android 圓角ImageView類，可設定弧度，androidimageview

android 圓角ImageView類，可設定弧度，androidimageview

public class RoundImageView extends ImageView {    private Paint paint;    private int roundWidth = 50;    private int roundHeight = 50;    private Paint paint2;    public RoundImageView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        init(context, attrs);    }    public RoundImageView(Context context, AttributeSet attrs) {        super(context, attrs);        init(context, attrs);    }    public void SetRoundValue(float roundValue) {        roundWidth = (int) roundValue;        roundHeight = (int) roundValue;    }    public RoundImageView(Context context) {        super(context);        init(context, null);    }    @SuppressLint("Recycle")    private void init(Context context, AttributeSet attrs) {        if (attrs != null) {            TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundAngleImageView);            roundWidth = a.getDimensionPixelSize(R.styleable.RoundAngleImageView_roundWidth, roundWidth);            roundHeight = a.getDimensionPixelSize(R.styleable.RoundAngleImageView_roundHeight, roundHeight);        } else {            float density = context.getResources().getDisplayMetrics().density;            roundWidth = (int) (roundWidth * density);            roundHeight = (int) (roundHeight * density);        }        paint = new Paint();        paint.setColor(Color.WHITE);        paint.setAntiAlias(true);        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));        paint2 = new Paint();        paint2.setXfermode(null);    }    @Override    public void draw(Canvas canvas) {        Bitmap bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Config.ARGB_8888);        Canvas canvas2 = new Canvas(bitmap);        super.draw(canvas2);        drawLiftUp(canvas2);        drawRightUp(canvas2);        drawLiftDown(canvas2);        drawRightDown(canvas2);        canvas.drawBitmap(bitmap, 0, 0, paint2);        bitmap.recycle();        bitmap = null;    }    private void drawLiftUp(Canvas canvas) {        Path path = new Path();        path.moveTo(0, roundHeight);        path.lineTo(0, 0);        path.lineTo(roundWidth, 0);        path.arcTo(new RectF(0, 0, roundWidth * 2, roundHeight * 2), -90, -90);        path.close();        canvas.drawPath(path, paint);    }    private void drawLiftDown(Canvas canvas) {        Path path = new Path();        path.moveTo(0, getHeight() - roundHeight);        path.lineTo(0, getHeight());        path.lineTo(roundWidth, getHeight());        path.arcTo(new RectF(0, getHeight() - roundHeight * 2, 0 + roundWidth * 2, getWidth()), 90, 90);        path.close();        canvas.drawPath(path, paint);    }    private void drawRightDown(Canvas canvas) {        Path path = new Path();        path.moveTo(getWidth() - roundWidth, getHeight());        path.lineTo(getWidth(), getHeight());        path.lineTo(getWidth(), getHeight() - roundHeight);        path.arcTo(new RectF(getWidth() - roundWidth * 2, getHeight() - roundHeight * 2, getWidth(), getHeight()), 0,                90);        path.close();        canvas.drawPath(path, paint);    }    private void drawRightUp(Canvas canvas) {        Path path = new Path();        path.moveTo(getWidth(), roundHeight);        path.lineTo(getWidth(), 0);        path.lineTo(getWidth() - roundWidth, 0);        path.arcTo(new RectF(getWidth() - roundWidth * 2, 0, getWidth(), 0 + roundHeight * 2), -90, 90);        path.close();        canvas.drawPath(path, paint);    }}