万能适配器 CommonAdapter

package com.stephen.ifishing.adapter;import java.util.List;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;/** *  * @author Stephen Huang * * @param <T> */public abstract class CommonAdapter<T> extends BaseAdapter {    protected Context mContext;    protected List<T> mDatas;    protected LayoutInflater mInflater;    protected int layoutId;    public CommonAdapter(Context context, List<T> data, int layoutId) {        this.mContext = context;        mInflater = LayoutInflater.from(context);        this.mDatas = data;        this.layoutId = layoutId;    }    @Override    public int getCount() {        return mDatas.size();    }    @Override    public T getItem(int position) {        return mDatas.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    public void onDataChange(List<T> data) {        this.mDatas = data;        this.notifyDataSetChanged();    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder holder = ViewHolder.get(mContext, convertView, parent, layoutId, position);        convert(holder, mDatas.get(position));        return holder.getConvertView();    }    public abstract void convert(ViewHolder holder, T t);}

 2. 辅助类ViewHolder

package com.stephen.ifishing.adapter;import android.content.Context;import android.graphics.Bitmap;import android.util.SparseArray;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.TextView;/** *  * @author Stephen Huang * */public class ViewHolder {    private SparseArray<View> mViews;    private int mPostion;    private View mConvertView;    public ViewHolder(Context context, ViewGroup parent, int layoutId, int postion) {        this.mPostion = postion;        this.mViews = new SparseArray<View>();        this.mConvertView = LayoutInflater.from(context).inflate(layoutId, null);        mConvertView.setTag(this);    }    public static ViewHolder get(Context context, View convertView, ViewGroup parent, int layoutId, int postion) {        if (convertView == null) {            return new ViewHolder(context, parent, layoutId, postion);        } else {            ViewHolder holder = (ViewHolder)convertView.getTag();            holder.mPostion = postion;            return holder;        }    }    /**     * 通过viewId获取控件     * @param viewId     * @return     */    public <T extends View> T getView(int viewId) {        View view = mViews.get(viewId);        if (view == null) {            view = mConvertView.findViewById(viewId);            mViews.put(viewId, view);        }        return (T) view;    }    public View getConvertView() {        return mConvertView;    }    public ViewHolder setText(int viewId, String text) {        TextView tv = getView(viewId);        tv.setText(text);        return this;    }    public ViewHolder setImageResource(int viewId, int resId) {        ImageView iv = getView(viewId);        iv.setImageResource(resId);        return this;    }    public ViewHolder setImageBitmap(int viewId, Bitmap bm) {        ImageView iv = getView(viewId);        iv.setImageBitmap(bm);        return this;    }}

3. 如何使用我们的CommonAdapter?

package com.stephen.ifishing.adapter;import java.util.List;import com.stephen.ifishing.R;import com.stephen.ifishing.model.ShowFishingItem;import android.content.Context;/** *  * @author Stephen Huang * */public class ShowFishingAdapter extends CommonAdapter<ShowFishingItem> {    public ShowFishingAdapter(Context context, List<ShowFishingItem> itemList) {        super(context, itemList, R.layout.show_fishing);    }    @Override    public void convert(ViewHolder holder, ShowFishingItem bean) {        holder.setText(R.id.tv_user_name, bean.userName)            .setText(R.id.tv_say_something, bean.saySomething)            .setImageResource(R.id.iv_portrait, bean.portraitImageResId);    }}