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public class CustomRoundAngleImageView extends AppCompatImageView {
float width, height;
public CustomRoundAngleImageView(Context context) {
this(context, null);
init(context, null);
}
public CustomRoundAngleImageView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
init(context, attrs);
}
public CustomRoundAngleImageView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
if (Build.VERSION.SDK_INT < 18) {
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
width = getWidth();
height = getHeight();
}
@Override
protected void onDraw(Canvas canvas) {
if (width >= 12 && height > 12) {
Path path = new Path();
//四个圆角
path.moveTo(12, 0);
path.lineTo(width - 12, 0);
path.quadTo(width, 0, width, 12);
path.lineTo(width, height - 12);
path.quadTo(width, height, width - 12, height);
path.lineTo(12, height);
path.quadTo(0, height, 0, height - 12);
path.lineTo(0, 12);
path.quadTo(0, 0, 12, 0);
canvas.clipPath(path);
}
super.onDraw(canvas);
}
}
本文介绍了如何在Android中为ImageView设置圆角效果,适用于希望为应用中的图片展示添加个性化设计的开发者。
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