Android图像滑块变焦

Question

我使用this image slider，我真的很喜欢它。但我需要缩放选项也可以添加缩放选项吗？

Answer 1

没有它不支持，但您可以添加此功能是，图像显示在imageview的并且可以添加此功能，例如这下面的代码是你想拥有，并加入到支持

public class Zoom extends View { 

    private Drawable image; 
    ImageButton img,img1; 
    private int zoomControler=20; 

    public Zoom(Context context){ 
      super(context); 

      image=context.getResources().getDrawable(R.drawable.j); 
      //image=context.getResources().getDrawable(R.drawable.icon); 

      setFocusable(true); 
    } 

    @Override 
    protected void onDraw(Canvas canvas) { 
     super.onDraw(canvas); 

     //here u can control the width and height of the images........ this line is very important 
     image.setBounds((getWidth()/2)-zoomControler, (getHeight()/2)-zoomControler, (getWidth()/2)+zoomControler, (getHeight()/2)+zoomControler); 
     image.draw(canvas); 
    } 

    @Override 
    public boolean onKeyDown(int keyCode, KeyEvent event) { 
      if(keyCode==KeyEvent.KEYCODE_DPAD_UP){ 
        // zoom in 
        zoomControler+=10; 
      } 
      if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN){ 
        // zoom out 
        zoomControler-=10; 
      } 
      if(zoomControler<10){ 
        zoomControler=10; 
      } 
      invalidate(); 
      return true; 
    } 
}