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copied!<p>For this to work you need to have a reference of those views inside your custom views classes. Something like this in <code>CustomView1</code> (same logic is applied for <code>CustomView2</code>):</p> <pre><code>public class CustomView1 extends View { byte[] bytearray = new byte[200]; private CustomView2 view2; public CustomView1(Context context, AttributeSet attrs) { super(context, attrs); } public void setCustomView2(CustomView2 view2) { this.view2 = view2; } @override onDraw() { if(view2 != null) //If view2 is not already set, we do not want a null pointer exception to occur { view2.invalidate(); } } } </code></pre> <p>To use it, you need something like this:</p> <pre><code>public class TestApp extends Activity { CustomView1 view1 ; CustomView2 view2 ; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); view1 = (CustomView1) findViewbyId(R.id.CustomViewID1); view2 = (CustomView2) findViewbyID(R.id.CustomViewID2); view1.setCustomView2(view2); view2.setCustomView1(view1); } } </code></pre> <p><strong>EDIT:</strong> You can create another custom constructor for your <code>CustomView1</code> class in addition to the one you already have. Something like this:</p> <pre><code>public CustomView1(Context context) { super(context); } </code></pre> <p>This way you avoid passing a null <code>AttributeSet</code> to your view and you call your custom view like this: <code>CustomView1 view1 = new CustomView1(context)</code>. </p> <p>The <code>public CustomView1(Context context, AttributeSet attrs)</code> constructor is used to handle the situation that you declare you custom view through a layout xml file and not programmatically. You will need to set the layout properties of your view programmatically that way. Check <a href="http://startandroid.ru/en/lessons/complete-list/220-lesson-16-creating-layout-programmatically-layoutparams.html" rel="nofollow">this</a> for help in doing so.</p>

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