要实现ImageView的自定义形状裁剪,可以通过创建一个自定义的Drawable来实现。以下是一个简单的示例代码:
public class CustomShapeDrawable extends Drawable {
private Path mPath;
private Paint mPaint;
public CustomShapeDrawable() {
mPath = new Path();
mPaint = new Paint();
mPaint.setColor(Color.BLACK);
mPaint.setStyle(Paint.Style.FILL);
}
@Override
public void draw(Canvas canvas) {
canvas.drawPath(mPath, mPaint);
}
@Override
public void setBounds(int left, int top, int right, int bottom) {
super.setBounds(left, top, right, bottom);
mPath.reset();
mPath.addCircle(getBounds().width() / 2, getBounds().height() / 2, Math.min(getBounds().width(), getBounds().height()) / 2, Path.Direction.CW);
}
@Override
public void setAlpha(int alpha) {
mPaint.setAlpha(alpha);
}
@Override
public void setColorFilter(ColorFilter colorFilter) {
mPaint.setColorFilter(colorFilter);
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
}
ImageView imageView = findViewById(R.id.imageView);
CustomShapeDrawable customShapeDrawable = new CustomShapeDrawable();
imageView.setImageDrawable(customShapeDrawable);
通过上述步骤,我们可以实现ImageView的自定义形状裁剪。在CustomShapeDrawable类中,我们可以根据需要定义不同的形状裁剪,如圆形、椭圆形、三角形等。
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