We have an android app in order to print images using the android sdk for zebra (ZSDK_ANDROID_API.jar). The printer is the ZQ320 model and is in ZPL_HYBRID mode.
The same app with the same printer in some devices doesn't work: the bluetooth light flashing but it stopping flashing and ending up not printing anything meanwhile in other devices prints okey.
We are trying finding out if any exception is thrown but it seems no exception throws in all code as far as we know.
One of the devices that produces the issue has the following OS data:
Model: SAMSUNG S-10.
Android version: 11
knox VERSION: knox API LEVEL 33.
UI version: 3.1
Please could anyone give us a clue or some strategy to debug the problem?
Thanks in advance.
public static void printBitmapZebra(ZebraPrinter printer, Bitmap path) throws ConnectionException {
String setSizeCommand = "^XA^LL" + path.getHeight() + "^XZ";
// Sets size.
printer.sendCommand(setSizeCommand);
ZebraImageAndroid oZebraImage = new ZebraImageAndroid(path);
printer.printImage(
oZebraImage, 0, 0,
path.getWidth(),
path.getHeight(), false);
}
And previous method is invoked from this from UI:
public void onClickPrint(View view) {
new Thread(() -> {
Connection connection = null;
try {
String mac = macAddress.getText().toString();
if (isNullOrEmpty(mac)) {
runOnUiThread(() -> UIHelper.showCustomToast(
this,
"Debe de especificar una dirección para la impresora."));
return;
}
showModalLoadingDialog("Impresión", "Generando imagen");
Bitmap bm = BitmapUtils.getBitmapFromWebview(oWebViewBmpGenerator);
BitmapUtils.saveBitmapToTempFolder(this,bm);
bm = BitmapUtils.toGrayScale(bm);
bm = BitmapUtils.getScaledPrinterBitmap(bm, 203); // 203 -> ZEBRA ZQ320
if (bm == null) {
throw new Exception("No se generó una imagen para imprimir.");
}
updateLoadingDialog( "Conectando con la impresora");
SettingsHelper.saveBluetoothAddress(PrintZebraActivity.this, mac);
connection = new BluetoothConnection(macAddress.getText().toString());
connection.open();
ZebraPrintUtils.setStatus(connection);
ZebraPrinter printer = ZebraPrinterFactory.getInstance(connection);
updateLoadingDialog("Enviando imagen");
ZebraPrintUtils.printBitmapZebra(printer, bm);
connection.close();
connection = null;
} catch (Exception e) {
cclsLog.log(this, e);
UIHelper.showWarning(this, e);
} finally {
dismissModalProgressDialog();
if (connection != null) {
try {
connection.close();
} catch (Exception ignored) {
}
}
}
}).start();
}