如何从Android设备打印的图像和一些数据，使用打印机（通过蓝牙打印）？ [英] How to print image and some data from an android device, using printer (print via bluetooth)?

问题描述

我开发一个应用程序中，我要打印一份收据，收据具有一个标志（静态）图像视图，我怎么能打印此蓝牙打印机？而且我已经采取了签名用GestureOverlayView，现在我要打印的姿态，以及与有关收据标​​志和一些数据。

I am developing one app in which i have to print one receipt, receipt has one logo(static) image view, how can i print this to bluetooth printer? and also i have taken signature by using GestureOverlayView, now i have to print that gesture as well along with logo and some data regarding the receipt.

和我需要打印一个阿拉伯语字符串为好。这显示在该文本显示。 为显示签名我使用的图像显示在我的布局。请检查图像， 我附上我所要打印的图像，请给我一些想法有关打印出来。

and i need to print one arabic string as well. which is shown in the TEXT VIEW. for showing signature i am using image view in my layout. Please check the image, i am attaching the image which i have to print, please give me some idea about printing it.

我可以更改打印格式，意味着我没有打印在矩形的数据，但图像对齐是主要的问题，我怎么会知道对齐？

i can change the format in printing, means i dont have to print data in rectangles, but image alignment is the main issue, how will i get to know about alignment?

推荐答案

尝试使用这个....

Try using this one....

公共类BluetoothPrint延伸活动{

public class BluetoothPrint extends Activity {

BluetoothAdapter mBTAdapter;
BluetoothSocket mBTSocket = null;
Dialog dialogProgress;
String BILL, TRANS_ID;
String PRINTER_MAC_ID;
final String ERROR_MESSAGE = "There has been an error in printing the bill.";

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {

// BILL = getIntent().getStringExtra("TO_PRINT");
// TRANS_ID = getIntent().getStringExtra("TRANS_ID");

// PRINTER_MAC_ID = getIntent().getStringExtra("MAC_ID");
PRINTER_MAC_ID = "00:1F:B7:02:8F:44";
//PRINTER_MAC_ID = "00:12:F3:0D:A3:E6";
// TRANS_ID="12345678";
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();
dialogProgress = new Dialog(BluetoothPrint.this);

try {
if (mBTAdapter.isDiscovering())
mBTAdapter.cancelDiscovery();
else
mBTAdapter.startDiscovery();
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
}
System.out.println("BT Searching status :"
+ mBTAdapter.isDiscovering());
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.setTitle("Finding printer...");
dialogProgress
.setOnDismissListener(new DialogInterface.OnDismissListener() {
public void onDismiss(DialogInterface dialog) {
dialog.dismiss();
setResult(RESULT_CANCELED);
finish();
}
});
dialogProgress.show();

}

} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
}
}

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);


//mBTSocket.close();
setResult(RESULT_OK);
finish();
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
//Toast.makeText(BluetoothPrint.this, ERROR_MESSAGE, Toast.LENGTH_SHORT).show();
e.printStackTrace();
setResult(RESULT_CANCELED);
finish();

}

runOnUiThread(new Runnable() {

public void run() {
try {
dialogProgress.dismiss();
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
}
}

});

}

}).start();
}

@Override
protected void onDestroy() {
Log.i("Dest ", "Checking Ddest");
super.onDestroy();
try {
if(dialogProgress != null)
dialogProgress.dismiss();
if (mBTAdapter != null)
mBTAdapter.cancelDiscovery();
this.unregisterReceiver(mReceiver);
} 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(BluetoothPrint.this,
device.getName() + " Printing data",
Toast.LENGTH_LONG).show();
printBillToDevice(PRINTER_MAC_ID);
Toast.makeText(BluetoothPrint.this,
device.getName() + " found", Toast.LENGTH_LONG)
.show();
}
}
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
//Toast.makeText(BluetoothPrint.this, ERROR_MESSAGE, Toast.LENGTH_SHORT).show();

}
}
};

@Override
public void onBackPressed() {
try {
if (mBTAdapter != null)
mBTAdapter.cancelDiscovery();
this.unregisterReceiver(mReceiver);
} catch (Exception e) {
Log.e("Class ", "My Exe ", e);
}
setResult(RESULT_CANCELED);
finish();
}

}

从Android的此链接蓝牙打印机问题

from this link Bluetooth Printer issue in android

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