#14 Show GPS Status icon in Recorder

app/src/main/java/de/tadris/fitness/activity/RecordWorkoutActivity.java

@@ -57,7 +57,7 @@ import de.tadris.fitness.map.tilesource.TileSources;
 import de.tadris.fitness.util.ThemeManager;
 import de.tadris.fitness.util.unit.UnitUtils;
 
-public class RecordWorkoutActivity extends FitoTrackActivity implements LocationListener.LocationChangeListener {
+public class RecordWorkoutActivity extends FitoTrackActivity implements LocationListener.LocationChangeListener, WorkoutRecorder.GpsStateChangedListener {
 
     public static String ACTIVITY= Workout.WORKOUT_TYPE_RUNNING;
 
@@ -88,7 +88,7 @@ public class RecordWorkoutActivity extends FitoTrackActivity implements Location
 
         checkPermissions();
 
-        recorder= new WorkoutRecorder(this, ACTIVITY);
+        recorder= new WorkoutRecorder(this, ACTIVITY, this);
         recorder.start();
 
         infoViews[0]= new InfoViewHolder(findViewById(R.id.recordInfo1Title), findViewById(R.id.recordInfo1Value));
@@ -96,6 +96,7 @@ public class RecordWorkoutActivity extends FitoTrackActivity implements Location
         infoViews[2]= new InfoViewHolder(findViewById(R.id.recordInfo3Title), findViewById(R.id.recordInfo3Value));
         infoViews[3]= new InfoViewHolder(findViewById(R.id.recordInfo4Title), findViewById(R.id.recordInfo4Value));
         timeView= findViewById(R.id.recordTime);
+        gpsStatusView= findViewById(R.id.recordGpsStatus);
 
         updateDescription();
 
@@ -303,6 +304,11 @@ public class RecordWorkoutActivity extends FitoTrackActivity implements Location
         }
     }
 
+    @Override
+    public void onGPSStateChanged(WorkoutRecorder.GpsState oldState, WorkoutRecorder.GpsState state) {
+        gpsStatusView.setTextColor(state.color);
+    }
+
     public static class InfoViewHolder{
         TextView titleView, valueView;
 

app/src/main/java/de/tadris/fitness/location/WorkoutRecorder.java

@@ -20,6 +20,7 @@
 package de.tadris.fitness.location;
 
 import android.content.Context;
+import android.graphics.Color;
 import android.location.Location;
 import android.util.Log;
 
@@ -61,9 +62,16 @@ public class WorkoutRecorder implements LocationListener.LocationChangeListener
     private double distance= 0;
     private boolean hasBegan = false;
 
-    public WorkoutRecorder(Context context, String workoutType) {
+    private static final double SIGNAL_BAD_THRESHOLD= 20; // In meters
+    private static final int SIGNAL_LOST_THRESHOLD= 10000; // In milliseconds
+    private Location lastFix;
+    private GpsStateChangedListener gpsStateChangedListener;
+    private GpsState gpsState= GpsState.SIGNAL_LOST;
+
+    public WorkoutRecorder(Context context, String workoutType, GpsStateChangedListener gpsStateChangedListener) {
         this.context= context;
         this.state= RecordingState.IDLE;
+        this.gpsStateChangedListener= gpsStateChangedListener;
 
         this.workout= new Workout();
 
@@ -92,11 +100,10 @@ public class WorkoutRecorder implements LocationListener.LocationChangeListener
     }
 
     private void startWatchdog(){
-        new Thread(new Runnable() {
-            @Override
-            public void run() {
+        new Thread(() -> {
             try {
                 while (isActive()){
+                    checkSignalState();
                     synchronized (samples){
                         if(samples.size() > 2){
                             WorkoutSample lastSample= samples.get(samples.size()-1);
@@ -116,10 +123,24 @@ public class WorkoutRecorder implements LocationListener.LocationChangeListener
             } catch (InterruptedException e) {
                 e.printStackTrace();
             }
-            }
         }).start();
     }
 
+    private void checkSignalState(){
+        GpsState state;
+        if(System.currentTimeMillis() - lastFix.getTime() > SIGNAL_LOST_THRESHOLD){
+            state= GpsState.SIGNAL_LOST;
+        }else if(lastFix.getAccuracy() > SIGNAL_BAD_THRESHOLD){
+            state= GpsState.SIGNAL_BAD;
+        }else{
+            state= GpsState.SIGNAL_OKAY;
+        }
+        if(state != gpsState){
+            gpsStateChangedListener.onGPSStateChanged(gpsState, state);
+            gpsState= state;
+        }
+    }
+
     private void resume(){
         Log.i("Recorder", "Resume");
         state= RecordingState.RUNNING;
@@ -169,6 +190,7 @@ public class WorkoutRecorder implements LocationListener.LocationChangeListener
 
     @Override
     public void onLocationChange(Location location) {
+        lastFix= location;
         if(isActive()){
             double distance= 0;
             if(getSampleCount() > 0){
@@ -262,4 +284,20 @@ public class WorkoutRecorder implements LocationListener.LocationChangeListener
         IDLE, RUNNING, PAUSED, STOPPED
     }
 
+    public enum GpsState{
+        SIGNAL_LOST(Color.RED),
+        SIGNAL_OKAY(Color.GREEN),
+        SIGNAL_BAD(Color.YELLOW);
+
+        public int color;
+
+        GpsState(int color) {
+            this.color = color;
+        }
+    }
+
+    public interface GpsStateChangedListener{
+        void onGPSStateChanged(GpsState oldState, GpsState state);
+    }
+
 }

app/src/main/res/layout/activity_record_workout.xml

@@ -47,6 +47,15 @@
             android:layout_gravity="center"
             android:src="@drawable/location_marker" />
 
+        <TextView
+            android:id="@+id/recordGpsStatus"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="bottom|right"
+            android:layout_margin="5dp"
+            android:text="@string/gps"
+            android:textColor="@android:color/transparent" />
+
 
     </FrameLayout>
 

app/src/main/res/values/strings.xml

@@ -98,4 +98,5 @@
     <string name="exportDataSummary">This takes a backup of all your preferences and workout data</string>
     <string name="importBackup">Import Data Backup</string>
     <string name="importBackupSummary">Restore a taken backup</string>
+    <string name="gps">GPS</string>
 </resources>