This tutorial will teach you how to make make a Currency Converter app Using Android Studio step by step.it will help you convert the currency easily.
We made the layout design in activity_main.xml
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:gravity="center"
android:orientation="vertical"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Currency Converter"
android:textSize="30sp"
/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<EditText
android:id="@+id/txtuname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Enter the Username"
/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<EditText
android:id="@+id/txt"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Messgae"
/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="@+id/btn1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@color/colorAccent"
android:text="ADD"
/>
</LinearLayout>
</LinearLayout>MainActivity
package com.example.kobinath.currency;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
Spinner sp1,sp2;
EditText ed1;
Button b1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sp1 = findViewById(R.id.spfrom);
sp2 = findViewById(R.id.spto);
ed1 = findViewById(R.id.txtamt);
String[] from = {"USD"};
ArrayAdapter ad = new ArrayAdapter<String>(this,R.layout.support_simple_spinner_dropdown_item,from);
sp1.setAdapter(ad);
String[] to = {"Indian Rupees","Srilankan Rupees"};
ArrayAdapter ad1 = new ArrayAdapter<String>(this,R.layout.support_simple_spinner_dropdown_item,to);
sp2.setAdapter(ad1);
b1 = findViewById(R.id.btn1);
b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Double tot;
Double amt = Double.parseDouble(ed1.getText().toString());
if(sp1.getSelectedItem().toString() == "USD" && sp2.getSelectedItem().toString() == "Indian Rupees")
{
tot = amt * 70.0;
Toast.makeText(getApplicationContext(),tot.toString(),Toast.LENGTH_LONG).show();
}
else if(sp1.getSelectedItem().toString() == "USD" && sp2.getSelectedItem().toString() == "Srilankan Rupees")
{
tot = amt * 179.0;
Toast.makeText(getApplicationContext(),tot.toString(),Toast.LENGTH_LONG).show();
}
}
});
}
}
I have attached the video tutorial below it will help you to do this step by step.
