How to make a simple voting app in Android studio

 Hello Guys,

Here I am going to discuss about simple use of button in android .How to use button in android.Basically I have used these button as social media voting button just to create a real life example.

             

  

Xml file:-

             <?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button2"
        android:layout_width="103dp"
        android:layout_height="88dp"
        android:background="#FF4B33 "
        android:onClick="youtube"
        android:text="YouTube"
        android:textColor="@android:color/white"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/button"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.499" />

    <Button
        android:id="@+id/button"
        android:layout_width="103dp"

        android:layout_height="88dp"
        android:background="#33A6FF"
        android:onClick="facebook"
        android:text="facebbok"
        android:textColor="@android:color/white"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/button2"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.499" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="f_score"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/textView2"
        app:layout_constraintTop_toBottomOf="@+id/button"
        app:layout_constraintVertical_bias="0.082" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Y_score"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/textView"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button2"
        app:layout_constraintVertical_bias="0.082" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        android:onClick="reset"
        android:text="Reset "

        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        tools:layout_editor_absoluteY="491dp" />


</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java:-

 package abhishekraj.example.smediaupvote;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    int f_score =0;
    int y_score =0;

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



    }



        public void facebook(View view){
           f_score = f_score +1;

           display(f_score);
        }
    public void youtube(View view){
        y_score = y_score +1;

        display1(y_score);
    }

    public void display(int name){
        TextView txt = (TextView) findViewById(R.id.textView);
        txt.setText(""+name);



    }
    public void display1(int nameis){
        TextView txt1 = (TextView) findViewById(R.id.textView2);
        txt1.setText(""+nameis);
    }


    public void reset(View v){
        int f_score =0;
        int y_score =0;

        display(0);
        display1(0);

    }


    }

Note:-

Here I am declare f_score and y_score as global variable because these variable retain the value i.e f_score and y_score don't initialise with zero .