|Language:||English, Spanish, Arabic|
|Genre:||Fiction & Literature|
|Distribution:||Free* [*Registration needed]|
Android tutorial for beginners - Learn Android Programming and how to develop android mobile phone and ipad applications starting from PDF Version. Android Tutorial in PDF - Learn Android Programming and how to develop android mobile phone and ipad applications starting from Environment setup. This tutorial describes how to create Android applications with Eclipse. It is based on Eclipse (Juno), Java and Android (Jelly Bean).
Loops If there is one thing a computer is good at, it is doing repetitive tasks.
To perform a repetitive task in a programming language you use a construct called a loop — something that loops around again and again. Java has three types of simple loop: the for loop, the while loop, and the do while loop. Each loop type follows the same basic idea, you need to repeat something over and over again until a certain condition is met. The for loop as three parts. In the example above the initialization is used to declare an integer i and set its value to 1.
This expression will be tested every time the loop executes. If the result of the test is true then the loop will go around again. In this example the test is to check that i is still less than or equal to After each iteration the third section, the iterator, will be executed.
In this example it increases the value of i by one. The iterator also needs to be coded separately.
A do… while loop is very similar to a while loop with one big difference, the test to see if the loop should continue is at the end of the loop and not at the start. When x goes over 30 the loop will stop. Objects As I mentioned before in this Java tutorial for beginners, Java is what is known as an object-orientated OO programming language and to really learn Java programming and Android programming it is important to understand OO concepts. At its simplest level an object is a set of methods functions that work on a data set.
The data and the methods belong to the object, and work for the object. GetCount ; myCounter. Increment ; System.
Leaving the first method for the moment, you can see that Increment and GetCount are very simple. The first adds one to the internal variable count and the second returns the value of count.
You can actually create methods that will return all kinds of data, including objects. Notice that the first method has the same name as the class itself, i.
It is used to initialize the object with default values and perform any other necessary initialization tasks. In this example it just sets count to zero. For example, you can create a class called Animal and then derive a new class from it for a specific animal, say an Elk. Here is an example, I will expand on what is happening here in a moment… You are going to need to create two files for this example, Animal. In this we are displaying a list of items by using RecyclerView.
After getting the success response from server we are calling our adapter to set the data in RecyclerView.
In this step we create a new xml file for item row in which we creates two TextView to show the data. In this step we create an Interface in which we have getUserList method to get the data from web api.
In this step Firstly we get the reference of RecyclerView in our Activity. After that we implement the API in our onCreate method.
Finally After getting the success response from server we are calling our adapter to set the data in RecyclerView.
In this step we show a Progress dialog while implementing API and after getting response or error we dismiss it. LinearLayoutManager; import android. RecyclerView; import android.
In this step we create a UsersAdapter class and extends RecyclerView. Adapter class with View Holder in it. After that we implement the overrided methods and create a constructor for getting the data from Activity. Finally we implement the setOnClickListener event on itemview and on click of item we display the name of the user with the help of Toast. Context; import android. LayoutInflater; import android. ViewGroup; import android. TextView; import android. List; public class UsersAdapter extends RecyclerView.
Gradle Dependencies — In retrofit 1. RestAdapter and Retrofit — In retrofit 1. The builder pattern using these two is still same. Retrofit 1.
Builder ; 3.
Dynamic Urls — One of the best feature in retrofit 2. Lets take a use-case, we need to download file from internet source and files will have different urls.
The files are either stored on Amazon;s S3 server or somewhere else on the web. Video Recording Media. AppCompatActivity; import android. Verbal A. Compiler D. Web Tech. Cyber Sec. Control S. Javatpoint Services JavaTpoint offers too many high quality services. For creating the simple example: