• RecyclerView(替代ListView)使用方法介绍


    在build.gradle文件加入以下代码

     compile 'com.android.support:cardview-v7:21.0.3'
     compile 'com.android.support:recyclerview-v7:21.0.3'

    item类型同样的情况

    布局文件

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:paddingBottom="@dimen/activity_vertical_margin"
                    android:paddingTop="@dimen/activity_vertical_margin">
    
        <android.support.v7.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_centerHorizontal="true"
            android:layout_centerVertical="true"/>
    </RelativeLayout>

    页面代码

    public class OneActivity extends Activity {
        private RecyclerView mRecyclerView;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_one);
    
            mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
            mRecyclerView.setLayoutManager(new LinearLayoutManager(this));//这里用线性显示 相似于listview
    //        mRecyclerView.setLayoutManager(new GridLayoutManager(this, 2));//这里用线性宫格显示 相似于grid view
    //        mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(3, OrientationHelper.VERTICAL));//这里用线性宫格显示 相似于瀑布流
            mRecyclerView.setAdapter(new RecyclerViewAdapter(this));
    
        }
    
        //RecyclerView适配器
        public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
            private Context mContext;
            private LayoutInflater mLayoutInflater;
            private String[] mCityName;
    
            public RecyclerViewAdapter(Context mContext) {
                this.mContext = mContext;
                mLayoutInflater = LayoutInflater.from(mContext);
                mCityName = mContext.getResources().getStringArray(R.array.city_name);
            }
    
            //创建新ViewHolder,被LayoutManager所调用
            @Override
            public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                return new RecyclerViewViewHolder(mLayoutInflater.inflate(R.layout.item_text, parent, false));
            }
    
            //将数据与界面进行绑定的操作
            @Override
            public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
                ((RecyclerViewViewHolder) holder).mTextView.setText(mCityName[position]);
            }
    
            //获取数据的数量
            @Override
            public int getItemCount() {
                return mCityName == null ? 0 : mCityName.length;
            }
    
            //自己定义的ViewHolder,持有每一个Item的的全部界面元素
            public class RecyclerViewViewHolder extends RecyclerView.ViewHolder {
                TextView mTextView;
    
                public RecyclerViewViewHolder(View itemView) {
                    super(itemView);
                    mTextView = (TextView) itemView.findViewById(R.id.tv_city);
                    mTextView.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            ToastUtil.show(mContext, getPosition() + "");
                        }
                    });
                }
            }
        }
    }

    效果图:
    这里写图片描写叙述

    item类型不同的情况

    设配器代码

    //RecyclerView适配器
    public class MultipleRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    
        private Context mContext;
        private LayoutInflater mLayoutInflater;
    
        public static enum ITEM_TYPE {
            ITEM_TYPE_IMAGE, ITEM_TYPE_TEXT
        }
    
        public MultipleRecyclerViewAdapter(Context mContext) {
            this.mContext = mContext;
            mLayoutInflater = LayoutInflater.from(mContext);
        }
    
        //创建新ViewHolder。被LayoutManager所调用
        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            if (viewType == ITEM_TYPE.ITEM_TYPE_TEXT.ordinal()) {
                return new TextViewViewHolder(mLayoutInflater.inflate(R.layout.item_text, parent, false));
            } else {
                return new ImageViewViewHolder(mLayoutInflater.inflate(R.layout.item_image, parent, false));
            }
        }
    
        //将数据与界面进行绑定的操作
        @Override
        public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        }
    
        //获取数据的数量
        @Override
        public int getItemCount() {
            return 10;
        }
    
        //Item类型
        @Override
        public int getItemViewType(int position) {
            return position % 2 == 0 ? ITEM_TYPE.ITEM_TYPE_TEXT.ordinal() : ITEM_TYPE.ITEM_TYPE_IMAGE.ordinal();
        }
    
        //ItemHolder类型一
        public class TextViewViewHolder extends RecyclerView.ViewHolder {
            TextView mTextView;
    
            public TextViewViewHolder(View itemView) {
                super(itemView);
                mTextView = (TextView) itemView.findViewById(R.id.tv_city);
            }
        }
    
        //ItemHolder类型二
        public class ImageViewViewHolder extends RecyclerView.ViewHolder {
            ImageView mImageView;
    
            public ImageViewViewHolder(View itemView) {
                super(itemView);
                mImageView = (ImageView) itemView.findViewById(R.id.iv_city);
            }
        }
    
    }

    效果图:
    这里写图片描写叙述

  • 相关阅读:
    最精简的django程序
    spring+mongo
    从零搭建mongo分片集群的简洁方法
    java对redis的基本操作
    awk输出指定列
    sed输出指定行
    Bash的循环结构(for和while)
    用ffmpeg切割音频文件
    Python判断字符串是否全是字母或数字
    Python函数: any()和all()的用法
  • 原文地址:https://www.cnblogs.com/liguangsunls/p/7251604.html
Copyright © 2020-2023  润新知