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The official site for Android developers. Provides the Android SDK and documentation for app developers and designers.

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Guide to Install and Set up Android Studio

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Guide to Install and Set up Android Studio

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Guide to Install and Set up Android Studio

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Guide to Start a New Project in Android Studio

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Guide to Start a New Project in Android Studio

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Guide to Start a New Project in Android Studio

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Screenshot

What it is

DB Browser for SQLite (DB4S) is a high quality, visual, open source tool to create, design, and edit database files compatible with SQLite.

DB4S is for users and developers who want to create, search, and edit databases. DB4S uses a familiar spreadsheet-like interface, and complicated SQL commands do not have to be learned.

Controls and wizards are available for users to:

Create and compact database files

Create, define, modify and delete tables

Create, define, and delete indexes

Browse, edit, add, and delete records

Search records

Import and export records as text

Import and export tables from/to CSV files

Import and export databases from/to SQL dump files

Issue SQL queries and inspect the results

Examine a log of all SQL commands issued by the application

Plot simple graphs based on table or query data

What it is not

This program is not a visual shell for the sqlite command line tool, and does not require familiarity with SQL commands. It is a tool to be used by both developers and end users, and must remain as simple to use as possible in order to achieve these goals.

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DB Browser for SQLite (DB4S) is a high quality, visual, open source tool to create, design, and edit database files compatible with SQLite. DB4S is for users and developers who want to create, search, and edit databases. DB4S uses a familiar spreadsheet-like interface, and complicated SQL commands do not have to be learned.

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GitHub is where over 100 million developers shape the future of software, together. Contribute to the open source community, manage your Git repositories, review code like a pro, track bugs and features, power your CI/CD and DevOps workflows, and secure code before you commit it.

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Git is easy to learn and has a tiny footprint with lightning fast performance. It outclasses SCM tools like Subversion, CVS, Perforce, and ClearCase with features like cheap local branching, convenient staging areas, and multiple workflows.

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Book - Beginning Android Programming with Android Studio

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Book - Beginning Android Programming with Android Studio

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Beginning Android Programming with Android Studio, 4th Edition

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With the growing need for mobile apps, the demand for mobile app developers has also increased to a great extent. But finding a certified mobile application developer is hard to come by. It is because a large number of companies are not able to find the developers who have years of experience and hold vast expertise in developing mobile apps.

Therefore, it's crucial for any developer to pack himself with the trending technologies and go for certification course for a mobile app developer.

The mobile app development is defined under two platforms; one is Android and the other is iOS. Having the best knowledge about any one of them with an understanding of Java and JavaScript can put your name in the good books of the company.

Mobile Application Developer Certification Programs To Consider in 2020

Some of the top certifications that mobile app developers should consider this year are as follows:

1. Android Developer Certification

There is a wide range of Android devices in comparison to iOS mobile devices. Apparently, getting an Android certification is the best thing if you are looking to make your way in the mobile app development world to find the best job.

Google's Android Developer certification can be attained through the developer certification site of Google. However, you should not sign up without essential knowledge to save yourself from wasting your precious time as well as money.

On the other hand, Google has joined hands with Udacity to give a Google Developer Certification course, which can be availed at $99, which was $149 earlier. It means that if you are thinking to get Android Developer Certification, then this is the perfect time for you.

2. Swift Developer Certification

Swift is known as the development language of iOS. This language is a combination of C and Objective C, and this makes it very much familiar to all those who are well-versed with the rest of the two languages. However, the saddest thing is that Apple doesn't offer a Swift certification, and as a result, you have to rely on third-party certifiers.

In this regard, Coursera provides a five-week online course in programming for iOS with swift, and at the end of the course, mobile app developers get a certificate from Coursera. However, this certificate is not as appealing as a certification straight from Apple, but this will also look good to some potential employers.

3. Certification in Java

Java is the best programming language that has gained strength with every single passing day, and Android apps make use of this language. Hence, learning Java can put you in the right place for picking up Android app development companies. Thus, there is no exaggeration in saying that considering a certification in Java development makes sense and the certification can be obtained from Oracle.

4. JavaScript Certification

It is a simple and easy-to-learn language for a mobile app developer, and you can get certification by taking Microsoft Programming in HTML5 with JavaScript and CSS3 course. It is believed that if you are not looking forward to taking a certification course, then you should undoubtedly learn the basics to reap its benefits.

If your objective is to transform yourself from a good to a great developer, then all the certifications mentioned above should be considered this year.

Follow

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Best Mobile App Developer Certificate Programs

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With the growing need for mobile apps, the demand for mobile app developers has also increased to a great extent. But finding a certified mobile application developer is hard to come by. It is because a large number of companies are not able to find the developers who have years of experience and hold vast expertise in developing mobile apps.

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Android tutorial or Android Studio tutorial covers basic and advanced concepts of android technology. Our Android development tutorial is developed for beginners and professionals.

Android is a complete set of software for mobile devices such as tablet computers, notebooks, smartphones, electronic book readers, set-top boxes etc.

It contains a linux-based Operating System, middleware and key mobile applications.

It can be thought of as a mobile operating system. But it is not limited to mobile only. It is currently used in various devices such as mobiles, tablets, televisions etc.

Android Studio Index

Prerequisite

To learn Android Studio, you must have the basic knowledge of Java programming language.

Audience

Our Android tutorial is designed to help beginners and professionals.

Problem

We assure that you will not find any problem in this Android Studio tutorial. However, if there is any mistake, please post the problem in the contact form.

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Learn Android Tutorial | Android Studio Tutorial - Javatpoint

# data[].attributes.attachment_link.description
Android tutorial or Android Studio tutorial covers basic and advanced concepts of android technology. Our Android development tutorial is developed for beginners and professionals. Android is a complete set of software for mobile devices such as tablet computers, notebooks, smartphones, electronic book readers, set-top boxes etc.

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I have been in the teaching profession now for 16 years teaching Mathematics, Java application development and Android application development.

I love to teach people new skills and will go the extra mile for people willing to work hard to pass my courses.

I studied Information Technology and obtained my BSc degree in Information Technology in 2001 and my BSc Honors degree in Information Technology in 2002. I started my teaching career in 2003 and in 2007 obtained my Post Graduate Certificate in Education. In January 2016 I obtained my Masters Degree in Education.

I am currently keeping myself busy creating Android applications and improving current systems at companies while also teaching Android application development and Java application development.

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Free Android Development Tutorial - Free Android Apps Tutorial: Android Application Development

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I have been in the teaching profession now for 16 years teaching Mathematics, Java application development and Android application development. I love to teach people new skills and will go the extra mile for people willing to work hard to pass my courses.

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Online Course-Become an Android Developer from ScratchSimply the bes

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Online Course-Become an Android Developer from ScratchSimply the bes

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Do you want to build applications for the most popular operating system in the world?

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"Become An Android Developer From Scratch" is designed to be the best first step to launching your career as an Android Developer. Whether you've never programmed before or are coming to mobile development for the first time, if you're truly inspired to learn Android Development, this is where you need to start.

This course has been in development for over two years, continuously perfected through research and testing in training bootcamps throughout the US. It represents a collaboration between a professional educator with over 20 years of experience in helping people learn and a professional mobile developer who has helped companies like Sony, Verizon, and nVidia build stunning mobile applications.

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"Become An Android Developer From Scratch" will give you a new, richer perspective on how mobile devices work. After you've completed this rigorous, challenging, and super fun course, you will be able to create your own apps, deploy to the Google Play store, and even interview for a job anywhere in the world.

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No course is going to make you into an expert. It's up to you to challenge yourself and find your path to making the apps you dream about. Become an Android Developer from Scratch is the best place to begin. Are you ready to get started?

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Free Android Development Tutorial - Become an Android Developer from Scratch

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Do you want to build applications for the most popular operating system in the world? Do you want the opportunity to put your apps on over 1 billion devices? "Become An Android Developer From Scratch" is designed to be the best first step to launching your career as an Android Developer.

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Learn Android App Development from Vanderbilt University. This Specialization enables learners to successfully apply core Java programming languages features & software patterns needed to develop maintainable mobile apps comprised of core Android ...

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SQLite (Insert, Delete, Update, Retrieve)

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SQLite (Insert, Delete, Update, Retrieve)

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Firebase Login and Authentication: Android Tutorial

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Firebase Login and Authentication: Android Tutorial

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Firebase Login and Authentication: Android Tutorial

Take out your Android Phones and try to count the number of applications that are not having any kind of login or authentication in it. So, you got it, right? There are very few applications that are not having any kind of login or authentication in it. In fact, when we start learning Android development, then most of us must have built the basic login and signup screen. So, are we going to build some login and signup screen here? No, but yes also ;) Don't worry, in this blog, we will be learning how to login and authenticate in our Android application but with the help of Firebase. Following is how the flow of this blog looks like:

Introduction to Firebase

Login and Authentication in Firebase

Example - Email login and registration

Pros and cons of using Firebase

Closing notes

So, let's get started.

Introduction to Firebase

Firebase was developed in 2011 to create and provide support for mobile and web applications. Later on, in 2014, it was acquired by Google. It gives you a number of facilities that can be used for the fast development of your applications. So, all you need to do is build applications fastly without thinking of managing infrastructure. Following are the products of Firebase that can be used in any applications:

Cloud Firestore: It is a NoSQL database that is used to easily store, sync, and query data for applications.

ML Kit: It gives the power of Machine Learning to your applications.

Authentication: It is used to authenticate the users of your applications.

Realtime Database: It is used to store and retrieve data in realtime.

Crashlytics: It provides you with the crash reports of your application.

Test Labs: It will test your applications on the devices hosted by Google.

Performance Monitoring: Monitors the performance of your application at each and every second.

In-App Messaging: It helps you to send in-app messages that helps your users to interact with you.

Google Analytics: It will generate a report of your application. For example, a report of users increased in the last one month or active users, etc.

Remote Config: It helps you to change or add some feature in your app even without putting any update.

Apart from the above-mentioned products of Firebase, some of the other Firebase products are Cloud Functions, Hosting, Cloud Storage, App Distribution, Predictions, A/B Testing, Cloud Messaging and Dynamic Links.

In this blog, we will learn about the authentication part of the Firebase.

Login and Authentication in Firebase

Firebase authentication is used to authenticate the users of applications in a very easy manner. Not only for the users but for the developers also, it provides a very easy flow for the authentication and login process that is present in almost every application.

Firebase supports authentication using email and password, phone numbers or even you can use facebook, google, twitter, github, etc.

To authenticate your users, all you need to do is get the authentication credentials from the user and then pass this credential to the Firebase Authentication SDK. These credentials can be email-password or mobile number or any token from identity providers like facebook, google, twitter, github, etc. After passing the credentials, Firebase will verify the credentials and in return, you will get a response that tells you if the authentication is successful or not.

Note: By default, the authenticated users can read/write the data from the realtime database or cloud storage.

Now, let's see how we can use Firebase login or authentication in our application.

Example - Email login and registration

In this section of the blog, we will learn how to login and register using Email and Password with the help of Firebase. In this example, we will be having four activities i.e. one for Login, one for Registration, one for password reset and one will be our MainActivity. The following image will describe the flow of activities:

To use Firebase Authentication in our application, we need to connect our project i.e. the Android Studio project to Firebase. Following are the steps that are used to connect an Android project to Firebase:

Step 1: Open Android Studio and create a new project or open an existing project.

Step 2: In Android Studio, login with your email. You can find the login button at the top right corner of the Android Studio. (Remember the email id that you have used here)

Step 3: Open the Firebase Website and login into it. (use the same email id as used in Android Studio for login)

Step 4: After login, click on the " Go To Console" button that is present of the upper right side of the website.

Step 5: Click on " Add Project".

Step 6: Enter the required details of the project and click on submit.

Step 7: After creating a project, you will see the below image of your project dashboard.

Here, all the services of Firebase are shown and you can use any of them.

Step 8: In this blog, we are interested in the authentication part, so click on the " Authentication" button and then switch to " Sign-in method" tab.

Step 9: In our example, we will signin by email. So, click on the edit button next to the " Email/Password" option and you will see the below screen.

Step 10: Enable Email/Password signin and click on " Save". You are done with the Firebase website part.

Step 11: Come back to your project in Android Studio and click on Tools > Firebase > Authentication.

Step 12: We are almost done, now we have to add our project in Android Studio with the project that we have created in the Firebase. So, click on " Email and password authentication". Here, we are having two options i.e. " Connect to Firebase" and " Add Firebase Authentication to your app". Firstly, we have to connect our project to Firebase, so, click on " Connect to Firebase" button.

Step 13: A list of projects, associated with your email will be displayed and you have to select the project that you have created earlier on Firebase and then click on " Connect to Firebase".

Step 14: Now, your project on the Android Studio is connected with the one present on the Firebase. Lastly, we have to add some dependencies to our projects. So, click on " Add Firebase Authentication to your app"(this is the second option that we found on step number 12). A dialog box will be opened. Click on " Accept Changes" and it will automatically add all the dependencies to your project.

Phew! Finally, we are done with all the steps that are required to connect our Android Studio project with Firebase for Authentication. Now, let's move on to the coding part.

As discussed earlier, in our example, we will be having four activities:

1. MainActivity: This is the main activity of the application. The user will be redirected to this activity if the user is successfully logged in or have created a new account. In the MainActivity, we are having options for changing password and Logout.

2. LoginAcitivty: This activity is used to login the user into the application and after successful login, transfer the user to MainActivity. It contains two EditText for taking email and password from the user. Two buttons for Login and Signup(signup button will transfer the user to the SignupActivity) and one TextView that will transfer the user to the ForgotPasswordActivity.

3. SignupActivity: This activity is used to register the user into the application and after successful registration, transfer the user to the MainActivtiy. It contains two EditText for taking email and password from the user for registration. Two buttons for Signup and Login(login button will transfer the user to the LoginActivity).

4. ForgotPasswordActivity: This activity is used to send the forgot password link to the user to set a new password. The reset link will be sent to the user's email id.

Register a user with email and password

To register a user with email and password, firstly, you have to declare an instance of FirebaseAuth.

private lateinit var auth: FirebaseAuth

Now, in the onCreate() method, initialize the FirebaseAuth instance.

auth = FirebaseAuth.getInstance()

To signup a user with email and password, we can take the help of createUserWithEmailAndPassword() method. This method takes email and password as a parameter, validates them and then create a new user.

auth.createUserWithEmailAndPassword(email, password).addOnCompleteListener(this, OnCompleteListener{ task -> if(task.isSuccessful){ Toast.makeText(this, "Successfully Registered", Toast.LENGTH_LONG).show() val intent = Intent(this, MainActivity::class.java) startActivity(intent) finish() }else { Toast.makeText(this, "Registration Failed", Toast.LENGTH_LONG).show() } })

That's it. Your user will be registered and you can see the registered user on the Firebase website under the Authentication section and then in the Users tab. If you are trying to register with the same email more than once, then you will receive an error or in simple words your task is unsuccessful.

Login a user with email and password

In the previous section, we saw how to register a user with email and password. Now, we need to login the user by authenticating the email and password entered by the user.

Firstly, declare an instance of FirebaseAuth.

private lateinit var auth: FirebaseAuth

Now, in the onCreate() method, initialize the FirebaseAuth instance.

auth = FirebaseAuth.getInstance()

To signin a user with email and password, we have one method called signInWithEmailAndPassword(). This method takes email and password as a parameter, validates them and then signin a user in your application if the validation is successful. Following is the code for the same:

auth.signInWithEmailAndPassword(email, password).addOnCompleteListener(this, OnCompleteListener { task -> if(task.isSuccessful) { Toast.makeText(this, "Successfully Logged In", Toast.LENGTH_LONG).show() val intent = Intent(this, MainActivity::class.java) startActivity(intent) finish() }else { Toast.makeText(this, "Login Failed", Toast.LENGTH_LONG).show() } })

Send the change password link to email

Sometimes, the user forgot his/her password and in that case, your application should provide some way of password reset. Things become easier when you use Firebase. In Firebase, with the help of sendPasswordResetEmail() method, you can send the password reset link to the user and by clicking on that link, the user can set the newer password.

Firstly, create an instance of FirebaseAuth.

private lateinit var auth: FirebaseAuth

Now, in the onCreate() method, initialize the FirebaseAuth instance.

auth = FirebaseAuth.getInstance()

After that, you can use the sendPasswordResetEmail() to send the reset email to the user. This method takes email as a parameter.

auth.sendPasswordResetEmail(email) .addOnCompleteListener(this, OnCompleteListener { task -> if (task.isSuccessful) { Toast.makeText(this, "Reset link sent to your email", Toast.LENGTH_LONG) .show() } else { Toast.makeText(this, "Unable to send reset mail", Toast.LENGTH_LONG) .show() } })

Check your email, you have received a reset link :)

Check if a user is logged in or not

To check if a user is logged in or not, we can use the getCurrentUser() method to get the status of a user.

if(auth.currentUser == null){ val intent = Intent(this, LoginActivity::class.java) startActivity(intent) finish() }else{ Toast.makeText(this, "Already logged in", Toast.LENGTH_LONG).show() }

In the above code, if the user is logged in, then a toast will be displayed and if a user is not logged in then the LoginActivtiy will be launched.

Update Password

You can update the password of a user by using the updatePassword() method. This method will take the new password as a parameter and will update the password for you.

So, create a FirebaseAuth instance and initialize the instance and after that use the updatePassword() method as below:

auth.currentUser?.updatePassword(password) ?.addOnCompleteListener(this, OnCompleteListener { task -> if (task.isSuccessful) { Toast.makeText(this, "Password changes successfully", Toast.LENGTH_LONG) .show() finish() } else { Toast.makeText(this, "password not changed", Toast.LENGTH_LONG) .show() } })

Similarly, you can change the email by using the updateEmail() method in the same way as used in the case of updatePassword().

Logout the user

Now, we are done with the login, signup and reset the password. Our next aim is to logout the user if it is already logged in. To do so, we are having one method named signOut(). So, just use this method to signout a user.

FirebaseAuth.getInstance().signOut()

Pros and cons of using Firebase

Some of the advantages of using Firebase are:

Easy to integrate into our project.

So many functions are available for performing complex operations.

Realtime update.

No configuration required on the server-side.

Some of the disadvantages of using Firebase are:

The storage format is NoSQL. It uses JSON format.

While performing authentication, you need to make sure that the user logged in the app should not have access to the database.

Closing notes

In this blog, we learned how to use Firebase for login and authentication in our application. Firebase provides a number of methods for doing the authentication task in a very easier manner. So, to perform a login or authentication task, you need to use those methods only. We saw how we can use email and password to login into an application. Other ways of login and authentication include a phone number, facebook, google, github, twitter, etc.

Note: The project used in this blog is just for example purpose. In general to have a better user experience and app performance, you should use the modularization concept. Read here.

Hope you learned something new today.

Have a look at our Android tutorials here .

Do share this blog with your fellow developers to spread the knowledge. You can read more blogs on Android on our blogging website.
Apply Now: MindOrks Android Online Course and Learn Advanced Android
Happy Learning :)
Team MindOrks!

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Firebase Login and Authentication: Android Tutorial

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Take out your Android Phones and try to count the number of applications that are not having any kind of login or authentication in it. So, you got it, right? There are very few applications that are not having any kind of login or authentication in it.

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This SQLite tutorial teaches you everything you need to know to start using SQLite effectively. You will learn SQLite through extensive hands-on practices.

If you have been working with other relational database management systems such as MySQL, PostgreSQL, Oracle, Microsoft SQL Server and you hear about SQLite. And you are curious to know more about it.

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If you are just starting out learning SQL and want to use SQLite as the database for your application.

If you are one of the people described above, this SQLite tutorial is for you.

SQLite is an open-source, zero-configuration, self-contained, stand-alone, transaction relational database engine designed to be embedded into an application.

Getting started with SQLite

You should go through this section if this is the first time you have worked with SQLite. Follow these 3-easy steps to get started with SQLite fast.

Basic SQLite tutorial

This section presents basic SQL statements that you can use with SQLite. You will first start querying data from the sample database. If you are already familiar with SQL, you will notice the differences between SQL standard and SQL dialect in SQLite.

Section 1. Simple query

Select - query data from a single table using SELECT statement.

Section 2. Sorting rows

Order By - sort the result set in ascending or descending order.

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In - check if a value matches any value in a list of value or subquery.

Like - query data based on pattern matching using wildcard characters: percent sign (%) and underscore (_).

Glob - determine whether a string matches a specific UNIX-pattern.

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Left Join - combine data from multiple tables using the left join clause.

Cross Join - show you how to use the cross join clause to produce a cartesian product of result sets of the tables involved in the join.

Self Join - join a table to itself to create a result set that joins rows with other rows within the same table.

Full Outer Join - show you how to emulate the full outer join in the SQLite using left join and union clauses.

Section 5. Grouping data

Group By - combine a set of rows into groups based on specified criteria. The GROUP BY clause helps you summarize data for reporting purposes.

Having - specify the conditions to filter the groups summarized by the GROUP BY clause.

Section 6. Set operators

Union - combine result sets of multiple queries into a single result set. We also discuss the differences between UNION and UNION ALL clauses.

Except - compare the result sets of two queries and returns distinct rows from the left query that are not output by the right query.

Intersect - compare the result sets of two queries and returns distinct rows that are output by both queries.

Section 7. Subquery

Subquery - introduce you to the SQLite subquery and correlated subquery.

Exists operator - test for the existence of rows returned by a subquery.

Section 8. More querying techniques

Case - add conditional logic to the query.

Section 9. Changing data

This section guides you on how to update data in the table using insert, update, and delete statements.

Insert - insert rows into a table

Update - update existing rows in a table.

Delete - delete rows from a table.

Replace - insert a new row or replace the existing row in a table.

Section 10. Transactions

Section 11. Data definition

In this section, you'll learn how to create database objects such as tables, views, indexes using SQL data definition language.

SQLite Data Types - introduce you to the SQLite dynamic types system and its important concepts: storage classes, manifest typing, and type affinity.

Create Table - show you how to create a new table in the database.

Alter Table - show you how to use modify the structure of an existing table.

Rename column - learn step by step how to rename a column of a table.

Drop Table - guide you on how to remove a table from the database.

VACUUM - show you how to optimize database files.

Section 12. Constraints

Primary Key - show you how to define the primary key for a table.

NOT NULL constraint - ensure values in a column are not NULL.

UNIQUE constraint - ensure values in a column or a group of columns are unique.

CHECK constraint - ensure the values in a column meet a specified condition defined by an expression.

AUTOINCREMENT - explain how the AUTOINCREMENT column attribute works and why you should avoid using it.

Section 13. Views

Create View - introduce you to the view concept and show you how to create a new view in the database.

Drop View - show you how to drop a view from its database schema.

Section 14. Indexes

Index - teach you about the index and how to utilize indexes to speed up your queries.

Index for Expressions - show you how to use the expression-based index.

Section 15. Triggers

Trigger - manage triggers in the SQLite database.

Create INSTEAD OF triggers - learn about INSTEAD OF triggers and how to create an INSTEAD OF trigger to update data via a view.

Section 16. Full-text search

Section 17. SQLite tools

SQLite Resources

If you want to know more information about SQLite, you can go through a well-organized SQLite resources page that contains links to useful SQLite sites.

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SQLite Tutorial - An Easy Way to Master SQLite Fast

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This SQLite tutorial teaches you everything you need to know to start using SQLite effectively. You will learn SQLite through extensive hands-on practices. If you have been working with other relational database management systems such as MySQL, PostgreSQL, Oracle, Microsoft SQL Server and you hear about SQLite.

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Backed by Google and loved by app development
teams - from startups to global enterprises

We just wrapped up Firebase Summit 2021! Catch up on everything we announced and learn how Firebase can help you accelerate app development, run your app with confidence, and scale with ease.

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Backed by Google and loved by app development teams - from startups to global enterprises We just wrapped up Firebase Summit 2021! Catch up on everything we announced and learn how Firebase can help you accelerate app development, run your app with confidence, and scale with ease.