This example demonstrates how do I use calendar widget using the calendarView class in 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.javaimport android.support.annotation.NonNull; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.CalendarView; import android.widget.TextView; public class MainActivity extends AppCompatActivity {    CalendarView calendar;    TextView dateView;    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);     ... Read More

This example demonstrates how do I count number of characters in editText while typing 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.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.widget.EditText; import android.widget.TextView; public class MainActivity extends AppCompatActivity {    TextView textView;    EditText editText;    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);     ... Read More

This example demonstrates how do I create a Mediaplayer class to implement a basic audio player in 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.javaimport android.media.MediaPlayer; import android.os.Handler; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.ImageButton; import android.widget.SeekBar; import android.widget.TextView; import android.widget.Toast; import java.util.concurrent.TimeUnit; public ... Read More

This example demonstrates how do I centre align action bar title 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.app.ActionBar; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);       getSupportActionBar().setCustomView(R.layout.activity_main);    } }Step 4 − Add the ... Read More

This example demonstrates how do I make a specific text on TextView bold 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 – Create a layout resourse file and add the following code in customdialog.xml             Step 3 − Add the following code to src/MainActivity.javaimport android.app.Dialog; import android.content.Context; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.Toast; public class MainActivity ... Read More

This example demonstrates how do I change app language when user selects language.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.Intent; import android.content.res.Configuration; import android.content.res.Resources; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.DisplayMetrics; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.Toast; import java.util.ArrayList; import java.util.List; import java.util.Locale; public class MainActivity extends AppCompatActivity {    Spinner spinner;    Locale locale;    String ... Read More

This example demonstrates how do I ButterKnife 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 – Open build.gradle(Module App) and add the following dependencyimplementation 'com.jakewharton:butterknife:8.8.1' annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'Step 4 − Add the following code to src/MainActivity.javaimport android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import butterknife.BindView; import butterknife.ButterKnife; public class MainActivity extends AppCompatActivity {    @BindView(R.id.textView)    TextView textView;    @BindView(R.id.textView2)   ... Read More

This example demonstrates how do I convert java bitmap to byte array 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.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.ImageView; import android.widget.Toast; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; public class MainActivity extends AppCompatActivity {    Button button;    ImageView ivSource, ivCompressed;    @Override    protected ... Read More

This example demonstrates how do I use drag and drop 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.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.DragEvent; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.LinearLayout; public class MainActivity extends AppCompatActivity implements View.OnTouchListener, View.OnDragListener {    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);     ... Read More

This example demonstrates how do I make a specific text on TextView bold 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.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.CheckBox; import android.widget.Toast; public class MainActivity extends AppCompatActivity {    CheckBox pizza, coffee, burger;    Button buttonOrder;    @Override    protected void onCreate(Bundle savedInstanceState) {   ... Read More