Convert string into double in Java Android example

How to change string variable data type into double data type and show using TextView with example.

In this tutorial we are simply converting string data type value into double and show on screen using textview. So here is the complete step by step tutorial for Convert string into double in Java Android example.

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How to Convert string into double in Java Android example.

Code for MainActivity.java file.

 package com.convertstringintodouble_android_examples.com;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;


public class MainActivity extends Activity {

 TextView textview1,textview2;
 
 //Initializing string variable.
 String value = "27.77" ;
 
 //Initializing double variable.
 double DoubleData ;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 
 textview1 = (TextView)findViewById(R.id.textView1);
 textview2 = (TextView)findViewById(R.id.textView2);
 
 //Converting string variable to double.
 DoubleData = Double.valueOf(value);
 
 //Showing string on TextView.
 textview1.setText("String = " + value);
 
 //printing double on screen.
 
 textview2.setText("double = " + DoubleData);
 
 }
}

Code for activity_main.xml layout file.

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:paddingBottom="@dimen/activity_vertical_margin"
 android:paddingLeft="@dimen/activity_horizontal_margin"
 android:paddingRight="@dimen/activity_horizontal_margin"
 android:paddingTop="@dimen/activity_vertical_margin"
 tools:context="com.convertstringintodouble_android_examples.com.MainActivity" >

 <TextView
 android:id="@+id/textView1"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignParentTop="true"
 android:layout_centerHorizontal="true"
 android:text="String"
 android:gravity="center"
 android:textAppearance="?android:attr/textAppearanceLarge" />

 <TextView
 android:id="@+id/textView2"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_below="@+id/textView1"
 android:layout_centerHorizontal="true"
 android:layout_marginTop="40dp"
 android:text="Double"
 android:gravity="center"
 android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>

Screenshot:

Convert string into double in Java Android example

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