SeekBarPreference: show the formatted current value in the preference dialog.

android/res/layout/seekbar_preference.xml

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:padding="16dp"
     android:orientation="vertical" >
 
+    <TextView
+        android:id="@+id/valueText"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:gravity="center_horizontal"
+        android:textAppearance="?android:attr/textAppearanceMedium" />
+
     <SeekBar
         android:id="@+id/seekBar"
         android:layout_width="match_parent"
         android:layout_height="0dp"
-        android:layout_weight="1"
-        android:padding="20dp" />
+        android:layout_weight="1" />
 
 </LinearLayout>

android/src/com/reecedunn/espeak/SeekBarPreference.java

 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.SeekBar;
+import android.widget.TextView;
 
-public class SeekBarPreference extends DialogPreference
+public class SeekBarPreference extends DialogPreference implements SeekBar.OnSeekBarChangeListener
 {
     private SeekBar mSeekBar;
+    private TextView mValueText;
 
     private int mProgress = 0;
     private int mMin = 0;
     protected View onCreateDialogView() {
         View root = super.onCreateDialogView();
         mSeekBar = (SeekBar)root.findViewById(R.id.seekBar);
+        mValueText = (TextView)root.findViewById(R.id.valueText);
         return root;
     }
 
     @Override
     protected void onBindDialogView(View view) {
+        mSeekBar.setOnSeekBarChangeListener(this);
         mSeekBar.setMax(mMax - mMin);
         mSeekBar.setProgress(mProgress + mMin);
     }
         }
         super.onClick(dialog, which);
     }
+
+    @Override
+    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser)
+    {
+        String text = String.format(getFormatter(), Integer.toString(progress + mMin));
+        mValueText.setText(text);
+    }
+
+    @Override
+    public void onStartTrackingTouch(SeekBar seekBar)
+    {
+    }
+
+    @Override
+    public void onStopTrackingTouch(SeekBar seekBar)
+    {
+    }
 }