I have multiple buttons in an Android app. I want to know, in the Java code, which button was clicked. As far as I can tell, this is accomplished with a single method like this:
public void onClick(View view) {
// Do something
}
And inside that method, you have to figure out which button was clicked. Is that correct?
If so, how do I tell which was clicked? I do have the various Button objects returned by findViewById(). I just don't know how to use them to tell which button was clicked.
Implement View's OnClickListner in your activity class. Override on click method.
Button b1= (Button) findViewById(R.id.button1);
//find your button id defined in your xml.
b1.setOnClickListener(this);
// You have button OnClickListener implemented in your activity class.
//this refers to your activity context.
I have used a toast message.
http://developer.android.com/guide/topics/ui/notifiers/toasts.html
Toast.makeText(MainActivity.this,"button1", 1000).show();
//display a toast using activity context ,text and duration
Using switch case you can check which button is clicked.
In your onClick method.
switch(v.getId()) //get the id of the view clicked. (in this case button)
{
case R.id.button1 : // if its button1
//do something
break;
}
Here's the complete code.
public class MainActivity extends Activity implements OnClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b1= (Button) findViewById(R.id.button1);
Button b2= (Button) findViewById(R.id.button2);
Button b3= (Button) findViewById(R.id.button3);
b1.setOnClickListener(this);
b2.setOnClickListener(this);
b3.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId())
{
case R.id.button1 :
Toast.makeText(MainActivity.this,"button1", 1000).show();
break;
case R.id.button2 :
Toast.makeText(MainActivity.this,"button2", 1000).show();
break;
case R.id.button3 :
Toast.makeText(MainActivity.this,"button3", 1000).show();
break;
}
}
}
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