Ruby Ruby - 13 days ago 6
Android Question

How to draw an arrow using android graphic class?

How can i draw an arrow using the graphics class?

Im using android graphics class and basically im trying to show a path on a map. So i need to print an arrow head on the canvas. Help me to figure out!

Thank you!

This is one of the methods i have used to draw a line. i want to print an arrow head on the edge of each and every line.

// ArrayList<Point> ArrayListPoints = new ArrayList<Point>(); // Assign the shortest path here

// ArrayListPoints.add(new Point(262,100));
// ArrayListPoints.add(new Point(262,165));
// ArrayListPoints.add(new Point(346,165));
// ArrayListPoints.add(new Point(420,165));

ArrayList<Point> ArrayListPointsFINAL;

ArrayListPointsFINAL = storePath.ArrayListPoints;

if(ArrayListPointsFINAL == null){
System.out.println("ArrayListPointsFINAL is NULL");
}
else{

ArrayList<Float> ArrayList_X = new ArrayList<Float>();
ArrayList<Float> ArrayList_Y = new ArrayList<Float>();
//int size = get.ArrayListPoints.size();

for(int i=0; i<ArrayListPointsFINAL.size(); i++){
ArrayList_X.add(Float.parseFloat(String.valueOf(ArrayListPointsFINAL.get(i).x)));
ArrayList_Y.add(Float.parseFloat(String.valueOf(ArrayListPointsFINAL.get(i).y)));
}

for(int i=1; i<ArrayList_X.size(); i++){
Paint myPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
myPaint.setStrokeWidth(8/*1 /getResources().getDisplayMetrics().density*/);
myPaint.setColor(0xffff0000); //color.RED
// myPaint.setStyle(myPaint);

canvas.drawLine(ArrayList_X.get(i), ArrayList_Y.get(i), ArrayList_X.get(i-1), ArrayList_Y.get(i-1),myPaint);

}

Answer

You can draw a Bitmap instead and apply a matrix to it.