PERTEMUAN 3_INTRO TO ANDROID APP DEV.pdf

Introduction
It’s the rage of android apps now as every business gets success and reach the end
users with its true potential. This is not down to earth process to create an
outstanding app, rather every developer with basic knowledge of some coding
languages like JAVA, C, C++ can do this.
So if you wanted to create an app out of your ideas, then here is the quick and simple
guide which helps you to build your won android app guide in less time. Follow the
simple steps and for sure you can earn handsome amount with the creative app which
you have curetted.
www.acewebacademy.com 040-64586626/7660966660

Prerequisites of android app development
•If you want to create a basic android app, you should have basic knowledge on coding languages
like JAVA, C, C++.
•Concept/idea to showcase or implement your app
System specifications to check:
The following are the required software requirements which you need to install if you are not
having before you start creating the app. Doesn't have!
Download and install the both Java tool Kit and Android Studio
First we need to install Java Jdk, because android studio will select automatically jdk path.
Or If you want to install android studio first then you need to set “Home path'
Java Jdk1.7 or Jdk 1.8 Java Jdk1.7 or Jdk 1.8
http://www.oracle.com/technetw
ork/java/javase/downloads/jdk8-
downloads-2133151.html
http://developer.android.com/s
dk/index.html
Hardware Requirements: Ensure that you are having these hardwarespecifications
- RAM 4GB, Hard disk 500GB

Wireframe
Have a great idea to develop app? Then now draw wireframe for your basic app and
ensure that you are making use of this tool to represent the proposed functionality of the
app and the structure of the app.
There should be proper attention on the graphical elements and the functionality of the
app. When this is achieved properly, then developing the code will be easier and you will
also know how the end users are going to use it. It is also helpful to make desired changes
if you wish things are not as per the specifications.
For example I want to develop a
basic Login Demo app with login &
sign up buttons functionality. Here is
my wireframe

Impeccable Design
Design is the element which attracts the people. When they like the graphics and the
colors used for the theme of the app, then they would spend some more time and know
the details of the app or its services. So make sure that you are vigilant about the colors
and as well the images and the graphics which you put into it.

Steps How to Create android app (Login Demo)
Once you are done with the wireframe and then added the images and the designs of
the app, now it is time to start the coding as per the requirements.
Step 1:
Open the Android studio and you can follow
the bellow steps to create new app.
Go to file------->New ----> new project

Start development:
Step 2:
Define Your app name, package name.
Here you have to enter the app name, company domain and as well the package name
once you are decided with the name.
App Name: Login Demo
Package/Domain Name:
By default you can see
your PC name.
package com.infasta.logindemo; here com is
domain name, infasta(PC name) is user editable
name and login demo is an app name
Find code on: http://bit.ly/1PnTPNK

Start development:
Step 3:
Enter the form Factors of the app (phone&tab, wear, tv, glass).
Enter the details of the SDK, TV glass, Wear and then proceed further.
Form factor: It says type of your app, below are option you can find. Depends on the
requirement you need to choose.

Impeccable Design
Step 4:
Once you select the form factor, the code will be generated by default.
Select empty activity for Login App Demo

Start development:
Step 5:
After you selected the form empty form factor, java class(with default class name as
MainActivity) and related xml file(with default name as activity_main)
As per your requirement you change both Java class and xml file name.
Find code on:
http://bit.ly/1PnTPNK

Start development:
Step 6:
Once you finish step 5, your application starts building in back-end in this process
dependence jar files will be added to app and completes app building.
Build the Application
Here your project is created and now you can add the dependence jar files and build the
application

Start development:
Step 7:
Once your application is built project gets created and then Java Class, Xml files open
automatically. You can see same as below

Code for Login App Demo
Step 8:
Open xml file, go to Design part and drag required 2 buttons from left side
widgets window
Here you can define the button listener method inside button tag
android:onClick="loginPage"
<!—onClick=signupPage this method name
you can write inside the java class
end of onCreate() method -->

Code for Login App Demo
Step 9:
You can define the button actions above the screen in java file.
Every screen’s logical code is provided here.
MainActivity.java

How to create the new Activity or another screen
How to create the new Activity or another screen
Step 10:
To create new Activity, follow the below screen and here you can defend the java
class, xml file name also.

Start development:
Step 11:
This is the screen for (Login screen) xml files
activity_login.xml

Start development:
Step 12:
This screen is for (signup screen) java and xml files
java file for SignupAcitvity.java
Activity_signup.xml

Start development:
Step 13 :
How to pass the values from one screen to another screen OR
Here the above signup details are shown as followed.
Ctivity_home.xml

Conclusion:
This is the simple guide which helps even the developers to develop the app which gets
the attention of the market. If you have an idea for business, do not stop implementing it
just thinking of the budget. Because you can even create an app and this is as simple as
explained above. Just make a note of the factors and the functionality and then you can
achieve step by step in no time. Happy and successful journey of creating the app for
your simple business.
A guide by Ace Web Academy Professional
Mobile App development Trainer
For more guides visit:
www.acewebacademy.com/blog

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