在自動滾動horizo​​ntalscrolview中顯示圖像

Question

我使用horizo​​ntalscrollView將一組圖像作爲幻燈片放映。我有5張可繪製的圖像，我可以將圖像從右向左移動，但在某些手機中，它只是滾動到第3張圖像並重新開始滾動，並且在某些手機中，它只是停止滾動，直到到達右側圖像的末尾。請幫忙 ！！這是我使用的代碼：

public void getScrollMaxAmount(){ 
    int actualWidth = (horizontalOuterLayout.getMeasuredWidth()-200); 
    scrollMax = actualWidth; 
} 

public void startAutoScrolling(){ 
    if (scrollTimer == null) { 
     scrollTimer=new Timer(); 
     final Runnable Timer_Tick=new Runnable() { 
      public void run() { 
       moveScrollView(); 
      } 
     }; 

     if(scrollerSchedule != null){ 
      scrollerSchedule.cancel(); 
      scrollerSchedule = null; 
     } 
     scrollerSchedule = new TimerTask(){ 
      @Override 
      public void run(){ 
       runOnUiThread(Timer_Tick); 
      } 
     }; 

     scrollTimer.schedule(scrollerSchedule, 50, 50); 
    } 
} 

public void moveScrollView(){ 
    scrollPos= (int) (hsv2.getScrollX() + 1.0); 
    if(scrollPos >= scrollMax){ 
     scrollPos=0; 
    } 
    hsv2.scrollTo(scrollPos, 0); 
} 

public void addImagesToView(){ 
    for (int i=0;i<imageNameArray.length;i++){ 
     Log.d("imagname",String.valueOf(imageNameArray.length)); 
     final ImageView imageButton = new ImageView(this); 
    int imageResourceId  = getResources().getIdentifier(imageNameArray[i], "drawable",getPackageName()); 
    Drawable image = this.getResources().getDrawable(imageResourceId); 

     imageButton.setBackgroundDrawable(image); 
     imageButton.setTag(i); 
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(90,LayoutParams.WRAP_CONTENT); 
     //params.setMargins(0, 25, 0, 25); 
     imageButton.setLayoutParams(params); 
     horizontalOuterLayout.addView(imageButton); 
    } 

Answer 1

First calculate width of your scrollview like this here linearlayout is layout inside your scrollview 


    linearLayout.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() { 
       @Override 
       public void onGlobalLayout() { 

        LayoutParams layParamsGet = linearLayout.getLayoutParams(); 
        width = layParamsGet.width; 

       } 
      }); 


Then in timertassk just scroll the scrollview upto end 

private void callAsynchronousTask() { 
    final Handler handler = new Handler(); 
    timer = new Timer(); 
    TimerTask doAsynchronousTask = new TimerTask() { 
     @Override 
     public void run() { 
      handler.post(new Runnable() { 
       public void run() { 
        try { 

         if (x <= width - KeyConstants.SCREEN_WIDTH) { 
          x = x + 1; 
         } else { 

          x = 0; 
         } 

         mhorizontalscrollView.scrollTo(x, 0); 

        } catch (Exception e) { 
        } 
       } 
      }); 
     } 
    }; 
    timer.schedule(doAsynchronousTask, 0, 5); 
}