Radhey Radhey - 2 months ago 25
Android Question

ANDROID : java.lang.NoSuchMethodError: org.apache.commons.codec.binary.Base64.encodeBase64String in android

want to generate signature for oauth login .for this i used HmacSHA1 and base64 algo.please have a look below code stuff.I already visit so many links related this but this gives solution for java plat form [J2EE] not for the Android .same code/ method is working fine and generate signature in the eclipse of java but it throws error in android .

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Serializable;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Random;

import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;


import org.apache.commons.codec.binary.Base64;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.util.EntityUtils;



import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class FitBitActivity extends Activity implements Serializable{
WebView webView;
static String authToken;
Context context = this;
ProgressDialog progressBar;
String finalAuthToken = "";
String finalAuthTokenSecrate = "";
String finalEncodedUserID = "";
String authVerifer = "";
String tempAuthToken = "";
String fitbitUser = "";
SharedPreferences sharedPref;
String userid;
static String TAG = "FitBitActivity";

String Authorization = "";
String res= "";
static String timestamp ;
String auth_nonce="456236281" ;
static String nonce ;
// String parameters;
static String consumerKey= "XXXXXX your key XXXXX";
private ProgressDialog pDialog;

Random RAND ;
private static final String HMAC_SHA1 = "HmacSHA1";


@SuppressLint({ "NewApi", "NewApi", "NewApi" })
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fitbit_activity);

Long tsLong = System.currentTimeMillis()/1000;
timestamp = tsLong.toString();

RAND = new Random();
nonce = timestamp + RAND.nextInt();


generateSignature();


}

public static void generateSignature() {
// TODO Auto-generated method stub
String base_string =
"POST&https%3A%2F%2Fapi.fitbit.com%2Foauth%2Frequest_token&oauth_consumer_key%3D"
+consumerKey+"%26"+"oauth_nonce%3D"+nonce+"%26oauth_signature_method%3DHMAC-SHA1%26oauth_timestamp%3D"+timestamp+"%26oauth_version%3D1.0";
String key = "sign";


try {
Mac mac = Mac.getInstance("HmacSHA1");
SecretKeySpec secret = new SecretKeySpec(key.getBytes("UTF-8"), mac.getAlgorithm());
mac.init(secret);
byte[] digest = mac.doFinal(base_string.getBytes());

String enc = new String(digest);

// Base 64 Encode the results
String retVal = Base64.encodeBase64String(digest);

// byte[] retVal = Base64.encode(base_string.getBytes(), Base64.NO_WRAP);

// byte[] retVal = Base64.encodeBase64(base_string.getBytes());

Log.e(TAG, "String: " + base_string);
Log.e(TAG, "key: " + key);
Log.e(TAG, "result: " + retVal.toString());

} catch (Exception e) {
System.out.println(e.getMessage());
}

}


}

Answer

The org.apache.commons.codec.binary.Base64 class is not part of the standard Android APIs. To fix the problem, just use the standard Base64 class that comes with Android by replacing these lines:

import org.apache.commons.codec.binary.Base64;
...
String retVal = Base64.encodeBase64String(digest);

by:

import android.util.Base64;
...
String retVal = Base64.encodeToString(digest, Base64.DEFAULT);
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