Android 自定义圆角图片的ImageView

最新推荐文章于 2021-05-27 21:23:48 发布

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最新推荐文章于 2021-05-27 21:23:48 发布 · 223 阅读

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#android

本文记录了在Android中创建自定义圆角图片ImageView的方法，包括自定义类的实现和在styles文件中添加样式，使得在布局文件中就能轻松设置图片的圆角大小。

每次写圆角都要去网上找，在这里做个记录：圆角的imageview

/**
 * 圆角的ImageView
 */
public class MyCircleImageView extends AppCompatImageView {
    private float topLeftRadius;
    private float topRightRadius;
    private float bottomLeftRadius;
    private float bottomRightRadius;
    private boolean isCircle = true;
    private float defRadius = 0;

    private Paint roundPaint;
    private Paint imagePaint;
    private int borderColor;
    private float borderWidth;
    private Paint borderPaint;

    public MyCircleImageView(Context context) {
        this(context, null);
    }

    public MyCircleImageView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public MyCircleImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        super.setScaleType(ScaleType.CENTER_CROP);
        if (attrs != null) {
            TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.MyCircleImageView);
            float radius = ta.getDimension(R.styleable.MyCircleImageView_radius, 0);
            topLeftRadius = ta.getDimension(R.styleable.MyCircleImageView_topLeftRadius, radius);
            topRightRadius = ta.getDimension(R.styleable.MyCircleImageView_topRightRadius, radius);
            bottomLeftRadius = ta.getDimension(R.styleable.MyCircleImageView_bottomLeftRadius, radius);
            bottomRightRadius = ta.getDimension(R.styleable.MyCircleImageView_bottomRightRadius, radius);
            isCircle = ta.getBoolean(R.styleable.MyCircleImageView_isCircle, true);
            borderColor = ta.getColor(R.styleable.MyCircleImageView_circleBorderColor, Color.WHITE);
            borderWidth = ta.getDimension(R.styleable.MyCircleImageView_circleBorderWidth, 0);
            ta.recycle();
        }
        roundPaint = new Paint();
        roundPaint.setColor(Color.WHITE);
        roundPaint.setAntiAlias(true);
        roundPaint.setDither(true);
        roundPaint.setStyle(Paint.Style.FILL);
        roundPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));

        imagePaint = new Paint();
        imagePaint.setXfermode(null);

        if (borderWidth > 0) {
            setBorderPaint();
        }
    }

    private void setBorderPaint() {
        if (borderPaint == null){
            borderPaint = new Paint();
            borderPaint.setColor(borderColor);
            borderPaint.setAntiAlias(true);
            borderPaint.setDither(true);
            borderPaint.setStyle(Paint.Style.FILL);
            borderPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_ATOP));