I'm studying only recently Android.
I do not know if it's me, but I do not understand the Android sudio documentation regarding the contacts, I tried reading the few guides about it, and other articles, but I could not understand how it works.
Now I am only able to read some contacts and their information, but without being able to modify and delete them.
My purpose is to create a synchronization of contacts service.
The data to whom they are interested are: Name Number (Home, Work, Mobile, Mail).
If no one knows how to read the data correctly, edit, delete and create them would be very grateful, perhaps with a sample code.
Thank you.
You can get all the information from below link.
https://developer.android.com/guide/topics/providers/contacts-provider.html
Related
I consider myself an accomplished programmer, but I'm relatively new to Android App development. I'm creating an application that will store information into the SQLite database used in Android. What I'd like to be able to do is be able to take a query of that data and export it either as a file of some sort or just send it to another iteration of the same application on a different phone. Then be able to have that phone import the same information into its own database, seeing that the information should line up correctly as long as it keeps it.
Can anyone provide some good starting examples of how I would best go about this and/or tutorials on how to go about doing it? Right now I'm just not sure how to get started and I could use some help to push me in the right direction, so I'd really appreciate the help.
Thank you ahead of time to anyone who replies.
and export it either as a file
depends on what kind of data you have. You can write any kind of text-based data using a RandomAccessFile for example.
send it to another iteration of the same application on a different
phone
You will need to have your own backend to do so. You could identify the target device by using GCM
I am making an android app for a survey. The answers are saved in a file, and that file should be sent to the web, so we can analyse the data. I am searching for a way to put the data on the web, in such a way that only I can access it.
I've tried google doc's, but it seems to me that if too many people upload their data at the same time, some data might get overwritten.
I've also tried dropbox, but the problem is the authentication step. Since every person would have emailadres and password, everyone would have access to all data, which should not be possible (unless there is a way to authenticate in the code, but I haven't found anything on that).
Does anyone have an idea what I can do? Thank you!
You shouldn't use a Google Document directly. With a lot of traffic you'll definitely get overwritten data. You're also vulnerable to someone messing with the data since you'll need the document to be public so people can edit it.
What you want to do is create a Google Form and then have your application POST the data to that. Google will handle making sure that no data is overwritten for you.
I am having trouble finding an API that will allow me to read in GTFS data. After much searching I was able to find and run This code, but there is not really much of an explanation. I am ultimately having trouble trying to figure out how to get information and display it in .xml layouts.
Question:
Do I need to create another class with an onCreate method and call these other classes?
Does this program not require me to load values into a database?
Where can I find an API that would help me understand how to read in, parse, and display values.
There is nothing in the source of xml, manifest, not even MainActivity.java or any activity
so there is not much thing you could do besides using the class which you're totally
capable to do it yourself by reading spec.
Question:
1. Do I need to create another class with an onCreate method and call
these other classes?
There is no activity, so no onCreate, no calling methods, nothing.
2. Does this program not require me to load values
into a database?
Same as question one.
3. Where can I find an API that would help me understand how to read in, parse, and
display values.
You could really just implement this by following the spec all by yourself. It's really simple.
Anyway, I made an example for you so you could use git clone to get the source code and do
whatever you like.
https://github.com/cwhsu1984/GtfsDemo.git
Look at https://developers.google.com/transit/gtfs/ for more GTFS specs
That project was a piece of a project built in a class project that I wanted to open source. Other team members didn't believe the open source model as I did.
If I recall, what I did was make a sqlite DB of the GTFS data, and in a activity pull info from the DB.
I'm sorry, in frustration with the team, I pretty much deleted all the code I had ;)
Also, I haven't touched Android since, soo.... Sorry I can't help.
By any chance, is there anyone who can help me? As currently I am doing my major project, and also a beginner in android and java. I am doing the login function for my project. I took
reference from here. However, one problem that I am facing now is I do not know how to grab the details (name and email column) from the database and display out these two information. Is there any guide on how to grab the information and display it out after the user have log in? Thank you very much.
1. Try using SQLite DataBase, which ships with Android.
2. Its simply a file with NO DATABASE SERVER.
3. This DB can be as small in size as 250KB.
For a quick and easy example see here:
http://android-er.blogspot.in/2011/06/simple-example-using-androids-sqlite_02.html
For understanding the queries look here:
http://mobile.tutsplus.com/tutorials/android/android-sqlite/
http://www.vogella.com/articles/AndroidSQLite/article.html
I want to create an android that allows the user to enter data, like name and id number. I want to save that data as an object, to a file. I know I can do that using ObjectOutputStream, which I did, and it works. However, I also want the user to come back later, be able to add more entries to the same file, and search through his/her previous entries. I know that only RandomAccessFile has that capability, but I still want to write objects since it's easier to deal with.
Does anyone have any tips on what's the best way to approach this?
I am aware of this post, but I am not sure if I can use the libraries mentioned there on android. I was also looking at SQLite, but I have no experience with it and I am not sure if it's the right option for me.
Thanks in advance!