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Articles by Azhar
Page 31 of 46
How to create a notification alert using Kotlin?
This example demonstrates how to create a notification alert 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.ktpackage app.com.kotlinapp import android.app.* import android.content.Context import android.content.Intent import android.graphics.BitmapFactory import android.graphics.Color import android.os.Build import android.os.Bundle import android.view.View import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { lateinit var notificationChannel: NotificationChannel lateinit var notificationManager: NotificationManager lateinit var builder: Notification.Builder private val channelId = "12345" ...
Read MoreHow to create a multilevel listView using Kotlin?
This example demonstrates how to create a multilevel listView using Kotlin Android.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.ktpackage app.com.kotlinapp import android.os.Bundle import androidx.appcompat.app.AppCompatActivity import kotlinx.android.synthetic.main.activity_main.* class MainActivity : AppCompatActivity() { private val header: MutableList = ArrayList() private val body: MutableList = ArrayList() override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val myFavCricketPlayers: ...
Read MoreHow to listen for volume buttons in Android background service using kotlin?
This example demonstrates how to listen for volume buttons in Android background service 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.ktpackage app.com.kotlinapp import android.os.Bundle import android.os.Handler import android.provider.Settings import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { private lateinit var settingsContentObserver: SettingsContentObserver override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) settingsContentObserver ...
Read MoreHow to play sound using SoundPool in Kotlin?
This example demonstrates how to play sound using SoundPool 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. Step 3 − Create a new Android Resource folder (raw) and copy-paste your sound file in the res/raw/filename.mp3 as shown below −Step 4 − Add the following code to src/MainActivity.ktpackage app.com.myapplication import android.media.AudioManager import android.media.SoundPool import android.os.Bundle import android.view.View import android.widget.Toast import androidx.appcompat.app.AppCompatActivity @Suppress("DEPRECATION") class MainActivity : AppCompatActivity() { private var ...
Read MoreHow to add a shadow and a border on circular imageView android?
This example demonstrates how to add a shadow and a border on circular imageView androidStep 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.javapackage com.app.sample; import androidx.appcompat.app.AppCompatActivity; import androidx.core.graphics.drawable.RoundedBitmapDrawable; import androidx.core.graphics.drawable.RoundedBitmapDrawableFactory; import android.content.Context; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.RelativeLayout; import android.os.Bundle; public class MainActivity extends AppCompatActivity ...
Read MoreHow to bind data from a database to an Android CheckBox in a ListView?
This example demonstrates how to bind data from a database to an Android CheckBox in a ListView.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 res/layout/row_item.xml. Step 4 − Add the following code to src/MainActivity.javapackage com.app.sample; import androidx.appcompat.app.AppCompatActivity; import android.view.View; import android.widget.AdapterView; import android.widget.ListView; import java.util.ArrayList; import android.os.Bundle; public class MainActivity extends AppCompatActivity { ArrayList dataModels; ListView ...
Read MoreHow to Justify Text in TextView in Android?
This example demonstrates how to Justify Text in TextView on Android.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 res/layout/list_item.xml Step 4 − Add the following code to src/MainActivity.javapackage com.app.sample; import androidx.appcompat.app.AppCompatActivity; import androidx.recyclerview.widget.LinearLayoutManager; import androidx.recyclerview.widget.RecyclerView; import android.os.Bundle; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private final String TAG = "MainActivity"; private ...
Read MoreHow to scale an Image in ImageView to keep the aspect ratio in Android?
This example demonstrates how to scale an Image in ImageView to keep the aspect ratio in Android.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.javapackage com.app.sample; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.widget.ImageView; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ImageView my_image = (ImageView) findViewById(R.id.my_image); ...
Read MoreHow to support different screen size in Android?
This example demonstrates how to support different screen sizes in Android.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.javapackage com.app.sample; import androidx.appcompat.app.AppCompatActivity; import android.util.DisplayMetrics; import android.widget.TextView; import android.os.Bundle; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); DisplayMetrics metrics = new DisplayMetrics(); ...
Read MoreHow to write a SoftKeyboard open and close listener in an activity in Android?
This example demonstrates how to write a SoftKeyboard open and a close listener in activity in Android.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.javapackage com.app.sample; import androidx.annotation.RequiresApi; import androidx.appcompat.app.AppCompatActivity; import androidx.constraintlayout.widget.ConstraintLayout; import android.os.Bundle; import android.graphics.Rect; import android.os.Build; import android.view.View; import android.view.ViewTreeObserver; import android.view.inputmethod.InputMethodManager; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends AppCompatActivity implements View.OnClickListener{ ConstraintLayout ...
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