Now a day the increasing popularity of android powered devices like Phone, Tablet, Camera it is also growing need of printing solution from this device. Sensing the market need now a day a lot of Printing Application on Google Play.
Printing from android based device is done by conventional three way Bluetooth, WiFi and USB cable.
Here I am going to discuss how to use Bluetooth to print Images from Android Device.
Create a android Project and named it as BluetoothPrinting, Now create a java class in your src folder and named it as "BluetoothShare.java" inside this Java Class put following code:
Now put this code in your MainActivity.java class . This Main Activity class is using your Util class("BluetoothShare.java") to send the data(here I am sending image file) for printing on a specific device.
Printing from android based device is done by conventional three way Bluetooth, WiFi and USB cable.
Here I am going to discuss how to use Bluetooth to print Images from Android Device.
Create a android Project and named it as BluetoothPrinting, Now create a java class in your src folder and named it as "BluetoothShare.java" inside this Java Class put following code:
import android.net.Uri;
import android.provider.BaseColumns;
public final class BluetoothShare implements BaseColumns {
private BluetoothShare() {
}
/**
* The permission to access the Bluetooth Share Manager
*/
public static final String PERMISSION_ACCESS = "android.permission.ACCESS_BLUETOOTH_SHARE";
/**
* The content:// URI for the data table in the provider
*/
public static final Uri CONTENT_URI = Uri.parse("content://com.android.bluetooth.opp/btopp");
/**
* Broadcast Action: this is sent by the Bluetooth Share component to
* transfer complete. The request detail could be retrieved by app * as _ID
* is specified in the intent's data.
*/
public static final String TRANSFER_COMPLETED_ACTION = "android.btopp.intent.action.TRANSFER_COMPLETE";
/**
* This is sent by the Bluetooth Share component to indicate there is an
* incoming file need user to confirm.
*/
public static final String INCOMING_FILE_CONFIRMATION_REQUEST_ACTION = "android.btopp.intent.action.INCOMING_FILE_NOTIFICATION";
/**
* This is sent by the Bluetooth Share component to indicate there is an
* incoming file request timeout and need update UI.
*/
public static final String USER_CONFIRMATION_TIMEOUT_ACTION = "android.btopp.intent.action.USER_CONFIRMATION_TIMEOUT";
/**
* The name of the column containing the URI of the file being
* sent/received.
* <P>
* Type: TEXT
* </P>
* <P>
* Owner can Init/Read
* </P>
*/
public static final String URI = "uri";
/**
* The name of the column containing the filename that the incoming file
* request recommends. When possible, the Bluetooth Share manager will
* attempt to use this filename, or a variation, as the actual name for the
* file.
* <P>
* Type: TEXT
* </P>
* <P>
* Owner can Init/Read
* </P>
*/
public static final String FILENAME_HINT = "hint";
/**
* The name of the column containing the filename where the shared file was
* actually stored.
* <P>
* Type: TEXT
* </P>
* <P>
* Owner can Read
* </P>
*/
public static final String _DATA = "_data";
/**
* The name of the column containing the MIME type of the shared file.
* <P>
* Type: TEXT
* </P>
* <P>
* Owner can Init/Read
* </P>
*/
public static final String MIMETYPE = "mimetype";
/**
* The name of the column containing the direction (Inbound/Outbound) of the
* transfer. See the DIRECTION_* constants for a list of legal values.
* <P>
* Type: INTEGER
* </P>
* <P>
* Owner can Init/Read
* </P>
*/
public static final String DIRECTION = "direction";
/**
* The name of the column containing Bluetooth Device Address that the
* transfer is associated with.
* <P>
* Type: TEXT
* </P>
* <P>
* Owner can Init/Read
* </P>
*/
public static final String DESTINATION = "destination";
/**
* The name of the column containing the flags that controls whether the
* transfer is displayed by the UI. See the VISIBILITY_* constants for a
* list of legal values.
* <P>
* Type: INTEGER
* </P>
* <P>
* Owner can Init/Read/Write
* </P>
*/
public static final String VISIBILITY = "visibility";
/**
* The name of the column containing the current user confirmation state of
* the transfer. Applications can write to this to confirm the transfer. the
* USER_CONFIRMATION_* constants for a list of legal values.
* <P>
* Type: INTEGER
* </P>
* <P>
* Owner can Init/Read/Write
* </P>
*/
public static final String USER_CONFIRMATION = "confirm";
/**
* The name of the column containing the current status of the transfer.
* Applications can read this to follow the progress of each download. See
* the STATUS_* constants for a list of legal values.
* <P>
* Type: INTEGER
* </P>
* <P>
* Owner can Read
* </P>
*/
public static final String STATUS = "status";
/**
* The name of the column containing the total size of the file being
* transferred.
* <P>
* Type: INTEGER
* </P>
* <P>
* Owner can Read
* </P>
*/
public static final String TOTAL_BYTES = "total_bytes";
/**
* The name of the column containing the size of the part of the file that
* has been transferred so far.
* <P>
* Type: INTEGER
* </P>
* <P>
* Owner can Read
* </P>
*/
public static final String CURRENT_BYTES = "current_bytes";
/**
* The name of the column containing the timestamp when the transfer is
* initialized.
* <P>
* Type: INTEGER
* </P>
* <P>
* Owner can Read
* </P>
*/
public static final String TIMESTAMP = "timestamp";
/**
* This transfer is outbound, e.g. share file to other device.
*/
public static final int DIRECTION_OUTBOUND = 0;
/**
* This transfer is inbound, e.g. receive file from other device.
*/
public static final int DIRECTION_INBOUND = 1;
/**
* This transfer is waiting for user confirmation.
*/
public static final int USER_CONFIRMATION_PENDING = 0;
/**
* This transfer is confirmed by user.
*/
public static final int USER_CONFIRMATION_CONFIRMED = 1;
/**
* This transfer is auto-confirmed per previous user confirmation.
*/
public static final int USER_CONFIRMATION_AUTO_CONFIRMED = 2;
/**
* This transfer is denied by user.
*/
public static final int USER_CONFIRMATION_DENIED = 3;
/**
* This transfer is timeout before user action.
*/
public static final int USER_CONFIRMATION_TIMEOUT = 4;
/**
* This transfer is visible and shows in the notifications while in progress
* and after completion.
*/
public static final int VISIBILITY_VISIBLE = 0;
/**
* This transfer doesn't show in the notifications.
*/
public static final int VISIBILITY_HIDDEN = 1;
/**
* Returns whether the status is informational (i.e. 1xx).
*/
public static boolean isStatusInformational(int status) {
return (status >= 100 && status < 200);
}
/**
* Returns whether the transfer is suspended. (i.e. whether the transfer
* won't complete without some action from outside the transfer manager).
*/
public static boolean isStatusSuspended(int status) {
return (status == STATUS_PENDING);
}
/**
* Returns whether the status is a success (i.e. 2xx).
*/
public static boolean isStatusSuccess(int status) {
return (status >= 200 && status < 300);
}
/**
* Returns whether the status is an error (i.e. 4xx or 5xx).
*/
public static boolean isStatusError(int status) {
return (status >= 400 && status < 600);
}
/**
* Returns whether the status is a client error (i.e. 4xx).
*/
public static boolean isStatusClientError(int status) {
return (status >= 400 && status < 500);
}
/**
* Returns whether the status is a server error (i.e. 5xx).
*/
public static boolean isStatusServerError(int status) {
return (status >= 500 && status < 600);
}
/**
* Returns whether the transfer has completed (either with success or
* error).
*/
public static boolean isStatusCompleted(int status) {
return (status >= 200 && status < 300) || (status >= 400 && status < 600);
}
/**
* This transfer hasn't stated yet
*/
public static final int STATUS_PENDING = 190;
/**
* This transfer has started
*/
public static final int STATUS_RUNNING = 192;
/**
* This transfer has successfully completed. Warning: there might be other
* status values that indicate success in the future. Use isSucccess() to
* capture the entire category.
*/
public static final int STATUS_SUCCESS = 200;
/**
* This request couldn't be parsed. This is also used when processing
* requests with unknown/unsupported URI schemes.
*/
public static final int STATUS_BAD_REQUEST = 400;
/**
* This transfer is forbidden by target device.
*/
public static final int STATUS_FORBIDDEN = 403;
/**
* This transfer can't be performed because the content cannot be handled.
*/
public static final int STATUS_NOT_ACCEPTABLE = 406;
/**
* This transfer cannot be performed because the length cannot be determined
* accurately. This is the code for the HTTP error "Length Required", which
* is typically used when making requests that require a content length but
* don't have one, and it is also used in the client when a response is
* received whose length cannot be determined accurately (therefore making
* it impossible to know when a transfer completes).
*/
public static final int STATUS_LENGTH_REQUIRED = 411;
/**
* This transfer was interrupted and cannot be resumed. This is the code for
* the OBEX error "Precondition Failed", and it is also used in situations
* where the client doesn't have an ETag at all.
*/
public static final int STATUS_PRECONDITION_FAILED = 412;
/**
* This transfer was canceled
*/
public static final int STATUS_CANCELED = 490;
/**
* This transfer has completed with an error. Warning: there will be other
* status values that indicate errors in the future. Use isStatusError() to
* capture the entire category.
*/
public static final int STATUS_UNKNOWN_ERROR = 491;
/**
* This transfer couldn't be completed because of a storage issue.
* Typically, that's because the file system is missing or full.
*/
public static final int STATUS_FILE_ERROR = 492;
/**
* This transfer couldn't be completed because of no sdcard.
*/
public static final int STATUS_ERROR_NO_SDCARD = 493;
/**
* This transfer couldn't be completed because of sdcard full.
*/
public static final int STATUS_ERROR_SDCARD_FULL = 494;
/**
* This transfer couldn't be completed because of an unspecified un-handled
* OBEX code.
*/
public static final int STATUS_UNHANDLED_OBEX_CODE = 495;
/**
* This transfer couldn't be completed because of an error receiving or
* processing data at the OBEX level.
*/
public static final int STATUS_OBEX_DATA_ERROR = 496;
/**
* This transfer couldn't be completed because of an error when establishing
* connection.
*/
public static final int STATUS_CONNECTION_ERROR = 497;Now put this code in your MainActivity.java class . This Main Activity class is using your Util class("BluetoothShare.java") to send the data(here I am sending image file) for printing on a specific device.
public class MainActivity extends Activity {
private static final String TAG = "BTSendFile";
private final int ACTIVITY_SELECT_IMAGE = 1;
private final BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter();
private Button select;
private Button sendDirectly;
private TextView textStatus;
private Uri uri;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textStatus = (TextView) findViewById(R.id.sendStatus);
select = (Button) findViewById(R.id.select);
sendDirectly = (Button) findViewById(R.id.sendDirectly);
select.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, ACTIVITY_SELECT_IMAGE);
}
});
sendDirectly.setEnabled(false);
sendDirectly.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (btAdapter.isEnabled()) {
Set<BluetoothDevice> devices = btAdapter.getBondedDevices();
final String btDeviceName = "PIXMA mini260";// here yo can put your device name
BluetoothDevice device = null;
for (BluetoothDevice itDevice : devices) {
if (btDeviceName.equals(itDevice.getName())) {
device = itDevice;
}
}
if (device != null) {
ContentValues values = new ContentValues();
// values.put(BluetoothShare.URI, Uri.fromFile(new
// File(uri.getPath())).toString());
values.put(BluetoothShare.URI, uri.toString());
values.put(BluetoothShare.MIMETYPE, "image/jpeg");
values.put(BluetoothShare.DESTINATION, device.getAddress());
values.put(BluetoothShare.DIRECTION, BluetoothShare.DIRECTION_OUTBOUND);
Long ts = System.currentTimeMillis();
values.put(BluetoothShare.TIMESTAMP, ts);
final Uri contentUri = getApplicationContext().getContentResolver().insert(BluetoothShare.CONTENT_URI, values);
Log.v(TAG, "Insert contentUri: " + contentUri + " to device: " + device.getName());
} else {
textStatus.setText("Bluetooth remote device not found");
}
} else {
textStatus.setText("Bluetooth not activated");
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case ACTIVITY_SELECT_IMAGE:
if (resultCode == RESULT_OK) {
uri = data.getData();
String filePath = uri.getPath();
textStatus.setText(filePath);
sendDirectly.setEnabled(true);
} else {
sendDirectly.setEnabled(false);
}
break;
default:
assert false;
}
}This is main_activity.xml file. Put following code
<?xml version="1.0" encoding="utf-8"?><TextView android:id="@+id/sendStatus" android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" android:padding="8dp" android:text="Please select file" > </TextView> <Button android:id="@+id/select" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Select file" > </Button> <Button android:id="@+id/sendDirectly" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Send file" > </Button> </LinearLayout>
By using above code you can print your data through bluetooth in android.
Note:- Printing in android is depends upon hardware support so some time this code will not work in some device.
Thanks Happy Coding!!!
