button text android code example

Example 1: set button text android

Button mButton = (Button)your_view_object.findViewById(R.id.contact);
mButton.setText("number");

Example 2: android java buttons

public void clickFunction(View view)
/* Text attributes + onClick (in this case: clickFunction)
Basics: Constraint list / layout margin */

Example 3: xml button

<androidx.appcompat.widget.AppCompatButton