使用视图寻呼机每5秒切换片段android

Question

我使用视图寻呼机在android中使用viewpager通过手指滑动片段。它的工作正常，但现在我想这样做，如果用户不触摸屏幕，它会自动更改片段，每隔几秒后。请帮助我如何做到这一点。

Answer 1

public class AutoSwitcherViewPager extends ViewPager { 



    private Runnable mSwither = new Runnable() { 

     /* 
     * (non-Javadoc) 
     * @see java.lang.Runnable#run() 
     * @since Jun 13, 2013 
     * @author rajeshcp 
     */ 
     @Override 
     public void run() { 
      if(AutoSwitcherViewPager.this.getAdapter() != null) 
      { 
       int count = AutoSwitcherViewPager.this.getCurrentItem(); 

       if(count == (AutoSwitcherViewPager.this.getAdapter().getCount() - 1)) 
       { 
        count = 0; 
       }else 
       { 
        count++; 
       } 

       Log.d(this.getClass().getName(), "Curent Page " + count + ""); 
       AutoSwitcherViewPager.this.setCurrentItem(count, true); 
      } 
      AutoSwitcherViewPager.this.postDelayed(this, 5000); 
     } 
    }; 


    /** 
    * @param context 
    * @return of type AutoSwitcherViewPager 
    * Constructor function 
    * @since Jun 13, 2013 
    * @author rajeshcp 
    */ 
    public AutoSwitcherViewPager(Context context) { 
     this(context, null); 
    } 

    /** 
    * @param context 
    * @param attrs 
    * @return of type AutoSwitcherViewPager 
    * Constructor function 
    * @since Jun 13, 2013 
    * @author rajeshcp 
    */ 
    public AutoSwitcherViewPager(Context context, AttributeSet attrs) { 
     super(context, attrs); 
     postDelayed(mSwither, 5000); 
    } 

    /* 
    * (non-Javadoc) 
    * @see android.support.v4.view.ViewPager#onTouchEvent(android.view.MotionEvent) 
    * @since Jun 13, 2013 
    * @author rajeshcp 
    */ 
    @Override 
    public boolean onTouchEvent(MotionEvent arg0) { 
     switch (arg0.getAction()) { 
     case MotionEvent.ACTION_CANCEL: 
     case MotionEvent.ACTION_UP : 
      postDelayed(mSwither, 5000); 
      break; 

     default: 
      removeCallbacks(mSwither); 
      break; 
     } 
     return super.onTouchEvent(arg0); 
    } 



} 

使用这个类作为您ViewPager

<packagename.AutoSwitcherViewPager 
    android:id="@+id/pager" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" /> 

与AutoSwitcherViewPager类包