IN ANDROID FINDING WHICH BUTTON IS CLICKED

This post helps you to learner about listening to click events in android

1.Create two buttons using XML file under /res/layout
2.I named two buttons as sendBtn and cancelBtn
3.Make buttons to listen to click events by following code


public class CreateMessage extends Activity implements OnClickListener
{
public void onCreate(Bundle savedInstanceState) 
{
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
          Button sendBtn=(Button)findViewById(R.id.sendMsg);
          sendBtn.setOnClickListener(this);
           Button cancelBtn=(Button)findViewById(R.id.cancelMsg);
           cancelBtn.setOnClickListener(this);
       }
}
4.Using getId() find which button is clicked


public void onClick(View v)
    {
    Button clickedButton=(Button)v;
    switch(clickedButton.getId())
    {
    case R.id.sendMsg:
    Toast.makeText(this, "Message Sent",50).show(); //it displays a message
    break;
    case R.id.cancelMsg:
    finish(); //it closes current activity
    break;
    default:
    throw new RuntimeException("Unknow button ID");
   
    }
    }


NOTE: Include these header files import android.view.View;
import android.view.View.OnClickListener;