Telegram messenger for Android

When the device has no network or is in offline mode the code enters in a loop, attempting (and obviously failing) to ping the servers. This brings to 100% CPU usage and battery drain. This patch simply avoids to reschedule a connection attempt when there is no network.

A typo in a log message has been also fixed.

Telegram is the only chat application that inverts the order of messages in the notifications. I added an option in the notification settings to allow the user to select which order they want their messages to appear.

I (@geertw and @NielsdeBlaauw) have made a professional Dutch translation for Telegram, courtesy by @interexperts. We have thorougly reviewed our translation and we are sure that it is correct, consistent and has the right attitude towards Dutch natives. Thank you for considering our merge!

I have implemented some features that people usually request to Support Force Team:

1. Confirmation when creating a new secret chat: according to issue #241
2. Confirmation when sharing contact info: As it is an option that appears on top of chat when contact don't know your number, I think (and so do some other member of Spanish Support Force) that it is a good idea to ask for confirmation, to avoid unintentionally clicks.
3. Only wifi Automatic Download: As an option in settings for Audio and photos, according to issue #146. It can also be helpful to save data, when then people, like me, have a limit of 1GB or even less.
4. Add Version Info in Settings: A new section have been added in settings (at the bottom) that shows currently version name, according to issue #391.
5. Show/Hide Last Connection: This is the hardest one because with current API the only way (the one I used) is to avoid client sending "online" notification to servers, so other users can't know if I am online; they will only know the time when I decided to hide it as my "last connection time". According to this, this feature is client dependent so if using another client without this feature, this client will send "online" info and contact wil know it.
6. Finally I added some strings needed to strings.xml (in English and Spanish).

There are some changes in build.gradle that I needed in order to compile my app correctly, but don't think they are needed in official version (except changing version number).

This file is a Catalan Translation ("values-ca") For Catalan people. WhatsApp is not translated to Catalan and this must bé a good feature to Telegram.By the way, What about to change language from Setttings menu?Not all devices have Catalan system option and choosing from menu can solve this issue with Telegram App.Kind Regards Escufi

I first fixed a hard-coded string in SettingsActivity.java externalizing it to resources XML files (warning, in values-ar I put it in English).

Then I created the Catalan translation from scratch.

[BUG] after call this method, when MessagesLed and GroupLed row fit in a same screen both of them display in a same color.

Because of Issues section is disabled I had to propose that here.

1. Added a new table in database for blocked contacts
2. Bocked contacts list in setting now make use of previous database.
3. When seeing the profile of a blocked contact, now appear the option to "unblock" it instead of "block" one.
4. Added support for more than 200 blocked contact (not tested as I don't have so many blocked contacts).
5. When blocking/unblocking a contact, de table in database is updated and a notification posted (also when loading MessagesActivity.java).
6. In Contact Profile Activity, the menu bar is forced to be created/modified by the UIthread (to avoid problems when need to be modified)
7. Added comment to the methods I have added.

I have added the ability to change the notification light for private chats and group chats. Additionally the color can be changed for each individual user/group.

It would be nice to see this in the next version :)

In oficial telegram for android it exists problem,when it impossible accept or decline calls with talkback,if we have android seven or lower,I.E when blind users do double tap,it nothing happends,because we not get action AccessibilityNodeInfo.ACTION_CLICK in method of custom view performAccessibilityAction and in method onTouchEvent of custom view we should be use super version of this method,I.E super.onTouchEvent and we should set clickable true in constructor of class CallSwipeView. Also in telegram,when someone busy and decline our call,instead of contentDescription with CallAgain string name we have contentDescription with VoipEndCall string name,so blind users consider,that after pressing of this button window of call in telegram probably will be closed,I.E as it works,when user press cancel button,but instead of this call start again,so it should be fixed,because it misleadin of blind users of telegram. Also in this pull request was fixed error 87,which happends,for example,if we compile telegram in android studio in windows.

if you try to upload an image from your Google backup for example (ie is not in your local storage) i'ts doing nothing. After this fix it works: the changes for uploading image are made only in ChatActivity and Wallpaper one.. Are you using image upload elsewere?

for more infos: https://developer.android.com/guide/topics/providers/document-provider.html#client at the paragraph Open a document -> Bitmap

This pull request fixes an issue where searching for the "from:" keyword in the ActionBar would cause the app to crash. The issue was caused by attempting to access a line in the layout that did not exist. The solution is to add a check to ensure that the line offset is within the bounds of the layout before attempting to access it. This fix will prevent the app from crashing when searching for "from:" in the ActionBar.

When user changes theme in the chat settings by clicking on Switch to Day Mode or Switch to Night Mode button, the button icon in the drawer doesn't change.

Steps to reproduce:

1. Go to Chat Settings in the settings menu.
2. In the chat settings, change theme by clicking on Switch to Day Mode or Switch to Night Mode.
3. After changing the theme come back to initial page (LaunchActivity).
4. Open the drawer and check the theme button in the drawer, (it shows wrong image (sun instead of moon or moon instead of sun)).
5. Now change the theme from drawer button the button animation doesn't trigger.

Since connection will be reset to USE_IPV4_IPV6_RANDOM when connection failed even in pure v4 environment.

https://github.com/DrKLO/Telegram/blob/0e17caa7a6facd8220077ee708c4acc942a175d1/TMessagesProj/jni/tgnet/Connection.cpp#L699-L702

However, it does not reset lastProtocolUsefullData correctly if connectionType is not ConnectionTypeGeneric (usually problem occurs when ConnectionTypeGenericMedia) and lastProtocolUsefullData will be set false only here.

https://github.com/DrKLO/Telegram/blob/0e17caa7a6facd8220077ee708c4acc942a175d1/TMessagesProj/jni/tgnet/Connection.cpp#L299-L311

So it always connect as ipv6 if lastProtocolUsefullData is true and RAND_bytes got 0, 3, 6 even there is no ipv6 capability.

I try to fix it using always reset lastProtocolUsefullData to false when USE_IPV4_IPV6_RANDOM is meet.

When you try to forward any message from topic to a topic, the screen becomes black if you use Alternative navigation. We have to use animation start and end to fix this issue