fixed bug, app crashing after time, beacuse bluetooth buffer is full.

app/src/main/java/de/jonasled/led_table/controlActivity.java

@@ -7,6 +7,7 @@ import android.bluetooth.BluetoothDevice;
 import android.bluetooth.BluetoothSocket;
 import android.content.Intent;
 import android.os.Bundle;
+import android.os.Handler;
 import android.view.View;
 import android.widget.Button;
 import android.widget.Toast;
@@ -45,6 +46,8 @@ public class controlActivity extends AppCompatActivity {
     private Button fireButton;
     private Button confettiButton;
     private Button noiseButton;
+    private Runnable reciveHandlerTask;
+    private Handler reciveHandler;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -120,6 +123,17 @@ public class controlActivity extends AppCompatActivity {
             finish();
         }
 
+        reciveHandler = new Handler();
+        reciveHandlerTask = new Runnable() {
+            @Override
+            public void run() {
+                empfangen(); //delete every seccond the recive buffer, because if not the app will crash if the buffer is full
+                reciveHandler.postDelayed(reciveHandlerTask, 1000);
+            }
+        };
+
+        reciveHandlerTask.run();
+
         tetrisButton.setOnClickListener(new View.OnClickListener(){
 
             @Override
@@ -299,9 +313,7 @@ public class controlActivity extends AppCompatActivity {
                 // Message zusammensetzen:
                 for (int i = 0; i < laenge; i++)
                     msg += (char) buffer[i];
-
-                Toast.makeText(this, msg, Toast.LENGTH_LONG).show();
-
+                System.out.println("recived: " + msg);
             }
         } catch (Exception e) {
         }