ChatApp

Libraries used dependencies used:-

1. 'com.android.support:appcompat-v7:23.4.0'
2. 'com.android.support:design:23.4.0' //for the material design
3. files('libs/volley.jar') // for the calling rest api for gcm and storing its token and Sign up services
4. "com.google.android.gms:play-services:8.4.0" // for GCM
5. 'com.android.support:cardview-v7:23.4.0'
6. 'com.google.android.gms:play-services-drive:8.4.0' //for google drive api

for GCM class used:_ 1.GCMPushReceiverService.java 2. GCMRegistrationIntentService.java 3.GCMTokenRefreshListenerService.java So just change the gcm_falut SenderId in the string.xml according to project id in the console 319322556887

        Services used:-
        
        1. GCMRegId.php
        2. gcm.php
        3. send.php
        so just edit the api_key value in the send.php that is generated from Google Api console
       -Add the google-services.json generated from the console
       
       
  for Google Drive Api for storing and retreiving back the messages :-      
  1.ApiClientAsyncTask.java
  2. BaseDemoActivity.java
  3.CreateFileActivity.java
  4.RetrieveContentsActivity.java
  dependency used :- 'com.google.android.gms:play-services-drive:8.4.0'
  you need to generate :-
  1 Sha1  
  2. oath2 Authentication in the console 
  
  main pin points:-
              DriveId driveId = result.getDriveFile().getDriveId();
              driveId.getResourceId() ; //it gives null after waiting too much time 
              what I have done After reading GDAA
              
              
                Drive.DriveApi.getFile(getGoogleApiClient(), driveId).addChangeListener(getGoogleApiClient(), mChgeLstnr);
final private ChangeListener mChgeLstnr = new ChangeListener() {
    @Override
    public void onChange(ChangeEvent event) {
        BaseDemoActivity.EXISTING_FILE_ID=""+event.getDriveId().getResourceId(); // this trigger it and we have the resource id and we set it to file id so it will retrive content from there 



    }
};
for stroring Json format used:_
 JSONArray jsonArray=new JSONArray();




                    for(int i=0;i<userMessageList.size();i++){
                        MessageEntity messageEntity=userMessageList.get(i);
                        JSONObject messageObject = new JSONObject();
                        messageObject.put("message", messageEntity.getMessage());
                        messageObject.put("useremail", messageEntity.getUseremail());
                        messageObject.put("username",  messageEntity.getUsername());
                        messageObject.put("recieveremail", messageEntity.getRecieveremail());
                        messageObject.put("recievername",messageEntity.getRecievername() );
                        messageObject.put("token",messageEntity.getToken());
                        messageObject.put("id", messageEntity.getId());
                        jsonArray.put(messageObject);



                    }

                    writer.write(""+jsonArray);
                    writer.close();
                } catch (IOException e) {
                    Log.e(TAG, e.getMessage());
                } catch (JSONException e) {
                    e.printStackTrace();
                }


    <a href="https://github.com/007spectre/ChatAppBuyHatke/blob/master/Sample/New%20file.txt">Sample of Json uploaded to google drive</a>






for saving the data or to reduce app size  I have used TinyPng:-
<a href="https://tinypng.com/">Tiny Png for App Size</a>




for Storing data Locally:-
  SQLiteHandler.java 
  queries used:
  
  1.For retrieving user messages 
	Cursor cursor = db
			.rawQuery(
					"select * from message where useremail='" + email + "' OR recieveremail='" + email + "'", null);
             // to retrieve user  messages from the user table according to email whether it can be either useremail or recieveremail
             
    2. for Search:_
    		Cursor cursor = db
			.rawQuery(
					"select * from message where message like '%"+message+"%'", null);
              // message from message table according to user type in text by Like query
	  
Material Design concept:_
1. Sliding Tab Layout
2. Recyler View
3. Card View 

Validation check:-
1. Email type validation
2. Blank test validation

Other Concepts:
1. RoundImageView
2. Webview
3. Connection Dectector for checking the internet
4. Fragments

##Screenshots

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