Applied Android Studio code formatting to all java files

app/src/main/java/uk/org/openseizuredetector/AuthenticateActivity.java

@@ -66,8 +66,8 @@ public class AuthenticateActivity extends AppCompatActivity {
         logoutBtn.setOnClickListener(onLogout);
 
         // Components required only for osdapi backend
-        if (LogManager.USE_FIREBASE_BACKEND) { }
+        if (LogManager.USE_FIREBASE_BACKEND) {
-        else {
+        } else {
             mConnection = new SdServiceConnection(getApplicationContext());
 
             Button registerBtn = (Button) findViewById(R.id.RegisterBtn);
@@ -157,7 +157,6 @@ public class AuthenticateActivity extends AppCompatActivity {
     }
 
 
-
     // Called after the Firebase Auth UI has completed
     private ActivityResultLauncher<Intent> signInLauncher = registerForActivityResult(
             new FirebaseAuthUIActivityResultContract(),

app/src/main/java/uk/org/openseizuredetector/CircBuf.java

@@ -68,6 +68,7 @@ public class CircBuf {
 
     /**
      * Returns a double array of buffer items in order of their insertion time
+     *
      * @return double[] of buffer items
      */
     public double[] getVals() {

app/src/main/java/uk/org/openseizuredetector/EditEventActivity.java

@@ -3,7 +3,9 @@ package uk.org.openseizuredetector;
 import android.content.Context;
 import android.os.Bundle;
 import android.os.Handler;
+
 import androidx.appcompat.app.AppCompatActivity;
+
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
@@ -269,7 +271,6 @@ public class EditEventActivity extends AppCompatActivity {
         }
 
 
-
     }  // updateUi()
 
     View.OnClickListener onCancel =

app/src/main/java/uk/org/openseizuredetector/FragmentDataSharing.java

@@ -9,6 +9,7 @@ import android.widget.TextView;
 
 public class FragmentDataSharing extends FragmentOsdBaseClass {
     String TAG = "FragmentDataSharing";
+
     public FragmentDataSharing() {
         // Required empty public constructor
     }

app/src/main/java/uk/org/openseizuredetector/FragmentHrAlg.java

@@ -99,6 +99,7 @@ public class FragmentHrAlg extends FragmentOsdBaseClass {
         yAxis2.setDrawGridLines(false);
         yAxis2.setEnabled(false);
     }
+
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {

app/src/main/java/uk/org/openseizuredetector/FragmentMlAlg.java

@@ -9,6 +9,7 @@ import android.widget.TextView;
 
 public class FragmentMlAlg extends FragmentOsdBaseClass {
     String TAG = "FragmentMlAlg";
+
     public FragmentMlAlg() {
         // Required empty public constructor
     }

app/src/main/java/uk/org/openseizuredetector/FragmentOsdAlg.java

@@ -23,6 +23,7 @@ import java.util.ArrayList;
 
 public class FragmentOsdAlg extends FragmentOsdBaseClass {
     String TAG = "FragmentOsdAlg";
+
     public FragmentOsdAlg() {
         // Required empty public constructor
     }

app/src/main/java/uk/org/openseizuredetector/FragmentOsdBaseClass.java

@@ -34,7 +34,6 @@ public class FragmentOsdBaseClass extends Fragment {
     protected int alarmTextColour = Color.BLACK;
 
 
-
     public FragmentOsdBaseClass() {
         // Required empty public constructor
     }

app/src/main/java/uk/org/openseizuredetector/FragmentSystem.java

@@ -13,6 +13,7 @@ import androidx.appcompat.widget.LinearLayoutCompat;
 
 public class FragmentSystem extends FragmentOsdBaseClass {
     String TAG = "FragmentSystem";
+
     public FragmentSystem() {
         // Required empty public constructor
     }
@@ -51,7 +52,6 @@ public class FragmentSystem extends FragmentOsdBaseClass {
     }
 
 
-
     @Override
     protected void updateUi() {
         //Log.d(TAG,"updateUi()");

app/src/main/java/uk/org/openseizuredetector/FragmentWebServer.java

@@ -9,6 +9,7 @@ import android.widget.TextView;
 
 public class FragmentWebServer extends FragmentOsdBaseClass {
     String TAG = "FragmentWebServer";
+
     public FragmentWebServer() {
         // Required empty public constructor
     }

app/src/main/java/uk/org/openseizuredetector/GattAttributes.java

@@ -1,5 +1,6 @@
 package uk.org.openseizuredetector;
 // Defines the servies and characteristics we need to subscribe to.
+
 import java.util.HashMap;
 
 public class GattAttributes {

app/src/main/java/uk/org/openseizuredetector/LocationFinder.java

@@ -2,6 +2,7 @@ package uk.org.openseizuredetector;
 
 
 /**
+ *
  */
 
 import android.content.Context;
@@ -21,8 +22,7 @@ interface SdLocationReceiver {
 }
 
 
-public class LocationFinder implements LocationListener
+public class LocationFinder implements LocationListener {
-{
     SdLocationReceiver mSdLocationReceiver = null;
     Location mLastLocation = null;
     OsdUtil mUtil;
@@ -56,7 +56,6 @@ public class LocationFinder implements LocationListener
     }
 
 
-
     public Location getLastLocation() {
         return mLastLocation;
     }

app/src/main/java/uk/org/openseizuredetector/LogManager.java

@@ -510,8 +510,6 @@ public class LogManager {
     }
 
 
-
-
     /**
      * Return an array list of objects representing the events in the database by calling the specified callback function.
      *

app/src/main/java/uk/org/openseizuredetector/MainActivity2.java

@@ -45,6 +45,7 @@ public class MainActivity2 extends AppCompatActivity {
     private OsdUtil mUtil;
     private SdServiceConnection mConnection;
     final Handler serverStatusHandler = new Handler();
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -127,8 +128,6 @@ public class MainActivity2 extends AppCompatActivity {
     }
 
 
-
-
     @Override
     protected void onPause() {
         super.onPause();
@@ -151,7 +150,6 @@ public class MainActivity2 extends AppCompatActivity {
     }
 
 
-
     @Override
     public void onBackPressed() {
         if (Objects.isNull(mFragmentPager) || mFragmentPager.getCurrentItem() == 0) {
@@ -278,14 +276,13 @@ public class MainActivity2 extends AppCompatActivity {
     }
 
 
-
-
     /**
      * A simple pager adapter that represents 5 ScreenSlidePageFragment objects, in
      * sequence.
      */
     private class ScreenSlideFragmentPagerAdapter extends FragmentStateAdapter {
         private String TAG = "ScreenSlideFragmentPagerAdapter";
+
         public ScreenSlideFragmentPagerAdapter(FragmentActivity fa) {
             super(fa);
         }
@@ -329,7 +326,6 @@ public class MainActivity2 extends AppCompatActivity {
     }
 
 
-
     private void showAbout() {
         mUtil.writeToSysLogFile("MainActivity.showAbout()");
         View aboutView = getLayoutInflater().inflate(R.layout.about_layout, null, false);

app/src/main/java/uk/org/openseizuredetector/MlModelManager.java

@@ -55,7 +55,6 @@ public class MlModelManager {
     }
 
 
-
     /**
      * Retrieve the file containing the list of available ML models from the server.
      * Calls the specified callback function, passing a JSONObject as a parameter when the data has been received and parsed.

app/src/main/java/uk/org/openseizuredetector/OsdUtil.java

@@ -328,12 +328,12 @@ public class OsdUtil {
     public void writeToSysLogFile(String msgStr, String logType) {
         writeLogEntryToLocalDb(msgStr, logType);
     }
+
     public void writeToSysLogFile(String msgStr) {
         writeLogEntryToLocalDb(msgStr, "v");
     }
 
 
-
     /**
      * Write a message to the alarm log file, provided mLogAlarms is true.
      *
@@ -404,8 +404,7 @@ public class OsdUtil {
     public File[] getDataFilesList() {
         File[] files = getDataStorageDir().listFiles();
         Log.d("Files", "Size: " + files.length);
-        for (int i = 0; i < files.length; i++)
+        for (int i = 0; i < files.length; i++) {
-        {
             Log.d("Files", "FileName:" + files[i].getName());
         }
         return (files);
@@ -459,6 +458,7 @@ public class OsdUtil {
      * It first attempts to parse it as a long integer, in which case it is assumed to
      * be a unix timestamp.
      * If that fails it attempts to parse it as yyyy-MM-dd'T'HH:mm:ss'Z' format.
+     *
      * @param dateStr String reprenting a date
      * @return Date object or null if parsing fails.
      */
@@ -612,7 +612,6 @@ public class OsdUtil {
     /**
      * Executes the sqlite query (=SELECT statement)
      * Use as new SelectQueryTask(xxx,xxx,xx,xxxx).execute()
-     *
      */
     static private class SelectQueryTask extends AsyncTask<Void, Void, Cursor> {
         // Based on https://stackoverflow.com/a/21120199/2104584
@@ -669,7 +668,6 @@ public class OsdUtil {
     }
 
 
-
     /**
      * pruneSysLogDb() removes data that is older than 7 days
      */

app/src/main/java/uk/org/openseizuredetector/RemoteDbActivity.java

@@ -9,7 +9,9 @@ import android.os.Bundle;
 import android.os.CountDownTimer;
 import android.os.Handler;
 import android.preference.PreferenceManager;
+
 import androidx.appcompat.app.AppCompatActivity;
+
 import android.util.Log;
 import android.view.View;
 import android.webkit.WebSettings;
@@ -137,7 +139,6 @@ public class RemoteDbActivity extends AppCompatActivity {
         //tv.setText(String.format("%d",datapointsCount));
 
 
-
         // Remote Database Information
         tv = (TextView) findViewById(R.id.authStatusTv);
         btn = (Button) findViewById(R.id.auth_button);

app/src/main/java/uk/org/openseizuredetector/ReportSeizureActivity.java

@@ -209,7 +209,6 @@ public class ReportSeizureActivity extends AppCompatActivity {
     }
 
 
-
     private void updateUi() {
         //Log.v(TAG,"updateUi()");
         TextView tv;

app/src/main/java/uk/org/openseizuredetector/SdAlgHr.java

@@ -99,7 +99,6 @@ public class SdAlgHr {
     }
 
 
-
     private boolean checkSimpleHr(double hrVal) {
         /**
          * Check heart rate value against simple thresholds
@@ -116,6 +115,7 @@ public class SdAlgHr {
 
     /**
      * Returns the average heart rate being used by the Adaptive heart rate algorithm
+     *
      * @return Average Heart reate in bpm.
      */
     public double getAdaptiveHrAverage() {
@@ -130,10 +130,13 @@ public class SdAlgHr {
         return mAdaptiveHrBuff;
     }
 
-    public CircBuf getHrHistBuff() { return mHrHist; }
+    public CircBuf getHrHistBuff() {
+        return mHrHist;
+    }
 
     /**
      * Returns the average heart rate being used by the Average heart rate algorithm
+     *
      * @return Average Heart rate in bpm.
      */
     public double getAverageHrAverage() {
@@ -177,7 +180,6 @@ public class SdAlgHr {
     }
 
 
-
     public ArrayList<Boolean> checkHr(double hrVal) {
         /**
          * Checks the current Heart Rate reading hrVal against the

app/src/main/java/uk/org/openseizuredetector/SdAlgNn.java

@@ -99,6 +99,7 @@ public class SdAlgNn {
      * getPseizureFmt1 - calculate probability of sdData representing seizure-like movement
      * using a model with input format #1, which is a simple vector of 125 accelerometer vector
      * magnitude readings.
+     *
      * @param sdData - seizure detector data as input to the model
      * @return probability of data representing seizure-like movement.
      */

app/src/main/java/uk/org/openseizuredetector/SdDataSource.java

@@ -154,7 +154,6 @@ public abstract class SdDataSource {
         }
 
 
-
         // Start timer to check status of watch regularly.
         mDataStatusTime = new Time(Time.getCurrentTimezone());
         // use a timer to check the status of the pebble app on the same frequency
@@ -825,7 +824,8 @@ public abstract class SdDataSource {
 
             // Check we have seen a fidget within the required period, or else assume a fault because watch is not being worn
             if (mFidgetDetectorEnabled) {
-                if (mLastFidget == null) mLastFidget = tnow;   // Initialise last fidget time on startup.
+                if (mLastFidget == null)
+                    mLastFidget = tnow;   // Initialise last fidget time on startup.
 
                 double accStd = calcRawDataStd(mSdData);
                 if (accStd > mFidgetThreshold) {

app/src/main/java/uk/org/openseizuredetector/SdDataSourceAw.java

@@ -40,11 +40,11 @@ import java.nio.IntBuffer;
 import java.util.Timer;
 import java.util.TimerTask;
 import java.util.UUID;
+
 import com.google.android.gms.wearable.MessageEvent;
 import com.google.android.gms.wearable.WearableListenerService;
 
 
-
 /**
  * Abstract class for a seizure detector data source.  Subclasses include a pebble smart watch data source and a
  * network data source.
@@ -744,9 +744,6 @@ public class SdDataSourceAw extends SdDataSource {
     }
 
 
-
-
-
 }
 
 

app/src/main/java/uk/org/openseizuredetector/SdDataSourceBLE.java

@@ -368,6 +368,7 @@ public class SdDataSourceBLE extends SdDataSource {
                 }, 100);
             }
         }
+
         private boolean permissionsOK() {
             if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
                 // TODO: Consider calling
@@ -413,8 +414,7 @@ public class SdDataSourceBLE extends SdDataSource {
                     mSdData.mHR = (double) heartRate;
                 }
                 Log.d(TAG, String.format("onDataReceived(): CHAR_HEART_RATE_MEASUREMENT: %d", heartRate));
-            }
+            } else if (characteristic.getUuid().toString().equals(CHAR_OSD_ACC_DATA)
-            else if (characteristic.getUuid().toString().equals(CHAR_OSD_ACC_DATA)
                     || characteristic.getUuid().toString().equals(CHAR_INFINITIME_ACC_DATA)) {
                 //Log.v(TAG,"Received OSD ACC DATA"+characteristic.getValue());
                 byte[] rawDataBytes = characteristic.getValue();
@@ -473,36 +473,30 @@ public class SdDataSourceBLE extends SdDataSource {
                         nRawData = 0;
                     }
                 }
-            }
+            } else if (characteristic.getUuid().toString().equals(CHAR_OSD_BATT_DATA)) {
-            else if (characteristic.getUuid().toString().equals(CHAR_OSD_BATT_DATA)) {
                 byte batteryPc = characteristic.getValue()[0];
                 mSdData.batteryPc = batteryPc;
                 Log.v(TAG, "onDataReceived(): CHAR_OSD_BATT_DATA: " + String.format("%d", batteryPc));
                 mSdData.haveSettings = true;
-            }
+            } else if (characteristic.getUuid().toString().equals(CHAR_BATT_DATA)) {
-            else if (characteristic.getUuid().toString().equals(CHAR_BATT_DATA)) {
                 byte batteryPc = characteristic.getValue()[0];
                 mSdData.batteryPc = batteryPc;
                 Log.v(TAG, "onDataReceived(): CHAR_BATT_DATA: " + String.format("%d", batteryPc));
                 mSdData.haveSettings = true;
-            }
+            } else if (characteristic.getUuid().toString().equals(CHAR_OSD_WATCH_ID)) {
-            else if (characteristic.getUuid().toString().equals(CHAR_OSD_WATCH_ID)) {
                 byte[] rawDataBytes = characteristic.getValue();
                 String watchId = new String(rawDataBytes, StandardCharsets.UTF_8);
                 Log.v(TAG, "Received Watch ID: " + watchId);
                 mSdData.watchSdName = watchId;
-            }
+            } else if (characteristic.getUuid().toString().equals(CHAR_OSD_WATCH_FW)) {
-            else if (characteristic.getUuid().toString().equals(CHAR_OSD_WATCH_FW)) {
                 byte[] rawDataBytes = characteristic.getValue();
                 String watchFwVer = new String(rawDataBytes, StandardCharsets.UTF_8);
                 Log.v(TAG, "Received Watch Firmware Version: " + watchFwVer);
                 mSdData.watchSdVersion = watchFwVer;
-            }
+            } else if (characteristic.getUuid().toString().equals(CHAR_OSD_ACC_FMT)) {
-            else if (characteristic.getUuid().toString().equals(CHAR_OSD_ACC_FMT)) {
                 mAccFmt = characteristic.getValue()[0];
                 Log.v(TAG, "Received Acceleration format code: " + mAccFmt);
-            }
+            } else {
-            else {
                 Log.v(TAG, "Unrecognised Characteristic Updated " +
                         characteristic.getUuid().toString());
             }
@@ -534,6 +528,7 @@ public class SdDataSourceBLE extends SdDataSource {
             }
             return (retArr);
         }
+
         @Override
         public void onCharacteristicRead(BluetoothGatt gatt,
                                          BluetoothGattCharacteristic characteristic,

app/src/main/java/uk/org/openseizuredetector/SdDataSourceNetwork.java

@@ -38,7 +38,8 @@ public class SdDataSourceNetwork extends SdDataSource {
         mName = "Network";
     }
 
-    @Override public void start() {
+    @Override
+    public void start() {
         // Update preferences.
         Log.v(TAG, "start(): calling updatePrefs()");
         mUtil.writeToSysLogFile("SdDataSourceNetwork().start()");
@@ -63,7 +64,8 @@ public class SdDataSourceNetwork extends SdDataSource {
 
     }
 
-    @Override public void stop() {
+    @Override
+    public void stop() {
         mUtil.writeToSysLogFile("SdDataSourceNetwork().stop()");
         // Stop the data update timer
         if (mDataUpdateTimer != null) {
@@ -76,7 +78,6 @@ public class SdDataSourceNetwork extends SdDataSource {
     }
 
 
-
     /**
      * updatePrefs() - update basic settings from the SharedPreferences
      * - defined in res/xml/prefs.xml
@@ -117,6 +118,7 @@ public class SdDataSourceNetwork extends SdDataSource {
 
     private class DownloadSdDataTask extends AsyncTask<String, Void, SdData> {
         private SdData sdData;
+
         @Override
         protected SdData doInBackground(String... urls) {
             // params comes from the execute() call: params[0] is the url.
@@ -154,6 +156,7 @@ public class SdDataSourceNetwork extends SdDataSource {
                 return sdData;
             }
         }
+
         // onPostExecute displays the results of the AsyncTask.
         @Override
         protected void onPostExecute(SdData sdData) {
@@ -187,6 +190,7 @@ public class SdDataSourceNetwork extends SdDataSource {
             }
             return "Done";
         }
+
         // onPostExecute displays the results of the AsyncTask.
         @Override
         protected void onPostExecute(String s) {
@@ -195,7 +199,6 @@ public class SdDataSourceNetwork extends SdDataSource {
     }
 
 
-
     // Given a URL, establishes an HttpUrlConnection and retrieves
     // the web page content as a InputStream, which it returns as
     // a string.
@@ -241,6 +244,4 @@ public class SdDataSourceNetwork extends SdDataSource {
     }
 
 
-
-
 }

app/src/main/java/uk/org/openseizuredetector/SdDataSourcePebble.java

@@ -45,7 +45,6 @@ import java.util.TimerTask;
 import java.util.UUID;
 
 
-
 /**
  * Abstract class for a seizure detector data source.  Subclasses include a pebble smart watch data source and a
  * network data source.
@@ -774,7 +773,6 @@ public class SdDataSourcePebble extends SdDataSource {
     }
 
 
-
 }
 
 

app/src/main/java/uk/org/openseizuredetector/SdDataSourcePhone.java

@@ -95,9 +95,6 @@ public class SdDataSourcePhone extends SdDataSource implements SensorEventListen
     }
 
 
-
-
-
     @Override
     public void onSensorChanged(SensorEvent event) {
         if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
@@ -183,8 +180,6 @@ public class SdDataSourcePhone extends SdDataSource implements SensorEventListen
     }
 
 
-
-
 }
 
 

app/src/main/java/uk/org/openseizuredetector/SdServer.java

@@ -316,7 +316,6 @@ public class SdServer extends Service implements SdDataReceiver {
         mSdDataSource.start();
 
 
-
         // Record last time we sent an SMS so we can limit rate of SMS
         // sending to one per minute.   We set it to one minute ago (60000 milliseconds)
         mSMSTime = new Time(Time.getCurrentTimezone());
@@ -1373,7 +1372,6 @@ public class SdServer extends Service implements SdDataReceiver {
 
         /**
          * onSdLocationReceived - called with the best estimate location after mLocationReceiver times out.
-         *
          */
         private void sendSMS(String phoneNo, String msgStr) {
             Log.i(TAG, "sendSMS() - Sending to " + phoneNo);
@@ -1781,6 +1779,7 @@ public class SdServer extends Service implements SdDataReceiver {
 
     /**
      * isNotificationShown - returns true if the specified notificationID is shown, otherwise returns false.
+     *
      * @param notificationId - Notification ID to check
      * @return true if the specified notification is displayed, otherwise false.
      */

app/src/main/java/uk/org/openseizuredetector/SdServiceConnection.java

@@ -31,7 +31,6 @@ import android.os.IBinder;
 import android.util.Log;
 
 
-
 /**
  * Defines callbacks for service binding, passed to bindService()
  */
@@ -68,6 +67,7 @@ public class SdServiceConnection implements ServiceConnection {
 
     /**
      * Check if the service has received seizure detector data.
+     *
      * @return true if data has been received.
      */
     public boolean hasSdData() {
@@ -81,6 +81,7 @@ public class SdServiceConnection implements ServiceConnection {
 
     /**
      * Check if the service has received seizure detector settings.
+     *
      * @return true if settings have been received.
      */
     public boolean hasSdSettings() {
@@ -96,6 +97,7 @@ public class SdServiceConnection implements ServiceConnection {
 
     /**
      * Check if the pebble watch is connected to the server device via bluetooth.
+     *
      * @return true if watch connected.
      */
     public boolean watchConnected() {
@@ -111,6 +113,7 @@ public class SdServiceConnection implements ServiceConnection {
 
     /**
      * Check if the openseizuredetector pebble watch app is running..
+     *
      * @return true if watch app running.
      */
     public boolean pebbleAppRunning() {

app/src/main/java/uk/org/openseizuredetector/StartupActivity.java

@@ -113,8 +113,6 @@ public class StartupActivity extends AppCompatActivity {
     };
 
 
-
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

app/src/main/java/uk/org/openseizuredetector/WebApiConnection.java

@@ -139,6 +139,7 @@ public abstract class WebApiConnection {
 
     /**
      * Mark all of the events with IDs contained in eventList as the specified type and subtype.
+     *
      * @param eventList  list of String IDs of the events to mark as unknown.
      * @param typeStr
      * @param subTypeStr
@@ -240,6 +241,7 @@ public abstract class WebApiConnection {
         markUnverifiedEventsAsTypeSubtype("Unknown", "");
         return true;
     }
+
     public boolean markUnverifiedEventsAsFalseAlarm() {
         markUnverifiedEventsAsTypeSubtype("False Alarm", "");
         return true;

app/src/main/java/uk/org/openseizuredetector/WebApiConnection_osdapi.java

@@ -110,8 +110,6 @@ public class WebApiConnection_osdapi extends WebApiConnection {
     }
 
 
-
-
     public boolean isLoggedIn() {
         String authToken = getStoredToken();
         Log.v(TAG, "isLoggedIn(): token=" + authToken);
@@ -517,6 +515,7 @@ public class WebApiConnection_osdapi extends WebApiConnection {
 
     /**
      * Retieve the user profile of the authenticated user from the server, and return it to the callback function.
+     *
      * @param callback - function to be called with a JSONObject as a parameter that contains the user profile data.
      * @return true if request sent successfully, or else false.
      */
@@ -572,8 +571,6 @@ public class WebApiConnection_osdapi extends WebApiConnection {
     }
 
 
-
-
     /**
      * Retrieve the file containing the standard event types from the server.
      * Calls the specified callback function, passing a JSONObject as a parameter when the data has been received and parsed.
@@ -680,11 +677,10 @@ public class WebApiConnection_osdapi extends WebApiConnection {
     }
 
 
-
-
     /**
      * Retrieve a trivial file from the server to check we have a good server connection.
      * sets mServerConnectionOk.
+     *
      * @return true if request sent successfully or else false.
      */
     public boolean checkServerConnection() {