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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 communicate between Activity and Service 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.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.support.v7.app.AppCompatActivity; public class MainActivity extends AppCompatActivity implements View.OnClickListener { Button buttonStart, buttonStop; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ... Read More
This example demonstrates how do I ping external IP from java 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.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.Toast; import java.io.IOException; public class MainActivity extends AppCompatActivity { Boolean isConnected = false, isWiFi = false, isMobile = false; @Override protected void onCreate(Bundle savedInstanceState) { ... Read More
This example demonstrates how do I check the amount of RAM to be used by 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.app.ActivityManager; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final TextView textView = findViewById(R.id.text); ... Read More
The HTML DOM Input Radio form property is used for returning the form reference that contains the given input radio button. If the radio button is outside the form then it will simply return NULL. This property is read-only.SyntaxFollowing is the syntax for input radio form property −radioObject.formExampleLet us look at an example for the Input radio form property. Input radio form Property FRUIT: Mango Get the form id by clicking on the below button GET FORM function formId() { var P=document.getElementById("Mango").form.id; document.getElementById("Sample").innerHTML = "The id of ... Read More
The HTML DOM input radio autofocus property is associated with the HTML element’s autofocus attribute. This property is used for setting or returning whether the input radio button automatically be focused when the page loads or not.SyntaxFollowing is the syntax for −Setting the autofocus property.radioObject.autofocus = true|falseHere, true represents the radio button should get focus and false represents otherwise. It is set to false by default.ExampleLet us look at an example for the Input Radio autofocus property − Input password autofocus property RADIO: CHECK FOCUS function FocusVal() { ... Read More
The borderImage property is used for setting or getting the border image of an element. It is a shorthand property, so that we can manipulate borderImageSource, borderImageSlice, borderImageWidth, borderImageOutset and borderImageRepeat properties at one go.SyntaxFollowing is the syntax for −Setting the borderImage property −object.style.borderImage = "source slice width outset repeat|initial|inherit"ValuesThe property values are explained as follows −Sr.NoValues & Description1borderImageSourceIt specifies the image path to be used as a border.2borderImageSliceIt specifies the image-border inward offsets.3borderImageWidthIt specifies the image-border width.4borderImageOutsetIt specifies the border image area amount by which it extends beyond the border box.5borderImageRepeatIt specifies that the image-border should be rounded, repeated ... Read More
Object.assign()This method is used to copy one or more source objects to a target object. It invokes getters and setters since it uses both 'get' on the source and 'Set' on the target. It returns the target object which has properties and values copied from the target object. This method does not throw on null or undefined source values.syntaxObject.assign(target, ...source objects);It takes source objects and a target object as parameters and push the source objects into the target object and display the target object.Example-1In the following example, the properties from the source objects "obj1", "obj2", and "obj3" were pushed into ... Read More
In this section we will see one interesting problem. Suppose one number is given. We have to increase this number by 1. This is extremely simple task. But here we will place the number as an array. each digit of that number is placed as an element of the array. If the number is 512, then it will be stored as {5, 1, 2}. And also we have to increase the number using recursive approach. Let us see the algorithm to get the clear idea.Algorithmincrement(arr, n, index) −Initially the default value of index is 0 begin if index < ... Read More
Here we will see some basic differences between C++, Java and the Python. At first we will see the C++ and Java differences, then the Java and Python differences.TopicC++JavaMemory ManagementIt uses pointers, structures, unions and referencesIt does not support pointers. It supports references. It also supports Threads, interfacesLibrariesLow level functional librariesWide range of library, with various functionalitiesMultiple InheritanceSupports multiple inheritance using normal classesSupports multiple inheritance with only interfaces (pure abstract classes)Operating OverloadingOperator overloading is supportedDoes not support operator overloadingProgram HandlingFunctions and variables can reside outside of the classesFunctions, variables can only be there inside classes or packagesPortabilityCode is dependent on ... Read More