AndroidListview点赞问题关于图片重复问题

public class MainActivity extends Activity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    //模拟的数据内容集合
    List data = new ArrayList();
    for (int i = 0; i <15; i++) {
      ContentBean bean = new ContentBean();
      // 默认都给他们赋值当前都没有点赞
      bean.setZanFocus(false);
      bean.setZanNum(i);
      // 默认都给他们赋值当前都没有收藏
      bean.setShoucanFocus(false);
      bean.setShoucanNum(i);
      data.add(bean);
    }
    ListView listview = (ListView) findViewById(R.id.listview);
    listview.setAdapter(new MyAdapter(this,data));
  }
main.xml

  
  

ContentBean.java
public class ContentBean {
  private boolean zanFocus, shoucanFocus;
  private int zanNum, shoucanNum;
  public boolean isShoucanFocus() {
    return shoucanFocus;
  }
  public void setShoucanFocus(boolean shoucanFocus) {
    this.shoucanFocus = shoucanFocus;
  }
  public int getShoucanNum() {
    return shoucanNum;
  }
  public void setShoucanNum(int shoucanNum) {
    this.shoucanNum = shoucanNum;
  }
  public boolean isZanFocus() {
    return zanFocus;
  }
  public void setZanFocus(boolean zanFocus) {
    this.zanFocus = zanFocus;
  }
  public int getZanNum() {
    return zanNum;
  }
  public void setZanNum(int zanNum) {
    this.zanNum = zanNum;
  }
}
MyAdapter.java
public class MyAdapter extends BaseAdapter {
  List data = new ArrayList();
  Context context;
  public MyAdapter(Context context, List data) {
    this.cOntext= context;
    this.data = data;
  }
  @Override
  public int getCount() {
    return data.size();// 返回20条数据
  }
  @Override
  public Object getItem(int arg0) {
    return data.get(arg0);
  }
  @Override
  public long getItemId(int position) {
    // TODO Auto-generated method stub
    return position;
  }
  @Override
  public View getView(final int position, View convertView, ViewGroup parent) {
      final ViewHolder holder;
    final ContentBean bean = data.get(position);
    if (cOnvertView== null) {
      cOnvertView= LayoutInflater.from(context).inflate(R.layout.item,
          parent, false);
      holder = new ViewHolder();
      holder.zan_img = (ImageView) convertView.findViewById(R.id.zan_img);
      holder.zan_num = (TextView) convertView.findViewById(R.id.zan_num);
      holder.shoucan_img = (ImageView) convertView.findViewById(R.id.shoucan_img);
      holder.shoucan_num = (TextView) convertView.findViewById(R.id.shoucan_num);
      convertView.setTag(holder);
    } else {
      holder = (ViewHolder) convertView.getTag();
    }
    // 取出bean中当记录状态是否为true，是的话则给img设置focus点赞图片
    if (bean.isZanFocus()) {
      holder.zan_img.setImageResource(R.drawable.zan_focus);
    } else {
      holder.zan_img.setImageResource(R.drawable.zan_release);
    }
    // 取出bean中当记录状态是否为true，是的话则给img设置release收藏图片
    if (bean.isShoucanFocus()) {
      holder.shoucan_img.setImageResource(R.drawable.shoucang_focus);
    } else {
      holder.shoucan_img.setImageResource(R.drawable.shoucang_release);
    }
    // 设置赞的数量
    holder.zan_num.setText(bean.getZanNum() + "");
    //设置收藏的数量
    holder.shoucan_num.setText(bean.getShoucanNum()+"");
    holder.zan_img.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        // 获取上次是否已经被点击
        boolean flag = bean.isZanFocus();
        // 判断当前flag是点赞还是取消赞,是的话就给bean值减1，否则就加1
        if (flag) {
          bean.setZanNum(bean.getZanNum() - 1);
        } else {
          bean.setZanNum(bean.getZanNum() + 1);
        }
        // 反向存储记录，实现取消点赞功能
        bean.setZanFocus(!flag);
        AnimationTools.scale(holder.zan_img);
      }
    });
    holder.shoucan_img.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        // 获取上次是否已经被点击
        boolean flag = bean.isShoucanFocus();
        // 判断当前flag是收藏还是取收藏,是的话就给bean值减1，否则就加1
        if (flag) {
          bean.setShoucanNum(bean.getShoucanNum() - 1);
        } else {
          bean.setShoucanNum(bean.getShoucanNum() + 1);
        }
        // 反向存储记录，实现取消收藏功能
        bean.setShoucanFocus(!flag);
        //动画
        AnimationTools.scale(holder.shoucan_img);
      }
    });
    return convertView;
  }
  private class ViewHolder {
    private ImageView zan_img,shoucan_img;
    private TextView zan_num,shoucan_num;
  }
}
item.xml
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AnimationTools.java
public class AnimationTools {
  public static void scale(View v) {
    ScaleAnimation anim = new ScaleAnimation(1.0f, 1.5f, 1.0f, 1.5f,
        Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
        0.5f);
    anim.setDuration(300);
    v.startAnimation(anim);
  }
}