print

安卓手机打印demo

链接usb打印机

private void connectPrinter() {

	myOpertion = new UsbOperation(this, mHandler);
	//myOpertion.chooseDevice();

	UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
	HashMap<String, UsbDevice> devices = manager.getDeviceList();
	ArrayList<UsbDevice>	deviceList = new ArrayList<UsbDevice>();
	for (UsbDevice device : devices.values()) {
		if (USBPort.isUsbPrinter(device)) {
			deviceList.add(device);
		}
	}
	if(deviceList.size() > 0){
		final Intent intent = new Intent();
		Bundle bundle = new Bundle();
		bundle.putParcelable(UsbManager.EXTRA_DEVICE, deviceList.get(0));
		intent.putExtras(bundle);
		new Thread(new Runnable() {
			public void run() {
				myOpertion.open(intent);
			}
		}).start();
	}
}




/**
 * 打印二维码
 * 
 * @param mPrinter
 * @param value
 */
public static void printQRCode(PrinterInstance mPrinter, String value) {
	mPrinter.init();
	mPrinter.setCharacterMultiple(0, 0);
	mPrinter.setLeftMargin(15, 0);
	Barcode qrcode = new Barcode(BarcodeType.QRCODE, 2, 3, 6, value);
	mPrinter.printBarCode(qrcode);
}

public static void printQRCodeBitmap(Context con, PrinterInstance mPrinter,
		String value) {
	Bitmap bitmap = createQRCodeBitmap(value);
	mPrinter.init();
	mPrinter.setCharacterMultiple(0, 0);
	mPrinter.setLeftMargin(500, 0);
	mPrinter.printImage(bitmap);
}

/**
 * 换行
 * 
 * @param mPrinter
 */
public static void changeLine(PrinterInstance mPrinter, int num) {
	mPrinter.setPrinter(Command.PRINT_AND_WAKE_PAPER_BY_LINE, num); // 换1行
}

/**
 * 打印文字
 * 
 * @param mPrinter
 * @param str
 */
public static void printText(PrinterInstance mPrinter, String str) {
	mPrinter.printText(str);
}

/**
 * 切纸
 */
public static void cutPaper(PrinterInstance mPrinter) {
	mPrinter.cutPaper();
}

/**
 * 设置打印模式
 */
public static void setMode(PrinterInstance mPrinter, boolean isBold,
		boolean isDoubleHeight, boolean isDoubleWidth, boolean isUnderLine) {
	mPrinter.setPrintModel(isBold, isDoubleHeight, isDoubleWidth,
			isUnderLine);
}

public static void showToast(Context con, String txt) {
	Toast toa = Toast.makeText(con, txt, Toast.LENGTH_SHORT);
	toa.setGravity(Gravity.CENTER, 0, 0);
	toa.show();
}

// 生成二维码
public static Bitmap createQRCodeBitmap(String text) {
	int QR_WIDTH = 300, QR_HEIGHT = 300;
	try {
		// 需要引入core包
		if (text == null || "".equals(text) || text.length() < 1) {
			return null;
		}
		Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
		hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
		// 比特矩阵
		BitMatrix bitMatrix = new QRCodeWriter().encode(text,
				BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);
		int[] pixels = new int[QR_WIDTH * QR_HEIGHT];
		// 比特矩阵转颜色数组
		for (int y = 0; y < QR_HEIGHT; y++) {
			for (int x = 0; x < QR_WIDTH; x++) {
				if (bitMatrix.get(x, y)) {
					pixels[y * QR_WIDTH + x] = 0xff000000;// 黑点
				} else {
					pixels[y * QR_WIDTH + x] = 0xffffffff;// 透明点,白点为0xffffffff
				}

			}
		}
		// 解析颜色数组,其他的java平台可以选择其他的API
		Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH+100, QR_HEIGHT,
				Bitmap.Config.ARGB_8888);
		Canvas can = new Canvas(bitmap);
		Paint pa = new Paint();
		pa.setColor(Color.WHITE);
		can.drawRect(0, 0, bitmap.getWidth(), bitmap.getHeight(), pa);
		bitmap.setPixels(pixels, 0, QR_WIDTH, 50, 0, QR_WIDTH, QR_HEIGHT);
		return bitmap;
	} catch (WriterException e) {
		e.printStackTrace();
		return null;
	}
}

整理的比较乱，请多担待