Java tutorial
/** * Copyright (c) 2014-present, Facebook, Inc. All rights reserved. * * You are hereby granted a non-exclusive, worldwide, royalty-free license to use, * copy, modify, and distribute this software in source code or binary form for use * in connection with the web services and APIs provided by Facebook. * * As with any software that integrates with the Facebook platform, your use of * this software is subject to the Facebook Developer Principles and Policies * [http://developers.facebook.com/policy/]. This copyright notice shall be * included in all copies or substantial portions of the software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ package com.hayageek.QRAuth; import android.annotation.SuppressLint; import android.app.Activity; import android.app.AlertDialog; import android.content.ActivityNotFoundException; import android.content.Intent; import android.graphics.Rect; import android.hardware.Camera; import android.hardware.Camera.PictureCallback; import android.os.Bundle; import android.os.Environment; import android.os.StrictMode; import android.provider.MediaStore.Files.FileColumns; import android.support.v4.app.FragmentActivity; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.FrameLayout; import android.widget.TextView; import android.widget.Toast; import com.facebook.*; import com.facebook.appevents.AppEventsLogger; import com.facebook.login.LoginManager; import com.facebook.login.LoginResult; import com.facebook.login.widget.LoginButton; import com.google.zxing.client.android.CaptureActivity; import com.google.zxing.integration.android.IntentIntegrator; import com.google.zxing.integration.android.IntentResult; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; @SuppressLint("NewApi") public class MainActivity extends FragmentActivity { static final String ACTION_SCAN = "com.google.zxing.client.android.SCAN"; private TextView greeting; private Button scanButton; private CallbackManager callbackManager; private ProfileTracker profileTracker; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build(); StrictMode.setThreadPolicy(policy); FacebookSdk.sdkInitialize(this.getApplicationContext()); setContentView(R.layout.main); greeting = (TextView) findViewById(R.id.greeting); scanButton = (Button) findViewById(R.id.scanqr); AccessToken accessToken = AccessToken.getCurrentAccessToken(); if (accessToken != null) { Log.v("###", "Access Token: " + accessToken.getToken()); scanButton.setVisibility(View.VISIBLE); } else { scanButton.setVisibility(View.INVISIBLE); Log.v("###", "## NOT LOgged IN"); } callbackManager = CallbackManager.Factory.create(); LoginManager.getInstance().registerCallback(callbackManager, new FacebookCallback<LoginResult>() { @Override public void onSuccess(LoginResult loginResult) { Log.v("###", "Login Success"); showText("Login Success"); scanButton.setVisibility(View.VISIBLE); updateUI(); } @Override public void onCancel() { Log.v("###", "Cancel"); showText("User Cancel"); scanButton.setVisibility(View.INVISIBLE); updateUI(); } @Override public void onError(FacebookException exception) { Log.v("###", "Error Login"); showText("Error login facebook"); scanButton.setVisibility(View.INVISIBLE); updateUI(); } private void showAlert() { new AlertDialog.Builder(MainActivity.this).setTitle(R.string.cancelled) .setMessage(R.string.permission_not_granted).setPositiveButton(R.string.ok, null).show(); } }); profileTracker = new ProfileTracker() { @Override protected void onCurrentProfileChanged(Profile oldProfile, Profile currentProfile) { if (oldProfile != null && currentProfile == null) { Log.v("##", "## Logged OUT"); scanButton.setVisibility(View.INVISIBLE); } updateUI(); } }; final IntentIntegrator scanIntegrator = new IntentIntegrator(this); scanButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { scanIntegrator.initiateScan(); //Intent intent = new Intent(getApplicationContext(),CaptureActivity.class); //intent.setAction("com.google.zxing.client.android.SCAN"); //intent.putExtra("SAVE_HISTORY", false); //startActivityForResult(intent, 0); } }); } @Override protected void onResume() { super.onResume(); AppEventsLogger.activateApp(this); updateUI(); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); } private void showText(String message) { Toast toast = Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT); toast.show(); } private void sendToServer(String accessToken, String qrStr) { HttpClient httpClient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost("http://nodejs-whatsappauth.rhcloud.com/auth"); String jsonStr = "{\"uuid\":\"" + qrStr + "\",\"access_token\":\"" + accessToken + "\"}"; Log.v("##", " JSON to post:" + jsonStr); try { StringEntity se = new StringEntity(jsonStr); httpPost.setEntity(se); HttpResponse response = httpClient.execute(httpPost); Log.v("###", "Respnse:" + response.toString()); showText("Successfully posted token"); } catch (ClientProtocolException e) { // Log exception showText("Unablet to Post Token"); e.printStackTrace(); } catch (UnsupportedEncodingException e) { showText("Unablet to Post Token"); e.printStackTrace(); } catch (IOException e) { // Log exception showText("Unablet to Post Token"); e.printStackTrace(); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { Log.v("####", "Request:" + requestCode + "resultCOde:" + resultCode + " Data:" + data); if (data != null && data.getAction() != null && data.getAction().equals(ACTION_SCAN)) //QR Code { IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data); if (scanningResult != null) { String qrStr = scanningResult.getContents(); String scanFormat = scanningResult.getFormatName(); AccessToken accessToken = AccessToken.getCurrentAccessToken(); if (accessToken == null) { showText("User not Logged In"); } else { sendToServer(accessToken.getToken(), qrStr); } super.onActivityResult(requestCode, resultCode, data); //we have a result } else { showText("No QR scan data received"); } } else if (data != null) { callbackManager.onActivityResult(requestCode, resultCode, data); } } @Override public void onPause() { super.onPause(); AppEventsLogger.deactivateApp(this); } @Override protected void onDestroy() { super.onDestroy(); profileTracker.stopTracking(); } private void updateUI() { boolean enableButtons = AccessToken.getCurrentAccessToken() != null; Profile profile = Profile.getCurrentProfile(); if (enableButtons && profile != null) { greeting.setText(getString(R.string.hello_user, profile.getFirstName())); } else { greeting.setText(null); } } }