColor;
    private int mStrokeWidth;

    public HexDrawable(){
        init();
    }

    public void setBackgroundColor(int color) {
        mBackgroundColor = color;
    }

    public void setStrokeWidth(int width) {
        mStrokeWidth = width;
    }

    public void setStrokeColor(int color) {
        mStrokeColor = color;
    }

    @Override
    public int getIntrinsicHeight() {
        return 60;
    }

    @Override
    public int getIntrinsicWidth() {
        return 60;
    }

    private void init() {
        hexagonPath = new Path();
        mBackgroundColor = Color.BLUE;
        mStrokeColor = Color.GREEN;
        mStrokeWidth = 4;
    }

    private void calculatePath() {
        float p = mStrokeWidth / 2;
        float w = mWidth - 2 * p;
        float h = mHeight - 2 * p;
        float r = h / 2;
        float a = (float) (r / Math.sqrt(3));
        PointF X = new PointF(p + a + r / 2, p);
        PointF Y = new PointF(p + a + r , p);
        PointF A = new PointF(p + a, p + 0f);
        PointF B = new PointF(p + 0f, p + r);
        PointF C = new PointF(p + a, p + 2 * r);
        PointF D = new PointF(p + w - a, p + 2 * r);
        PointF E = new PointF(p + w, p + r);
        PointF F = new PointF(p + w - a, p + 0);
        hexagonPath.moveTo(Y.x, Y.y);
        hexagonPath.lineTo(A.x, A.y);
        hexagonPath.lineTo(B.x, B.y);
        hexagonPath.lineTo(C.x, C.y);
        hexagonPath.lineTo(D.x, D.y);
        hexagonPath.lineTo(E.x, E.y);
        hexagonPath.lineTo(F.x, F.y);
        hexagonPath.lineTo(X.x, X.y);
    }

    @Override
    protected void onBoundsChange(Rect bounds) {
        mWidth = bounds.width();
        mHeight = bounds.height();
        calculatePath();
    }

    @Override
    public void draw(Canvas canvas) {
        Paint paint = new Paint();
        paint.setColor(mStrokeColor);                    // set the color
        paint.setStrokeWidth(mStrokeWidth);               // set the size
        paint.setDither(true);                    // set the dither to true
        paint.setStyle(Paint.Style.STROKE);       // set to STOKE
        paint.setStrokeJoin(Paint.Join.ROUND);    // set the join to round you want
        paint.setStrokeCap(Paint.Cap.ROUND);      // set the paint cap to round too
        paint.setPathEffect(new CornerPathEffect(mStrokeWidth));   // set the path effect when they join.
        paint.setAntiAlias(true);
        canvas.drawPath(hexagonPath, paint);
        canvas.clipPath(hexagonPath, Region.Op.INTERSECT);
        canvas.drawColor(mBackgroundColor);
        canvas.drawPath(hexagonPath, paint);
        canvas.save();
    }

    @Override
    public void setAlpha(int alpha) {

    }

    @Override
    public void setColorFilter(ColorFilter colorFilter) {

    }

    @Override
    public int getOpacity() {
        return 0;
    }
}

在这种情况下,ImageView似乎使用了所有宽度.

如何正确实现Drawable与ImageView一起使用？

解决方法:

问题的根源是剪辑模式.

最好使用canvas.clipPath(hexagonPath,Region.Op.REPLACE);

此外,问题示例适用于ImageView,但经过深入调查后我没有看到,在Android 5.0及以上这个drawable用于TextView中的drawableLeft.
此外,它不需要覆盖getIntrinsicHeight

标签：android,image,android-drawable,android-imageview
来源： https://codeday.me/bug/20190519/1136063.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。