CODEWITHSUNDEEP
javastringbluetooth
Killian
Killian

Reputation: 73

Assemble multiple String into one

I work on a Bluetooth application and I receive my data in several String packages. (I use speed Baud 9600)

example: 

02-19 09:44:59.516 12659-12659/com.example.appcopeeks I/RECEIVER: [1/1/0 
02-19 09:44:59.516 12659-12659/com.example.appcopeeks I/RECEIVER: 0:12:32]
02-19 09:44:59.526 12659-12659/com.example.appcopeeks I/RECEIVER:  Timesta
02-19 09:44:59.536 12659-12659/com.example.appcopeeks I/RECEIVER: mp=94668
02-19 09:44:59.546 12659-12659/com.example.appcopeeks I/RECEIVER: 5552 ID=
02-19 09:44:59.556 12659-12659/com.example.appcopeeks I/RECEIVER: 40 Value
02-19 09:44:59.566 12659-12659/com.example.appcopeeks I/RECEIVER: =2453

here is a video of what I get screenpresso.com/=8kakb I would like to put all this together in a string.

example:

[11/2/19 9:48:25] Timestamp=1549878505 ID=4 Value=2475

I tried this but it did not work.

 public class CapteurActivity extends AppCompatActivity {
 private StringBuilder dataFull = new StringBuilder();
 ...
  public void onReceive(Context context, Intent intent){
            switch (intent.getAction()){
                //writes the data received in the EditText
                case BGXpressService.BGX_DATA_RECEIVED: {
                    String stringReceived = intent.getStringExtra("data");

                    if ( stringReceived != null ) {
                        if ( stringReceived.startsWith("[")) {
                            getAssembleData(intent);
                        }
                    }

                    Log.d("Test DataFull: ",dataFull.toString());

        ...
  }
 }
}
     ...
public String getAssembleData(Intent intent){
    StringBuilder dataFull = new StringBuilder();
    String stringReceived = intent.getStringExtra("data");

    while (!stringReceived.contains("[")){
        dataFull.append(stringReceived);
    }
    return dataFull.toString();
 }
}

Thank you for taking the time to read.

Upvotes: 0

Views: 109

Answers (1)

Maximilian Voss
Maximilian Voss

Reputation: 71

You call toAssemble twice and you don't check for Null Pointer Exception. Here is a more simple approach which could fit your needs. lastStringReceived will have the last String assembly stored till a new String is received.

 public class CapteurActivity extends AppCompatActivity {
    static String lastStringReceived = "";
    StringBuffer buffer = new StringBuffer();
 ...
  public void onReceive(Context context, Intent intent){

            switch (intent.getAction()){
                //writes the data received in the EditText
                case BGXpressService.BGX_DATA_RECEIVED: {
                    String stringReceived = intent.getStringExtra("data");
                    if ( stringReceived != null ) {
                        if ( stringReceived.startsWith("[")) {
                            lastStringReceived = buffer.toString();
                            buffer = new StringBuffer();
                        }
                        buffer.append(stringReceived)
                    }

        ...
  }
 }
}

Upvotes: 1

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