通用列表适配器CommDataAdapter

通过一句代码完成常用adapter的创建，适用于所有的ListView，GridView布局，无论多复杂，并且多个不同布局的listview可以通用，GridView,ListView也可以共用一个。可以说整个工程用一个适配器就够了，实现代码如下：

public abstract class CommDataAdapter<T> extends BaseAdapter {
private ArrayList<T> mData;
private int mLayoutRes;           //布局id

protected CommDataAdapter(ArrayList<T> mData, int mLayoutRes) {
    this.mData = mData;
    this.mLayoutRes = mLayoutRes;
}

@Override
public int getCount() {
    return mData != null ? mData.size() : 0;
}

@Override
public T getItem(int position) {
    return mData.get(position);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = ViewHolder.bind(parent.getContext(), convertView, parent, mLayoutRes
            , position);
    bindView(holder, getItem(position));

    return holder.getItemView();
}

public abstract void bindView(ViewHolder holder, T obj);

//添加一个元素
public void add(T data) {
    if (mData == null) {
        mData = new ArrayList<>();
    }
    mData.add(data);
    notifyDataSetChanged();
}

//往特定位置，添加一个元素
public void add(int position, T data) {
    if (mData == null) {
        mData = new ArrayList<>();
    }
    mData.add(position, data);
    notifyDataSetChanged();
}

public void remove(T data) {
    if (mData != null) {
        mData.remove(data);
    }
    notifyDataSetChanged();
}

public void remove(int position) {
    if (mData != null) {
        mData.remove(position);
    }
    notifyDataSetChanged();
}

public void clear() {
    if (mData != null) {
        mData.clear();
    }
    notifyDataSetChanged();
}


protected static class ViewHolder {

    private SparseArray<View> mViews;   //存储ListView 的 item中的View
    private View item;                  //存放convertView
    private int position;               //游标
    private Context context;            //Context上下文

    //构造方法，完成相关初始化
    private ViewHolder(Context context, ViewGroup parent, int layoutRes) {
        mViews = new SparseArray<>();
        this.context = context;
        View convertView = LayoutInflater.from(context).inflate(layoutRes, parent, false);
        convertView.setTag(this);
        item = convertView;
    }

    //绑定ViewHolder与item
    public static ViewHolder bind(Context context, View convertView, ViewGroup parent,
                                  int layoutRes, int position) {
        ViewHolder holder;
        if (convertView == null) {
            holder = new ViewHolder(context, parent, layoutRes);
        } else {
            holder = (ViewHolder) convertView.getTag();
            holder.item = convertView;
        }
        holder.position = position;
        return holder;
    }

    @SuppressWarnings("unchecked")
    public <T extends View> T getView(int id) {
        T t = (T) mViews.get(id);
        if (t == null) {
            t = (T) item.findViewById(id);
            mViews.put(id, t);
        }
        return t;
    }


    /**
     * 获取当前条目
     */
    public View getItemView() {
        return item;
    }

    /**
     * 获取条目位置
     */
    public int getItemPosition() {
        return position;
    }

    /**
     * 设置文字
     */
    public ViewHolder setText(int id, CharSequence text) {
        View view = getView(id);
        if (view instanceof TextView) {
            ((TextView) view).setText(text);
        }
        return this;
    }

    /**
     * 设置图片
     */
    public ViewHolder setImageResource(int id, int drawableRes) {
        View view = getView(id);
        if (view instanceof ImageView) {
            ((ImageView) view).setImageResource(drawableRes);
        } else {
            view.setBackgroundResource(drawableRes);
        }
        return this;
    }

    public ViewHolder setBackgroundColor(int resId, int color) {
        View view = getView(resId);
        view.setBackgroundResource(color);
        return this;
    }

    /**
     * 设置点击监听
     */
    public ViewHolder setOnClickListener(int id, View.OnClickListener listener) {
        getView(id).setOnClickListener(listener);
        return this;
    }

    /**
     * 设置可见
     */
    public ViewHolder setVisibility(int id, int visible) {
        getView(id).setVisibility(visible);
        return this;
    }

    /**
     * 设置标签
     */
    public ViewHolder setTag(int id, Object obj) {
        getView(id).setTag(obj);
        return this;
    }

    //其他方法可自行扩展

}
}

使用方法如下：

mAdapter = new CommDataAdapter<GridBean>(mGridBeen, R.layout.view_item_gridview) {
        @Override
        public void bindView(ViewHolder holder, GridBean obj) {
            holder.setImageResource(R.id.image_icon, obj.getResId());
            holder.setText(R.id.txt_icon, obj.getiName());
        }
    };
listview.setAdapter(mAdapter);

其中mGridBeen是数据源，自定义的GridBean对象，view_item_gridview就是这个listview的布局

下面是我的GridBean 供参考：

public class GridBean {
private int resId;
private String iName;
private int iColor;

public GridBean(int resId, String iName) {
    this.resId = resId;
    this.iName = iName;
}

public GridBean(int resId, String iName, int iColor) {
    this.resId = resId;
    this.iName = iName;
    this.iColor = iColor;
}

public int getiColor() {
    return iColor;
}

public void setiColor(int iColor) {
    this.iColor = iColor;
}

public int getResId() {
    return resId;
}

public void setResId(int resId) {
    this.resId = resId;
}

public String getiName() {
    return iName;
}

public void setiName(String iName) {
    this.iName = iName;
}
}

布局文件view_item_gridview.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="match_parent"
          android:layout_margin="1dp"
          android:background="@xml/grad_pressed"
          android:gravity="center"
          android:orientation="vertical"
          android:padding="10dp">


<ImageView
    android:id="@+id/image_icon"
    android:layout_width="64dp"
    android:layout_height="64dp"
    android:contentDescription="@null"
    android:padding="10dp"
    android:src="@drawable/tools_order"/>

<TextView
    android:id="@+id/txt_icon"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="@dimen/font_14"/>
</LinearLayout>