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PODetecting if a MouseEvent from onTouch is inside a circle drawn to the canvas of a custom view.
 

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    <p>I'm trying to start with an android application and before that I have a need to do the following thing : I have a class extending from the View class and Implementing the View.onTouchListener interface. Now, I have drawn a circle in the onDraw() method so that the circle appears on the start of the application. Now, I would want to do something when the user touches(Actually clicks) the circle. So, the first thing I'm trying to do here is to display a toast msg on the touch of the circle. I tried using the following code but nothing happened. Pls help me find a solution.</p> <p>This is the View class : </p> <pre><code> package com.exam.trial; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.view.MotionEvent; import android.view.View; import android.widget.Toast; public class pad extends View implements View.OnTouchListener{ Paint paint; public pad(Context context) { super(context); // TODO Auto-generated constructor stub paint = new Paint(); } public boolean onTouch(View v, MotionEvent event) { switch(event.getAction()){ case MotionEvent.ACTION_DOWN: { if (event.getX()&gt;70 &amp;&amp; event.getX()&lt;130 &amp;&amp; event.getY()&gt;70 &amp;&amp; event.getY()&lt;130) { Toast toast = Toast.makeText(getContext(), "Works fine", Toast.LENGTH_SHORT); toast.show(); } return true; } } return false; } @Override public void onDraw(Canvas canvas) { paint.setColor(Color.YELLOW); canvas.drawCircle(100, 100, 50, paint); } } </code></pre> <p>And here is my starting activity : </p> <pre><code>package com.exam.trial; import android.app.Activity; import android.os.Bundle; public class TrialActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); pad p = new pad(this); setContentView(p); } } </code></pre>
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    1. COtry this link http://stackoverflow.com/questions/4207067/how-to-implement-touch-listener-on-image
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