Attempt to invoke virtual method 'int java.lang.Object.hashCode()' in facebook integration
Solution 1
i have resolve this issue after so much R&D. what you need to do is just define facebook APPID in string.xml and use that string in meta data in manifest under application tag.
string.xml
<string name="facebook_app_id">XXXXXX</string>
manifest.xml
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="@string/facebook_app_id"/>
Solution 2
I finally figured out the issue and came up with the fix, the issue was that the login button could not locate the application app id, you just need to put the application id meta tag inside the application tag element.. Thats all
Parth Anjaria
love to do coding, which include maths/physics or any calculation.
Updated on June 12, 2022Comments
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Parth Anjaria almost 2 years
I am getting the following error when I am trying facebook integration:
11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #2 11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: Process: com.creaa.admin.mylogin, PID: 23052 11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference 11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:746) 11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: at java.util.concurrent.ConcurrentHashMap.containsKey(ConcurrentHashMap.java:774) 11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: at com.facebook.internal.Utility.queryAppSettings(Utility.java:822) 11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: at com.facebook.login.widget.LoginButton$1.run(LoginButton.java:489) 11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 11-18 15:57:54.186 23052-23093/com.creaa.admin.mylogin E/AndroidRuntime: at java.lang.Thread.run(Thread.java:818)
Below is my main activity:
public class MainActivity extends Activity { private static String APP_ID = "1500167156975715"; // Replace your App ID here CallbackManager callbackManager; ArrayList<String> permissions; Context cv = this; boolean loginflag = false; private ProfileTracker profiletracker; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //initilise fb sdk FacebookSdk.sdkInitialize(getApplicationContext()); //logout any previous logins AccessToken accessToken = AccessToken.getCurrentAccessToken(); accessToken.setCurrentAccessToken(null); Profile.getCurrentProfile().setCurrentProfile(null); LoginManager.getInstance().logOut(); setContentView(R.layout.activity_main); permissions = new ArrayList<String>(); permissions.add("email"); permissions.add("user_likes"); permissions.add("user_friends"); permissions.add("public_profile"); permissions.add("user_birthday"); try { PackageInfo info = getPackageManager().getPackageInfo( "com.example.facebooklogin", PackageManager.GET_SIGNATURES); for (Signature signature : info.signatures) { MessageDigest md = MessageDigest.getInstance("SHA"); md.update(signature.toByteArray()); Log.d("Parth", "KeyHash : " + Base64.encodeToString(md.digest(), Base64.DEFAULT)); } } catch (NameNotFoundException e) { } catch (NoSuchAlgorithmException e) { } callbackManager = CallbackManager.Factory.create(); LoginButton loginbutton = (LoginButton) findViewById(R.id.login_button); loginbutton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub if (AccessToken.getCurrentAccessToken() != null && Profile.getCurrentProfile() != null) { if (loginflag) { AccessToken accessToken = AccessToken.getCurrentAccessToken(); accessToken.setCurrentAccessToken(null); Profile.getCurrentProfile().setCurrentProfile(null); Toast.makeText(cv, "Logout", Toast.LENGTH_SHORT).show(); LoginManager.getInstance().logOut(); } } else { if (!loginflag) { Toast.makeText(cv, "Login", Toast.LENGTH_SHORT).show(); LoginManager.getInstance().logInWithReadPermissions(MainActivity.this, permissions); } } } }); loginbutton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() { @Override public void onSuccess(LoginResult result) { // TODO Auto-generated method stub Toast.makeText(cv, "in onSucess", Toast.LENGTH_SHORT).show(); //get account details GraphRequest request = GraphRequest.newMeRequest(result.getAccessToken(), new GraphJSONObjectCallback() { @Override public void onCompleted(JSONObject object, GraphResponse response) { // TODO Auto-generated method stub Log.d("Parth", response.toString() + "\njson" + object.toString()); try { String email = (String) object.get("email"); Toast.makeText(cv, email, Toast.LENGTH_SHORT).show(); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }); Bundle parameters = new Bundle(); parameters.putString("fields", "id,name,email,gender,birthday"); request.setParameters(parameters); request.executeAsync(); } @Override public void onError(FacebookException error) { // TODO Auto-generated method stub Toast.makeText(cv, "in onError", Toast.LENGTH_SHORT).show(); } @Override public void onCancel() { // TODO Auto-generated method stub Toast.makeText(cv, "in oncancel", Toast.LENGTH_SHORT).show(); } }); profiletracker = new ProfileTracker() { @Override protected void onCurrentProfileChanged(Profile oldProfile, Profile currentProfile) { // TODO Auto-generated method stub if (currentProfile != null) { Toast.makeText(cv, "in Currentprofilechanged", Toast.LENGTH_SHORT).show(); String name = currentProfile.getName(); String fname = currentProfile.getFirstName(); Toast.makeText(MainActivity.this, fname, Toast.LENGTH_SHORT).show(); } } }; } }
Below is the app gradle:
apply plugin: 'com.android.application' android { compileSdkVersion 23 buildToolsVersion "23.0.2" defaultConfig { applicationId "com.creaa.admin.mylogin" minSdkVersion 15 targetSdkVersion 23 versionCode 1 versionName "1.0" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } repositories { mavenCentral() } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:23.1.1' compile 'com.facebook.android:facebook-android-sdk:4.6.0' }
Below is the manifest file:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.creaa.admin.mylogin" > <uses-permission android:name="android.permission.INTERNET"/> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme" > <activity android:name=".MainActivity" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="com.facebook.FacebookActivity" android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation" android:label="@string/app_name" android:theme="@android:style/Theme.Translucent.NoTitleBar" /> <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="1500167156975715"/> <provider android:name="com.facebook.FacebookContentProvider" android:authorities="com.facebook.app.FacebookContentProvider233936543368280" android:exported="true" /> </application> </manifest>
I have tried all possible things but I can't figure out the error. It would be very kind if anyone could help me with this problem. I have just shifted from eclipse to android studio. This code was working in eclipse just fine but it isn't working in android studio.
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Parth Anjaria over 8 yearsit is inside the application tag.
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Izuchukwu Oleka over 8 yearsNope am not talking about the Facebook activity.. But the Facebook meta-data tag <meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id" />