deda9

import java.io.*;

interface Shape
{
	public void draw();
}

class Square implements Shape
{
	@Override

deda9

Button Background Selector insdide drawble folder ----------------------------------------------

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/numpad_button_bg_selected" android:state_selected="true"></item>
    <item android:drawable="@drawable/numpad_button_bg_pressed" android:state_pressed="true"></item>
    <item android:drawable="@drawable/numpad_button_bg_normal"></item>

</selector>

deda9

import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import java.io.ByteArrayOutputStream;

/**
 * Sketch Project Studio
 * Created by Angga on 12/04/2016 14.27.
 */
public class AppHelper {    

deda9

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.FragmentActivity;

import com.apptcom.external.logging.Logger;
import com.apptcom.external.model.UserSocialModel;
import com.google.android.gms.auth.api.Auth;
import com.google.android.gms.auth.api.signin.GoogleSignInAccount;
import com.google.android.gms.auth.api.signin.GoogleSignInOptions;

deda9

SHORTCUTS

Key/Command	Description
Tab	Auto-complete files and folder names
Ctrl + A	Go to the beginning of the line you are currently typing on
Ctrl + E	Go to the end of the line you are currently typing on
Ctrl + U	Clear the line before the cursor
Ctrl + K	Clear the line after the cursor
Ctrl + W	Delete the word before the cursor
Ctrl + T	Swap the last two characters before the cursor

deda9

let operation = BlockOperation.init()
let operationBlock = {
    print("I am operation Block")
}

operation.addExecutionBlock {
    operationBlock()
}

operation.start()

deda9

let operation = BlockOperation.init()
let operationBlock1 = {
    print("I am operation Block One")
}

let operationBlock2 = {
    print("I am operation Block Two")
}

operation.addExecutionBlock {

deda9

class CustomOperationBlock: Operation{
    
    private var data: Any!
    
    init(_ data: Any){
        self.data = data
    }
    
    override func main() {
        doWork()

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enum OperationState: Int {
    case ready
    case executing
    case finished
}

class CustomOperationBlock: Operation{
    
   private var state: OperationState!
    

deda9

let operationQueue = OperationQueue()

let op0 = BlockOperation()
op0.completionBlock = {
    print("op0 completionBlock")
}
op0.addExecutionBlock {
    print("op0 executionBlock #1")
}