Question

How to set and center a Button on Activity screen in Android Java

Answer 1

package com.example.avi.myapplication;

import android.app.Activity;
import android.os.Bundle;
import android.widget.RelativeLayout;
import android.widget.Button;
import android.graphics.Color;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        RelativeLayout myLayout = new RelativeLayout(this);
        Button myButton = new Button(this);


        myLayout.setBackgroundColor(Color.BLUE);

        myButton.setBackgroundColor(Color.GREEN);
        myButton.setText("Login");

        RelativeLayout.LayoutParams buttonParams =
                       new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
                                                       RelativeLayout.LayoutParams.WRAP_CONTENT);
        
        buttonParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
        buttonParams.addRule(RelativeLayout.CENTER_VERTICAL);

        myLayout.addView(myButton, buttonParams);

        setContentView(myLayout);
    }
}

 

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