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private void doExit() {
	AlertDialog.Builder ab = new AlertDialog.Builder(MainActivity.this);
	ab.setMessage("Are you sure you want to exit?")
			.setPositiveButton("Yes", dialogClickListener)
			.setNegativeButton("No", dialogClickListener).show();
}

private DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() {
	@Override
	public void onClick(DialogInterface dialog, int which) {

tediscript

- (UIImage *)imageWithImage:(UIImage *)image scaledToSize:(CGSize)newSize {
    //UIGraphicsBeginImageContext(newSize);
    UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
    [image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();    
    UIGraphicsEndImageContext();
    return newImage;
}

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- (UIImage*) drawText:(NSString*)text inImage:(UIImage*)bgImage atPoint:(CGPoint)point withSize:(CGFloat)size withColor:(UIColor*) color {
    UIGraphicsBeginImageContextWithOptions(bgImage.size, FALSE, 0.0);
    [bgImage drawInRect:CGRectMake( 0, 0, bgImage.size.width, bgImage.size.height)];
    
    UIFont *font = [UIFont boldSystemFontOfSize:size];
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(ctx, color.CGColor);
    [text drawAtPoint:point withFont:font];
    
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();

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[UIFont boldSystemFontOfSize:17.0];

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- (UIImage*) drawImage:(UIImage*) fgImage inImage:(UIImage*) bgImage atPoint:(CGPoint)  point {
    UIGraphicsBeginImageContextWithOptions(bgImage.size, FALSE, 0.0);
    [bgImage drawInRect:CGRectMake( 0, 0, bgImage.size.width, bgImage.size.height)];
    [fgImage drawInRect:CGRectMake( point.x, point.y, fgImage.size.width, fgImage.size.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return newImage;
}

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NSString *url = @"http://www.developerfeed.com/search.jsp?params=Java Developer";
NSString* encodedUrl = [url stringByAddingPercentEscapesUsingEncoding: NSASCIIStringEncoding];

NSLog(@"Encoded URL %@",encodedUrl);
// output will be
//http://www.developerfeed.com/search.jsp?params=Java%20Developer;

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NSString *string1 = @"This is";
NSString *string2 = @" a test.";
NSString *string3 = [string1 stringByAppendingString:string2];
// string3 is now @"This is a test."  string1 and string2 are unchanged.

//You can also assign the new string back to string1:

NSString *string1 = @"This is";
NSString *string2 = @" a test.";
string1 = [string1 stringByAppendingString:string2];

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button.titleLabel.textAlignment = NSTextAlignmentCenter;

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NSArray *items = [dataDictionary objectForKey:@"items"];

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[self.tableView reloadData];