Develop Reference

Custom Login with Twitter in android

How to create custom buttons for social login auth for twitter on android application development. By default social media have different SDK, which SDK twitter already has its own button social login but i want to use my own custom button and i wrote some code but getting exception
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference
my code:-
TwitterConfig config = new TwitterConfig.Builder(this)
.logger(new DefaultLogger(Log.DEBUG))
.twitterAuthConfig(new TwitterAuthConfig("KEY",
"KEY"))
.debug(true)
.build();
Twitter.initialize(config);
client = new TwitterAuthClient();
final TwitterSession session = TwitterCore.getInstance().getSessionManager().getActiveSession();
twitterButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
client.requestEmail(session, new Callback<String>() {
#Override
public void success(Result<String> result) {
System.out.println("Email is=====>" + result.data);
}
#Override
public void failure(TwitterException exception) {
}
});
}
});

please try this
add this gradle line in you project
compile 'com.twitter.sdk.android:twitter:3.0.0'
Write in your Activity/Fragment
//Your Custom Button
private ivTwitter;
//Twitter Login Button
private TwitterLoginButton ivTwitterMain;
//init twitter
TwitterConfig config = new TwitterConfig.Builder(this)
.logger(new DefaultLogger(Log.DEBUG))
.twitterAuthConfig(new TwitterAuthConfig(Const.CONSUMER_KEY, Const.CONSUMER_SECRET))
.debug(false)
.build();
Twitter.initialize(config);
//Write in onCreate method
ivTwitter = (ImageView) view.findViewById(R.id.ivTwitter);
ivTwitterMain = (TwitterLoginButton)view.findViewById(R.id.ivTwitterMain);
ivTwitterMain.setCallback(new Callback<TwitterSession>() {
#Override
public void success(Result<TwitterSession> result) {
// Do something with result, which provides a TwitterSession for making API calls
TwitterSession session = TwitterCore.getInstance().getSessionManager().getActiveSession();
TwitterAuthToken authToken = session.getAuthToken();
String token = authToken.token;
String secret = authToken.secret;
getTwitterUserProfile(session);
}
#Override
public void failure(TwitterException exception) {
// Do something on failure
Log.d(Const.FRAGMENT_REGISTER, exception.getMessage());
}
});
//getTwitterUserProfile
private void getTwitterUserProfile(TwitterSession session) {
AccountService accountService = new TwitterApiClient(session).getAccountService();
Call<User> callback = accountService.verifyCredentials(true, true, true);
callback.clone().enqueue(new Callback<User>() {
#Override
public void success(Result<User> result) {
Log.d("NAME ", result.data.name);
Log.d("EMAIL", result.data.email);
Log.d("PICTURE ", result.data.profileImageUrl);
}
#Override
public void failure(TwitterException exception) {
}
});
}
at last generate Click event of custom button
ivTwitter.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//twitter login button
ivTwitterMain.performClick();
}
});

/**Try to implement Below code Snipeet**/
First Download the Twitter Library from Below mentioned Link:
Link -> http://twitter4j.org/maven2/org/twitter4j/twitter4j-core/4.0.4/
Add the library to your build.gradle
/******************************************************/
Make "Twitter_Handler" Class inside your project
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLDecoder;
import oauth.signpost.OAuthProvider;
import oauth.signpost.basic.DefaultOAuthProvider;
import oauth.signpost.commonshttp.CommonsHttpOAuthConsumer;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import twitter4j.TwitterFactory;
import twitter4j.User;
import twitter4j.auth.AccessToken;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.ProgressDialog;
import android.os.Handler;
import android.os.Message;
import android.view.Window;
public class Twitter_Handler
{
public static Twitter twitterObj;
private final TwitterSession mSession;
private AccessToken mAccessToken;
private final CommonsHttpOAuthConsumer mHttpOauthConsumer;
private final OAuthProvider mHttpOauthprovider;
private final String mConsumerKey;
private final String mSecretKey;
private final ProgressDialog mProgressDlg;
private TwDialogListener mListener;
private final Activity context;
public static final String CALLBACK_URL = "twitterapp://connect";
private static final String TWITTER_ACCESS_TOKEN_URL = "https://api.twitter.com/oauth/access_token";
private static final String TWITTER_AUTHORZE_URL = "https://api.twitter.com/oauth/authorize";
private static final String TWITTER_REQUEST_URL = "https://api.twitter.com/oauth/request_token";
public Twitter_Handler(Activity context, String consumerKey,String secretKey)
{
this.context = context;
twitterObj = new TwitterFactory().getInstance();
mSession = new TwitterSession(context);
mProgressDlg = new ProgressDialog(context);
mProgressDlg.requestWindowFeature(Window.FEATURE_NO_TITLE);
mConsumerKey = consumerKey;
mSecretKey = secretKey;
mHttpOauthConsumer = new CommonsHttpOAuthConsumer(mConsumerKey,mSecretKey);
String request_url = TWITTER_REQUEST_URL;
String access_token_url = TWITTER_ACCESS_TOKEN_URL;
String authorize_url = TWITTER_AUTHORZE_URL;
mHttpOauthprovider = new DefaultOAuthProvider(request_url,access_token_url, authorize_url);
mAccessToken = mSession.getAccessToken();
configureToken();
}
public void setListener(TwDialogListener listener) {
mListener = listener;
}
private void configureToken()
{
if (mAccessToken != null)
{
twitterObj.setOAuthConsumer(mConsumerKey, mSecretKey);
twitterObj.setOAuthAccessToken(mAccessToken);
}
}
public boolean hasAccessToken() {
return (mAccessToken == null) ? false : true;
}
public void resetAccessToken() {
if (mAccessToken != null) {
mSession.resetAccessToken();
mAccessToken = null;
}
}
public String getUsername() {
return mSession.getUsername();
}
public void updateStatus(String status) throws Exception {
try {
twitterObj.updateStatus(status);
} catch (TwitterException e) {
throw e;
}
}
public void authorize()
{
mProgressDlg.setMessage("Loading ...");
mProgressDlg.show();
new Thread() {
#Override
public void run() {
String authUrl = "";
int what = 1;
try {
authUrl = mHttpOauthprovider.retrieveRequestToken(mHttpOauthConsumer, CALLBACK_URL);
what = 0;
} catch (Exception e) {
e.printStackTrace();
}
mHandler.sendMessage(mHandler.obtainMessage(what, 1, 0, authUrl));
}
}.start();
}
public void processToken(String callbackUrl)
{
mProgressDlg.setMessage("Finalizing ...");
mProgressDlg.show();
final String verifier = getVerifier(callbackUrl);
new Thread() {
#Override
public void run() {
int what = 1;
try {
mHttpOauthprovider.retrieveAccessToken(mHttpOauthConsumer,verifier);
mAccessToken = new AccessToken(mHttpOauthConsumer.getToken(),mHttpOauthConsumer.getTokenSecret());
configureToken();
User user = twitterObj.verifyCredentials();
mSession.storeAccessToken(mAccessToken, user.getName());
what = 0;
} catch (Exception e) {
e.printStackTrace();
}
mHandler.sendMessage(mHandler.obtainMessage(what, 2, 0));
}
}.start();
}
private String getVerifier(String callbackUrl) {
String verifier = "";
try {
callbackUrl = callbackUrl.replace("twitterapp", "http");
URL url = new URL(callbackUrl);
String query = url.getQuery();
String array[] = query.split("&");
for (String parameter : array) {
String v[] = parameter.split("=");
if (URLDecoder.decode(v[0]).equals(
oauth.signpost.OAuth.OAUTH_VERIFIER)) {
verifier = URLDecoder.decode(v[1]);
break;
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
}
return verifier;
}
private void showLoginDialog(String url) {
final TwDialogListener listener = new TwDialogListener() {
#Override
public void onComplete(String value) {
processToken(value);
}
#Override
public void onError(String value) {
mListener.onError("Failed opening authorization page");
}
};
new TwitterDialog(context, url, listener).show();
}
#SuppressLint("HandlerLeak")
private final Handler mHandler = new Handler() {
#Override
public void handleMessage(Message msg) {
mProgressDlg.dismiss();
if (msg.what == 1)
{
if (msg.arg1 == 1)
mListener.onError("Error getting request token");
else
mListener.onError("Error getting access token");
}
else
{
if (msg.arg1 == 1)
showLoginDialog((String) msg.obj);
else
mListener.onComplete("");
}
}
};
public interface TwDialogListener {
public void onComplete(String value);
public void onError(String value);
}
}
/******************************************************/
Now Make "Twitt_LoginOnly" Class inside your project
import android.app.Activity;
import android.widget.Toast;
public class Twitt_LoginOnly {
private final Twitter_Handler mTwitter;
private final Activity activity;
public static interface LoginResult
{
public abstract void loginResult(String message);
}
public LoginResult loginCallback;
public Twitt_LoginOnly( Activity act, String consumer_key, String consumer_secret,LoginResult loginCallback) {
this.activity = act;
mTwitter = new Twitter_Handler(activity, consumer_key, consumer_secret);
this.loginCallback = loginCallback;
}
public void loginToTwitter()
{
mTwitter.setListener(mTwLoginDialogListener);
if (mTwitter.hasAccessToken())
{
// this will post data in asyn background thread
//showTwittDialog();
showToast("Already Logged in");
loginCallback.loginResult("Already Logged in");
}
else
{
mTwitter.authorize();
}
}
private final TwDialogListener mTwLoginDialogListener = new TwDialogListener() {
#Override
public void onError(String value) {
loginCallback.loginResult("Login Failed");
activity.runOnUiThread(new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
showToast("Login Failed");
mTwitter.resetAccessToken();
}
});
}
#Override
public void onComplete(String value)
{
//showTwittDialog();
loginCallback.loginResult("Login Successfully");
showToast("Login Successfully");
}
};
void showToast(final String msg)
{
activity.runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(activity, msg, Toast.LENGTH_SHORT).show();
}
});
}
}
/******************************************************/
Now Implement the Code in your Activity or Fragment Class
twitter_login = (ImageView) findViewById(R.id.twitter_login);
twitter_login.setOnClickListener(new OnClickListener()
{
public void onClick(View button)
{
Twitt_LoginOnly logintwitter = new Twitt_LoginOnly(Activity.this,
“YOUR TWITTER_CONSUMER_KEY”, “YOUR TWITTER_CONSUMER_SECRET”, new Twitt_LoginOnly.LoginResult()
{
#Override
public void loginResult(String message)
{
TwitterSession twittersession = new TwitterSession(Activity.this);
if (twittersession.getAccessToken() != null)
{
}
}
});
logintwitter.loginToTwitter();
}
});

Parcelable ArrayList is always empty

I want to pass ArrayList via Intent to another activity. However, the code doesn't give any errors but List is always empty. Any idea what i'm doing wrong ? ty
Activity1
private ArrayList<ResimBean> rbList = new ArrayList<ResimBean>();
Bitmap bmp = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] thumbArray = stream.toByteArray();
Uri selectedImageUri = data.getData();
String fotopath = getRealPathFromURI(selectedImageUri);
ResimBean rb = new ResimBean(Parcel.obtain());
// rb.setResim(bar);
rb.setThumbnail(thumbArray);
rb.setPath(fotopath);
rbList.add(rb);
Intent intent = new Intent(getApplicationContext(), ResimListActivity.class);
intent.putParcelableArrayListExtra("reslist",rbList);
startActivityForResult(intent, 100);
Activity2
Bundle extras = getIntent().getExtras();
if (extras != null) {
try {
Intent i = getIntent();
ArrayList<ResimBean> rbList = i.getParcelableArrayListExtra("reslist");
} catch (Exception ex) {
String msg = ex.getMessage();
}
}
Its not giving any error but list is always empty.
EDIT
Added the code how i fill in list.
EDIT 2
Something wrong with my Parcelable class or what ?
public class ResimBean implements Parcelable {
private int Id;
private int HataBildirimId;
private byte[] Resim;
private byte[] Thumbnail;
public byte[] getThumbnail() {
return Thumbnail;
}
public void setThumbnail(byte[] thumbnail) {
Thumbnail = thumbnail;
}
private String Path;
public String getPath() {
return Path;
}
public void setPath(String path) {
Path = path;
}
public int getHataBildirimId() {
return HataBildirimId;
}
public void setHataBildirimId(int hataBildirimId) {
HataBildirimId = hataBildirimId;
}
public int getId() {
return Id;
}
public void setId(int id) {
Id = id;
}
public byte[] getResim() {
return Resim;
}
public void setResim(byte[] resim) {
Resim = resim;
}
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(HataBildirimId);
dest.writeByteArray(Resim);
dest.writeByteArray(Thumbnail);
}
public ResimBean(Parcel in) {
readFromParcel(in);
}
public void readFromParcel(Parcel in){
this.HataBildirimId = in.readInt();
this.Resim = new byte[in.readInt()];
this.Thumbnail = new byte[in.readInt()];
}
public static final Parcelable.Creator<ResimBean> CREATOR = new Parcelable.Creator<ResimBean>() {
#Override
public ResimBean createFromParcel(Parcel in) {
return new ResimBean(in);
}
#Override
public ResimBean[] newArray(int size) {
return new ResimBean[size];
}
};

The way you are showing, you create a new ArrayList<> and send it empty as extra via intent to the next activity.
Where exactly do you populate your ArrayList?
You should do something like this:
private ArrayList<ResimBean> rbList = new ArrayList<ResimBean>();
//populate rbList using adapter, then call intent
Intent intent = new Intent(getApplicationContext(), ResimListActivity.class);
intent.putParcelableArrayListExtra("reslist",rbList);
startActivityForResult(intent, 100);
Otherwise, the rbList you send as extra will always be empty. It sounds obvious but I don't know how you are doing it, so this is my best guess.

You can follow this tutorial:
http://aryo.lecture.ub.ac.id/android-passing-arraylist-of-object-within-an-intent/
I got it working like this
Bundle extras = this.getIntent().getExtras();
if (extras != null) {
try {
Intent i = getIntent();
ArrayList<ResimBean> rbList = (ArrayList<ResimBean>) i.getExtras().get("reslist");
Log.i("mytag", " "+i.getExtras().get("reslist").toString());
Log.i("mytag", " "+rbList.get(0).toString());
} catch (Exception ex) {
String msg = ex.getMessage();
}
}
With the rbList in Activity2 size=1,
With your code I was getting size=0

qrcode scanner a sample from zxing is not returning to onActivityResult after scanning

I am using the following code to create a qrcode scanner, got this code some one which refered to zxing library. The whole code works fine but when the scanner app close its not calling the onActivityResult after finshing the activity task. can somebody help me heres the code I am using .
My main activity
/**
* PhoneGap is available under *either* the terms of the modified BSD license *or* the
* MIT License (2008). See http://opensource.org/licenses/alphabetical for full text.
*
* Copyright (c) Matt Kane 2010
* Copyright (c) 2011, IBM Corporation
* Copyright (c) 2013, Maciej Nux Jaros
*/
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import org.apache.cordova.CordovaPlugin;
import org.apache.cordova.CallbackContext;
import org.apache.cordova.LOG;
import org.apache.cordova.PluginResult;
import android.util.Log;
import android.widget.Toast;
/**
* This calls out to the ZXing barcode reader and returns the result.
*
* #sa https://github.com/apache/cordova-android/blob/master/framework/src/org/apache/cordova/CordovaPlugin.java
*/
public class BarcodeScanner extends CordovaPlugin {
public static final int REQUEST_CODE = 0x0ba7c0de;
private static final String SCAN = "scan";
private static final String ENCODE = "encode";
private static final String CANCELLED = "cancelled";
private static final String FORMAT = "format";
private static final String TEXT = "text";
private static final String DATA = "data";
private static final String TYPE = "type";
private static final String SCAN_INTENT = "com.google.zxing.client.android.SCAN";
private static final String ENCODE_DATA = "ENCODE_DATA";
private static final String ENCODE_TYPE = "ENCODE_TYPE";
private static final String ENCODE_INTENT = "com.MobileApp.BarcodeScanner.ENCODE";
private static final String TEXT_TYPE = "TEXT_TYPE";
private static final String EMAIL_TYPE = "EMAIL_TYPE";
private static final String PHONE_TYPE = "PHONE_TYPE";
private static final String SMS_TYPE = "SMS_TYPE";
private static final String LOG_TAG = "BarcodeScanner";
private CallbackContext callbackContext;
/**
* Constructor.
*/
public BarcodeScanner() {
}
/**
* Executes the request.
*
* This method is called from the WebView thread. To do a non-trivial amount of work, use:
* cordova.getThreadPool().execute(runnable);
*
* To run on the UI thread, use:
* cordova.getActivity().runOnUiThread(runnable);
*
* #param action The action to execute.
* #param args The exec() arguments.
* #param callbackContext The callback context used when calling back into JavaScript.
* #return Whether the action was valid.
*
* #sa https://github.com/apache/cordova-android/blob/master/framework/src/org/apache/cordova/CordovaPlugin.java
*/
#Override
public boolean execute(String action, JSONArray args, CallbackContext callbackContext) {
this.callbackContext = callbackContext;
if (action.equals(ENCODE)) {
JSONObject obj = args.optJSONObject(0);
if (obj != null) {
String type = obj.optString(TYPE);
String data = obj.optString(DATA);
// If the type is null then force the type to text
if (type == null) {
type = TEXT_TYPE;
}
if (data == null) {
callbackContext.error("User did not specify data to encode");
return true;
}
// encode(type, data);
} else {
callbackContext.error("User did not specify data to encode");
return true;
}
} else if (action.equals(SCAN)) {
scan(args);
} else {
return false;
}
return true;
}
/**
* Starts an intent to scan and decode a barcode.
*/
public void scan(JSONArray args) {
IntentIntegrator integrator = new IntentIntegrator(this.cordova.getActivity());
integrator.initiateScan();
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
String contantsString = null;
IntentResult scanResult = IntentIntegrator.parseActivityResult(
requestCode, resultCode, data);
JSONObject obj = new JSONObject();
if (scanResult != null)
{
// handle scan result
contantsString = scanResult.getContents() == null ? "0"
: scanResult.getContents();
if (contantsString.equalsIgnoreCase("0"))
{
// Toast.makeText(this.cordova.getActivity(),
// "Problem to get the contant Number", Toast.LENGTH_LONG)
// .show();
Log.d(LOG_TAG, "Problem in reading the result possibly read string is 0");
}
else
{
// Toast.makeText(this.cordova.getActivity(), contantsString,
// Toast.LENGTH_LONG).show();
Log.d(LOG_TAG, "succesfully read the barcode");
}
try {
obj.put(TEXT, contantsString);
obj.put(FORMAT, contantsString);
obj.put(CANCELLED, false);
} catch (JSONException e) {
Log.d(LOG_TAG, "This should never happen");
}
} else {
// Toast.makeText(this.cordova.getActivity(),
// "Problem to scan the barcode.", Toast.LENGTH_LONG).show();
Log.d(LOG_TAG, "Problem in reading the result possibly read string is null");
try
{
obj.put(TEXT, "");
obj.put(FORMAT, "");
obj.put(CANCELLED, false);
}
catch (JSONException e) {
Log.d(LOG_TAG, "This should never happen");
}
}
}
}
IntentIntegrator class
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.util.Log;
public final class IntentIntegrator {
public static final int REQUEST_CODE = 0x0000c0de; // Only use bottom 16 bits
private static final String TAG = IntentIntegrator.class.getSimpleName();
public static final String DEFAULT_TITLE = "Install Barcode Scanner?";
public static final String DEFAULT_MESSAGE =
"This application requires Barcode Scanner. Would you like to install it?";
public static final String DEFAULT_YES = "Yes";
public static final String DEFAULT_NO = "No";
private static final String BS_PACKAGE = "com.google.zxing.client.android";
// supported barcode formats
public static final Collection<String> PRODUCT_CODE_TYPES = list("UPC_A", "UPC_E", "EAN_8", "EAN_13", "RSS_14");
public static final Collection<String> ONE_D_CODE_TYPES =
list("UPC_A", "UPC_E", "EAN_8", "EAN_13", "CODE_39", "CODE_93", "CODE_128",
"ITF", "RSS_14", "RSS_EXPANDED");
public static final Collection<String> QR_CODE_TYPES = Collections.singleton("QR_CODE");
public static final Collection<String> DATA_MATRIX_TYPES = Collections.singleton("DATA_MATRIX");
public static final Collection<String> ALL_CODE_TYPES = null;
public static final Collection<String> TARGET_BARCODE_SCANNER_ONLY = Collections.singleton(BS_PACKAGE);
public static final Collection<String> TARGET_ALL_KNOWN = list(
BS_PACKAGE, // Barcode Scanner
"com.srowen.bs.android", // Barcode Scanner+
"com.srowen.bs.android.simple" // Barcode Scanner+ Simple
// TODO add more -- what else supports this intent?
);
private final Activity activity;
private String title;
private String message;
private String buttonYes;
private String buttonNo;
private Collection<String> targetApplications;
public IntentIntegrator(Activity activity) {
this.activity = activity;
title = DEFAULT_TITLE;
message = DEFAULT_MESSAGE;
buttonYes = DEFAULT_YES;
buttonNo = DEFAULT_NO;
targetApplications = TARGET_ALL_KNOWN;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public void setTitleByID(int titleID) {
title = activity.getString(titleID);
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public void setMessageByID(int messageID) {
message = activity.getString(messageID);
}
public String getButtonYes() {
return buttonYes;
}
public void setButtonYes(String buttonYes) {
this.buttonYes = buttonYes;
}
public void setButtonYesByID(int buttonYesID) {
buttonYes = activity.getString(buttonYesID);
}
public String getButtonNo() {
return buttonNo;
}
public void setButtonNo(String buttonNo) {
this.buttonNo = buttonNo;
}
public void setButtonNoByID(int buttonNoID) {
buttonNo = activity.getString(buttonNoID);
}
public Collection<String> getTargetApplications() {
return targetApplications;
}
public void setTargetApplications(Collection<String> targetApplications) {
this.targetApplications = targetApplications;
}
public void setSingleTargetApplication(String targetApplication) {
this.targetApplications = Collections.singleton(targetApplication);
}
/**
* Initiates a scan for all known barcode types.
*/
public AlertDialog initiateScan() {
return initiateScan(ALL_CODE_TYPES);
}
/**
* Initiates a scan only for a certain set of barcode types, given as strings corresponding
* to their names in ZXing's {#code BarcodeFormat} class like "UPC_A". You can supply constants
* like {#link #PRODUCT_CODE_TYPES} for example.
*/
public AlertDialog initiateScan(Collection<String> desiredBarcodeFormats) {
Intent intentScan = new Intent(BS_PACKAGE + ".SCAN");
intentScan.addCategory(Intent.CATEGORY_DEFAULT);
// check which types of codes to scan for
if (desiredBarcodeFormats != null) {
// set the desired barcode types
StringBuilder joinedByComma = new StringBuilder();
for (String format : desiredBarcodeFormats) {
if (joinedByComma.length() > 0) {
joinedByComma.append(',');
}
joinedByComma.append(format);
}
intentScan.putExtra("SCAN_FORMATS", joinedByComma.toString());
}
String targetAppPackage = findTargetAppPackage(intentScan);
if (targetAppPackage == null) {
return showDownloadDialog();
}
intentScan.setPackage(targetAppPackage);
intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
activity.startActivityForResult(intentScan, REQUEST_CODE);
return null;
}
private String findTargetAppPackage(Intent intent) {
PackageManager pm = activity.getPackageManager();
List<ResolveInfo> availableApps = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
if (availableApps != null) {
for (ResolveInfo availableApp : availableApps) {
String packageName = availableApp.activityInfo.packageName;
if (targetApplications.contains(packageName)) {
return packageName;
}
}
}
return null;
}
private AlertDialog showDownloadDialog() {
AlertDialog.Builder downloadDialog = new AlertDialog.Builder(activity);
downloadDialog.setTitle(title);
downloadDialog.setMessage(message);
downloadDialog.setPositiveButton(buttonYes, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
Uri uri = Uri.parse("market://details?id=" + BS_PACKAGE);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
try {
activity.startActivity(intent);
} catch (ActivityNotFoundException anfe) {
// Hmm, market is not installed
Log.w(TAG, "Android Market is not installed; cannot install Barcode Scanner");
}
}
});
downloadDialog.setNegativeButton(buttonNo, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {}
});
return downloadDialog.show();
}
/**
* <p>Call this from your {#link Activity}'s
* {#link Activity#onActivityResult(int, int, Intent)} method.</p>
*
* #return null if the event handled here was not related to this class, or
* else an {#link IntentResult} containing the result of the scan. If the user cancelled scanning,
* the fields will be null.
*/
public static IntentResult parseActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
String contents = intent.getStringExtra("SCAN_RESULT");
String formatName = intent.getStringExtra("SCAN_RESULT_FORMAT");
byte[] rawBytes = intent.getByteArrayExtra("SCAN_RESULT_BYTES");
int intentOrientation = intent.getIntExtra("SCAN_RESULT_ORIENTATION", Integer.MIN_VALUE);
Integer orientation = intentOrientation == Integer.MIN_VALUE ? null : intentOrientation;
String errorCorrectionLevel = intent.getStringExtra("SCAN_RESULT_ERROR_CORRECTION_LEVEL");
return new IntentResult(contents,
formatName,
rawBytes,
orientation,
errorCorrectionLevel);
}
return new IntentResult();
}
return null;
}
/**
* Shares the given text by encoding it as a barcode, such that another user can
* scan the text off the screen of the device.
*
* #param text the text string to encode as a barcode
*/
public void shareText(CharSequence text) {
Intent intent = new Intent();
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setAction(BS_PACKAGE + ".ENCODE");
intent.putExtra("ENCODE_TYPE", "TEXT_TYPE");
intent.putExtra("ENCODE_DATA", text);
String targetAppPackage = findTargetAppPackage(intent);
if (targetAppPackage == null) {
showDownloadDialog();
} else {
intent.setPackage(targetAppPackage);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
activity.startActivity(intent);
}
}
private static Collection<String> list(String... values) {
return Collections.unmodifiableCollection(Arrays.asList(values));
}
}
IntentResult class
public final class IntentResult {
private final String contents;
private final String formatName;
private final byte[] rawBytes;
private final Integer orientation;
private final String errorCorrectionLevel;
IntentResult() {
this(null, null, null, null, null);
}
IntentResult(String contents,
String formatName,
byte[] rawBytes,
Integer orientation,
String errorCorrectionLevel) {
this.contents = contents;
this.formatName = formatName;
this.rawBytes = rawBytes;
this.orientation = orientation;
this.errorCorrectionLevel = errorCorrectionLevel;
}
/**
* #return raw content of barcode
*/
public String getContents() {
return contents;
}
/**
* #return name of format, like "QR_CODE", "UPC_A". See {#code BarcodeFormat} for more format names.
*/
public String getFormatName() {
return formatName;
}
/**
* #return raw bytes of the barcode content, if applicable, or null otherwise
*/
public byte[] getRawBytes() {
return rawBytes;
}
/**
* #return rotation of the image, in degrees, which resulted in a successful scan. May be null.
*/
public Integer getOrientation() {
return orientation;
}
/**
* #return name of the error correction level used in the barcode, if applicable
*/
public String getErrorCorrectionLevel() {
return errorCorrectionLevel;
}
#Override
public String toString() {
StringBuilder dialogText = new StringBuilder(100);
dialogText.append("Format: ").append(formatName).append('\n');
dialogText.append("Contents: ").append(contents).append('\n');
int rawBytesLength = rawBytes == null ? 0 : rawBytes.length;
dialogText.append("Raw bytes: (").append(rawBytesLength).append(" bytes)\n");
dialogText.append("Orientation: ").append(orientation).append('\n');
dialogText.append("EC level: ").append(errorCorrectionLevel).append('\n');
return dialogText.toString();
}
}
app opens but when it scans the qrcode it doesn't return anything.

This code worked for me ... I broke the above code and used it into mine and it worked.
/**
* PhoneGap is available under *either* the terms of the modified BSD license *or* the
* MIT License (2008). See http://opensource.org/licenses/alphabetical for full text.
*
* Copyright (c) Matt Kane 2010
* Copyright (c) 2011, IBM Corporation
* Copyright (c) 2013, Maciej Nux Jaros
*/
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.util.Log;
import org.apache.cordova.CordovaPlugin;
import org.apache.cordova.CallbackContext;
import org.apache.cordova.PluginResult;
/**
* This calls out to the ZXing barcode reader and returns the result.
*
* #sa https://github.com/apache/cordova-android/blob/master/framework/src/org/apache/cordova/CordovaPlugin.java
*/
public class BarcodeScanner extends CordovaPlugin {
public static final int REQUEST_CODE = 0x0ba7c0de;
private static final String SCAN = "scan";
private static final String ENCODE = "encode";
private static final String CANCELLED = "cancelled";
private static final String FORMAT = "format";
private static final String TEXT = "text";
private static final String DATA = "data";
private static final String TYPE = "type";
private static final String SCAN_INTENT = "com.google.zxing.client.android";
private static final String ENCODE_DATA = "ENCODE_DATA";
private static final String ENCODE_TYPE = "ENCODE_TYPE";
private static final String ENCODE_INTENT = "com.phonegap.plugins.barcodescanner.ENCODE";
private static final String TEXT_TYPE = "TEXT_TYPE";
private static final String EMAIL_TYPE = "EMAIL_TYPE";
private static final String PHONE_TYPE = "PHONE_TYPE";
private static final String SMS_TYPE = "SMS_TYPE";
private static final String LOG_TAG = "BarcodeScanner";
private CallbackContext callbackContext;
/**
* Constructor.
*/
public BarcodeScanner() {
}
/**
* Executes the request.
*
* This method is called from the WebView thread. To do a non-trivial amount of work, use:
* cordova.getThreadPool().execute(runnable);
*
* To run on the UI thread, use:
* cordova.getActivity().runOnUiThread(runnable);
*
* #param action The action to execute.
* #param args The exec() arguments.
* #param callbackContext The callback context used when calling back into JavaScript.
* #return Whether the action was valid.
*
* #sa https://github.com/apache/cordova-android/blob/master/framework/src/org/apache/cordova/CordovaPlugin.java
*/
#Override
public boolean execute(String action, JSONArray args, CallbackContext callbackContext) {
this.callbackContext = callbackContext;
if (action.equals(ENCODE)) {
JSONObject obj = args.optJSONObject(0);
if (obj != null) {
String type = obj.optString(TYPE);
String data = obj.optString(DATA);
// If the type is null then force the type to text
if (type == null) {
type = TEXT_TYPE;
}
if (data == null) {
callbackContext.error("User did not specify data to encode");
return true;
}
encode(type, data);
} else {
callbackContext.error("User did not specify data to encode");
return true;
}
} else if (action.equals(SCAN)) {
scan();
} else {
return false;
}
return true;
}
/**
* Starts an intent to scan and decode a barcode.
*/
public AlertDialog scan() {
Intent intentScan = new Intent(SCAN_INTENT+".SCAN");
intentScan.addCategory(Intent.CATEGORY_DEFAULT);
String targetAppPackage = findTargetAppPackage(intentScan);
if (targetAppPackage == null) {
return showDownloadDialog();
}
this.cordova.startActivityForResult((CordovaPlugin) this, intentScan, REQUEST_CODE);
return null;
}
private String findTargetAppPackage(Intent intent) {
PackageManager pm = this.cordova.getActivity().getPackageManager();
List<ResolveInfo> availableApps = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
if (availableApps != null) {
for (ResolveInfo availableApp : availableApps) {
String packageName = availableApp.activityInfo.packageName;
// if (targetApplications.contains(packageName)) {
// return packageName;
// }
if (packageName!=null) {
return packageName;
}
}
}
return null;
}
private AlertDialog showDownloadDialog() {
AlertDialog.Builder downloadDialog = new AlertDialog.Builder(BarcodeScanner.this.cordova.getActivity());
downloadDialog.setTitle("Install Barcode Scanner?");
downloadDialog.setMessage("This application requires Barcode Scanner. Would you like to install it?");
downloadDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
Uri uri = Uri.parse("market://details?id=" + SCAN_INTENT);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
try {
BarcodeScanner.this.cordova.getActivity().startActivity(intent);
} catch (ActivityNotFoundException anfe) {
// Hmm, market is not installed
// Log.w(TAG, "Android Market is not installed; cannot install Barcode Scanner");
}
}
});
downloadDialog.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {}
});
return downloadDialog.show();
}
/**
* Called when the barcode scanner intent completes.
*
* #param requestCode The request code originally supplied to startActivityForResult(),
* allowing you to identify who this result came from.
* #param resultCode The integer result code returned by the child activity through its setResult().
* #param intent An Intent, which can return result data to the caller (various data can be attached to Intent "extras").
*/
#Override
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
JSONObject obj = new JSONObject();
try {
obj.put(TEXT, intent.getStringExtra("SCAN_RESULT"));
obj.put(FORMAT, intent.getStringExtra("SCAN_RESULT_FORMAT"));
obj.put(CANCELLED, false);
} catch (JSONException e) {
Log.d(LOG_TAG, "This should never happen");
}
//this.success(new PluginResult(PluginResult.Status.OK, obj), this.callback);
this.callbackContext.success(obj);
} else if (resultCode == Activity.RESULT_CANCELED) {
JSONObject obj = new JSONObject();
try {
obj.put(TEXT, "");
obj.put(FORMAT, "");
obj.put(CANCELLED, true);
} catch (JSONException e) {
Log.d(LOG_TAG, "This should never happen");
}
//this.success(new PluginResult(PluginResult.Status.OK, obj), this.callback);
this.callbackContext.success(obj);
} else {
//this.error(new PluginResult(PluginResult.Status.ERROR), this.callback);
this.callbackContext.error("Unexpected error");
}
}
}
/**
* Initiates a barcode encode.
*
* #param type Endoiding type.
* #param data The data to encode in the bar code.
*/
public void encode(String type, String data) {
Intent intentEncode = new Intent(ENCODE_INTENT);
intentEncode.putExtra(ENCODE_TYPE, type);
intentEncode.putExtra(ENCODE_DATA, data);
this.cordova.getActivity().startActivity(intentEncode);
}
}

Barcode scanning issue

I am working on barcode scanning on button click to increment the quantity counted field by one of a table when the scanning result matches with the item number field of the table. If the scan result matches item number it should update the quantity counted of that row. I am unable to get the scan result itself. Getting NullPointerException.
This is my code.
These are two Java files from zxing.
IntentIntegrator.java
package com.example.mis;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ActivityNotFoundException;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
public class IntentIntegrator {
public static final int REQUEST_CODE = 0x0000c0de; // Only use bottom 16
// bits
private static final String TAG = IntentIntegrator.class.getSimpleName();
public static final String DEFAULT_TITLE = "Install Barcode Scanner?";
public static final String DEFAULT_MESSAGE = "This application requires Barcode Scanner. Would you like to install it?";
public static final String DEFAULT_YES = "Yes";
public static final String DEFAULT_NO = "No";
private static final String BS_PACKAGE = "com.google.zxing.client.android";
private static final String BSPLUS_PACKAGE = "com.srowen.bs.android";
// supported barcode formats
public static final Collection<String> PRODUCT_CODE_TYPES = list("UPC_A",
"UPC_E", "EAN_8", "EAN_13", "RSS_14");
public static final Collection<String> ONE_D_CODE_TYPES = list("UPC_A",
"UPC_E", "EAN_8", "EAN_13", "CODE_39", "CODE_93", "CODE_128",
"ITF", "RSS_14", "RSS_EXPANDED");
public static final Collection<String> QR_CODE_TYPES = Collections
.singleton("QR_CODE");
public static final Collection<String> DATA_MATRIX_TYPES = Collections
.singleton("DATA_MATRIX");
public static final Collection<String> ALL_CODE_TYPES = null;
public static final List<String> TARGET_BARCODE_SCANNER_ONLY = Collections
.singletonList(BS_PACKAGE);
public static final List<String> TARGET_ALL_KNOWN = list(BSPLUS_PACKAGE, // Barcode
// Scanner+
BSPLUS_PACKAGE + ".simple", // Barcode Scanner+ Simple
BS_PACKAGE // Barcode Scanner
// What else supports this intent?
);
private final Activity activity;
private String title;
private String message;
private String buttonYes;
private String buttonNo;
private List<String> targetApplications;
private final Map<String, Object> moreExtras;
public IntentIntegrator(Activity activity) {
this.activity = activity;
title = DEFAULT_TITLE;
message = DEFAULT_MESSAGE;
buttonYes = DEFAULT_YES;
buttonNo = DEFAULT_NO;
targetApplications = TARGET_ALL_KNOWN;
moreExtras = new HashMap<String, Object>(3);
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public void setTitleByID(int titleID) {
title = activity.getString(titleID);
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public void setMessageByID(int messageID) {
message = activity.getString(messageID);
}
public String getButtonYes() {
return buttonYes;
}
public void setButtonYes(String buttonYes) {
this.buttonYes = buttonYes;
}
public void setButtonYesByID(int buttonYesID) {
buttonYes = activity.getString(buttonYesID);
}
public String getButtonNo() {
return buttonNo;
}
public void setButtonNo(String buttonNo) {
this.buttonNo = buttonNo;
}
public void setButtonNoByID(int buttonNoID) {
buttonNo = activity.getString(buttonNoID);
}
public Collection<String> getTargetApplications() {
return targetApplications;
}
public final void setTargetApplications(List<String> targetApplications) {
if (targetApplications.isEmpty()) {
throw new IllegalArgumentException("No target applications");
}
this.targetApplications = targetApplications;
}
public void setSingleTargetApplication(String targetApplication) {
this.targetApplications = Collections.singletonList(targetApplication);
}
public Map<String, ?> getMoreExtras() {
return moreExtras;
}
public final void addExtra(String key, Object value) {
moreExtras.put(key, value);
}
/**
* Initiates a scan for all known barcode types.
*/
public final AlertDialog initiateScan() {
return initiateScan(ALL_CODE_TYPES);
}
/**
* Initiates a scan only for a certain set of barcode types, given as
* strings corresponding to their names in ZXing's {#code BarcodeFormat}
* class like "UPC_A". You can supply constants like
* {#link #PRODUCT_CODE_TYPES} for example.
*
* #return the {#link AlertDialog} that was shown to the user prompting them
* to download the app if a prompt was needed, or null otherwise
*/
public final AlertDialog initiateScan(
Collection<String> desiredBarcodeFormats) {
Intent intentScan = new Intent(BS_PACKAGE + ".SCAN");
intentScan.addCategory(Intent.CATEGORY_DEFAULT);
// check which types of codes to scan for
if (desiredBarcodeFormats != null) {
// set the desired barcode types
StringBuilder joinedByComma = new StringBuilder();
for (String format : desiredBarcodeFormats) {
if (joinedByComma.length() > 0) {
joinedByComma.append(',');
}
joinedByComma.append(format);
}
intentScan.putExtra("SCAN_FORMATS", joinedByComma.toString());
}
String targetAppPackage = findTargetAppPackage(intentScan);
if (targetAppPackage == null) {
return showDownloadDialog();
}
intentScan.setPackage(targetAppPackage);
intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
attachMoreExtras(intentScan);
startActivityForResult(intentScan, REQUEST_CODE);
return null;
}
/**
* Start an activity. This method is defined to allow different methods of
* activity starting for newer versions of Android and for compatibility
* library.
*
* #param intent
* Intent to start.
* #param code
* Request code for the activity
* #see android.app.Activity#startActivityForResult(Intent, int)
* #see android.app.Fragment#startActivityForResult(Intent, int)
*/
protected void startActivityForResult(Intent intent, int code) {
activity.startActivityForResult(intent, code);
}
private String findTargetAppPackage(Intent intent) {
PackageManager pm = activity.getPackageManager();
List<ResolveInfo> availableApps = pm.queryIntentActivities(intent,
PackageManager.MATCH_DEFAULT_ONLY);
if (availableApps != null) {
for (String targetApp : targetApplications) {
if (contains(availableApps, targetApp)) {
return targetApp;
}
}
}
return null;
}
private static boolean contains(Iterable<ResolveInfo> availableApps,
String targetApp) {
for (ResolveInfo availableApp : availableApps) {
String packageName = availableApp.activityInfo.packageName;
if (targetApp.equals(packageName)) {
return true;
}
}
return false;
}
private AlertDialog showDownloadDialog() {
AlertDialog.Builder downloadDialog = new AlertDialog.Builder(activity);
downloadDialog.setTitle(title);
downloadDialog.setMessage(message);
downloadDialog.setPositiveButton(buttonYes,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
String packageName = targetApplications.get(0);
Uri uri = Uri.parse("market://details?id="
+ packageName);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
try {
activity.startActivity(intent);
} catch (ActivityNotFoundException anfe) {
// Hmm, market is not installed
Log.w(TAG,
"Google Play is not installed; cannot install "
+ packageName);
}
}
});
downloadDialog.setNegativeButton(buttonNo,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
}
});
return downloadDialog.show();
}
/**
* <p>
* Call this from your {#link Activity}'s
* {#link Activity#onActivityResult(int, int, Intent)} method.
* </p>
*
* #return null if the event handled here was not related to this class, or
* else an {#link IntentResult} containing the result of the scan.
* If the user cancelled scanning, the fields will be null.
*/
public static IntentResult parseActivityResult(int requestCode,
int resultCode, Intent intent) {
if (requestCode == REQUEST_CODE) {
if (resultCode == Activity.RESULT_OK) {
String contents = intent.getStringExtra("SCAN_RESULT");
String formatName = intent.getStringExtra("SCAN_RESULT_FORMAT");
byte[] rawBytes = intent.getByteArrayExtra("SCAN_RESULT_BYTES");
int intentOrientation = intent.getIntExtra(
"SCAN_RESULT_ORIENTATION", Integer.MIN_VALUE);
Integer orientation = intentOrientation == Integer.MIN_VALUE ? null
: intentOrientation;
String errorCorrectionLevel = intent
.getStringExtra("SCAN_RESULT_ERROR_CORRECTION_LEVEL");
return new IntentResult(contents, formatName, rawBytes,
orientation, errorCorrectionLevel);
}
return new IntentResult();
}
return null;
}
/**
* Defaults to type "TEXT_TYPE".
*
* #see #shareText(CharSequence, CharSequence)
*/
public final AlertDialog shareText(CharSequence text) {
return shareText(text, "TEXT_TYPE");
}
/**
* Shares the given text by encoding it as a barcode, such that another user
* can scan the text off the screen of the device.
*
* #param text
* the text string to encode as a barcode
* #param type
* type of data to encode. See
* {#code com.google.zxing.client.android.Contents.Type}
* constants.
* #return the {#link AlertDialog} that was shown to the user prompting them
* to download the app if a prompt was needed, or null otherwise
*/
public final AlertDialog shareText(CharSequence text, CharSequence type) {
Intent intent = new Intent();
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setAction(BS_PACKAGE + ".ENCODE");
intent.putExtra("ENCODE_TYPE", type);
intent.putExtra("ENCODE_DATA", text);
String targetAppPackage = findTargetAppPackage(intent);
if (targetAppPackage == null) {
return showDownloadDialog();
}
intent.setPackage(targetAppPackage);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
attachMoreExtras(intent);
activity.startActivity(intent);
return null;
}
private static List<String> list(String... values) {
return Collections.unmodifiableList(Arrays.asList(values));
}
private void attachMoreExtras(Intent intent) {
for (Map.Entry<String, Object> entry : moreExtras.entrySet()) {
String key = entry.getKey();
Object value = entry.getValue();
// Kind of hacky
if (value instanceof Integer) {
intent.putExtra(key, (Integer) value);
} else if (value instanceof Long) {
intent.putExtra(key, (Long) value);
} else if (value instanceof Boolean) {
intent.putExtra(key, (Boolean) value);
} else if (value instanceof Double) {
intent.putExtra(key, (Double) value);
} else if (value instanceof Float) {
intent.putExtra(key, (Float) value);
} else if (value instanceof Bundle) {
intent.putExtra(key, (Bundle) value);
} else {
intent.putExtra(key, value.toString());
}
}
}
}
IntentResult.java
package com.example.mis;
public class IntentResult {
private final String contents;
private final String formatName;
private final byte[] rawBytes;
private final Integer orientation;
private final String errorCorrectionLevel;
IntentResult() {
this(null, null, null, null, null);
}
IntentResult(String contents,
String formatName,
byte[] rawBytes,
Integer orientation,
String errorCorrectionLevel) {
this.contents = contents;
this.formatName = formatName;
this.rawBytes = rawBytes;
this.orientation = orientation;
this.errorCorrectionLevel = errorCorrectionLevel;
}
/**
* #return raw content of barcode
*/
public String getContents() {
return contents;
}
/**
* #return name of format, like "QR_CODE", "UPC_A". See {#code BarcodeFormat} for more format names.
*/
public String getFormatName() {
return formatName;
}
/**
* #return raw bytes of the barcode content, if applicable, or null otherwise
*/
public byte[] getRawBytes() {
return rawBytes;
}
/**
* #return rotation of the image, in degrees, which resulted in a successful scan. May be null.
*/
public Integer getOrientation() {
return orientation;
}
/**
* #return name of the error correction level used in the barcode, if applicable
*/
public String getErrorCorrectionLevel() {
return errorCorrectionLevel;
}
#Override
public String toString() {
StringBuilder dialogText = new StringBuilder(100);
dialogText.append("Format: ").append(formatName).append('\n');
dialogText.append("Contents: ").append(contents).append('\n');
int rawBytesLength = rawBytes == null ? 0 : rawBytes.length;
dialogText.append("Raw bytes: (").append(rawBytesLength).append(" bytes)\n");
dialogText.append("Orientation: ").append(orientation).append('\n');
dialogText.append("EC level: ").append(errorCorrectionLevel).append('\n');
return dialogText.toString();
}
}
This is the activity in which i am implementing barcode scanning
public class InventoryCount extends Activity {
private Button mbtn_scan;
mbtn_scan.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
IntentIntegrator integrator = new IntentIntegrator(
InventoryCount.this);
integrator.initiateScan();
}
});
}
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
// retrieve result of scanning - instantiate ZXing object
IntentResult scanningResult = IntentIntegrator.parseActivityResult(
requestCode, resultCode, intent);
// check we have a valid result
try {
if (resultCode == RESULT_OK) {
Log.i("Scanning Result ", "" + scanningResult);
Toast.makeText(
InventoryCount.this,
"Scanning success the content is : "
+ scanningResult.getContents(),
Toast.LENGTH_SHORT).show();
String sr = scanningResult.getContents();
getBarCodeData(sr);
} else if (resultCode == RESULT_CANCELED) {
Toast toast = Toast.makeText(InventoryCount.this,
"Scanning Cancelled!", Toast.LENGTH_SHORT);
toast.show();
}
} catch (Exception e) {
System.out.println("Error on scanning: "+e);
}
}
public void getBarCodeData(String itmNumber) {
Cursor c;
try {
String qtyCountQry = "SELECT " + DatabaseHandler.KEY_QTYCOUNTED
+ " FROM " + DatabaseHandler.TABLE_MIC2 + " WHERE "
+ DatabaseHandler.KEY_ITEMNUMBER + "='" + itmNumber + "'";
SQLiteDatabase sq = db.getReadableDatabase();
c = sq.rawQuery(qtyCountQry, null);
c.moveToFirst();
String q2 = c.getString(c
.getColumnIndex(DatabaseHandler.KEY_QTYCOUNTED));
Toast.makeText(InventoryCount.this, "Quantity Count is " + q2,
Toast.LENGTH_SHORT).show();
} catch (Exception e) {
Toast.makeText(InventoryCount.this, "Exception " + e,
Toast.LENGTH_SHORT).show();
}
}
I have just tried to display scan result and if it matches itemnumber it will display the corresponding quantity in that row as shown in code above. But as of now not even scan result is displaying. Help me.. Also say how to increment the quantity by one and update it in db.

Try to use the zxing library by extending the CaptureActivity Class.
public class ScannerData extends CaptureActivity {
Handler handler = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_scanner);
}
#Override
public void handleDecode(final Result rawResult, Bitmap barcode,
float scaleFactor) {
// TODO Auto-generated method stub
handler = getHandler();
handler.sendEmptyMessageDelayed(R.id.restart_preview,
CaptureActivity.BULK_MODE_SCAN_DELAY_MS);
String mQrcode = rawResult.getText().toString();
}
}
Use the code like this.
You can get the qr-code here
String mQrcode = rawResult.getText().toString();
In Xml you need to include capture.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:id="#+id/frameLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_gravity="center_horizontal"
android:layout_marginRight="25dp">
<FrameLayout
android:layout_width="510dp"
android:layout_height="310dp"
android:background="#drawable/scanner_box"
android:layout_gravity="center" >
<include
android:layout_width="750dp"
android:layout_height="450dp"
android:layout_gravity="center"
android:layout_marginBottom="50dp"
android:layout_marginRight="110dp"
layout="#layout/capture" />
</FrameLayout>
</RelativeLayout>
</RelativeLayout>

How can i list google documents android?

Using Accountmanager i get the token now what?
m using the following class
package com.googleaccount;
import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.Toast;
public class GoogleAccountTestActivity extends Activity {
/** Called when the activity is first created. */
private static final int DIALOG_ACCOUNTS = 0;
private static final int REQUEST_AUTHENTICATE = 0;
protected static final String AUTH_TOKEN_TYPE = "";
private String authToken;
Context context;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context=this;
gotAccount(false);
}
#Override
protected Dialog onCreateDialog(int id) {
switch (id) {
case DIALOG_ACCOUNTS:
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select a Google account");
final AccountManager manager = AccountManager.get(this);
final Account[] accounts = manager.getAccountsByType("com.google");
final int size = accounts.length;
String[] names = new String[size];
for (int i = 0; i < size; i++) {
names[i] = accounts[i].name;
}
builder.setItems(names, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
gotAccount(manager, accounts[which]);
}
});
return builder.create();
}
return null;
}
private void gotAccount(boolean tokenExpired) {
SharedPreferences settings = getSharedPreferences("test", 0);
String accountName = settings.getString("accountName", null);
if (accountName != null) {
AccountManager manager = AccountManager.get(this);
Account[] accounts = manager.getAccountsByType("com.google");
int size = accounts.length;
for (int i = 0; i < size; i++) {
Account account = accounts[i];
if (accountName.equals(account.name)) {
Toast.makeText(this,"OLD accunt name"+account.name , Toast.LENGTH_SHORT).show();
if (tokenExpired) {
Toast.makeText(this,"Token EXpired", Toast.LENGTH_SHORT).show();
manager.invalidateAuthToken("com.google", this.authToken);
}
gotAccount(manager, account);
return;
}
}
}
showDialog(DIALOG_ACCOUNTS);
}
private void gotAccount(final AccountManager manager, final Account account) {
SharedPreferences settings = getSharedPreferences("test", 0);
SharedPreferences.Editor editor = settings.edit();
editor.putString("accountName", account.name);
editor.commit();
new Thread() {
#Override
public void run() {
try {
final Bundle bundle =
manager.getAuthToken(account, AUTH_TOKEN_TYPE, true, null, null)
.getResult();
runOnUiThread(new Runnable() {
public void run() {
try {
if (bundle.containsKey(AccountManager.KEY_INTENT)) {
Intent intent =
bundle.getParcelable(AccountManager.KEY_INTENT);
int flags = intent.getFlags();
flags &= ~Intent.FLAG_ACTIVITY_NEW_TASK;
intent.setFlags(flags);
startActivityForResult(intent, REQUEST_AUTHENTICATE);
} else if (bundle.containsKey(AccountManager.KEY_AUTHTOKEN)) {
authenticatedClientLogin(
bundle.getString(AccountManager.KEY_AUTHTOKEN));
}
} catch (Exception e) {
// handleException(e);
Toast.makeText(context,e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
});
} catch (Exception e) {
//handleException(e);
Toast.makeText(context,e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
}.start();
}
#Override
protected void onActivityResult(
int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case REQUEST_AUTHENTICATE:
if (resultCode == RESULT_OK) {
Toast.makeText(this,"Result OK!!" , Toast.LENGTH_SHORT).show();
gotAccount(false);
} else {
Toast.makeText(this,"Result False!!" , Toast.LENGTH_SHORT).show();
showDialog(DIALOG_ACCOUNTS);
}
break;
}
}
private void authenticatedClientLogin(String authToken) {
this.authToken = authToken;
Toast.makeText(this,"Token "+authToken, Toast.LENGTH_LONG).show();
//((GoogleHeaders) transport.defaultHeaders).setGoogleLogin(authToken);
//authenticated();
}
}

Your best bet is to use the Google API Client library:
http://code.google.com/p/google-api-java-client/wiki/Setup
Download the core jars(link to be found in the wiki) and dependencies. In particular, you should be looking for these jars:
google-api-client-version-alpha.jar
google-api-client-googleapis-version-alpha.jar
guava-version.jar
jackson-core-asl-version.jar
Next. set up your model classes that describe your feed. For DocList, refer this sample:
Google API DocList Sample
DocUrl.java, DocumentListEntry.java, DocumentListFeed.java, Entry.java, Feed.java & Link.java are the model classes which should set you up.
Next, initialize your HTTPTransport by choosing the parser i.e. Atom/Json and fire your request.
public static final XmlNamespaceDictionary NAMESPACE_DICTIONARY = new XmlNamespaceDictionary();
static {
NAMESPACE_DICTIONARY.set("", "http://www.w3.org/2005/Atom");
NAMESPACE_DICTIONARY.set("app", "http://www.w3.org/2007/app");
NAMESPACE_DICTIONARY.set("batch", "http://schemas.google.com/gdata/batch");
NAMESPACE_DICTIONARY.set("docs", "http://schemas.google.com/docs/2007");
NAMESPACE_DICTIONARY.set("gs", "http://schemas.google.com/spreadsheets/2006");
NAMESPACE_DICTIONARY.set("gd", "http://schemas.google.com/g/2005");
NAMESPACE_DICTIONARY.set("gsx", "http://schemas.google.com/spreadsheets/2006/extended");
NAMESPACE_DICTIONARY.set("openSearch", "http://a9.com/-/spec/opensearch/1.1/");
NAMESPACE_DICTIONARY.set("xml", "http://www.w3.org/XML/1998/namespace");
}
private static HttpTransport transport;
private void setupTransport() {
transport = new NetHttpTransport();
GoogleHeaders headers = new GoogleHeaders();
transport.defaultHeaders = headers;
headers.setApplicationName("MyApp/1.0");
headers.gdataVersion = "3.0";
((GoogleHeaders) transport.defaultHeaders)
.setGoogleLogin(<yourtoken>);
AtomParser parser = new AtomParser();
parser.namespaceDictionary = Util.NAMESPACE_DICTIONARY;
transport.addParser(parser);
}
public processDocs() {
setupTransport();
DocUrl url = DocUrl.relativeToRoot(<URL suffix>);
DocListFeed feed = DocListFeed.executeGet(transport, url);
if (feed.entries != null) {
for (DocEntry entry : feed.entries) {
//<do whatever>
}
}