This example demonstrates about How do I center text horizontally and vertically in a TextView of 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 app.com.sample; import android.os.Bundle; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);    } }Step 4 − Add the following code ... Read More

This example demonstrates about How to send HTML email using Android App.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 app.com.sample; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.text.Html; import android.view.View; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);    }    public void sendHtmlEmail(View view) { ... Read More

This example demonstrates about How to create paginating text 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 app.com.sample; import android.graphics.Color; import android.graphics.Typeface; import android.os.Bundle; import android.text.Html; import android.text.Spannable; import android.text.SpannableString; import android.text.Spanned; import android.text.TextUtils; import android.text.style.ForegroundColorSpan; import android.text.style.RelativeSizeSpan; import android.text.style.StyleSpan; import android.view.View; import android.view.ViewTreeObserver; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; public ... Read More

This example demonstrates about How to check current running applications in 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 app.com.sample; import android.app.ActivityManager; import android.content.Context; import android.os.Bundle; import android.widget.TextView; import androidx.appcompat.app.AppCompatActivity; import java.util.List; import java.util.Objects; public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       TextView textView = ... Read More

This example demonstrates about How to implement a long click listener on a Android 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 src/MainActivity.javapackage app.com.sample; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.Toast; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity {    String[] mobileArray = {"Android", "IPhone", "WindowsMobile", "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X"};    @Override    protected void ... Read More

This example demonstrates about How to launch activity only once when Android app is opened for the first time.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 app.com.sample; import androidx.appcompat.app.AppCompatActivity; import android.content.Context; import android.content.SharedPreferences; import android.os.Bundle; public class MainActivity extends AppCompatActivity {    String prevStarted = "prevStarted";    @Override    protected void onResume() {       super.onResume();       SharedPreferences sharedpreferences ... Read More

This example demonstrates about How to store drawable resources ID in the form of R.drawable.* inside an array using an XML values fileStep 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/values/ arrays.xml.           @drawable/image1       @drawable/image2       @drawable/image3     Step 3 − Add the following code to res/layout/activity_main.xml.             Step 4 − Add the following code to src/MainActivity.javapackage app.com.sample; ... Read More

This example demonstrates how do I take a screenshot in Android programmatically.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 Java Class and add the following code in screenshot.javaimport android.graphics.Bitmap; import android.view.View; public class Screenshot{    public static Bitmap takescreenshot(View v) {       v.setDrawingCacheEnabled(true);       v.buildDrawingCache(true);       Bitmap b = Bitmap.createBitmap(v.getDrawingCache());       v.setDrawingCacheEnabled(false);       ... Read More

This example demonstrates how do I disable orientation change 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.javaimport android.content.pm.ActivityInfo; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);       setContentView(R.layout.activity_main);    } }Step 4 − Add the following code to androidManifest.xml   ... Read More

This example demonstrates how do I set Android Wallpaper image 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 projectStep 2 − Add the following code to res/layout/activity_main.xml.     Step 3 − Add the following code to src/MainActivity.javaimport android.app.WallpaperManager; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.Toast; import java.io.IOException; public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       Button button ... Read More