I have a question, I can use view to know which button was used, I'm setting up a calculator and to save code I want to use a single method that can be used by all the numeric buttons, but to do that, I first have to know which button was pressed, I know it should be with view
public void bunton(View view){
String boton=view //quiero saber que boton me presiono
}
It's what you say. When you create the button, you do it through an ID, when you send it to the -one function- you recover it using the same ID, in this case through the getId () function of each View.
We create the listener:
View.OnClickListener onClickListener = new View.OnClickListener() {
@Override
public void onClick(View view) {
pressed(view);
}
};
We add it to the buttons:
v.findViewById(R.id.boton_sumar).setOnClickListener(onClickListener);
v.findViewById(R.id.boton_restar).setOnClickListener(onClickListener);
//...y el resto de botones.
And in the function:
private void pressed(View view){
switch(view.getId()){
case R.id.boton_sumar:
//Lo que sea para sumar...
break;
case R.id.boton_restar:
//Lo que sea para restar...
break;
case R.id.etc:
break;
}
}
There is something simpler and it is to put in your xml, within the view you want to capture, a parameter that is android:onClick="nombre_funcion" .
<View
android:id="@+id/num_11"
android:layout_width="30dp"
android:layout_height="30dp"
android:clickable="true"
android:onClick="activateNum">
And in your activity you only create the following function:
public void activateNum(View v)
{
switch(v.getId)
{
case R.id.boton_sumar:
//Operación suma...
break;
case R.id.boton_restar:
//Operación resta...
break;
case R.id.multiplicar:
//Operación multiplicar...
break;
}
}
It's the simplest thing and where less code you write.
Maybe you could try returning the button:
public string Button(View view)
{
Strig boton = view;
return boton;
}