This example demonstrates how do I rotate an image in ImageView by an angle 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 src/MainActivity.javaimport android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.ImageView; public class MainActivity extends AppCompatActivity {    ImageView imageView;    Button btnRotate;    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);   ... Read More

This example demonstrates how do I determine the size of an android view at run 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 – Copy and paste an image (.png/.jpg/.jpeg) into res/drawableStep 4 − Add the following code to src/MainActivity.javaimport android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.view.ViewTreeObserver; import android.widget.ImageView; import android.widget.TextView; public class MainActivity extends AppCompatActivity {    ImageView imageView;    @Override    protected void onCreate(Bundle savedInstanceState) { ... Read More

This example demonstrates how do I get a bitmap from Url 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 – Copy and paste an image (.png/.jpg/.jpeg) into res/drawableStep 4 − Add the following code to src/MainActivity.javaimport android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.AsyncTask; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.ImageView; import java.io.IOException; import java.io.InputStream; public class MainActivity extends AppCompatActivity {    Bitmap ... Read More

This example demonstrates how do I use ScrollView 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.                                                                                       ... Read More

This example demonstrates how do I 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 new Java class (StartAppOnBoot.java) and add the following code −import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; public class StartAppOnBoot extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {    if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {       Intent i = new Intent(context, MainActivity.class);       i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);       ... Read More

This example demonstrates how do I start an android application at boot 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 – Create a new Java class (StartAppOnBoot.java) and add the following code −import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; public class StartAppOnBoot extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {       if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) {          Intent i = new Intent(context, ... Read More

This example demonstrates how do I get a list of installed android applications.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.ApplicationInfo; import android.content.pm.PackageInfo; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.widget.ArrayAdapter; import android.widget.ListView; import java.util.List; public class MainActivity extends AppCompatActivity {    ListView listView;    ArrayAdapter arrayAdapter;    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       ... Read More

This example demonstrates how do I obtain the phone number of the android phone 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 − Add the following code to src/MainActivity.javaimport android.Manifest; import android.content.Context; import android.content.pm.PackageManager; import android.support.annotation.NonNull; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.telephony.TelephonyManager; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity {    TextView textView;    private static final int REQUEST_CODE = 101;    @Override    protected ... Read More

This example demonstrates how do I send an object from one android activity to another using intents.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 an object from a java class (Message.java)import java.io.Serializable; public class Message implements Serializable {    private static final long serialVersionUID = 1L;    private String message;    public String getMessage(){       return message;    }    public void setMessage(String ... Read More

This example demonstrates how do I get fling gesture detection working in an 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.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.GestureDetector; import android.view.MotionEvent; import android.widget.Toast; public class MainActivity extends AppCompatActivity {    GestureDetector gestureDetector;    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       gestureDetector = new ... Read More