Android™

Generating Random ASCII Strings

See more PRNG Examples

Demonstrates how to generate random us-ascii strings. Android™

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    boolean success = false;

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    success = false;

    CkPrng fortuna = new CkPrng();

    boolean bDigits;
    boolean bLowercase;
    boolean bUppercase;

    // Generate random strings having only lowercase chars (a-z)
    // Disallow digits and uppercase and only allow lowercase
    bDigits = false;
    bUppercase = false;
    bLowercase = true;

    int i;

    Log.i(TAG, "-- only lowercase alpha (a-z)");
    for (i = 1; i <= 10; i++) {
        // Generate 20-character strings.
        Log.i(TAG, fortuna.randomString(20,bDigits,bLowercase,bUppercase));
        }

    // Allow both lowercase and uppercase alpha chars
    bUppercase = true;
    Log.i(TAG, "-- lower and uppercase alpha (a-zA-Z)");
    for (i = 1; i <= 10; i++) {
        // Generate 20-character strings.
        Log.i(TAG, fortuna.randomString(20,bDigits,bLowercase,bUppercase));
        }

    // Allow digits (0-9)
    bDigits = true;
    Log.i(TAG, "-- digits and lower/uppercase alpha (0-9a-zA-Z)");
    for (i = 1; i <= 10; i++) {
        // Generate 20-character strings.
        Log.i(TAG, fortuna.randomString(20,bDigits,bLowercase,bUppercase));
        }

    // Allow only digits (0-9)
    bUppercase = false;
    bLowercase = false;
    Log.i(TAG, "-- only digits (0-9)");
    for (i = 1; i <= 10; i++) {
        // Generate 20-character strings.
        Log.i(TAG, fortuna.randomString(20,bDigits,bLowercase,bUppercase));
        }


  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}