我正在开发一个应用程序,其中我必须打印一张收据,收据有一个徽标(静态)图像视图,我该如何打印到蓝牙打印机？我也使用GestureOverlayView进行签名,现在我必须打印该手势以及有关收据的徽标和一些数据.
我还需要打印一个阿拉伯字符串.这在文本视图中显示.
为了显示签名我在我的布局中使用图像视图.请检查图像,
我正在附上我必须打印的图像,请给我一些关于打印它的想法.
我可以改变打印格式,意味着我不必在矩形中打印数据,但图像对齐是主要问题,我将如何了解对齐？
最佳答案
尝试使用这个….
public class BluetoothPrinterActivity extends Activity {
BluetoothAdapter mBTAdapter;
BluetoothSocket mBTSocket = null;
Dialog dialogProgress;
String BILL,TRANS_ID;
String PRINTER_MAC_ID = "00:1F:B7:02:8F:44";
final String ERROR_MESSAGE = "There has been an error in printing the bill.";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
BILL = "\nSale Slip No: 12345678" + " " + "04-08-2011\n";
BILL = BILL + "----------------------------------------";
BILL = BILL + "\n\n";
BILL = BILL + "Total Qty:" + " " + "2.0\n";
BILL = BILL + "Total Value:" + " " + "17625.0\n";
BILL = BILL + "-----------------------------------------";
mBTAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBTAdapter == null) {
Toast.makeText(this,"Device has no bluetooth capability",Toast.LENGTH_LONG).show();
finish();
} else {
if (!mBTAdapter.isEnabled()) {
Intent i = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(i,0);
}
// Register the BroadcastReceiver
IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
registerReceiver(mReceiver,filter); // Don't forget to unregister during onDestroy
dialogProgress = new Dialog(BluetoothPrinterActivity.this);
dialogProgress.setTitle("Finding printer...");
dialogProgress.setOnDismissListener(new DialogInterface.OnDismissListener() {
public void onDismiss(DialogInterface dialog) {
dialog.dismiss();
setResult(RESULT_CANCELED);
finish();
}
});
dialogProgress.show();
}
if (mBTAdapter.isDiscovering())
mBTAdapter.cancelDiscovery();
else
mBTAdapter.startDiscovery();
System.out.println("BT Searching status :" + mBTAdapter.isDiscovering());
} catch (Exception e) {
Log.e("Class ","My Exe ",e);
}
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context,Intent intent) {
try {
String action = intent.getAction();
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
System.out.println("***" + device.getName() + " : "+ device.getAddress());
if (device.getAddress().equalsIgnoreCase(PRINTER_MAC_ID)) {
mBTAdapter.cancelDiscovery();
dialogProgress.dismiss();
Toast.makeText(BluetoothPrinterActivity.this,device.getName() + " Printing data",Toast.LENGTH_LONG).show();
printBillToDevice(PRINTER_MAC_ID);
Toast.makeText(BluetoothPrinterActivity.this,device.getName() + " found",Toast.LENGTH_LONG).show();
}
}
} catch (Exception e) {
Log.e("Class ",e);
}
}
};
@Override
protected void onDestroy() {
super.onDestroy();
try {
if (dialogProgress != null)
dialogProgress.dismiss();
if (mBTAdapter != null)
mBTAdapter.cancelDiscovery();
this.unregisterReceiver(mReceiver);
} catch (Exception e) {
Log.e("Class ",e);
}
}
@Override
public void onBackPressed() {
try {
if (mBTAdapter != null)
mBTAdapter.cancelDiscovery();
this.unregisterReceiver(mReceiver);
} catch (Exception e) {
Log.e("Class ",e);
}
setResult(RESULT_CANCELED);
finish();
}
public void printBillToDevice(final String address) {
new Thread(new Runnable() {
public void run() {
runOnUiThread(new Runnable() {
public void run() {
dialogProgress.setTitle("Connecting...");
dialogProgress.show();
}
});
mBTAdapter.cancelDiscovery();
try {
System.out.println("**************************#****connecting");
BluetoothDevice mdevice = mBTAdapter.getRemoteDevice(address);
Method m = mdevice.getClass().getMethod("createRfcommSocket",new Class[] { int.class });
mBTSocket = (BluetoothSocket) m.invoke(mdevice,1);
mBTSocket.connect();
OutputStream os = mBTSocket.getOutputStream();
os.flush();
os.write(BILL.getBytes());
System.out.println(BILL);
setResult(RESULT_OK);
finish();
} catch (Exception e) {
Log.e("Class ",e);
e.printStackTrace();
setResult(RESULT_CANCELED);
finish();
}
runOnUiThread(new Runnable() {
public void run() {
try {
dialogProgress.dismiss();
} catch (Exception e) {
Log.e("Class ",e);
}
}
});
}
}).start();
}
}
