Use of the progress bar Control

1   Package  Com. example. helloworld;  2   3   Import  Android. App. activity;  4   Import  Android. OS. Bundle;  5   Import  Android. View. view;  6   Import  Android. View. View. onclicklistener; 7   Import  Android. widget. Button;  8   Import  Android. widget. progressbar;  9   10   /**  11   * Common controls: Three progressbar listview  12   *  13   *  @ Author  David 14   *  15    */  16   Public   Class Tenlessondemo1 Extends  Activity {  17   18       Private Progressbar firstbar = Null  ;  19       Private Progressbar secondbar =Null  ;  20       Private Button mybutton = Null  ;  21       Private   Int I = 0 ;  22   23   @ Override  24       Protected   Void Oncreate (bundle savedinstancestate ){  25           //  Todo auto-generated method stub  26           Super  . Oncreate (savedinstancestate );  27           This  . Setcontentview (R. layout. tenone );  28 Firstbar = (Progressbar) findviewbyid (R. Id. firstbar );  29 Secondbar =(Progressbar) findviewbyid (R. Id. secondbar );  30 Mybutton = (Button) findviewbyid (R. Id. mybutton );  31 Mybutton. setonclicklistener ( New  Buttonlistener ());  32   System. Out. println (firstbar. getmax ());  33   }  34   35       Class ButtonlistenerImplements  Onclicklistener {  36   37           Public   Void  Onclick (view arg0 ){  38               //  Todo auto-generated method stub  39               If (I = 0 ){  40 Firstbar. setvisibility (view. Visible ); // Set the progress bar to visible  41   Secondbar. setvisibility (view. Visible );  42 } Else   If (I < Firstbar. getmax ()){  43 Firstbar. setprogress (I ); //  Set the current value of the progress bar  44 Firstbar. setsecondaryprogress (I + 10 ); //  Second color of the progress bar 45 Secondbar. setprogress (I ); //  This does not work, because the default progress bar cannot be displayed.  46 } Else  {  47   Firstbar. setvisibility (view. Gone );  48 Secondbar. setvisibility (view. Gone ); //  Set the progress bar to invisible  49   50   } 51 I = I + 10 ;  52   }  53   }  54 }

 

 1   <  Linearlayout  Xmlns: Android  = "Http://schemas.android.com/apk/res/android"  2   Android: layout_width  = "Fill_parent" 3   Android: layout_height  = "Fill_parent"  4   Android: Orientation  = "Vertical"   >  5   6       <  Textview  7           Android: ID  = "@ + ID/textview1"  8   Android: layout_width = "Fill_parent"  9   Android: layout_height  = "Wrap_content"  10   Android: Text  = "Hello"   />  11   12       <  Progressbar  13           Android: ID  = "@ + ID/firstbar"  14  Style  = "? Android: ATTR/progressbarstylehorizontal"  15   Android: layout_width  = "200dp"  16   Android: layout_height  = "Wrap_content"  17   Android: Max  = "200"  18   Android: visibility  = "Gone"   /> 19   20       <  Progressbar  21           Android: ID  = "@ + ID/secondbar"  22   Style  = "? Android: ATTR/progressbarstyle"  23   Android: layout_width  = "Wrap_content"  24   Android: layout_height = "Wrap_content"  25   Android: visibility  = "Gone"   />  26   27       <  Button  28           Android: ID  = "@ + ID/mybutton"  29   Android: layout_width  = "Wrap_content"  30  Android: layout_height  = "Wrap_content"  31   Android: Text  = "OK"   />  32   33   </  Linearlayout  >