douglasjunior

import android.graphics.Bitmap;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
 * Created by douglas on 29/05/17.
 * Adapted from http://new-grumpy-mentat.blogspot.com.br/2014/06/java-escpos-image-printing.html
 */

douglasjunior

public class MyActivity extends Activity {
 
 public void onCreate(...){
   RecyclerView rv = findViewByIdCast(R.id.rv);
   // 2 is the number of columns 
   rv.setLayoutManager(new GridLayoutManager(this, 2)); 
   // Calculates the width of the "CardView" dynamically.
   int cardViewWidth = getResources().getDimension(R.dimen.my_cardview_width) + getResources().getDimension(R.dimen.my_cardview_margin) * 2;
   rv.getViewTreeObserver().addOnGlobalLayoutListener(new OnFlowLayoutListener(rv, cardViewWidth));
 }

douglasjunior

Começando com Node JS e Express

1. Instalar o Node JS 6.10 ou 6.11: https://nodejs.org/en/

2. Verifique se o Node e o NPM foram instalados corretamente.

   Para verificar a versão do NPM:

   npm --version 

douglasjunior

/**
 * Created by douglas on 02/05/16.
 */
public final class TooltipGenerator {

    private Activity activity;
    private Dialog dialog;
    private Context context;
    private List<SimpleTooltip> tooltips = new ArrayList<>();

douglasjunior

//
//  AsyncTask.swift
//
//  Created by Douglas Nassif Roma Junior on 08/06/15.
//  Copyright (c) 2015 Douglas Nassif Roma Junior. All rights reserved.
//

import Foundation

class AsyncTask<Params, Progress, Result> : NSObject {

douglasjunior

package com.emil.android.util;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;

/**
 * Check device's network connectivity and speed 
 * @author emil http://stackoverflow.com/users/220710/emil

douglasjunior

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

import okhttp3.MediaType;
import okhttp3.RequestBody;
import okio.BufferedSink;

douglasjunior

import android.content.Context;
import android.content.res.TypedArray;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.FrameLayout;

import java.util.ArrayList;
import java.util.List;

douglasjunior

import Foundation
import CoreBluetooth

class BluetoothWriter : NSObject {
    
    private weak var peripheral: CBPeripheral!;
    private weak var characteristic:  CBCharacteristic!;
    
    init(peripheral : CBPeripheral, characteristic:CBCharacteristic) {
        self.peripheral = peripheral;

douglasjunior

#import <Foundation/Foundation.h>
#import <CoreBluetooth/CoreBluetooth.h>

@interface BluetoothWriter : NSObject

-(id) initWithPeripheral:(CBPeripheral *) peripheral characteristic:(CBCharacteristic *)characteristic;

- (void) writeString:(NSString *) value;
- (void) writeData:(NSData *) value;
-(void) writeColorWithRed:(int)red withGreen:(int)green withBlue:(int)blue;