Correct using bytearray.

app/src/main/java/com/flywithu/carnav/MainActivity.java

@@ -26,7 +26,7 @@ public class MainActivity extends AppCompatActivity {
     public static final String TAG="carnav";
     static final String ACTION_USB_PERMISSION = "com.flywithu.carnav.USB_PERMISSION";
     private BroadcastReceiver usbReceiver = null;
-    private static UsbSerialPort sPort = null;
+
     private void goService()
     {
 
@@ -109,20 +109,21 @@ public class MainActivity extends AppCompatActivity {
                         Toast.makeText(getApplicationContext(), "Unknown error", Toast.LENGTH_LONG).show();
                     } else {
 
-
+                        UsbSerialPort sPort = null;
                         sPort = driver.getPorts().get(0);
                         sPort.open(connection);
+                        Toast.makeText(getApplicationContext(),"Serial Count:"+String.valueOf(driver.getPorts().size()),Toast.LENGTH_LONG).show();
                         sPort.close();
                         sPort = null;
 
-                        Toast.makeText(getApplicationContext(),"Serial Count:"+String.valueOf(driver.getPorts().size()),Toast.LENGTH_LONG).show();
+
                         goService();
                     }
                 }
             }
             catch(Exception e)
             {
-               Toast.makeText(getApplicationContext(),e.toString(),Toast.LENGTH_LONG).show();
+                Toast.makeText(getApplicationContext(),e.toString(),Toast.LENGTH_LONG).show();
             }
 
 

app/src/main/java/com/flywithu/carnav/RealService.java

@@ -54,10 +54,10 @@ public class RealService extends Service {
     }
 
     private synchronized  void sendSerial(String str,Charset enc) {
-        byte t1[] = new byte[]{0x55, 0x34, 0x50, 0x4C, 0x30, 0x33, 0x7C, 0x31, 0x2C, 0x31, 0x7C, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30};
+//        byte t1[] = new byte[]{0x55, 0x34, 0x50, 0x4C, 0x30, 0x33, 0x7C, 0x31, 0x2C, 0x31, 0x7C, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30};
-        byte t2[] = new byte[]{0x55, 0x34, 0x50, 0x4C, 0x31, 0x33, 0x7C, 0x41, (byte) 0xec, (byte) 0xa7, (byte) 0x80, (byte) 0xec, (byte) 0x96, (byte) 0xb4, (byte) 0xeb, (byte) 0xb0, (byte) 0x98, 0x5a, 0x7c};
+//        byte t2[] = new byte[]{0x55, 0x34, 0x50, 0x4C, 0x31, 0x33, 0x7C, 0x41, (byte) 0xec, (byte) 0xa7, (byte) 0x80, (byte) 0xec, (byte) 0x96, (byte) 0xb4, (byte) 0xeb, (byte) 0xb0, (byte) 0x98, 0x5a, 0x7c};
-        byte t3[] = new byte[]{0x55, 0x34, 0x50, 0x4C, 0x32, 0x33, 0x7C, (byte) 0xfe, (byte) 0xff, 0x00, 0x41, (byte) 0xc9, (byte) 0xc0, (byte) 0xc5, (byte) 0xb4, (byte) 0xbc, 0x18, 0x00, 0x5a, 0x7c};
+//        byte t3[] = new byte[]{0x55, 0x34, 0x50, 0x4C, 0x32, 0x33, 0x7C, (byte) 0xfe, (byte) 0xff, 0x00, 0x41, (byte) 0xc9, (byte) 0xc0, (byte) 0xc5, (byte) 0xb4, (byte) 0xbc, 0x18, 0x00, 0x5a, 0x7c};
-        byte t4[] = new byte[]{0x55, 0x34, 0x50, 0x4C, 0x33, 0x33, 0x7C, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, (byte) 0xc9, (byte) 0xc0, 0x00, 0x00, (byte) 0xc5, (byte) 0xb4, 0x00, 0x00, (byte) 0xbc, 0x18, 0x00, 0x00, 0x00, 0x5a, 0x7c};
+//        byte t4[] = new byte[]{0x55, 0x34, 0x50, 0x4C, 0x33, 0x33, 0x7C, 0x00, 0x00, 0x00, 0x41, 0x00, 0x00, (byte) 0xc9, (byte) 0xc0, 0x00, 0x00, (byte) 0xc5, (byte) 0xb4, 0x00, 0x00, (byte) 0xbc, 0x18, 0x00, 0x00, 0x00, 0x5a, 0x7c};
         /*
         41eca780ec96b4ebb0985a
 feff0041c9c0c5b4bc18005a
@@ -67,8 +67,15 @@ feff0041c9c0c5b4bc18005a
             try {
 
 
-                sPort.write(getStringToByte(str,enc), 3000);
+             sPort.write(getStringToByte(str,enc), 3000);
-                sPort.write(new byte[]{0xd}, 3000);
+      //          Toast.makeText(getApplicationContext(),String.valueOf(result),Toast.LENGTH_SHORT).show();
+              sPort.write(new byte[]{0xd}, 3000);
+       //         Toast.makeText(getApplicationContext(),String.valueOf(result2),Toast.LENGTH_SHORT).show();
+                Log.d("TAG",str);
+//                showToast(getApplication(), "SEND:"+str);
+
+
+
 //                sPort.write(t1, 3000);
 //                sPort.write(new byte[]{0xd}, 3000);
 //
@@ -81,17 +88,22 @@ feff0041c9c0c5b4bc18005a
 //                sPort.write(t4, 3000);
 //                sPort.write(new byte[]{0xd}, 3000);
             } catch (Exception e) {
-
+                showToast(getApplication(),"Error:"+e.toString());
             }
 
         }
+        else
+        {
+            showToast(getApplication(),"SERIAL NULL");
+        }
+
 
     }
 
 
     protected byte[] getStringToByte(String str,Charset enc)
     {
-        ByteBuffer buf = ByteBuffer.allocate(100);;
+        ByteBuffer buf = ByteBuffer.allocate(300);;
         /*
                 sendSerial("U4PL13|soar|");
         sendSerial("U4PL23|헤어지자 (Prod. 정키)|");
@@ -106,8 +118,10 @@ feff0041c9c0c5b4bc18005a
             buf.put(arrStr[0].getBytes(Charset.forName("UTF-8")));
             buf.put(new byte[]{0x7c});
             buf.put(arrStr[1].getBytes(enc));
+      //      Log.d("TAG",     String.valueOf( buf.position()));
             buf.put(new byte[]{0x7c});
             //       System.out.println(new String(buf.array()));
+         //   Log.d("TAG",     String.valueOf( buf.position()));
 
         }
         else
@@ -116,10 +130,11 @@ feff0041c9c0c5b4bc18005a
             buf.put(str.getBytes(Charset.forName("UTF-8")));
         }
 
+        byte[] bytes = new byte[buf.position()];
+        buf.get(bytes,0,buf.position());
 
 
-
+        return bytes;
-        return buf.array();
     }
 
 
@@ -147,6 +162,7 @@ feff0041c9c0c5b4bc18005a
         UsbDeviceConnection connection = null;
         try {
             driver = availableDrivers.get(0);
+
             connection = manager.openDevice(driver.getDevice());
             if (connection == null) {
                 showToast(getApplication(), "No connection");
@@ -154,8 +170,11 @@ feff0041c9c0c5b4bc18005a
 
             }
             sPort = driver.getPorts().get(0);
+
+         //   showToast(getApplication(),            driver.getDevice().getProductName());
         } catch (Exception e) {
             showToast(getApplication(), e.toString());
+            return START_NOT_STICKY;
         }
 
         try {
@@ -172,6 +191,7 @@ feff0041c9c0c5b4bc18005a
                 // Ignore.
             }
             sPort = null;
+            return START_NOT_STICKY;
         }
         //set the time
         //TMST001801140907
@@ -199,31 +219,9 @@ feff0041c9c0c5b4bc18005a
 
         //U4PL03|1,1|0001010000000 U4PL13|soar| U4PL23|헤어지자 (Prod. 정키)| U4PL33|휘인 (Whee In)|
 
-        showToast(getApplication(), currentTime);
 
-//                try {
+
-//                    sPort.write("zxcv".getBytes(), 50);
+
-//                }
-//                catch(Exception e)
-//                {
-//
-//                }
-//                SimpleDateFormat sdf = new SimpleDateFormat("aa hh:mm");
-//                boolean run = true;
-//                while (run) {
-//                    try {
-//                        Thread.sleep(1000 * 60 * 1); // 1 minute
-//                        Date date = new Date();
-//                        //showToast(getApplication(), sdf.format(date));
-//                        sendNotification(sdf.format(date));
-//                    } catch (InterruptedException e) {
-//                        run = false;
-//                        e.printStackTrace();
-//                    }
-//                }
-//            }
-//        });
-//        mainThread.start();
         IntentFilter iF = new IntentFilter();
         iF.addAction("com.android.music.metachanged");
 
@@ -255,13 +253,21 @@ feff0041c9c0c5b4bc18005a
                 {
                     try
                     {
-                        Thread.sleep(1000);
+                        Thread.sleep(5000);
                         SimpleDateFormat format1 = new SimpleDateFormat("00yyMMddHHmm");
                         //   String f = format1.format(System.currentTimeMillis());
                         String currentInfo = format1.format(new Date());
                         String currentTime = String.format("TMST%s", currentInfo);
                         sendSerial(currentTime);
-                        showToast(getApplication(), currentTime);
+
+                        sendSerial("U4EN00");
+                        sendSerial("*R|R1R2R3D1D2A1A3U4|");
+                        sendSerial("U4PL03|5,3|0001010000000");
+                        sendSerial("U4PL13|8소아|",Charset.forName("UTF-8"));
+                        sendSerial("U4PL23|16헤어지자 (Prod. 정키)|", Charset.forName("UTF-16"));
+                        sendSerial("U4PL33|32휘인 (Whee In)|",Charset.forName("UTF-32"));
+
+
                     }
                     catch(InterruptedException e)
                     {
@@ -275,6 +281,49 @@ feff0041c9c0c5b4bc18005a
         }).start();
 
 
+//        new Thread(new Runnable() {
+//            @Override
+//            public void run()
+//            {
+//
+//                boolean myRun = true;
+//                showToast(getApplication(), "READ start");
+//                while (myRun)
+//                {
+//                    try
+//                    {
+//                        byte[] mArray = new byte[100];
+//                        int len = sPort.read(mArray,1000);
+//                        if(len >0)
+//                        {
+//                            String result = new String (mArray,0,len,Charset.defaultCharset());
+//                            showToast(getApplication(), "READ:"+result);
+//                        }
+//                        else
+//                        {
+//                            showToast(getApplication(), "READ FAIL");
+//                            Log.d("FAIL","FAIL");
+//                        }
+//
+//
+//                    }
+//                    catch(Exception e)
+//                    {
+//                        myRun = false;
+//
+//                    }
+//                }
+//
+//            }
+//
+//        }).start();
+
+
+
+
+
+
+
         return START_NOT_STICKY;
     }
 
@@ -285,12 +334,13 @@ feff0041c9c0c5b4bc18005a
             sPort.close();
             sPort = null;
         } catch (Exception e) {
-
+            showToast(getApplication(),"stop Error");
         }
         serviceIntent = null;
         setAlarmTimer();
         Thread.currentThread().interrupt();
         unregisterReceiver(mReceiver);
+        showToast(getApplication(),"stop Service");
 //        if (mainThread != null) {
 //            mainThread.interrupt();
 //            mainThread = null;
@@ -317,7 +367,7 @@ feff0041c9c0c5b4bc18005a
         h.post(new Runnable() {
             @Override
             public void run() {
-                Toast.makeText(application, msg, Toast.LENGTH_LONG).show();
+                Toast.makeText(application, msg, Toast.LENGTH_SHORT).show();
             }
         });
     }

app/src/main/java/com/flywithu/carnav/RebootReceiver.java

@@ -4,10 +4,12 @@ import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Build;
+import android.widget.Toast;
 
 public class RebootReceiver extends BroadcastReceiver {
     @Override
     public void onReceive(Context context, Intent intent) {
+
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             Intent in = new Intent(context, RestartService.class);
             context.startForegroundService(in);