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Mobile Development Articles
Page 30 of 156
How to listen for a WebView finishing loading a URL in Android using Kotlin?
This example demonstrates how to listen for a WebView finishing loading a URL in Android using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.webkit.WebChromeClient import android.webkit.WebView import android.webkit.WebViewClient import android.widget.Button import android.widget.TextView import android.widget.Toast import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { lateinit var webView: WebView lateinit var textView: TextView private lateinit var ...
Read MoreHow to convert pixels to dp in an Android App using Kotlin?
This example demonstrates how to convert pixels to dp in an Android App using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.ktimport android.content.Context import android.os.Bundle import android.widget.Button import android.widget.TextView import androidx.appcompat.app.AppCompatActivity import kotlin.math.roundToInt class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) title = "KotlinApp" ...
Read MoreHow to create a Custom Ratingbar in Android using Kotlin?
This example demonstrates how to create a Custom Ratingbar in Android using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.widget.Button import android.widget.RatingBar import android.widget.RatingBar.OnRatingBarChangeListener import android.widget.TextView import android.widget.Toast import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { lateinit var ratingBar: RatingBar lateinit var button: Button lateinit var textView: TextView override fun onCreate(savedInstanceState: Bundle?) { ...
Read MoreHow do I restart an Android Activity using Kotlin?
This example demonstrates how to restart an Android Activity using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.widget.Button import android.widget.TextView import androidx.appcompat.app.AppCompatActivity import java.util.* class MainActivity : AppCompatActivity() { lateinit var textView: TextView lateinit var button: Button var random: Random = Random() override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) ...
Read MoreAndroid imageView Zoom-in and Zoom-Out using Kotlin?
This example demonstrates how to implement Android imageView zoom-in and Zoom out using kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.view.MotionEvent import android.view.ScaleGestureDetector import android.view.ScaleGestureDetector.SimpleOnScaleGestureListener import android.widget.ImageView import androidx.appcompat.app.AppCompatActivity import kotlin.math.max import kotlin.math.min class MainActivity : AppCompatActivity() { private lateinit var scaleGestureDetector: ScaleGestureDetector private var scaleFactor = 1.0f private lateinit var imageView: ImageView override fun ...
Read MoreAndroid app Vulnerability Scanner
AndroBugs Framework is an Android vulnerability analysis system that helps developers or hackers find potential security vulnerabilities in Android applications. We share our personal data through mobile apps if they are not secure its mean we not secured, let start Find vulnerability of android Mobile App - App security. Through this we can...find vulnerability in Appcheck the codeDangerous shell commandcollect information of appRequirementsBasic knowledge of LinuxApp which you testKali Linux MachineNow clone the Androbug – Framework. This framework is android vulnerability scanner tool; This tool is help-full for hacker and android penetration tester.git clone https://github.com/AndroBugs/AndroBugs_Frameworkgitcd AndroBugs_Frameworkpython androbugs.py -f /root/Desktop/Secure.apk -o ...
Read MoreAndroid Debug Bridge Mode
Android Debug Bridge (adb) is a versatile command-line tool that lets you communicate with a device. The ADB is typical, used to communicate with a smartphone, tablet, smartwatch, set-top box, or any other device that can run the Android operating system. We can do things on an Android device that may not be suitable for everyday use, like, install apps outside of the Play Store, debug apps, access hidden features, and bring up a UNIX shell, etc. For security reasons, Developer Options need to be unlocked and you need to have USB Debugging Mode enabled as well. Not only that, ...
Read MoreRadio Frequency IDentification (RFID)
Radio Frequency Identification (RFID) is the application of radio waves to read and capture information stored on tags affixed to objects. RFID readers are installed at tracking points and can read information from tags when they come into range, which can be of several feet radius. A tag need not be within direct line-of-sight of the reader to be tracked. RFID is used to check identities and track inventory, assets and people. RFID tags can be attached to a variety of objects like cash, clothing, baggage, parcels, and even implanted in animals and people.Working PrincipleThere are two parts in a ...
Read MoreThe Bluetooth Frame Structure
The Bluetooth network technology connects mobile devices wirelessly using short-wavelength, ultra-high frequency (UHF) radio waves over a short range to form a personal area network (PAN). Data is transferred between the Bluetooth devices as data frames. Two basic frame formats are defined, for transmitting data at basic data rate and for transmitting data at enhanced data rate.Bluetooth Frame Format with Basic Data RateA Bluetooth frame with basic rate has three parts, access code, header and data as shown in the following diagram−The various fields are−Access Code− A 72-bit field containing synchronization bits to identify the master.Header− A 54-bit field containing ...
Read MoreAsynchronous Connection-Less (ACL) Link
Bluetooth link layers define two types of data links, Asynchronous Connection-Less (ACL) Link, being one of them. It is the type of link used for transmission of general data packets using Bluetooth connection. ACL is a point – to – multipoint link used for irregular traffic between a master device and one or more slave devices.Features of Bluetooth ACL linksACL is a packet oriented link, i.e. the link establishes a packet – switched network.ACL is used for transmission of data traffic which are delivered at irregular intervals, where maintaining data integrity is more important than the time latency.Both symmetric and ...
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