Apps/Applications Articles - Page 55 of 196

This example demonstrates how to develop an Speech recognizer in Android without Google API in 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.Example                 Step 3 − Add the following code to src/MainActivity.ktExampleimport android.Manifest import android.content.Intent import android.content.pm.PackageManager import android.os.Bundle import android.speech.RecognitionListener import android.speech.RecognizerIntent import android.speech.SpeechRecognizer import android.util.Log import android.view.View import android.widget.ProgressBar import android.widget.TextView import android.widget.Toast import android.widget.ToggleButton import androidx.appcompat.app.AppCompatActivity import androidx.core.app.ActivityCompat class MainActivity : AppCompatActivity(), ... Read More

This example demonstrates how to use ViewFlipper 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 androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.view.Gravity import android.view.View import android.widget.TextView import android.widget.ViewFlipper class MainActivity : AppCompatActivity() {    lateinit var viewFlipper: ViewFlipper    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main) ... Read More

This example demonstrates how to set a timer 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.Example             Step 3 − Add the following code to src/MainActivity.ktexampleimport android.os.Bundle import android.os.CountDownTimer import android.view.View import android.widget.TextView import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    var counter = 0    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp" ... Read More

This example demonstrates how to get the selected index of a RadioGroup in Android using Kotlin.Step 1 − Create a new project in Android Studio, go to File ? New Project and fill allrequired details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.Example                             Step 3 − Add the following code to src/MainActivity.ktExampleimport android.os.Bundle import android.widget.Button import android.widget.RadioButton import android.widget.RadioGroup import android.widget.TextView import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    private lateinit var textView: TextView    private lateinit var button: Button ... Read More

This example demonstrates how to create a Expandable listView 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.Example     Step 3 − Create a new kotlin class CustomExpandableListAdapter.kt and add the following code −Exampleimport android.content.Context import android.graphics.Typeface import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import android.widget.BaseExpandableListAdapter import android.widget.TextView import java.util.HashMap class CustomExpandableListAdapter internal constructor(    private val context: Context,    private val titleList: List,    private val dataList: HashMap    ) : BaseExpandableListAdapter() {   ... Read More

This example demonstrates how to detect shake events in 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.Example         Step 3 − Add the following code to src/MainActivity.ktExampleimport android.content.Context import android.hardware.Sensor import android.hardware.SensorEvent import android.hardware.SensorEventListener import android.hardware.SensorManager import android.os.Bundle import android.widget.Toast import androidx.appcompat.app.AppCompatActivity import java.util.* import kotlin.math.sqrt class MainActivity : AppCompatActivity() {    private var sensorManager: SensorManager? = null    private var acceleration = 0f    private var currentAcceleration = 0f ... Read More

This example demonstrates how to implement bar code scanning in 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.Example             Step 3 − Add the following the dependency to build.gradle (Module:app)implementation 'com.google.zxing:core:3.3.3' implementation 'com.journeyapps:zxing-android-embedded:3.2.0@aar'Step 4 − Add the following code to src/MainActivity.ktExampleimport android.content.Intent import android.os.Bundle import android.util.Log import android.widget.Button import android.widget.TextView import android.widget.Toast import androidx.appcompat.app.AppCompatActivity import com.google.zxing.integration.android.IntentIntegrator class MainActivity : AppCompatActivity() {    lateinit var btnBarcode: Button    lateinit var textView: ... Read More

This example demonstrates how to automatically start and stop an Async task in 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.Example         Step 3 − Add the following code to src/MainActivity.ktExampleimport android.os.AsyncTask import android.os.Bundle import android.view.View import android.widget.Toast import androidx.appcompat.app.AppCompatActivity import kotlinx.android.synthetic.main.activity_main.* import java.lang.ref.WeakReference class MainActivity : AppCompatActivity() {    var variable = 10    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)     ... Read More

This example demonstrates how to stop an asynctask thread in 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.Example             Step 3 − Add the following code to src/MainActivity.ktExampleimport android.graphics.Color import android.os.AsyncTask import android.os.Bundle import android.view.View import android.widget.Button import android.widget.TextView import androidx.appcompat.app.AppCompatActivity import java.util.* class MainActivity : AppCompatActivity() {    private lateinit var btnDo: Button    private lateinit var btnCancel: Button    private lateinit var textView: TextView    private ... Read More

ample demonstrates how to make an Android SlidingDrawer slide out from the left in 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.Example                 Step 3 − Add the following code to src/MainActivity.ktExampleimport androidx.appcompat.app.AppCompatActivity import android.os.Bundle class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"    } }Step 4 ... Read More