android listview点赞问题

《最近做一个小功能遇到这么一个问题，listview 与 baseadapter结合使用，关于点赞的的时候 图片重复问题，比如：我在第1个item 点赞然后 心型换成了红色，但是以后每隔几个item就会出现一个红色的心，响应事件是对的，不知道哪出的问题，请大神解答”》
上面是一小哥在论坛中发的帖子遇到的问题，跟我遇到的问题一样，下面有很多热心的评论哥们给出了思路，我一想，原来这么简单啊。

先给出实现代码，最后再来讲思路好了。

• 效果图

• MainActivity.java

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<ContentBean> data = new ArrayList<ContentBean>();
        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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.zan.MainActivity" >

    <ListView
        android:id="@+id/listview"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView>

</RelativeLayout>

• 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<ContentBean> data = new ArrayList<ContentBean>();
    Context context;
    public MyAdapter(Context context, List<ContentBean> 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

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:gravity="center"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/zan_img"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
      />

    <TextView
        android:id="@+id/zan_num"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
       />
</LinearLayout>

• 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);

    }
}