Add method to control if measurment views should update internal views

The table view doesn't actually display the measurement views, it only
uses them for formatting the value that is later displayed. So to
speed up that view, avoid doing calculations that aren't used.

android_app/app/src/main/java/com/health/openscale/gui/fragments/TableFragment.java

@@ -124,6 +124,10 @@ public class TableFragment extends Fragment implements FragmentUpdateListener {
         measurementsList.add(new BMRMeasurementView(tableView.getContext()));
         measurementsList.add(new CommentMeasurementView(tableView.getContext()));
 
+        for (MeasurementView measurement : measurementsList) {
+            measurement.setUpdateViews(false);
+        }
+
         prefs = PreferenceManager.getDefaultSharedPreferences(tableView.getContext());
 
         if (savedInstanceState == null) {

android_app/app/src/main/java/com/health/openscale/gui/views/DateMeasurementView.java

@@ -43,9 +43,11 @@ public class DateMeasurementView extends MeasurementView {
     private void setValue(Date newDate, boolean callListener) {
         if (!newDate.equals(date)) {
             date = newDate;
+            if (getUpdateViews()) {
                 setValueView(dateFormat.format(date), callListener);
             }
         }
+    }
 
     @Override
     public void loadFrom(ScaleMeasurement measurement, ScaleMeasurement previousMeasurement) {

android_app/app/src/main/java/com/health/openscale/gui/views/FloatMeasurementView.java

@@ -116,17 +116,14 @@ public abstract class FloatMeasurementView extends MeasurementView {
         return Math.max(0.0f, Math.min(getMaxValue(), value));
     }
 
-    private void setValue(float newValue, float newPreviousValue, boolean callListener) {
+    private void setValueInner(float newValue, String suffix, boolean callListener) {
-        final String unit = getUnit();
-        final String suffix = unit.isEmpty() ? "" : " " + unit;
-
-        final boolean valueChanged = newValue != value;
-        final boolean previousValueChanged = newPreviousValue != previousValue;
-
-        if (valueChanged) {
         value = newValue;
         evaluationResult = null;
 
+        if (!getUpdateViews()) {
+            return;
+        }
+
         if (value == AUTO_VALUE) {
             setValueView(getContext().getString(R.string.label_automatic), false);
         }
@@ -141,8 +138,13 @@ public abstract class FloatMeasurementView extends MeasurementView {
         setEvaluationView(evaluationResult);
     }
 
-        if (valueChanged || previousValueChanged) {
+    private void setPreviousValueInner(float newPreviousValue, String suffix) {
         previousValue = newPreviousValue;
+
+        if (!getUpdateViews()) {
+            return;
+        }
+
         if (previousValue >= 0.0f) {
             final float diff = value - previousValue;
 
@@ -172,10 +174,26 @@ public abstract class FloatMeasurementView extends MeasurementView {
                     Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
 
             setNameView(text);
-            } else {
+        }
+        else {
             setNameView(nameText);
         }
     }
+
+    private void setValue(float newValue, float newPreviousValue, boolean callListener) {
+        final String unit = getUnit();
+        final String suffix = unit.isEmpty() ? "" : " " + unit;
+
+        final boolean valueChanged = newValue != value;
+        final boolean previousValueChanged = newPreviousValue != previousValue;
+
+        if (valueChanged) {
+            setValueInner(newValue, suffix, callListener);
+        }
+
+        if (valueChanged || previousValueChanged) {
+            setPreviousValueInner(newPreviousValue, suffix);
+        }
     }
 
     private void incValue() {

android_app/app/src/main/java/com/health/openscale/gui/views/MeasurementView.java

@@ -67,6 +67,8 @@ public abstract class MeasurementView extends TableLayout {
     private MeasurementViewUpdateListener updateListener = null;
     private MeasurementViewMode measurementMode = VIEW;
 
+    private boolean updateViews = true;
+
     public MeasurementView(Context context, String text, Drawable icon) {
         super(context);
         initView(context);
@@ -150,6 +152,13 @@ public abstract class MeasurementView extends TableLayout {
         updateListener = listener;
     }
 
+    public void setUpdateViews(boolean update) {
+        updateViews = update;
+    }
+    protected boolean getUpdateViews() {
+        return updateViews;
+    }
+
     public abstract void loadFrom(ScaleMeasurement measurement, ScaleMeasurement previousMeasurement);
     public abstract void saveTo(ScaleMeasurement measurement);
 
@@ -206,15 +215,19 @@ public abstract class MeasurementView extends TableLayout {
     }
 
     protected void setValueView(String text, boolean callListener) {
+        if (updateViews) {
             valueView.setText(text);
+        }
         if (callListener && updateListener != null) {
             updateListener.onMeasurementViewUpdate(this);
         }
     }
 
     protected void setNameView(CharSequence text) {
+        if (updateViews) {
             nameView.setText(text);
         }
+    }
 
     protected void showEvaluatorRow(boolean show) {
         if (show) {
@@ -246,6 +259,10 @@ public abstract class MeasurementView extends TableLayout {
     }
 
     protected void setEvaluationView(EvaluationResult evalResult) {
+        if (!updateViews) {
+            return;
+        }
+
         if (evalResult == null) {
             evaluatorView.setLimits(-1.0f, -1.0f);
             indicatorView.setBackgroundColor(Color.GRAY);

android_app/app/src/main/java/com/health/openscale/gui/views/TimeMeasurementView.java

@@ -44,9 +44,11 @@ public class TimeMeasurementView extends MeasurementView {
     private void setValue(Date newTime, boolean callListener) {
         if (!newTime.equals(time)) {
             time = newTime;
+            if (getUpdateViews()) {
                 setValueView(timeFormat.format(time), callListener);
             }
         }
+    }
 
     @Override
     public void loadFrom(ScaleMeasurement measurement, ScaleMeasurement previousMeasurement) {