自定义ImageButton，实现快进快退功能

      具体做法是仿照系统的RockAudioPlayer，我也是通过查看源码，然后把它简化出来，更容易于应用。通过自定义一个RepeatingImageButton，当然这个名字可以自己更改，RepeatingImageButton里的代码可以查看RockAudioPlayer的源码，我这里只给出经过简化过的java代码。

  
    

   
      1 
   
     public
   
      
   
     class
   
      MainActivity 
   
     extends
   
      Activity {

   
      2 
   
      
   
     /**
   
      Called when the activity is first created. edit by etgyd
   
     */
   
     

   
      3 
   
      
   
     private
   
      RepeatingImageButton last;

   
      4 
   
      @Override

   
      5 
   
      
   
     public
   
      
   
     void
   
      onCreate(Bundle savedInstanceState) {

   
      6 
   
      
   
     super
   
     .onCreate(savedInstanceState);

   
      7 
   
      setContentView(R.layout.main);

   
      8 
   
      last 
   
     =
   
      (RepeatingImageButton) findViewById(R.id.last);

   
      9 
   
      last.setRepeatListener(rep, 
   
     260
   
     );

   
     10 
   
      last.setOnClickListener(
   
     new
   
      OnClickListener() {

   
     11 
   
     

   
     12 
   
      @Override

   
     13 
   
      
   
     public
   
      
   
     void
   
      onClick(View v) {

   
     14 
   
      
   
     //
   
      TODO Auto-generated method stub
   
     

   
     15 
   
      
   
      System.out.println(
   
     "
   
     last
   
     "
   
     );

   
     16 
   
      }

   
     17 
   
      });

   
     18 
   
      }

   
     19 
   
     

   
     20 
   
      
   
     private
   
      RepeatingImageButton.RepeatListener rep 
   
     =
   
      
   
     new
   
      RepeatingImageButton.RepeatListener() {

   
     21 
   
     

   
     22 
   
      @Override

   
     23 
   
      
   
     public
   
      
   
     void
   
      onRepeat(View v, 
   
     long
   
      duration, 
   
     int
   
      repeatcount) {

   
     24 
   
      
   
     //
   
      TODO Auto-generated method stub
   
     

   
     25 
   
     
   
      scanBackward(repeatcount, duration);

   
     26 
   
      }

   
     27 
   
      };

   
     28 
   
     

   
     29 
   
      
   
     private
   
      
   
     void
   
      scanBackward(
   
     int
   
      repcnt, 
   
     long
   
      delta) {

   
     30 
   
      
   
     try
   
      {

   
     31 
   
      
   
     if
   
      (delta 
   
     <
   
      
   
     5000
   
     ) {

   
     32 
   
      
   
     //
   
      seek at 10x speed for the first 5 seconds
   
     

   
     33 
   
     
   
      delta 
   
     =
   
      delta 
   
     *
   
      
   
     10
   
     ;

   
     34 
   
      System.out.println(
   
     "
   
     long pause
   
     "
   
      
   
     +
   
      delta);

   
     35 
   
      } 
   
     else
   
      {

   
     36 
   
      
   
     //
   
      seek at 40x after that
   
     

   
     37 
   
     
   
      delta 
   
     =
   
      
   
     50000
   
      
   
     +
   
      (delta 
   
     -
   
      
   
     5000
   
     ) 
   
     *
   
      
   
     40
   
     ;

   
     38 
   
      System.out.println(
   
     "
   
     long pause fast
   
     "
   
     );

   
     39 
   
      }

   
     40 
   
      } 
   
     catch
   
      (Exception ex) {

   
     41 
   
      }

   
     42 
   
      }

   
     43 
   
     }