listview-requsetdata

//main方法

import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.ListView;import com.example.listview_requestdata.Utils.MyTask;import com.google.gson.Gson;import java.util.List;public class MainActivity extends AppCompatActivity {    private ListView lv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv = (ListView) findViewById(R.id.lv);        //构造MyTask对象，需要传入接口对象        MyTask myTask=new MyTask(new MyTask.Icallbacks() {            @Override            public void updateUiByjson(String jsonstr) {            //进行解析             Gson gson=new Gson();             DataDataBean result = gson.fromJson(jsonstr, DataDataBean.class);             List<DataDataBean.ResultBean.ListBean> datas = result.getResult().getList();                lv.setAdapter(new MyAdapter(MainActivity.this,datas));            }        });        myTask.execute("http://v.juhe.cn/weixin/query?key=88f7bbc507e3ecacfaeab2b47dd8936f&ps=30");    }}

//适配器

public class MyAdapter extends BaseAdapter {    private Context context;    private List<DataDataBean.ResultBean.ListBean> datas;    private int TYTLE_ONLY = 0;//只有文字的形式    private int IMAGE_LEFT = 1;//表示图片在左边,文字在右边    private int IMAGE_RIGHT = 2;//表示图片在右边,文字在左边    private int IMAGE_BOTTOM = 3;//表示文字在上边,图片在下面    private DisplayImageOptions options;    public MyAdapter(Context context, List<DataDataBean.ResultBean.ListBean> datas) {        this.context = context;        this.datas = datas;        options=new DisplayImageOptions.Builder()                .cacheInMemory(true)//使用内存缓存                .cacheOnDisk(true)//使用磁盘缓存                .showImageOnLoading(R.mipmap.ic_launcher)//设置正在下载的图片                .showImageForEmptyUri(R.mipmap.ic_launcher)//url为空或请求的资源不存在时                .showImageOnFail(R.mipmap.ic_launcher)//下载失败时显示的图片                .bitmapConfig(Bitmap.Config.RGB_565)//设置图片格式                .build();    }    @Override    public int getItemViewType(int position) {        if(position%4==0){            return TYTLE_ONLY;        }else if(position%4==1){            return IMAGE_LEFT;        }else if(position%4==2){            return IMAGE_RIGHT;        }        return IMAGE_BOTTOM;    }    @Override    public int getViewTypeCount() {        return 4;    }    @Override    public int getCount() {        return datas.size();    }    @Override    public Object getItem(int position) {        return datas.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        //首先要判断视图要显示的类型        int type=getItemViewType(position);        if(type==TYTLE_ONLY){            ViewHolder holder;            if(convertView==null){                convertView=View.inflate(context,R.layout.item_title_layout,null);                holder=new ViewHolder();                holder.tvTitle=(TextView) convertView.findViewById(R.id.text_title);                convertView.setTag(holder);            }else{                holder=(ViewHolder) convertView.getTag();            }            holder.tvTitle.setText(datas.get(position).getTitle());        }else if(type==IMAGE_LEFT){            ViewHolderLeft holder;            if(convertView==null){                convertView=View.inflate(context,R.layout.item_left_layout,null);                holder=new ViewHolderLeft();                holder.tvTitle=(TextView) convertView.findViewById(R.id.text_title);                holder.imageView= (ImageView) convertView.findViewById(R.id.image_view);                convertView.setTag(holder);            }else{                holder=(ViewHolderLeft) convertView.getTag();            }            holder.tvTitle.setText(datas.get(position).getTitle());            //异步请求图片            ImageLoader.getInstance().displayImage(datas.get(position).getFirstImg(),holder.imageView,options);        }else if(type==IMAGE_RIGHT){            ViewHolderRight holder;            if(convertView==null){                convertView=View.inflate(context,R.layout.item_right_layout,null);                holder=new ViewHolderRight();                holder.tvTitle=(TextView) convertView.findViewById(R.id.text_title);                holder.imageView= (ImageView) convertView.findViewById(R.id.image_view);                convertView.setTag(holder);            }else{                holder=(ViewHolderRight) convertView.getTag();            }            holder.tvTitle.setText(datas.get(position).getTitle());            //异步请求图片            ImageLoader.getInstance().displayImage(datas.get(position).getFirstImg(),holder.imageView,options);        }else{            ViewHolderBottom holder;            if(convertView==null){                convertView=View.inflate(context,R.layout.item_bottom_layyout,null);                holder=new ViewHolderBottom();                holder.tvTitle=(TextView) convertView.findViewById(R.id.text_title);                holder.imageView= (ImageView) convertView.findViewById(R.id.image_view);                convertView.setTag(holder);            }else{                holder=(ViewHolderBottom) convertView.getTag();            }            holder.tvTitle.setText(datas.get(position).getTitle());            //异步请求图片            ImageLoader.getInstance().displayImage(datas.get(position).getFirstImg(),holder.imageView,options);        }        return convertView;    }    class  ViewHolder{        TextView tvTitle;    }    class ViewHolderLeft{        TextView tvTitle;        ImageView imageView;    }    class ViewHolderRight{        TextView tvTitle;        ImageView imageView;    }    class ViewHolderBottom{        TextView tvTitle;        ImageView imageView;    }}

//Bean包解析的数据

public class DataDataBean {    /**     * reason : 请求成功     * result : {"list":[{"id":"wechat_20171012061068","title":"佛教中的十大真理 一条比一条经典","source":"腾讯佛学","firstImg":"http://zxpic.gtimg.com/infonew/0/wechat_pics_-28269253.jpg/640","mark":"","url":"http://v.juhe.cn/weixin/redirect?wid=wechat_20171012061068"},{"id":"wechat_20171012060989","title":"善付嘱丨印光大师：佛留舍利 广度众生","source":"腾讯佛学","firstImg":"http://zxpic.gtimg.com/infonew/0/wechat_pics_-28269253.jpg/640","mark":"","url":"http://v.juhe.cn/weixin/redirect?wid=wechat_20171012060989"},{"id":"wechat_20171012061352","title":"臧跃军的\u201c心灵佛光\u201d研究\u2014\u2014高原梵呗","source":"艺得油画","firstImg":"http://zxpic.gtimg.com/infonew/0/wechat_pics_-53594150.static/640","mark":"","url":"http://v.juhe.cn/weixin/redirect?wid=wechat_20171012061352"},{"id":"wechat_20171012061878","title":"女人与女人最大的区别，不是相貌，而是味道 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    * error_code : 0     */    private String reason;    private ResultBean result;    private int error_code;    public String getReason() {        return reason;    }    public void setReason(String reason) {        this.reason = reason;    }    public ResultBean getResult() {        return result;    }    public void setResult(ResultBean result) {        this.result = result;    }    public int getError_code() {        return error_code;    }    public void setError_code(int error_code) {        this.error_code = error_code;    }    public static class ResultBean {        /**         * list : [{"id":"wechat_20171012061068","title":"佛教中的十大真理 一条比一条经典","source":"腾讯佛学","firstImg":"http://zxpic.gtimg.com/infonew/0/wechat_pics_-28269253.jpg/640","mark":"","url":"http://v.juhe.cn/weixin/redirect?wid=wechat_20171012061068"},{"id":"wechat_20171012060989","title":"善付嘱丨印光大师：佛留舍利 广度众生","source":"腾讯佛学","firstImg":"http://zxpic.gtimg.com/infonew/0/wechat_pics_-28269253.jpg/640","mark":"","url":"http://v.juhe.cn/weixin/redirect?wid=wechat_20171012060989"},{"id":"wechat_20171012061352","title":"臧跃军的\u201c心灵佛光\u201d研究\u2014\u2014高原梵呗","source":"艺得油画","firstImg":"http://zxpic.gtimg.com/infonew/0/wechat_pics_-53594150.static/640","mark":"","url":"http://v.juhe.cn/weixin/redirect?wid=wechat_20171012061352"},{"id":"wechat_20171012061878","title":"女人与女人最大的区别，不是相貌，而是味道 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        * totalPage : 5344         * ps : 30         * pno : 1         */        private int totalPage;        private int ps;        private int pno;        private List<ListBean> list;        public int getTotalPage() {            return totalPage;        }        public void setTotalPage(int totalPage) {            this.totalPage = totalPage;        }        public int getPs() {            return ps;        }        public void setPs(int ps) {            this.ps = ps;        }        public int getPno() {            return pno;        }        public void setPno(int pno) {            this.pno = pno;        }        public List<ListBean> getList() {            return list;        }        public void setList(List<ListBean> list) {            this.list = list;        }        public static class ListBean {            /**             * id : wechat_20171012061068             * title : 佛教中的十大真理 一条比一条经典             * source : 腾讯佛学             * firstImg : http://zxpic.gtimg.com/infonew/0/wechat_pics_-28269253.jpg/640             * mark :             * url : http://v.juhe.cn/weixin/redirect?wid=wechat_20171012061068             */            private String id;            private String title;            private String source;            private String firstImg;            private String mark;            private String url;            public String getId() {                return id;            }            public void setId(String id) {                this.id = id;            }            public String getTitle() {                return title;            }            public void setTitle(String title) {                this.title = title;            }            public String getSource() {                return source;            }            public void setSource(String source) {                this.source = source;            }            public String getFirstImg() {                return firstImg;            }            public void setFirstImg(String firstImg) {                this.firstImg = firstImg;            }            public String getMark() {                return mark;            }            public void setMark(String mark) {                this.mark = mark;            }            public String getUrl() {                return url;            }            public void setUrl(String url) {                this.url = url;            }        }    }}

//工具类

public class MyApplication extends Application {    @Override    public void onCreate() {        super.onCreate();        File cachefile = getExternalCacheDir();        ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(this)                .memoryCacheExtraOptions(480, 800)//缓存图片最大的长和宽                .threadPoolSize(2)//线程池的数量                .threadPriority(4)                .memoryCacheSize(2 * 1024 * 1024)                .memoryCacheSize(2 * 1024 * 1024)//设置内存缓存区大小                .diskCacheSize(20 * 1024 * 1024)//设置sd卡缓存区大小                .diskCache(new UnlimitedDiscCache(cachefile))//自定义缓存目录                .writeDebugLogs()//打印日志内容                .diskCacheFileNameGenerator(new Md5FileNameGenerator())//给缓存的文件名进行md5加密处理                .build();        ImageLoader.getInstance().init(configuration);    }}

activity-main

<?xml version="1.0" encoding="utf-8"?><RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.listview_requestdata.MainActivity">    <ListView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/lv"        ></ListView></RelativeLayout>

//item

<?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:orientation="vertical"    >    <TextView        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:id="@+id/tv_title"        />    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/img"        /></LinearLayout>

//bottom_layout

<?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:orientation="vertical"    >    <TextView        android:id="@+id/text_title"        android:layout_width="match_parent"        android:layout_height="wrap_content" />    <ImageView        android:id="@+id/image_view"        android:layout_width="match_parent"        android:layout_height="200dp" /></LinearLayout>

left_layout

<?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"    >    <ImageView        android:id="@+id/image_view"        android:layout_width="100dp"        android:layout_height="100dp" />    <TextView        android:id="@+id/text_title"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

right_layout

<?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"    >    <TextView        android:id="@+id/text_title"        android:layout_width="0dp"        android:layout_weight="1"        android:layout_height="wrap_content" />    <ImageView        android:id="@+id/image_view"        android:layout_width="100dp"        android:layout_height="100dp" /></LinearLayout>

title_layout

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

//要加的权限

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

android:name=".MyApplication"