You need to make a smoothly filled ProgressBar following form: 
There are resourcesbackground.png

progress.png

I tried to do somain.xml
<ProgressBar android:id="@+id/progressBar" style="?android:attr/progressBarStyleHorizontal" android:layout_width="250dp" android:layout_height="100dp" android:layout_gravity="center_horizontal|center_vertical" android:background="@drawable/background" android:max="100" android:progressDrawable="@drawable/back_arc" > </ProgressBar> back_arc.xml
<?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android" > <item android:id="@+id/bar_value"> <clip android:clipOrientation="horizontal" android:drawable="@drawable/progress" /> </item> </layer-list> The result was a little different. 
Threadc sendinghandlerandincrementProgressBy()- tim_taller in it