Added 5 minute poll

app/src/main/java/eu/faircode/email/FragmentOptionsSynchronize.java

@@ -65,6 +65,7 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
     private SwitchCompat swOptimize;
     private ImageButton ibOptimizeInfo;
     private Spinner spPollInterval;
+    private TextView tvPollBattery;
     private RecyclerView rvExempted;
     private SwitchCompat swSchedule;
     private TextView tvSchedulePro;
@@ -120,6 +121,7 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
         swOptimize = view.findViewById(R.id.swOptimize);
         ibOptimizeInfo = view.findViewById(R.id.ibOptimizeInfo);
         spPollInterval = view.findViewById(R.id.spPollInterval);
+        tvPollBattery = view.findViewById(R.id.tvPollBattery);
 
         swSchedule = view.findViewById(R.id.swSchedule);
         rvExempted = view.findViewById(R.id.rvExempted);
@@ -197,6 +199,7 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
                 if (value != current) {
                     adapterView.setTag(value);
                     prefs.edit().putInt("poll_interval", value).apply();
+                    tvPollBattery.setVisibility(value < 15 ? View.VISIBLE : View.GONE);
                     grpExempted.setVisibility(value == 0 ? View.GONE : View.VISIBLE);
                 }
             }
@@ -458,6 +461,7 @@ public class FragmentOptionsSynchronize extends FragmentBase implements SharedPr
                 break;
             }
 
+        tvPollBattery.setVisibility(pollInterval < 15 ? View.VISIBLE : View.GONE);
         grpExempted.setVisibility(pollInterval == 0 ? View.GONE : View.VISIBLE);
 
         swSchedule.setChecked(prefs.getBoolean("schedule", false) && pro);

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

@@ -164,6 +164,20 @@
                     app:layout_constraintStart_toStartOf="parent"
                     app:layout_constraintTop_toBottomOf="@id/tvOptimizeHint" />
 
+                <eu.faircode.email.FixedTextView
+                    android:id="@+id/tvPollBattery"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="6dp"
+                    android:layout_marginEnd="48dp"
+                    android:text="@string/title_advanced_poll_battery"
+                    android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                    android:textColor="?attr/colorWarning"
+                    android:textStyle="bold|italic"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/spPollInterval" />
+
                 <eu.faircode.email.FixedTextView
                     android:id="@+id/tvPollHint"
                     android:layout_width="0dp"
@@ -175,7 +189,7 @@
                     android:textStyle="italic"
                     app:layout_constraintEnd_toEndOf="parent"
                     app:layout_constraintStart_toStartOf="parent"
-                    app:layout_constraintTop_toBottomOf="@id/spPollInterval" />
+                    app:layout_constraintTop_toBottomOf="@id/tvPollBattery" />
 
                 <eu.faircode.email.FixedTextView
                     android:id="@+id/tvExempted"

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

@@ -672,6 +672,7 @@
     <string name="title_advanced_files" translatable="false">Files &gt;%1$s</string>
 
     <string name="title_advanced_manual_hint">If receiving messages is disabled, it is still possible to manually receive messages by pulling down the message list</string>
+    <string name="title_advanced_poll_battery">This can cause high battery usage!</string>
     <string name="title_advanced_poll_hint">Periodically checking for new messages will compare local and remote messages every time, which is an expensive operation that may result in extra battery usage, especially if there are a lot of messages. Always receive will prevent this by continuously following changes.</string>
     <string name="title_advanced_optimize_hint">This might change the sync frequency to save battery usage depending on the capabilities and behavior of the email servers</string>
     <string name="title_advanced_schedule_hint">Tap on a time to set a time</string>
@@ -1780,6 +1781,7 @@
 
     <string-array name="pollIntervalNames">
         <item>Always</item>
+        <item>Every 5 minutes</item>
         <item>Every 15 minutes</item>
         <item>Every 30 minutes</item>
         <item>Every hour</item>
@@ -1791,6 +1793,7 @@
 
     <integer-array name="pollIntervalValues" translatable="false">
         <item>0</item>
+        <item>5</item>
         <item>15</item>
         <item>30</item>
         <item>60</item>