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У меня есть проблема с печатью изображения на принтер AGPtEK 58 мм Mini Bluetooth Pocket POS Thermal Receipt. Я пытаюсь преобразовать содержимое веб-изображения в изображение (это работает нормально), и после этого я хочу распечатать его с помощью этого принтера, но он печатает только сплошной черный фон. Вот мой код:Распечатать изображение через принтер bluetooth AGPtEK SC28
public class PrintDemo extends Activity {
private static final int REQUEST_ENABLE_BT = 2;
private static final int REQUEST_CONNECT_DEVICE = 1;
private static final int PERMISSIONS_REQUEST_BLUETOOTH = 1;
private static final String TAG_REQUEST_PERMISSION = "Request permission";
private static final int PERMISSIONS_REQUEST_INTERNET = 0;
private static final int PERMISSIONS_REQUEST_BT_ADMIN = 2;
private static final int PERMISSIONS_REQUEST_LOCATION = 3;
private static final String WEB_SITE = "Remembered Web Site";
private static final String IS_CHECKED = "Check box";
@Bind(R.id.btn_search)
Button btnSearch;
@Bind(R.id.btn_print)
Button btnSendDraw;
@Bind(R.id.btn_open)
Button btnSend;
@Bind(R.id.btn_close)
Button btnClose;
private final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case BluetoothService.MESSAGE_STATE_CHANGE:
switch (msg.arg1) {
case BluetoothService.STATE_CONNECTED:
Toast.makeText(getApplicationContext(), "Connect successful",
Toast.LENGTH_SHORT).show();
btnClose.setEnabled(true);
btnSend.setEnabled(true);
btnSendDraw.setEnabled(true);
break;
case BluetoothService.STATE_CONNECTING:
Log.d("State", "Connecting...");
break;
case BluetoothService.STATE_LISTEN:
case BluetoothService.STATE_NONE:
Log.d("State", "Not found");
break;
}
break;
case BluetoothService.MESSAGE_CONNECTION_LOST:
Toast.makeText(getApplicationContext(), "Device connection was lost",
Toast.LENGTH_SHORT).show();
btnClose.setEnabled(false);
btnSend.setEnabled(true);
btnSendDraw.setEnabled(false);
break;
case BluetoothService.MESSAGE_UNABLE_CONNECT:
Toast.makeText(getApplicationContext(), "Unable to connect device",
Toast.LENGTH_SHORT).show();
break;
}
}
};
String path;
File dir;
File file;
@Bind(R.id.check_box)
CheckBox checkBox;
@Bind(R.id.txt_content)
EditText edtContext;
@Bind(R.id.web_view)
WebView webView;
BluetoothService mService;
BluetoothDevice con_dev;
private SharedPreferences sharedPref;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Fabric.with(this, new Crashlytics());
setContentView(R.layout.main);
ButterKnife.bind(this);
mService = new BluetoothService(this, mHandler);
if (!mService.isAvailable()) {
Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
finish();
}
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setDefaultTextEncodingName("utf-8");
webView.setWebViewClient(new WebViewClient() {
@SuppressLint("SdCardPath")
@Override
public void onPageFinished(final WebView view, String url) {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
siteToImage(view);
}
}, 5000);
}
});
sharedPref = this.getPreferences(Context.MODE_PRIVATE);
checkPermissions();
}
private void siteToImage(WebView view) {
Picture picture = view.capturePicture();
Bitmap b = Bitmap.createBitmap(
picture.getWidth(), picture.getHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
picture.draw(c);
FileOutputStream fos;
try {
path = Environment.getExternalStorageDirectory().toString();
dir = new File(path, "/PrintDemo/media/img/");
if (!dir.isDirectory()) {
dir.mkdirs();
}
String arquivo = "darf_" + System.currentTimeMillis() + ".jpg";
file = new File(dir, arquivo);
fos = new FileOutputStream(file);
String imagePath = file.getAbsolutePath();
//scan the image so show up in album
MediaScannerConnection.scanFile(PrintDemo.this, new String[]{imagePath},
null, new MediaScannerConnection.OnScanCompletedListener() {
public void onScanCompleted(String path, Uri uri) {
}
});
if (fos != null) {
b.compress(Bitmap.CompressFormat.JPEG, 90, fos);
fos.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
private void setRememberedWeb() {
if (checkBox.isChecked()) {
String rememberedWeb = sharedPref.getString(WEB_SITE, "");
if (!rememberedWeb.equals("")) {
edtContext.setText(rememberedWeb);
}
}
}
@Override
protected void onPause() {
super.onPause();
saveState(checkBox.isChecked());
}
@Override
protected void onResume() {
super.onResume();
checkBox.setChecked(load());
setRememberedWeb();
}
private void saveState(boolean isChecked) {
SharedPreferences.Editor editor = sharedPref.edit();
editor.putBoolean(IS_CHECKED, isChecked);
if (isChecked) {
editor.putString(WEB_SITE, edtContext.getText().toString());
} else {
editor.putString(WEB_SITE, getString(R.string.txt_content));
}
editor.apply();
}
private boolean load() {
return sharedPref.getBoolean(IS_CHECKED, false);
}
private boolean checkPermissions() {
int permissionCheck =
ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH);
int permissionInternet =
ContextCompat.checkSelfPermission(this, Manifest.permission.INTERNET);
int permissionBTAdmin =
ContextCompat.checkSelfPermission(this, Manifest.permission.BLUETOOTH_ADMIN);
int permissionLocation =
ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION);
if (permissionCheck == PackageManager.PERMISSION_DENIED) {
edtContext.setText(R.string.no_bluetooth_permissions);
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.BLUETOOTH)) {
Toast.makeText(PrintDemo.this, TAG_REQUEST_PERMISSION, Toast.LENGTH_SHORT).show();
} else {
requestBTPermission();
}
return false;
} else if (permissionInternet == PackageManager.PERMISSION_DENIED) {
edtContext.setText(R.string.no_internet_permissions);
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.INTERNET)) {
Toast.makeText(PrintDemo.this, TAG_REQUEST_PERMISSION, Toast.LENGTH_SHORT).show();
} else {
requestInternetPermission();
}
return false;
} else if (permissionBTAdmin == PackageManager.PERMISSION_DENIED) {
edtContext.setText(R.string.no_bt_admin_permissions);
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.INTERNET)) {
Toast.makeText(PrintDemo.this, TAG_REQUEST_PERMISSION, Toast.LENGTH_SHORT).show();
} else {
requestBTAdminPermission();
}
return false;
} else if (permissionLocation == PackageManager.PERMISSION_DENIED) {
edtContext.setText(R.string.no_location_permissions);
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_COARSE_LOCATION)) {
Toast.makeText(PrintDemo.this, TAG_REQUEST_PERMISSION, Toast.LENGTH_SHORT).show();
} else {
requestLocationPermission();
}
return false;
} else {
return true;
}
}
private void requestLocationPermission() {
ActivityCompat
.requestPermissions(this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
PERMISSIONS_REQUEST_LOCATION);
}
private void requestBTAdminPermission() {
ActivityCompat
.requestPermissions(this, new String[]{Manifest.permission.BLUETOOTH_ADMIN},
PERMISSIONS_REQUEST_BT_ADMIN);
}
private void requestInternetPermission() {
ActivityCompat
.requestPermissions(this, new String[]{Manifest.permission.INTERNET},
PERMISSIONS_REQUEST_INTERNET);
}
private void requestBTPermission() {
ActivityCompat
.requestPermissions(this, new String[]{Manifest.permission.BLUETOOTH},
PERMISSIONS_REQUEST_BLUETOOTH);
}
@Override
public void onStart() {
super.onStart();
if (!mService.isBTopen()) {
Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
}
try {
btnSendDraw = (Button) this.findViewById(R.id.btn_print);
btnSendDraw.setOnClickListener(new ClickEvent());
btnSearch = (Button) this.findViewById(R.id.btn_search);
btnSearch.setOnClickListener(new ClickEvent());
btnSend = (Button) this.findViewById(R.id.btn_open);
btnSend.setOnClickListener(new ClickEvent());
btnClose = (Button) this.findViewById(R.id.btn_close);
btnClose.setOnClickListener(new ClickEvent());
edtContext = (EditText) findViewById(R.id.txt_content);
btnClose.setEnabled(false);
btnSend.setEnabled(true);
btnSendDraw.setEnabled(false);
} catch (Exception ex) {
Log.e("TAG", ex.getMessage());
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mService != null)
mService.stop();
mService = null;
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_ENABLE_BT:
if (resultCode == Activity.RESULT_OK) {
Toast.makeText(this, "Bluetooth open successful", Toast.LENGTH_LONG).show();
} else {
finish();
}
break;
case REQUEST_CONNECT_DEVICE:
if (resultCode == Activity.RESULT_OK) {
String address = data.getExtras()
.getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS);
con_dev = mService.getDevByMac(address);
mService.connect(con_dev);
}
break;
}
}
@SuppressLint("SdCardPath")
private void printImage() {
byte[] sendData;
PrintPic pg = new PrintPic();
pg.initCanvas(384);
pg.initPaint();
pg.drawImage(0, 0, file.getPath());
sendData = pg.printDraw();
mService.write(sendData);
}
public void downloadContent() {
if (!edtContext.getText().toString().equals("") && !edtContext.getText().toString().equals("https://")) {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(edtContext.getText().toString())
.build();
HttpService service = retrofit.create(HttpService.class);
Call<ResponseBody> result = service.getContent();
result.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Response<ResponseBody> response) {
try {
if (response.body() != null) {
String summary = response.body().string();
webView.loadData(summary, "text/html; charset=utf-8", null);
}
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void onFailure(Throwable t) {
}
});
}
}
public interface HttpService {
@GET("/")
Call<ResponseBody> getContent();
}
class ClickEvent implements View.OnClickListener {
public void onClick(View v) {
if (v == btnSearch) {
Intent serverIntent = new Intent(PrintDemo.this, DeviceListActivity.class);
startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE);
} else if (v == btnSend) {
downloadContent();
} else if (v == btnClose) {
mService.stop();
} else if (v == btnSendDraw) {
printImage();
}
}
}
}
В результате почти то, что я хочу, чтобы вы можете увидеть сами, но напечатанное изображение не ясно:
