Added progress listener and text view for seek bar in settings.

src/main/java/com/example/pharmacy/frontEnd/Settings.java

@@ -66,9 +66,36 @@ public class Settings extends AppCompatActivity{
                 startActivity(intent);
             }
         });
+        setUpSeekBar();
         populateSpinner();
     }
 
+    private void setUpSeekBar(){
+        SeekBar bar = ((SeekBar)findViewById(R.id.seekBar2));
+        bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
+           private TextView progressText;
+            {
+                progressText = ((TextView) findViewById(R.id.seekBarValue));
+            }
+
+            @Override
+            public void onProgressChanged(SeekBar bar, int progress, boolean fromUser) {
+                int val = (progress * (bar.getWidth() - 2 * bar.getThumbOffset())) / bar.getMax();
+                progressText.setText("" + progress);
+                progressText.setX(bar.getX() + val + bar.getThumbOffset() / 2);
+            }
+            @Override
+        public void onStartTrackingTouch(SeekBar bar){
+                progressText.setVisibility(View.VISIBLE);
+        }
+
+        @Override
+            public void onStopTrackingTouch(SeekBar bar){
+            progressText.setVisibility(View.INVISIBLE);
+        }
+        });
+    }
+
     private void populateSpinner(){
         Spinner spinner =  findViewById(R.id.PeriodSpinner);
         ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.notification_periods, android.R.layout.simple_spinner_dropdown_item);

src/main/res/layout/settings.xml

@@ -167,4 +167,14 @@
         app:layout_constraintStart_toEndOf="@+id/textView8"
         app:layout_constraintTop_toBottomOf="@+id/Vibration" />
 
+    <TextView
+        android:id="@+id/seekBarValue"
+        android:layout_width="36dp"
+        android:layout_height="33dp"
+        android:layout_marginStart="8dp"
+        android:text="TextView"
+        android:visibility="invisible"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/seekBar2" />
+
 </android.support.constraint.ConstraintLayout>
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