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POException: class cannot be cast to android.app.activity
 

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  1. POException: class cannot be cast to android.app.activity
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    <p>I want to extend another class not Activity in my android app. But when I run the application after initializing it in manifest file it shows the exception <code>class cannot be cast to android.app.activity</code> how can I solve this problem? Edited : This is my class file SessionLoginSampleActivity.java which calls FacebookSignIn </p> <pre><code> public class SessionLoginSampleActivity extends Activity { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS); Session session = Session.getActiveSession(); if (session == null) { if (savedInstanceState != null) { session = Session.restoreSession(this, null, statusCallback, savedInstanceState); } if (session == null) { session = new Session(this); } Session.setActiveSession(session); if (session.getState().equals(SessionState.CREATED_TOKEN_LOADED)) { session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback)); } } updateView(); } @Override public void onStart() { super.onStart(); Session.getActiveSession().addCallback(statusCallback); } @Override public void onStop() { super.onStop(); Session.getActiveSession().removeCallback(statusCallback); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); Session session = Session.getActiveSession(); Session.saveSession(session, outState); } private void updateView() { Session session = Session.getActiveSession(); if (session.isOpened()) { startActivityForResult(new Intent(SessionLoginSampleActivity.this, FacebookSignIn.class), 100); } else{ onClickLogin(); } } private void onClickLogin() { Session session = Session.getActiveSession(); if (!session.isOpened() &amp;&amp; !session.isClosed()) { session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback)); } else { Session.openActiveSession(this, true, statusCallback); } } private void onClickLogout() { Session session = Session.getActiveSession(); if (!session.isClosed()) { session.closeAndClearTokenInformation(); } } @Override protected void onResume() { super.onResume(); } private class SessionStatusCallback implements Session.StatusCallback { @Override public void call(Session session, SessionState state, Exception exception) { updateView(); } } } </code></pre> <p>FacebookSignIn.java</p> <pre><code> public class FacebookSignIn extends FacebookFragment{ public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); fetchUserInfo(); if(databaseExists()!=false) { if(!checkValidUser()!=true){ Intent intent = new Intent(getActivity(),UserAccount.class); startActivity(intent); /*Sending some arguments*/ Bundle bundle = new Bundle(); bundle.putString("UserName",strUserName); bundle.putString("Id", strEmailId); intent.putExtras(bundle); this.startActivity(intent); }}} private boolean databaseExists(){ SQLiteDatabase checkDB = null; try { String myPath = DB_PATH + DATABASE_NAME; checkDB = SQLiteDatabase.openDatabase(myPath, null,SQLiteDatabase.OPEN_READONLY); if(checkDB != null){ System.out.println("DataBase Exists"); checkDB.close(); return true; }else{ //database does not exist return false; } } catch (Exception e){ //database does not exist return false; }} private Boolean checkValidUser(){ Cursor cursor = null; try{ cursor = database.rawQuery("SELECT loginId, emailAddress FROM UserDetails WHERE loginId = '"+NAME+"' AND emailAddress = '"+ID+"'", null); if (cursor != null ) { if (cursor.moveToFirst()){ strUserName = cursor.getString(cursor.getColumnIndex("loginId")); strEmailId = cursor.getString(cursor.getColumnIndex("emailAddress")); }} }catch (Exception e) { Log.e(getClass().getSimpleName(), "Could not create or Open the database"); }finally { if(cursor != null &amp;&amp; !cursor.isClosed()) cursor.close(); } return true; } private void fetchUserInfo() { final Session currentSession = getSession(); if (currentSession != null &amp;&amp; currentSession.isOpened()) { if (currentSession != userInfoSession) { Request request = Request.newMeRequest(currentSession, new Request.GraphUserCallback() { @Override public void onCompleted(GraphUser me, Response response) { if (currentSession == getSession()) { user = me; updateUI(); } if (response.getError() != null) { //loginButton.handleError(response.getError().getException()); }}}); Bundle parameters = new Bundle(); parameters.putString(FIELDS, REQUEST_FIELDS); request.setParameters(parameters); Request.executeBatchAsync(request); userInfoSession = currentSession; } } else { user = null; }} private void updateUI() { if (!isAdded()) { return; } if (isSessionOpen()) { // connectedStateLabel.setTextColor(getResources().getColor(R.color.com_facebook_usersettingsfragment_connected_text_color)); // connectedStateLabel.setShadowLayer(1f, 0f, -1f, // getResources().getColor(R.color.com_facebook_usersettingsfragment_connected_shadow_color)); if (user != null) { ImageRequest request = getImageRequest(); if (request != null) { URI requestUrl = request.getImageUri(); // Do we already have the right picture? If so, leave it alone. //if (!requestUrl.equals(connectedStateLabel.getTag())) { if (user.getId().equals(userProfilePicID)) { } else { ImageDownloader.downloadAsync(request); }}}}} private ImageRequest getImageRequest() { ImageRequest request = null; try { ImageRequest.Builder requestBuilder = new ImageRequest.Builder( getActivity(), ImageRequest.getProfilePictureUrl( user.getId(), getResources().getDimensionPixelSize(R.dimen.com_facebook_usersettingsfragment_profile_picture_width), getResources().getDimensionPixelSize(R.dimen.com_facebook_usersettingsfragment_profile_picture_height))); request = requestBuilder.setCallerTag(this) .setCallback( new ImageRequest.Callback() { @Override public void onCompleted(ImageResponse response) { processImageResponse(user.getId(), response); }}) .build(); } catch (URISyntaxException e) { } return request; } private void processImageResponse(String id, ImageResponse response) { if (response != null) { Bitmap bitmap = response.getBitmap(); if (bitmap != null) { BitmapDrawable drawable = new BitmapDrawable(FacebookSignIn.this.getResources(), bitmap); drawable.setBounds(0, 0, getResources().getDimensionPixelSize(R.dimen.com_facebook_usersettingsfragment_profile_picture_width), getResources().getDimensionPixelSize(R.dimen.com_facebook_usersettingsfragment_profile_picture_height)); userProfilePic = drawable; userProfilePicID = id; } } }} </code></pre>
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    1. PTQuestion
    1. USRobert
    1. USRobert
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    1. PO
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      1. POException: class cannot be cast to android.app.activity
      1. This table or related slice is empty.
      1. VTUpMod
    1. COYou are using your class as an activity. but it isn't. If you don't show us code it is impossible to say _where_ you are going wrong, but basically it should be obvious that if you use something just the way you would use an activity, then it might just need to be one (or be one of its childs)
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      1. POException: class cannot be cast to android.app.activity
      1. USNanne
    2. COAre you sure "UserAccount" is your Activity??? And you are not trying to add FacebookSignIn to your manifest file.
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      1. POException: class cannot be cast to android.app.activity
      1. USPiyush
    3. CONo, exception raised When I call FacebookSignIn in SessionLoginSampleActivity
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      1. POException: class cannot be cast to android.app.activity
      1. USRobert
 

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