some errors in android(sdk)???

smalltalk · by **smalltalk** » Wed Mar 12, 2008 2:17 pm

Hi +-

I want to ask you 2 question.
First question:
I want to build an encryption application in Android. I recognized in Android that has 2 useful library: javax.crypto, java.security. Are they from JDK of java? And if yes, they are from jdk 1.5 or jdk 1.6? On the other hand, when I run Cipher.getMaxAllowedKeyLength(“RC2”); but it always returns Integer max value with any argument (RC2 is only example). When I run in Java (NetBean Enviroment 5.5.1), Cipher.getMaxAllowedKeyLength(“RC2”) run ‘OK’ (return 128 with RC2). I don’t know what happened. I suppose virtual machine (dalvik) or SDK has some errors but not sure.Code below is ‘Ok’ for java(return 128) but not OK for android (return int max value).

Syntax: [ Download ] [ Hide ]

Using java Syntax Highlighting

import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
 
public class Security extends Activity {
    /** Called when the activity is first created. */
        String maxkeysize= "";
    @Override
    
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        TextView t = new TextView(this);
        initData();
        t.setText(maxkeysize);
        setContentView(t);
    }
    void initData()
    {
        try {
                int imaxkeysize = Cipher.getMaxAllowedKeyLength("RC2");
                maxkeysize = "Size is: " + imaxkeysize;
                maxkeysize +="n";
                maxkeysize += Integer.MAX_VALUE;
                Cipher des;
                try {
                        des = Cipher.getInstance("DES");
                        maxkeysize +=des.getAlgorithm();
                        maxkeysize += " " + des.getBlockSize();
                } catch (NoSuchPaddingException e) {
                // TODO Auto-generated catch block
                        e.printStackTrace();
                }
                        
        } catch (NoSuchAlgorithmException e) {
                // TODO Auto-generated catch block
                maxkeysize = e.toString();
        }
        
    }
}
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

Second question
Has Android a mechanism plugin. In android, for example, has contact application. Can I ‘add’ a function as plugin for contact application???

Please reply me fast (I'm really hurry)

Thank you very much

some errors in android(sdk)???

some errors in android(sdk)???

Who is online