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Performance: Keep reference to sharedPreferences.

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So far, we opened the SharedPreferences very often, which is very slow; also happened in the UI thread a lot.

Fixes #642.
This commit is contained in:
Dennis Guse
2021-03-15 12:01:32 +01:00
committed by GitHub
parent eebc33f60c
commit 15fbd90ca4
39 changed files with 355 additions and 344 deletions
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src/main/java/de/dennisguse/opentracks/fragments/IntervalsFragment.java
+11 -6
View File
@@ -44,14 +44,16 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
private IntervalStatisticsAdapter adapter;
private ArrayAdapter<IntervalStatisticsModel.IntervalOption> spinnerAdapter;
private SharedPreferences sharedPreferences;
private TrackDataHub trackDataHub;
private String category;
private IntervalListViewBinding viewBinding;
protected final SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceChangeListener = (preferences, key) -> {
protected final SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceChangeListener = (sharedPreferences, key) -> {
if (PreferencesUtils.isKey(getContext(), R.string.stats_units_key, key) || PreferencesUtils.isKey(getContext(), R.string.stats_rate_key, key)) {
metricUnits = PreferencesUtils.isMetricUnits(getContext());
metricUnits = PreferencesUtils.isMetricUnits(sharedPreferences, getContext());
if (adapter != null) {
adapter.notifyDataSetChanged();
spinnerAdapter.notifyDataSetChanged();
@@ -73,8 +75,9 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
PreferencesUtils.register(getContext(), sharedPreferenceChangeListener);
metricUnits = PreferencesUtils.isMetricUnits(getContext());
sharedPreferences = PreferencesUtils.getSharedPreferences(getContext());
sharedPreferences.registerOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
sharedPreferenceChangeListener.onSharedPreferenceChanged(sharedPreferences, null);
viewBinding.intervalList.setEmptyView(viewBinding.intervalListEmptyView);
@@ -125,6 +128,8 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
public void onPause() {
super.onPause();
pauseTrackDataHub();
sharedPreferences.unregisterOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
}
@Override
@@ -137,7 +142,7 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
public void onDestroy() {
super.onDestroy();
PreferencesUtils.unregister(getContext(), sharedPreferenceChangeListener);
sharedPreferences = null;
adapter = null;
viewModel = null;
@@ -183,7 +188,7 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
category = track != null ? track.getCategory() : "";
// Set rate label.
boolean reportSpeed = PreferencesUtils.isReportSpeed(getContext(), category);
boolean reportSpeed = PreferencesUtils.isReportSpeed(sharedPreferences, getContext(), category); //TODO Handle sharedPreferenceChangeListener
viewBinding.intervalRate.setText(reportSpeed ? R.string.stats_speed : R.string.stats_pace);
}
});