How do I add a second button android?

Question

I´ve got a click listener to an email intent in my app, but I want to add a second button to do another thing? Sorry for the dum question, Im a begginer.

For the peoplew

Answer 1

First define your button variables in your activity/fragment

Button button1;
Button button2;

In the onCreate (activity) or onCreateView (fragment) method, link the button objects to the buttons in your layout, and set their onClickListeners:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    button1= (Button) findViewById(R.id.button1);
    button1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            //do something
        }
    });
    button2 = (Button) findViewById(R.id.button2);
    button2.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            //do something else
        }
    });
}

Your layout file should then have something like this:

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/button1" />

<Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/button2" />    

Answer 2

In the onCreate() you can find your buttons by their id in the your layout XML file, and then add onClickListener to it.

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.yourLayout); 

    button1 = (Button)findViewById(R.id.b1);
    button1.setOnClickListener(this);

    button2 = (Button)findViewById(R.id.b2);
    button2.setOnClickListener(this);


}

Once you have initialized your buttons you can then use one onClick() method to handle the button clicks, This can be done for many buttons doing different things by using the if statements where arg0 is the name you assigned to the button.

public void onClick(View arg0) {
if(arg0 == button1){
    //Do Something
}
if(arg0 == button2){
  //Do something
}
}