Generate random number in android

Generate random number in Android

To generate random number in Android, class java.util.Random can be used.

This class java.util.Random provides methods that generates pseudo-random numbers of different types, such as int, long, double, and float.

It support two public constructor:
Random() - Construct a random generator with the current time of day in milliseconds as the initial state.
Random(long seed) - Construct a random generator with the given seed as the initial state.



main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
<TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="@string/hello"
  />
<Button
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="Generate Random number"
  android:id="@+id/generate"
/>
<TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:id="@+id/generatenumber"
/>
</LinearLayout>

AndroidRandom.java

package com.exercise.AndroidRandom;

import java.util.Random;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class AndroidRandom extends Activity {
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
    
      final Random myRandom = new Random();
    
      Button buttonGenerate = (Button)findViewById(R.id.generate);
      final TextView textGenerateNumber = (TextView)findViewById(R.id.generatenumber);
    
      buttonGenerate.setOnClickListener(new OnClickListener(){

  @Override
  public void onClick(View v) {
   // TODO Auto-generated method stub
   textGenerateNumber.setText(String.valueOf(myRandom.nextInt()));
  }});
  }
}