Develop Reference

Connection Loss Handling in AsyncTask in Android

In My application i have read all the record from the DataBase SqlServer by using REST API.But there is some problem when connection loss at intermediate execution of protected DetailsTimeTable doInBackground(String... params). Then my app closed with error Unfortunately app has stopped
Here is my Code:
public class Monday_Time extends ListActivity {
ArrayList<String> itemsList = new ArrayList<String>();
private ProgressDialog progressDialog;
private BroadcastReceiver mconn;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.time_table_list);
// Bundle bundle = getIntent().getExtras();
Toast.makeText(this, MainActivity.branch_static, Toast.LENGTH_LONG).show();
// registerReceiver(new NetworkBroadCast(), new IntentFilter(ConnectivityManager.EXTRA_IS_FAILOVER));
mconn = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
boolean noConnectivity = intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
String reason = intent.getStringExtra(ConnectivityManager.EXTRA_REASON);
boolean isfailOver = intent.getBooleanExtra(ConnectivityManager.EXTRA_IS_FAILOVER, false);
NetworkInfo currentNetworkInfo = (NetworkInfo) intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
NetworkInfo otherNetworkInfo = (NetworkInfo) intent.getParcelableExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO);
Log.d("Connectivity", Boolean.toString(noConnectivity));
Log.d("Reson ", reason);
Log.d("FailOver", Boolean.toString(isfailOver));
}
};
registerReceiver(mconn, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
new AsyncDetailsTimeTable().execute(MainActivity.branch_static.trim(), MainActivity.sem_static.trim(), MainActivity.sec_static.trim(), "Monday");
}
public class AsyncDetailsTimeTable extends AsyncTask<String, Void, DetailsTimeTable> {
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
progressDialog = new ProgressDialog(Monday_Time.this);
progressDialog.setMessage("Loding Time Table....");
progressDialog.setIndeterminate(false);
progressDialog.setCancelable(false);
progressDialog.show();
}
#Override
protected void onPostExecute(DetailsTimeTable result) {
// TODO Auto-generated method stub
// Log.d("POST DATA", result.getFirst());
progressDialog.dismiss();
if (SSTCTimeTableTabActivity.ram == 1) {
AlertDialog.Builder builder = new AlertDialog.Builder(Monday_Time.this);
builder.setMessage("Time Table is not availble....")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// do things
startActivity(new Intent(Monday_Time.this, com.src.sstctimetable.MainActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
}
});
AlertDialog alert = builder.create();
alert.show();
} else {
itemsList.add("1:: " + result.getFirst());
itemsList.add("2:: " + result.getSecond());
itemsList.add("3:: " + result.getThird());
itemsList.add("4:: " + result.getFourth());
itemsList.add("5:: " + result.getFifth());
itemsList.add("6:: " + result.getSixth());
itemsList.add("7:: " + result.getSeventh());
setListAdapter(new ArrayAdapter<String>(getApplicationContext(), R.layout.rowlayout, R.id.label, itemsList));
}
super.onPostExecute(result);
}
#Override
protected DetailsTimeTable doInBackground(String... params) {
DetailsTimeTable userDetail = null;
RestAPI api = new RestAPI();
try {
JSONObject jsonObj = api.GetTimeTableDetails(params[0], params[1], params[2], params[3]);
JSONParser parser = new JSONParser();
userDetail = parser.parseUserDetails(jsonObj);
} catch (Exception e) {
// TODO Auto-generated catch block
Log.d("AsyncUserDetails", e.getMessage());
}
return userDetail;
}
}
}

catch (Exception e) {
// TODO Auto-generated catch block
// Log.d("AsyncUserDetails", e.getMessage());
}
Try to comment Log print. I think e.getmessage() throwing NullPointerException.

How to Show message from Runnable to the MainActivity

I am using the external library SignalR, and I find the Github code in Java I have implemented it successfully and receiving the Log messages such as Connected , Message etc but when I tries to show these messages in the MainActivity EditText and textviews , it is really not working . Following is a code that I modified according to my need now tell me how to modify accordingly in android to receive the messages on Ui.
public class HubClient {
public HubProxy RelayServerHubProxy;
MainActivity mainActivity = new MainActivity();
public HubConnection RelayServerHubConnection;
Context context = null;
public Boolean Connected = false;
public static String ErrorName,ConnectionStatus,MessageReceived;
Logger logger = new Logger() {
#Override
public void log(String message, LogLevel level) {
// TODO Auto-generated method stub
// System.out.println(message);
Log.v("Message Received in Logger", message);
}
};
public HubClient(Context context) {
this.context = context;
mainActivity = new MainActivity();
}
public void Connect(String ServerURI, String SockConnectionType) {
try {
ClientTransport webSockTransport = null;
RelayServerHubConnection = new HubConnection(ServerURI);
// creating hub prox object
RelayServerHubProxy = RelayServerHubConnection
.createHubProxy("MyHub");
// Start the connection
RelayServerHubConnection.start().done(new Action<Void>() {
#Override
public void run(Void obj) throws Exception {
// TODO Auto-generated method stub
Log.v("Connection Status", "Connection done");
}
});
// Subscribe to the error event
RelayServerHubConnection.error(new ErrorCallback() {
public void onError(Throwable error) {
// TODO Auto-generated method stub
error.printStackTrace();
Log.v("WE've GOt erroe", error.getMessage());
ErrorName = error.getMessage();
//mainActivity.ShowToast(error.getMessage());
}
});
// Subscribe to the connected event
RelayServerHubConnection.connected(new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
Log.v("Connected", "Connected");
Connected = true;
// Toast.makeText(mainActivity, "Connected",
// Toast.LENGTH_LONG).show();
}
});
// Subscribe to the closed event
RelayServerHubConnection.closed(new Runnable() {
#Override
public void run() {
// TODO Auto-generated method stub
Log.v("Connection is", "Closed");
}
});
RelayServerHubProxy.subscribe(new Object() {
#SuppressWarnings("unused")
public void messageReceived(String name, String message) {
Log.v("Server Message", name + message);
// Toast.makeText(context, message,
// Toast.LENGTH_LONG).show();
MessageReceived = name+message;
}
});
// Subscribe to the received event
RelayServerHubConnection.received(new MessageReceivedHandler() {
#Override
public void onMessageReceived(JsonElement json) {
//how to show this message on again mainactivity Textview
Log.v("onMessagReceived", json.toString());
}
});
RelayServerHubConnection.stateChanged(new StateChangedCallback() {
#Override
public void stateChanged(ConnectionState oldState,
ConnectionState newState) {
// TODO Auto-generated method stub
if (newState == microsoft.aspnet.signalr.client.ConnectionState.Connected)
{
// how to show Connected status in Textview?
} else if (oldState == microsoft.aspnet.signalr.client.ConnectionState.Disconnected) {
// Show Message here
}
}
});
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
public void SendMessageToServer(String messageToServer1) {
try {
RelayServerHubProxy.invoke("MessageFromClient",
(String) messageToServer1);
RelayServerHubConnection.error(new ErrorCallback() {
public void onError(Throwable error) {
// TODO Auto-generated method stub
error.printStackTrace();
//How to show message of error on Main Activity ?
}
});
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
Log.v("Exception", e.toString());
}
}
}
Now I have commented what I want in the functions. Notice that All function is using Runnable . So please tell me how to modify this to use in android

To show an alertDialog paste this function in your HubClient object:
private void showError(final String message) {
((Activity)context).runOnUiThread(new Runnable() {
public void run() {
new AlertDialog.Builder(context)
.setTitle("Error")
.setMessage(message)
.setPositiveButton("Ok", null)
.show();
}
});
}
You can call it inside your error callback
To show a message in a TextView use this one:
private void updateTextView(final String message) {
((Activity)context).runOnUiThread(new Runnable() {
public void run() {
// mTextView must be referenced by HubClient
mTextView.setText(message);
}
});
}

Android Share Image from Phone Gallery to Facebook using Facebook API

I am trying to have my Android Application share a URI image to facebook. When using the picture parameter, it forces you to use a URL of a picture. Since I am trying to share from my phones gallery, I was wondering if there was a way to have a URI read like a URL, or any other way to do this. Any suggestions?
UPDATE: I have updated this by adding my code that I am attempting to use. I understand that I am not using the newly rolled out API of Facebook. I just want to be able to post a picture from my phone gallery to Facebook, and not a picture from URL. Thank you!
private String[] arrPath;
int id = viewIt.getId();
if(facebook.isSessionValid()) {
Bundle params = new Bundle();
params.putString("name", "AndroidApp");
params.putString("caption", "Application for Android");
params.putString("description", "This is a description");
params.putString("link", "http://www.google.com/");
params.putString("picture", "file://" + arrPath[id]);
facebook.dialog(AndroidClass.this, "feed", params, new DialogListener() {
#Override
public void onFacebookError(FacebookError e) {
// TODO Auto-generated method stub
}
#Override
public void onError(DialogError e) {
// TODO Auto-generated method stub
}
#Override
public void onComplete(Bundle values) {
// TODO Auto-generated method stub
}
#Override
public void onCancel() {
// TODO Auto-generated method stub
}
});
}else {
facebook.authorize(AndroidClass.this, new String[] {"email", "publish_stream"}, new DialogListener() {
#Override
public void onFacebookError(FacebookError e) {
// TODO Auto-generated method stub
Toast.makeText(AndroidClass.this, "fberror", Toast.LENGTH_SHORT).show();
}
#Override
public void onError(DialogError e) {
// TODO Auto-generated method stub
Toast.makeText(AndroidClass.this, "onError", Toast.LENGTH_SHORT).show();
}
#Override
public void onComplete(Bundle values) {
// TODO Auto-generated method stub
Editor editor = sp.edit();
editor.putString("access_token", facebook.getAccessToken());
editor.putLong("access_expires", facebook.getAccessExpires());
editor.commit();
}
#Override
public void onCancel() {
// TODO Auto-generated method stub
Toast.makeText(AndroidClass.this, "onCancel", Toast.LENGTH_SHORT).show();
}
});
}
}
});

You could open a stream to the image from the URI and post it that way using ContentResolver.
Session session = Session.getActiveSession();
Bitmap photo = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));
Request request = Request.newUploadPhotoRequest(session, photo, new Request.Callback());
RequestAsyncTask task = new RequestAsyncTask(request);
task.execute();

Android : Facebook Logout

I have a LoginViaFacebook Acitivity and a login button for facebook Login.I use the following code to login to facebook
private String[] permissions = {"publish_stream",
"read_stream", "user_photos", "publish_checkins", "photo_upload",
"email", "user_birthday" };
if (access_token != null) {
Utility.fb.setAccessToken(access_token);
token = access_token;
Log.e("OnCretae Facebook Token------------", token);
}
if (expires != 0) {
Utility.fb.setAccessExpires(expires);
}
btn_login.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if (CheckInternet.checkConn(LoginViaFacebook.this)) {
Utility.fb.authorize(LoginViaFacebook.this, permissions,
new DialogListener() {
#Override
public void onFacebookError(FacebookError e) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(),
"onFacebookError",
Toast.LENGTH_LONG).show();
Log.e("Sajolllllllllllllllll", e + "");
}
#Override
public void onError(DialogError e) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(),
"onError", Toast.LENGTH_LONG)
.show();
Log.e("Sajolllllllllllllllll", e + "");
}
#Override
public void onComplete(Bundle values) {
// TODO Auto-generated method stub
editor = sp.edit();
token = Utility.fb.getAccessToken();
Log.e("Token---------", token);
editor.putString("access_token",
Utility.fb.getAccessToken());
editor.putLong("access_expires",
Utility.fb.getAccessExpires());
editor.commit();
Toast.makeText(getApplicationContext(),
"Login Successful",
Toast.LENGTH_LONG).show();
mProgress = ProgressDialog.show(
LoginViaFacebook.this, "",
"Please Wait...", true);
Thread t = new Thread(retriveProfileData);
t.start();
}
#Override
public void onCancel() {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(),
"onCancel", Toast.LENGTH_LONG)
.show();
}
});
}
}
});
I save the access token to login next time directly if user not logout
I have another activity namely Settings and have button Logout.I use following code to logout from facebook
lagoutLayout.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
final String[] items = new String[] { "Yes", "No" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
SettingsActivity.this,
android.R.layout.select_dialog_item, items);
AlertDialog.Builder builder = new AlertDialog.Builder(
SettingsActivity.this);
builder.setTitle("Select Option");
builder.setAdapter(adapter,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) { // pick
// from
// camera
if (item == 0) {
try {
editor.remove("FacebookId");
editor.remove("EmailId");
editor.commit();
Log.e("Pre----------------", sp1
.getString("access_token", "d"));
editor1.remove("access_token");
editor1.remove("access_expires");
editor1.commit();
Log.e("After----------------", sp1
.getString("access_token", "d"));
Log.e("DATATTAT--------",
sp.getString("FacebookId",
"saf")
+ " "
+ sp.getString(
"EmailId", "as"));
String r = Utility.fb
.logout(SettingsActivity.this);
Log.e("Res-----------", r);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else { // pick from file
dialog.dismiss();
}
}
});
dialog = builder.create();
dialog.show();
}
});
The response from Facebook Logout method show true in Log.
But when i again run application it will automatically login to facebook
I can'nt find out the problem.Please help me

I use this code and it worked fine
public void logout() {
if (!isConnected(activity)) {
Toast.makeText(activity, "Internet not connected", Toast.LENGTH_LONG).show();
return;
}
SessionEvents.onLogoutBegin();
AsyncFacebookRunner asyncRunner = new AsyncFacebookRunner(this.facebook);
asyncRunner.logout(this.context, new LogoutRequestListener());
}
And here is the listener
public class LogoutRequestListener extends BaseRequestListener {
public void onComplete(String response, final Object state) {
// callback should be run in the original thread,
// not the background thread
mHandler.post(new Runnable() {
public void run() {
SessionEvents.onLogoutFinish();
Intent intent= new Intent(activity,Login.class);
activity.startActivity(intent);
activity.finish();
}
});
}
}

For facebook sdk version 3 above
public void logoutFacebook() {
Session session = Session.getActiveSession();
if(session != null && session.isOpened()){
session.closeAndClearTokenInformation();
}
}

if you are extending and using facebook openSession when logging you must close it using closeSession and put it in your logout or you can simply put it onDestroy just like this
public void onDestroy() {
this.closeSession();
super.onDestroy();
}

Try this :
I hope this will be help to you...
if (mFacebook.isSessionValid()) {
try {
String str = mFacebook.logout(getApplicationContext());
SessionStore.clear(getApplicationContext());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

If you are viewing this answer from google suggestion and using facebook sdk v4 or above, just use this lines. It works perfectly.
if (AccessToken.getCurrentAccessToken() != null) {
LoginManager.getInstance().logOut();
}

Facebook Android SDK, posting feed through feed dialog by defining predefined content

Its strange that I am using right code to make dialog with predefined content. But it isn't working :( guide me if I am wrong, thanks
Code:
Bundle params = new Bundle();
params.putString("message", "Predef Message");
Facebook facebook = new Facebook("APP_ID");
facebook.dialog(this, "feed", params, new DialogListener(){
#Override
public void onComplete(Bundle values) {
// TODO Auto-generated method stub
}
#Override
public void onFacebookError(FacebookError e) {
// TODO Auto-generated method stub
}
#Override
public void onError(DialogError e) {
// TODO Auto-generated method stub
}
#Override
public void onCancel() {
return;
}});

I found that we can't predefined a message for posting on wall, check this https://developers.facebook.com/docs/reference/androidsdk/dialog/ it requires user interaction
Message for Post on wall, Share a link or any else require user interaction. So a workaround is share a link and add description to it :)

Try this it is work for me
public void postfb() {
Log.i("PostFB", "POST FB ENTERED..!!");
Facebook facebook;
// facebook = new Facebook(InfrqncyApplication.APP_ID);
facebook = new Facebook(APP_ID);
// replace APP_API_ID with your own
facebook.authorize(getActivity(), new String[] { "publish_stream",
"offline_access" }, null);
Bundle params = new Bundle();
params.putString("link", imagePostPath);
params.putString("name", etxtTitle.getText().toString().trim());
// params.putString("caption","Via Sharesi.es");
params.putString("description", etxtDescription.getText().toString());
params.putString("picture", imagePostPath);
facebook.dialog(getActivity(), "stream.publish", params,
new DialogListener() {
#Override
public void onComplete(Bundle values) {
final String postId = values.getString("post_id");
if (postId != null) {
Toast.makeText(getActivity(),
"Posted sucessfully !", Toast.LENGTH_SHORT)
.show();
AddPost();
} else {
Log.d("FB Sample App", "Canceled by User");
}
}
#Override
public void onFacebookError(FacebookError error) {
AddPost();
Log.e("fb", "fb error" + error);
}
#Override
public void onError(DialogError e) {
AddPost();
Log.e("fb", "fb dialog error" + e.getLocalizedMessage());
}
#Override
public void onCancel() {
AddPost();
}
});
}