Interval stats: added a new tab in TrackRecordingActivity that shows the intervals on live.

src/main/java/de/dennisguse/opentracks/TrackRecordingActivity.java

@@ -25,6 +25,7 @@ import de.dennisguse.opentracks.content.data.Track;
 import de.dennisguse.opentracks.content.provider.ContentProviderUtils;
 import de.dennisguse.opentracks.fragments.ChartFragment;
 import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment;
+import de.dennisguse.opentracks.fragments.IntervalsRecordingFragment;
 import de.dennisguse.opentracks.fragments.StatisticsRecordingFragment;
 import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
 import de.dennisguse.opentracks.services.TrackRecordingServiceInterface;
@@ -372,7 +373,7 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
 
         @Override
         public int getCount() {
-            return 3;
+            return 4;
         }
 
         @NonNull
@@ -382,8 +383,10 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
                 case 0:
                     return new StatisticsRecordingFragment();
                 case 1:
-                    return ChartFragment.newInstance(false);
+                    return new IntervalsRecordingFragment();
                 case 2:
+                    return ChartFragment.newInstance(false);
+                case 3:
                     return ChartFragment.newInstance(true);
                 default:
                     throw new RuntimeException("There isn't Fragment associated with the position: " + position);
@@ -396,8 +399,10 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
                 case 0:
                     return getString(R.string.track_detail_stats_tab);
                 case 1:
-                    return getString(R.string.settings_chart_by_time);
+                    return getString(R.string.track_detail_intervals_tab);
                 case 2:
+                    return getString(R.string.settings_chart_by_time);
+                case 3:
                     return getString(R.string.settings_chart_by_distance);
                 default:
                     throw new RuntimeException("There isn't Fragment associated with the position: " + position);

src/main/java/de/dennisguse/opentracks/fragments/IntervalsRecordingFragment.java

@@ -0,0 +1,132 @@
+package de.dennisguse.opentracks.fragments;
+
+import android.os.Bundle;
+import android.os.Handler;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.LinearLayout;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.ViewModelProvider;
+
+import de.dennisguse.opentracks.R;
+import de.dennisguse.opentracks.util.PreferencesUtils;
+import de.dennisguse.opentracks.viewmodels.IntervalStatistics;
+import de.dennisguse.opentracks.viewmodels.IntervalStatisticsModel;
+import de.dennisguse.opentracks.views.IntervalListView;
+import de.dennisguse.opentracks.views.IntervalReverseListView;
+
+/**
+ * A fragment to display the intervals from recording track.
+ */
+public class IntervalsRecordingFragment extends Fragment implements IntervalListView.IntervalListListener {
+
+    private static final String TAG = IntervalsRecordingFragment.class.getSimpleName();
+
+    private IntervalStatisticsModel viewModel;
+    private IntervalReverseListView intervalListView;
+
+    private class IntervalRunner implements Runnable {
+        private boolean stopped = false;
+
+        @Override
+        public void run() {
+            if (!stopped) {
+                updateIntervals();
+                intervalHandler.postDelayed(intervalRunner, 5000);
+            }
+        }
+
+        public void stop() {
+            stopped = true;
+        }
+    }
+
+    private Handler intervalHandler = null;
+    private IntervalRunner intervalRunner = null;
+
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.intervals_recording, container, false);
+    }
+
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        intervalHandler = new Handler();
+
+        intervalListView = new IntervalReverseListView(getActivity(), this);
+        intervalListView.setId(View.generateViewId());
+        LinearLayout linearLayout = view.findViewById(R.id.root_view);
+        linearLayout.removeAllViews();
+        linearLayout.addView(intervalListView);
+
+        viewModel = new ViewModelProvider(this).get(IntervalStatisticsModel.class);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (intervalRunner == null) {
+            intervalRunner = new IntervalRunner();
+            intervalRunner.run();
+        }
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+        if (intervalRunner != null) {
+            intervalRunner.stop();
+            intervalRunner = null;
+        }
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+
+        intervalListView.destroy();
+        intervalListView = null;
+        viewModel = null;
+    }
+
+    /**
+     * Update intervals through {@link IntervalStatisticsModel} view model.
+     *
+     * @param interval intervals will split in this interval if not null. If it's null then view model will use the default one.
+     */
+    private void updateIntervals(@Nullable IntervalStatisticsModel.IntervalOption interval) {
+        if (viewModel == null | intervalListView == null) {
+            return;
+        }
+
+        long trackId = PreferencesUtils.getRecordingTrackId(getContext());
+        viewModel.invalidate();
+        LiveData<IntervalStatistics> liveData;
+        if (interval == null) {
+            liveData = viewModel.getIntervalStats(trackId);
+        } else {
+            liveData = viewModel.getIntervalStats(trackId, interval);
+        }
+        liveData.observe(getActivity(), intervalStatistics -> {
+            if (intervalStatistics != null) {
+                intervalListView.display(intervalStatistics.getIntervalList());
+            }
+        });
+    }
+
+    private void updateIntervals() {
+        updateIntervals(null);
+    }
+
+    @Override
+    public void intervalChanged(IntervalStatisticsModel.IntervalOption interval) {
+        updateIntervals(interval);
+    }
+}

src/main/java/de/dennisguse/opentracks/viewmodels/IntervalStatisticsModel.java

@@ -15,6 +15,10 @@ import de.dennisguse.opentracks.content.provider.ContentProviderUtils;
 import de.dennisguse.opentracks.util.PreferencesUtils;
 import de.dennisguse.opentracks.util.UnitConversions;
 
+/**
+ * This view model is used to load intervals for a track.
+ * It uses a default interval but it can be set from outside to manage the interval length.
+ */
 public class IntervalStatisticsModel extends AndroidViewModel {
 
     private MutableLiveData<IntervalStatistics> intervalStats;
@@ -38,6 +42,9 @@ public class IntervalStatisticsModel extends AndroidViewModel {
         return getIntervalStats(trackId, interval);
     }
 
+    /**
+     * Call this method when you want to force the view model to re-load intervals.
+     */
     public void invalidate() {
         intervalStats = null;
     }
@@ -56,6 +63,9 @@ public class IntervalStatisticsModel extends AndroidViewModel {
         }).start();
     }
 
+    /**
+     * Intervals length this view model support.
+     */
     public enum IntervalOption {
         OPTION_1(1),
         OPTION_2(2),

src/main/java/de/dennisguse/opentracks/views/IntervalListView.java

@@ -17,17 +17,21 @@ import de.dennisguse.opentracks.util.PreferencesUtils;
 import de.dennisguse.opentracks.viewmodels.IntervalStatistics;
 import de.dennisguse.opentracks.viewmodels.IntervalStatisticsModel;
 
+/**
+ * LinearLayout view used to build a list of intervals.
+ * See {@link IntervalStatisticsAdapter}.
+ */
 public class IntervalListView extends LinearLayout {
 
-    private IntervalStatisticsAdapter adapter;
-    private LinearLayout linearLayoutIntervals;
-    private Spinner spinnerIntervals;
-    private TextView spinnerIntervalsUnit;
+    protected IntervalStatisticsAdapter adapter;
+    protected LinearLayout linearLayoutIntervals;
+    protected Spinner spinnerIntervals;
+    protected TextView spinnerIntervalsUnit;
 
-    private Context context;
-    private IntervalListListener listener;
+    protected Context context;
+    protected IntervalListListener listener;
 
-    private final SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceChangeListener = (preferences, key) -> {
+    protected final SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceChangeListener = (preferences, key) -> {
         if (PreferencesUtils.isKey(getContext(), R.string.stats_units_key, key) || PreferencesUtils.isKey(getContext(), R.string.stats_rate_key, key)) {
             if (spinnerIntervalsUnit != null) {
                 spinnerIntervalsUnit.setText(PreferencesUtils.isMetricUnits(context) ? context.getString(R.string.unit_kilometer) : context.getString(R.string.unit_mile));
@@ -43,7 +47,7 @@ public class IntervalListView extends LinearLayout {
         init();
     }
 
-    private void init() {
+    protected void init() {
         inflate(getContext(), R.layout.interval_list_view, this);
         linearLayoutIntervals = findViewById(R.id.interval_list);
         spinnerIntervals = findViewById(R.id.spinner_intervals);

src/main/java/de/dennisguse/opentracks/views/IntervalReverseListView.java

@@ -0,0 +1,31 @@
+package de.dennisguse.opentracks.views;
+
+import android.content.Context;
+import android.view.View;
+
+import java.util.List;
+
+import de.dennisguse.opentracks.adapters.IntervalStatisticsAdapter;
+import de.dennisguse.opentracks.viewmodels.IntervalStatistics;
+
+/**
+ * LinearLayout view used to build a list of intervals in a reverse mode, the last one will appear in the first position on the LinearLayout.
+ * This class is an specialization of {@link IntervalListView} that display the views contained in the LinearLayout in a reverse mode.
+ */
+public class IntervalReverseListView extends IntervalListView {
+
+    public IntervalReverseListView(Context context, IntervalListListener listener) {
+        super(context, listener);
+    }
+
+    public void display(List<IntervalStatistics.Interval> intervalList) {
+        if (intervalList != null) {
+            adapter = new IntervalStatisticsAdapter(getContext(), intervalList);
+            linearLayoutIntervals.removeAllViews();
+            for (int i = 0; i < adapter.getCount(); i++) {
+                View intervalView = adapter.getView(i, null, linearLayoutIntervals);
+                linearLayoutIntervals.addView(intervalView, 0);
+            }
+        }
+    }
+}

src/main/res/layout/intervals_recording.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    style="@style/StatsScrollView">
+
+    <LinearLayout
+        android:id="@+id/root_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:layout_marginBottom="16dp"
+        android:layout_marginLeft="8dp"
+        android:layout_marginRight="8dp" />
+
+</ScrollView>

src/main/res/values/strings.xml

@@ -432,6 +432,7 @@ limitations under the License.
     <!-- Track Detail -->
     <string name="track_detail_chart_tab">Chart</string>
     <string name="track_detail_stats_tab">Stats</string>
+    <string name="track_detail_intervals_tab">Intervals</string>
     <string name="track_detail_record_success">Now recording a new track</string>
     <string name="track_detail_resume_success">Now resuming the track</string>
     <!-- Track Edit -->