Part-1 - Create a custom ui.
Drawing curved lines.
The recent project i was working on had curved shape filled with some background color. Though i was given a image(.png) of the shape, i wanted to draw it on canvas. So i decided to give it a try.
curved_line_image_given
I decided to draw the following shape to make it more generic.
curved_line_image_i_draw
Steps i followed.
1. create a class CurvedLineView which extends View.
public class CurvedLineView extends View {
}
2. Override the constructors. And read the attributes from xml.
public CurvedLineView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mActivity = (Activity) context;
}
3. Create a init() method, and initialize all the required and known values.
private void init(){
linePaint = new Paint();
linePaint.setColor(fillColor);
linePaint.setStyle(Paint.Style.STROKE);
linePaint.setStrokeWidth(5);
linePaint.setAntiAlias(true);
fillPaint = new Paint();
fillPaint.setColor(fillColor);
fillPaint.setStyle(Paint.Style.FILL);
upperPathPaint = new Paint();
upperPathPaint.setColor(upperFillColor);
upperPathPaint.setStyle(Paint.Style.FILL);
lowerPathPaint = new Paint();
lowerPathPaint.setColor(lowerFillColor);
lowerPathPaint.setStyle(Paint.Style.FILL);
}
4. Draw the line and paths.
5. color the required area.
