Common UTILS pattern

UTILS.java

public class UTILS {

	public static boolean LOG_ENABLED = true;

	public static class Log {
		public static void e(String tag, String message) {
			if (LOG_ENABLED) {
				android.util.Log.e(tag, message);
			}
		}

		public static void d(String tag, String message) {
			if (LOG_ENABLED) {
				android.util.Log.d(tag, message);
			}
		}
	}

	public static boolean isNetworkAvailable(Context ctx) {
		ConnectivityManager cm = (ConnectivityManager) ctx
				.getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo netInfo = cm.getActiveNetworkInfo();
		if (netInfo != null && netInfo.isConnectedOrConnecting()
				&& cm.getActiveNetworkInfo().isAvailable()
				&& cm.getActiveNetworkInfo().isConnected()) {
			return true;
		} else {
			return false;
		}
	}
	
	public static void showNetworkAlertDialog(Context mCtx) {
		// TODO Auto-generated method stub
		AlertDialog.Builder builder = new AlertDialog.Builder(mCtx);
		builder.setCancelable(false);
		builder.setTitle("Network Error");
		builder.setMessage("Internet is not available!");
		builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {

			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
			}
		});
		builder.create().show();
	}

	
	public final static boolean isValidEmail(CharSequence target) {
        return android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches();
	}
	
	public static String getAppPackageName(Context mContext)
	{
	    String app_package_name = mContext.getApplicationContext().getPackageName();
		return app_package_name;
	}

	
	public static String getAppVersion(Context mContext)
	{
		boolean shouldPretendAsLatest = true;
		
		String app_version = "0";
		PackageManager mPackageManager = mContext.getApplicationContext().getPackageManager();
	    try {
	    	app_version = mPackageManager.getPackageInfo(getAppPackageName(mContext), 0).versionName;
	    } catch (PackageManager.NameNotFoundException e) {
	        e.printStackTrace();
	    }
	    
	    if(shouldPretendAsLatest)
	    {
	    	app_version = "1.0.0.0";
	    }
		return app_version;
	}

	public static boolean isAppDirCreated()
	{
		if(Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) && !Environment.MEDIA_MOUNTED_READ_ONLY.equals(Environment.getExternalStorageState()))
		{
			File root = android.os.Environment.getExternalStorageDirectory();
			File dir = new File(root.getAbsolutePath() + "/"+CONSTANTS.app_dir);
			dir.mkdirs();
			return true;
		}
		return false;
		
	}
	
	public static boolean copyFile(String from, String to) {
        try {
            File sd = Environment.getExternalStorageDirectory();
            if (sd.canWrite()) {
                int end = from.toString().lastIndexOf("/");
                String str1 = from.toString().substring(0, end);
                String str2 = from.toString().substring(end+1, from.length());
                File source = new File(str1, str2);
                File destination= new File(to, str2);
                Log.d("source", source.getPath());
                Log.d("destination", destination.getPath());
                
                if (source.exists()) {
                    FileChannel src = new FileInputStream(source).getChannel();
                    FileChannel dst = new FileOutputStream(destination).getChannel();
                    dst.transferFrom(src, 0, src.size());
                    src.close();
                    dst.close();
                }
            }
            return true;
        } catch (Exception e) {
            return false;
        }
    }
	

	public static String getAppDirPath()
	{
		
		if(Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) && !Environment.MEDIA_MOUNTED_READ_ONLY.equals(Environment.getExternalStorageState()))
		{
			File root = android.os.Environment.getExternalStorageDirectory();
			File dir = new File(root.getAbsolutePath() + "/"+CONSTANTS.app_dir);
			dir.mkdirs();
			return dir.getPath();
/*			File mTargetFile = new File(dir, filename);
			return mTargetFile.getPath();
*/		}
		return "";
	}
	
	public static int getRandomNumber() {
	    Random r = new Random( System.currentTimeMillis() );
	    return (1 + r.nextInt(2)) * 10000 + r.nextInt(10000);
	}
	
//	2014-05-01T00:00:00
	
	public static String getFormattedDate(Date date)
	{
		String formatted_date = "";
		String pattern = "yyyy-MM-dd'T'HH:mm:ss";
		SimpleDateFormat sdf = new SimpleDateFormat(pattern);
		formatted_date = sdf.format(date);
		return formatted_date;
	}
	
	public static Intent getRateIntent(String target_package_name)
	{
		final String mRate_Url = "http://play.google.com/store/apps/details?id=";
		return new Intent(Intent.ACTION_VIEW,  Uri.parse(mRate_Url+target_package_name));
	}


}