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POHow to add a class extending view to current class view
 

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  1. POHow to add a class extending view to current class view
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    <p>I have a class Drawview:</p> <pre><code>public class DrawView extends View { private ColorBall[] colorballs = new ColorBall[3]; // array that holds the balls private int balID = 0; // variable to know what ball is being dragged public DrawView(Context context) { super(context); setFocusable(true); //necessary for getting the touch events // setting the start point for the balls Point point1 = new Point(); point1.x = 50; point1.y = 20; Point point2 = new Point(); point2.x = 100; point2.y = 20; Point point3 = new Point(); point3.x = 150; point3.y = 20; // declare each ball with the ColorBall class colorballs[0] = new ColorBall(context,R.drawable.bol_groen, point1); colorballs[1] = new ColorBall(context,R.drawable.bol_rood, point2); colorballs[2] = new ColorBall(context,R.drawable.bol_blauw, point3); } } </code></pre> <p>And my current class is:</p> <pre><code>public class Quiz1 extends Activity{ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.e); AbsoluteLayout l= (AbsoluteLayout)findViewById(R.id.ll); DrawView d=new DrawView(this); l.addView(d); } } </code></pre> <p>I am trying to add that DrawView class but its not getting added as a child view of Absolutelayout of my current class view.its executing without any error but i am not able to see Drawview class objects. And when i am doing this:</p> <pre><code> public class Quiz1 extends Activity{ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.e); AbsoluteLayout l= (AbsoluteLayout)findViewById(R.id.ll); DrawView d=new DrawView(this); l.addView(d); } } </code></pre> <p>I am getting NullPointerException it means its not renderring the Drawview View.So bottom line is how to add a class extending a View to current view. Please help me..thanx</p>
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    1. This table or related slice is empty.
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    1. USGaurav Chawla
    1. USGaurav Chawla
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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