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我正在使用Android-Bluetooth-Printer。如果我在edittext
中鍵入英文文本,但它的工作正常,但問題是如果我從軟鍵盤選擇印地文語言,然後輸入一些印地文文本並嘗試打印,但它在紙張上什麼也不顯示。如何使用藍牙打印機顯示印地文或古吉拉特文字?
public class BlueToothPrinterApp extends Activity
{
EditText message;
Button printbtn;
byte FONT_TYPE;
private static BluetoothSocket btsocket;
private static OutputStream btoutputstream;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
message = (EditText)findViewById(R.id.message);
printbtn = (Button)findViewById(R.id.printButton);
printbtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
connect();
}
});
}
protected void connect() {
if(btsocket == null){
Intent BTIntent = new Intent(getApplicationContext(), BTDeviceList.class);
this.startActivityForResult(BTIntent, BTDeviceList.REQUEST_CONNECT_BT);
}
else{
OutputStream opstream = null;
try {
opstream = btsocket.getOutputStream();
} catch (IOException e) {
e.printStackTrace();
}
btoutputstream = opstream;
print_bt();
}
}
private void print_bt() {
try {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
btoutputstream = btsocket.getOutputStream();
byte[] printformat = { 0x1B, 0x21, FONT_TYPE };
btoutputstream.write(printformat);
String msg = message.getText().toString();
btoutputstream.write(msg.getBytes());
btoutputstream.write(0x0D);
btoutputstream.write(0x0D);
btoutputstream.write(0x0D);
btoutputstream.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
protected void onDestroy() {
super.onDestroy();
try {
if(btsocket!= null){
btoutputstream.close();
btsocket.close();
btsocket = null;
}
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try {
btsocket = BTDeviceList.getSocket();
if(btsocket != null){
print_bt();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
任何人都可以幫助我嗎?
你實現這一點。我也需要同樣的東西。 – Murali
@Murali是的,只是嘗試給定的答案 –
我試圖與圖像打印。但打印機陷入堆棧overflow.Can發佈您的工作代碼,如果有可能。 – Murali