How to add a button dynamically in Android?

Question

How to add a button dynamically in Android?

Answer 1

You could create a base layout for your button and dynamically change only what is specific, like this project I made to run different exercises from a Material Design course I'm taking:

In this example, I use a preconfigured AppCompatButton:

layout_base_button.xml

And in the MainActivity I created some instances and changed what I need, like the button text and onClick event:

    

    






public class MainActivity extends AppCompatActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        LinearLayout baseLayout = findViewById(R.id.base_layout);

        baseLayout.addView(createButton("TextFields", baseLayout,
                view -> startActivity(createIntent(TextFieldsActivity.class))
        ));

        baseLayout.addView(createButton("Buttons", baseLayout,
                view -> startActivity(createIntent(ButtonsActivity.class))
        ));

        baseLayout.addView(createButton("Toolbar", baseLayout,
                view -> startActivity(createIntent(ToolbarActivity.class))
        ));

    }

    private View createButton(String text, LinearLayout baseLayout, View.OnClickListener onClickEvent) {
        View inflated = LayoutInflater.from(this).inflate(R.layout.layout_base_button, baseLayout, false);
        AppCompatButton btnBase = inflated.findViewById(R.id.btn_base);

        btnBase.setText(text);
        btnBase.setOnClickListener(onClickEvent);
        return btnBase;
    }

    private Intent createIntent(Class cls) {
        return new Intent(this, cls);
    }
}

Sorry for being late...