scan Now or Generate Now QR Code button?

Question

So, I want a button like this in my app:

I don't know how to add code for button in the android-studio, and I only have the scanner code. I don't know how to put 2 function in the same project. What should I do? Can someone help me?

Answer 1

It sounds like you need to add a function to handle the OnClick event. The Android documentation has a nice example on how to set and OnClick listener:

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

public class MyActivity extends Activity {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.content_layout_id);

        final Button button = findViewById(R.id.button_id);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                // Code here executes on main thread after user presses button
                // This should be where you add your button logic.
            }
        });
     }
}