Numerous developers will reveal to you that the absolute greatest slip-ups they’ve made have experienced experimentation. It’s actual—improvement is an expertise that requires some serious energy and practice. As Android designers improve their aptitudes after some time, they’ll commit less and less errors, prompting cleaner code, programming that performs better, and less bugs. It’s all piece of the expectation to learn and adapt.
Notwithstanding, even an accomplished designer can profit by evaluating probably the prescribed procedures that Google spreads out for Android ventures. To assist you with beginning your Android application venture off on the correct foot, here are a couple of tips and best practices to consider.
LEARN XML AND JAVA
Extensible markup language (XML) is a markup language that is the establishment for the Android (UI) and components. Java is the back-end coding language of the Android stage, and it’s utilized with restricting usefulness with your XML formats.
Let’s take a look at a small example.
<?xml version="1.0" encoding="utf-8"?><layout xmlns:android=http://schemas.android.com/apk/res/android"><data><variable name="customer" type="com.example.Customer"/></data> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"><TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@{customer.firstName}"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@{customer.lastName}"/> </LinearLayout></layout>
This small layout has one data object defined as “Customer.” For developers used to binding elements in even web design, this should be intuitive for you. The data element is defined in Java, and then the object data is bound to the front-end layout element. In this example, we have a first and last name. The following Java code is an example of a Customer class used for the binding.
public class Customer { public final String firstName; public final String lastName; public Customer (String firstName, String lastName){ this.firstName = firstName; this.lastName = lastName; }}
Notice that the constructor takes a first and last name variable and binds the data to the public class properties. When the screen opens on the device, this data is then bound to the front-end elements.
Before you get started in Android development, you should be proficient in both of these technologies. Understanding the fundamentals of XML formats is relatively easy, but Java is an object-oriented language and object-oriented programming (OOP) can be challenging if you’re not familiar with the concept. A newer language and framework, Kotlin, has been introduced to help advance Android app development. It can also be used with legacy Java apps as Kotlin co-operates with Java code.
The best way to learn Java is to dive into someone else’s code. GitHub is filled with open-source projects that help you understand Java and OOP concepts. The better your OOP skills are, the easier it will be to create a better coded, less buggy Android app.
UNDERSTAND MEMORY LIMITATIONS
Mobile devices don’t have the high memory limitations that desktops have. In mobile programming, you must learn to code with smaller memory limitations in mind. If you carelessly use memory on an Android device, you run the risk of your app crashing due to “out of memory” errors.
To work around this, use services on the device sparingly and release memory resources when your app is hidden. You can release memory resources by overriding the on Trim Memory event although you should know that this isn’t a magic solution that allows you to ignore other performance optimization throughout your code. The following is a small sample of pseudo code that shows you how to override the event.
@Over ride public void on Trim Memory(int level) { if (level >= TRIM_MEMORY_MODERATE) { //release resources here }}
Google also recommends that you avoid or at least reduce the use of bitmaps to lower the memory use when your app is running on the device. You can also use third-party tools such as Picasso or Fresco.
USE THE DEFAULT KEYBOARD BASED ON REQUIRED INPUT
When the user clicks an input text box in an app, the keyboard that pops up should automatically display the characters required to send the right kind of input. For example, if the user is entering a phone number, a numerical keyboard should be the default keyboard. If the app is requesting an email, a keyboard with characters, @ symbols, and a .com key should display.
The EditText box can be utilized for characters, numbers, or alphanumeric information. The kind of information you set for your EditText drives the console that shows on the gadget. Take the accompanying EditText box for instance.
<EditTextandroid:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/editText" android:layout_alignParentRight="true" android:layout_alignParentEnd="true" android:hint="Zipcode" android:numeric="integer" />
Notice that the last property demonstrates that the information ought to be numeric. At the point when the client clicks this structure component, a numeric console shows. Utilizing this standard makes it simpler for your clients to round out structures by furnishing them with the kind of info they ought to utilize.
Continuously
CONSIDER USER SECURITY
It’s evaluated that more individuals utilize cell phones to get to the web than work areas. This makes portable applications a greater objective for programmers. At the point when you make your portable applications, consistently remember client security. Security ought to be a need and frequently needs exploration to build up an application that follows best practices to keep away from regular imperfections
For example, when you make and store documents on the gadget, don’t permit every other application to peruse and keep in touch with them. In particular, don’t make documents with the MODE_WORLD_READABLE or MODE_WORLD_WRITABLE consent alternatives.
Additionally, never use communicate purposes to pass touchy information. This permits a malicious application to sniff the information. Rather, utilize express expectations to keep information secure.
At long last, use WebView with alert. This is most likely one of the greatest potential security imperfections in a versatile application. Debilitate JavaScript and module support in the event that you needn’t bother with it with your application, and handicap neighborhood document access to secure your application’s delicate information.
Try not to
USE THE EMULATOR FOR REAL-WORLD TESTING
The Emulator in Android Studio is extraordinary for advancement and in any event, troubleshooting, however it doesn’t completely mimic a working Android gadget. You can accept fundamental condition highlights with the Emulator, however with regards to testing, you ought to consistently utilize genuine gadgets.
Obviously, this is a tremendous speculation for an Android designer, yet it will make the whole turn of events and testing life cycle significantly more effective. It likewise guarantees that you’re ready to test your applications in different circumstances as the client changes settings on the genuine gadget. You can, in any case, utilize robotized cloud arrangements, for example, Amazon’s Testing stage.
Testing ought to never be messed with. It ought to be a significant venture when you plan and send applications for your customers. Less bugs implies more joyful clients, and it can likewise mean a more effective application in Google Play. This doesn’t imply that you have to purchase each gadget available to test your application on, however you should represent a portion of the more famous ones and the most well-known screen sizes.
End
Versatile improvement is as yet another outskirts for designers, and a lot of customers are searching for an Android engineer to transform their thought into a substantial item. Regardless of whether you’re simply beginning or are a prepared star, you ought to consider these and other accepted procedures. Or more all else, consider your clients’ eventual benefits when planning your code and interface. This will prompt a more proficient item and more joyful customers as you keep on creating applications later on.
SOURCE:-https://www.upwork.com/hiring/mobile/tips-and-best-practices-for-android-development/