Here is a report on Android Operating System, devices, market share, etc. up to May 2016.
Have a look at the video for the same.
[youtube=https://www.youtube.com/watch?v=MJQCCy0CNdM]
Tutorials
Parcelable Vs Serializable
Android Tutorials
Objectives :
- What is Parcelable?
- What is Serializable?
- What are the differences between Parcelable and Serializable?
- Explain : Parcelable Vs. Serializable
- What is Parcelable and Serializable in Android?
Parcelable Vs. Serializable
|
Parameter |
Parcelable | Serializable |
| What is it? | Google developped Parcelable for better performance on android | Serializable is a standard Java interface |
| Purpose | For marshaling and unmarshaling Java objects | For marshaling and unmarshaling Java objects |
| Package | android.os | java.io |
| Speed | 10 times Faster than Serializable because it is optimized for usage on android development | Slower than Parcelable |
| Implementation Time | Requires more time than Serializable | Requires very less time as compared to Parcelable |
| Degree of Implementation | Difficult | Easier than Parcelable |
| Memory | Less temporary objects | Serializable interface create a lot of temporary objects and cause quite a bit of garbage collection |
| Use with Intent | Parcelable array can be pass via Intent in android |
Cannot be used with Intent |
How to spoof or fake GPS location in Marshmallow?
Android Tutorials
Objectives :
- How to spoof GPS location in Marshmallow?
- How to fake GPS location in Marshmallow?
To spoof / fake GPS location in Marshmallow follow the steps below :
- Go to “Settings”
- Go to “About phone”
- Scroll to the bottom until you see Build Number.
- Repeatedly tap it until you unlock “Developer options”
- Go back to “Settings”
- Right above “About phone”, you will now see “Developer options”.
- Look for “Select mock location app”
- Click on this to select the app you use to GPS spoof.
Subscribe blog for more updates.
How to change editor full screen in NetBeans IDE?
Objectives :
- How to change editor full screen in NetBeans IDE?
NetBeans IDE is having a new and great feature where we can full screen the code editor window.
This small video tutorial shows how to change editor full screen in NetBeans IDE?
[youtube=”https://www.youtube.com/watch?v=w49znamwczw&feature=youtu.be”]
Being a trainer, I need to share screen with code and sometime only code nothing else. This is one of the most useful feature for me while teaching Java technologies and UI technologies such as HTML5, CSS, JS, etc. This is why I love NetBeans IDE a lot.
Hope this tutorial is helpful for you as well.
Java Program to convert Decimal values to Hexadecimal values
Objectives :
- How to convert Decimal to Hexadecimal in Java?
Java Program to convert Decimal values to Hexadecimal values :
[sourcecode lang=”java”]
import java.util.Scanner;
public class DecimalToHexadecimal {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter decimal number you like: ");
int deci = input.nextInt();
System.out.println("The hexadecimal number for decimal "
+ deci + " is " + convert(deci));
}
public static String convert(int decimal) {
String hex = "";
while (decimal != 0) {
int hexValue = decimal % 16;
hex = toHexadecimal(hexValue) + hex;
decimal = decimal / 16;
}
return hex;
}
public static char toHexadecimal(int hexValue) {
if (hexValue <= 9 && hexValue >= 0) {
return (char) (hexValue + ‘0’);
} else {
return (char) (hexValue – 10 + ‘A’);
}
}
}
[/sourcecode]
Output :
Enter decimal number you like: 1234
The hexadecimal number for decimal 1234 is 4D2
Java Program to Convert Decimal Number to Roman Number
Objectives :
- Convert Decimal number to Roman number
- Convert Decimal numeral to Roman numeral
- How to convert a decimal number to roman number
- Write a program that converts a decimal number to Roman number.
- Write a program that converts a decimal number to Roman number. Decimal Number is accepted using Scanner class at the time of execution.
- Write a program that converts a decimal number to Roman number. Decimal Number is accepted as command line input at the time of execution.
Program :
Java program that converts a decimal number to Roman number. Decimal Number is accepted using Scanner class at the time of execution.
[sourcecode lang=”java”]
import java.util.Scanner;
public class DecimalToRoman {
private static String toRoman(int num) {
String[] romanCharacters = { "M", "CM", "D", "C", "XC", "L", "X", "IX", "V", "I" };
int[] romanValues = { 1000, 900, 500, 100, 90, 50, 10, 9, 5, 1 };
String result = "";
for (int i = 0; i < romanValues.length; i++) {
int numberInPlace = num / romanValues[i];
if (numberInPlace == 0) continue;
result += numberInPlace == 4 && i > 0? romanCharacters[i] + romanCharacters[i – 1]:
new String(new char[numberInPlace]).replace("\0",romanCharacters[i]);
num = num % romanValues[i];
}
return result;
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter a number : ");
int decimal = scanner.nextInt();
System.out.println(toRoman(decimal));
}
}
[/sourcecode]
Output :
Enter a number : 1234
MCCXXXIV
Java program that converts a decimal number to Roman number. Decimal Number is accepted as command line input at the time of execution.
[sourcecode lang=”java”]
public class DecimalToRoman {
private static String toRoman(int num) {
String[] romanCharacters = { "M", "CM", "D", "C", "XC", "L", "X", "IX", "V", "I" };
int[] romanValues = { 1000, 900, 500, 100, 90, 50, 10, 9, 5, 1 };
String result = "";
for (int i = 0; i < romanValues.length; i++) {
int numberInPlace = num / romanValues[i];
if (numberInPlace == 0) continue;
result += numberInPlace == 4 && i > 0? romanCharacters[i] + romanCharacters[i – 1]:
new String(new char[numberInPlace]).replace("\0",romanCharacters[i]);
num = num % romanValues[i];
}
return result;
}
public static void main(String[] args) {
if(args.length<1 || args.length>1){
System.out.println("Wrong input");
}else{
String number = args[0];
int decimal = Integer.parseInt(number);
System.out.println(toRoman(decimal));
}
}
}
[/sourcecode]
Raspberry Pi 3 VS Raspberry Pi 2
| Particulars | Raspberry Pi 3 Model B | Raspberry Pi 2 Model B |
| Processor Chipset | Broadcom BCM2837 64Bit Quad Core Processor powered Single Board Computer running at 1.2GHz | Broadcom BCM2836 32Bit Quad Core Processor powered Single Board Computer running at 900MHz |
| Processor Speed | QUAD Core @1.2 GHz | QUAD Core @900 MHz |
| RAM | 1GB SDRAM @ 400 MHz | 1GB SDRAM @ 400 MHz |
| Storage | MicroSD | MicroSD |
| USB 2.0 | 4x USB Ports | 4x USB Ports |
| Max Power Draw/voltage | 2.5A @ 5V | 1.8A @ 5V |
| GPIO | 40 pin | 40 pin |
| Ethernet Port | Yes | Yes |
| WiFi | Built in | No |
| Bluetooth LE | Built in | No |
Visit here for Raspberry Pi Training
Passing data between activities in Android
Objective :
- Passing data between activities in Android
- Passing multiple data between activities in Android
- Passing array between activities in Android
- Passing ArrayList between activities in Android
- Passing ArrayList to another activity in Android
- Sending data via Intent in Android
- Sending multiple data via Intent in Android
- Sending array between activities in Android
- Sending ArrayList between activities in Android
- Sending ArrayList to another activity in Android
- Sending data via Intent and Bundle in Android
- Sending multiple data via Intent and Bundle in Android
- Passing array between activities in Android using Intent and Bundle
- How to pass array to another activity in Android?
- How to pass array between activities in Android?
- How to pass data to another activity in Android?
- How to pass data to activity in Android?
- How to pass data to between activities in Android?
- How to pass ArrayList to another activity in Android?
- How to pass ArrayList between activities in Android?
Code for passing data between activities in Android :
ActivityOne.java
[sourcecode lang=”java”]
String value = "Hello!";
Intent in = new Intent(this,ActivityTwo.class);
in.putExtra("Key", value);
startActivity(in);
[/sourcecode]
ActivityTwo.java
[sourcecode lang=”java”]
Bundle bundle = getIntent().getExtras();
String valueReceived = bundle .getString("Key");
[/sourcecode]
Code for passing multiple data or values between activities in Android :
Method 1 : Using Intent to pass data and Bundle to extract data between activities in Android
ActivityOne.java
[sourcecode lang=”java”]
String value1 = "Hello!";
String value2 = "Hi!";
Intent in = new Intent(this,ActivityTwo.class);
in.putExtra("Key1", value1);
in.putExtra("Key2", value2);
startActivity(in);
[/sourcecode]
ActivityTwo.java
[sourcecode lang=”java”]
Bundle bundle = getIntent().getExtras();
String valueReceived1 = bundle .getString("Key1");
String valueReceived2 = bundle .getString("Key2");
[/sourcecode]
Method 2 : Using Bundle to pass and to extract data between activities in Android
ActivityOne.java
[sourcecode lang=”java”]
String value1 = "Hello!";
String value2 = "Hi!";
Intent in = new Intent(this,ActivityTwo.class);
Bundle bundle = new Bundle();
bundle.putString("Key1", value1);
bundle.putString("Key2", value2);
in.putExtras(bundle);
startActivity(in);
[/sourcecode]
ActivityTwo.java
[sourcecode lang=”java”]
Bundle bundle = getIntent().getExtras();
String valueReceived1 = bundle .getString("Key1");
String valueReceived2 = bundle .getString("Key2");
[/sourcecode]
Code for passing array between activities in Android :
ActivityOne.java
[sourcecode lang=”java”]
String[] array = new String[]{"Item1", "Item2", "item3", "Item4", "item5"};
Intent in = new Intent(this,ActivityTwo.class);
Bundle bundle = new Bundle();
bundle.putStringArray("MyArray", array);
in.putExtras(bundle);
startActivity(in);
[/sourcecode]
ActivityTwo.java
[sourcecode lang=”java”]
Bundle bundle = getIntent().getExtras();
String arrayReceived[] = bundle.getStringArray("MyArray");
[/sourcecode]
Code for passing ArrayList between activities in Android :
ActivityOne.java
[sourcecode lang=”java”]
ArrayList<String> array = new ArrayList<String>();
array.add("Hello");
array.add("Hi");
array.add("Bye");
Intent intent = new Intent(this, ActivityTwo.class);
intent.putExtra("array_list", array);
startActivity(intent);
[/sourcecode]
ActivityTwo.java
[sourcecode lang=”java”]
Bundle bundle = getIntent().getExtras();
ArrayList<String> array = (ArrayList<String>) bundle.getStringArrayList("array_list");
[/sourcecode]
Have fun with Intent.
Java Program to Convert Binary to Decimal
Objectives :
- Binary to Decimal Conversion
- Converting Binary to Decimal
- Write a program to convert binary to decimal
- Write a program to convert binary number to decimal format
- Write a program to convert binary to decimal using Scanner class
- Write a program to convert binary to decimal, take input using Scanner class
Java Program :
[sourcecode lang=”java”]
import java.util.Scanner;
public class BinaryToDecimal {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter binary number: ");
String binary = scanner.nextLine();
int decimal = binaryToDecimal(binary);
System.out.println("Decimal equivalent of "+ binary +" is "+ decimal);
}
private static int binaryToDecimal(String binary) {
final int base = 2;
int decimal = 0;
for (int i = 0; i < binary.length(); i++) {
if (binary.charAt(i) == ‘0’) {
decimal += 0 * Math.pow(base, binary.length() – i – 1);
} else if (binary.charAt(i) == ‘1’) {
decimal += 1 * Math.pow(base, binary.length() – i – 1);
} else {
System.out.println("Invalid Binary Number");
System.out.println("Binary Number Contains only 0’s or 1’s");
System.exit(0);
}
}
return decimal;
}
}
[/sourcecode]
Output :
Enter binary number: 1110
Decimal equivalent of 1110 is 14
Java Program to convert Decimal to Binary
Objectives :
- Decimal to Binary Conversion
- Converting Decimal to Binary
- Converting Decimal Number to Binary format
- Write a program to convert decimal to binary
- Write a program to convert decimal number to binary format
- Write a program to convert positive decimal number to binary format
- Write a program to convert decimal to binary using Scanner class
- Write a program to convert decimal to binary, take input using Scanner class
Java Program to convert Decimal to Binary :
[sourcecode lang=”java”]
public class DecimalToBinary {
public void toBinary(int number){
int binary[] = new int[25];
int n = 0;
// Convert Decimal to Binary
while(number > 0){
binary[n++] = number%2;
number = number/2;
}
// Print Binary number
for(int i = n-1;i >= 0;i–){
System.out.print(binary[i]);
}
}
public static void main(String[] args){
DecimalToBinary obj = new DecimalToBinary();
obj.toBinary(14);
}
}
[/sourcecode]
Output :
1110
Java Program to convert Decimal to Binary using Scanner class :
[sourcecode lang=”java”]
import java.util.Scanner;
public class DecimalToBinary {
public void toBinary(int number){
int binary[] = new int[14];
int n = 0;
// Convert Decimal to Binary
while(number > 0){
binary[n++] = number%2;
number = number/2;
}
// Print Binary Number
for(int i = n-1;i >= 0;i–){
System.out.print(binary[i]);
}
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter a number: ");
int num= scanner.nextInt();
DecimalToBinary obj = new DecimalToBinary();
obj.toBinary(num);
}
}
[/sourcecode]
Output :
Enter a number: 14
1110