PillToRefresh上拉下拉Y

最新推荐文章于 2024-09-05 19:16:00 发布

原创最新推荐文章于 2024-09-05 19:16:00 发布 · 440 阅读

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创建工程,导入Library包

File-->new-->Import Module

添加Library的路径,写入name为工程名

在pullToRefreshLibrary库下的build.gradle修改相应版本

compileSdkVersion26

buildToolsVersion "26.0.2"

在自己的App下按F4,选择Dependencice标签，点击加号选择Module dependency,添加Library包

引入成功之后打开项目的project.properties文件查看android.library.reference.1=../Android-PullToRefresh-master/library

主页面

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ptr="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.pulltorefreshdome.MainActivity">

 <!--
    ptr:ptrDrawable="@drawable/default_ptr_flip":刷新时显示的图片
    ptr:ptrAnimationStyle="flip"：刷新的图片以何种方式显示出来
    ptr:ptrHeaderBackground="#383838"：刷新时头部的布局
    ptr:ptrHeaderTextColor="#FFFFFF"：刷新时头部字体的颜色
-->

    <com.handmark.pulltorefresh.library.PullToRefreshListView
        android:id="@+id/pull_lv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        ptr:ptrDrawable="@drawable/default_ptr_flip"
        ptr:ptrAnimationStyle="flip"
        ptr:ptrHeaderBackground="#383838"
        ptr:ptrHeaderTextColor="#FFFFFF"></com.handmark.pulltorefresh.library.PullToRefreshListView>

</RelativeLayout>

list_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="horizontal">

    <ImageView
        android:id="@+id/img"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:src="@mipmap/ic_launcher"/>
    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="234"/>
</LinearLayout>

UsersBean

MainActivity

package com.example.pulltorefreshdome;

import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.ILoadingLayout;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private Handler myHandler = new Handler();
    private PullToRefreshListView plv;
    private List<UsersBean.NewslistBean> list = new ArrayList<>();
    private List<UsersBean.NewslistBean> lists = new ArrayList<>();
    int index=1;
    MyAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        plv = (PullToRefreshListView) findViewById(R.id.plv);
        init();
        initdata();

    }

    public void initdata() {
        index = 1;
        MyTask task = new MyTask(new MyTask.Icallback() {
            @Override
            public void Updatatext(String str) {
                Gson gson = new Gson();
                UsersBean u = gson.fromJson(str, UsersBean.class);
                list = u.getNewslist();
                lists.addAll(list);

                setAdapter();
            }
        });
        task.execute("https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page="+index);
    }

    public void addtoTop() {
        index = 1;
        MyTask task = new MyTask(new MyTask.Icallback() {
            @Override
            public void Updatatext(String str) {
                Gson gson = new Gson();
                UsersBean u = gson.fromJson(str, UsersBean.class);
                list = u.getNewslist();
                lists.addAll(0,list);
            }
        });
        task.execute("https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page="+index);
    }

    public void addtoBottom() {
        index++;
        MyTask task = new MyTask(new MyTask.Icallback() {
            @Override
            public void Updatatext(String str) {
                Gson gson = new Gson();
                UsersBean u = gson.fromJson(str, UsersBean.class);
                list = u.getNewslist();
                lists.addAll(list);
            }
        });
        task.execute("https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page="+index);
    }

    public void init() {
        //设置刷新模式 ，both代表支持上拉和下拉，pull_from_end代表上拉，pull_from_start代表下拉
        plv.setMode(PullToRefreshBase.Mode.BOTH);


/*这里通过getLoadingLayoutProxy 方法来指定上拉和下拉时显示的状态的区别，第一个true 代表下来状态 ，第二个true 代表上拉的状态
如果想区分上拉和下拉状态的不同，可以分别设置*/

        ILoadingLayout startLabels = plv.getLoadingLayoutProxy(true, false);
        startLabels.setPullLabel("下拉刷新");
        startLabels.setRefreshingLabel("正在拉");
        startLabels.setReleaseLabel("放开刷新");


        ILoadingLayout endLabels = plv.getLoadingLayoutProxy(false, true);
        endLabels.setPullLabel("上拉刷新");
        endLabels.setRefreshingLabel("正在载入...");
        endLabels.setReleaseLabel("放开刷新...");


/*如果Mode设置成Mode.BOTH，需要设置刷新Listener为OnRefreshListener2，并实现onPullDownToRefresh()、onPullUpToRefresh()两个方法。
  如果Mode设置成Mode.PULL_FROM_START或Mode.PULL_FROM_END，需要设置刷新Listener为OnRefreshListener，同时实现onRefresh()方法。
  当然也可以设置为OnRefreshListener2，但是Mode.PULL_FROM_START的时候只调用onPullDownToRefresh()方法，Mode.PULL_FROM_END的时候只调用onPullUpToRefresh()方法.

  加载数据完成后 必须 调用下 onRefreshComplete() 完成关闭 header,footer视图
*/
        plv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {//下拉刷新的回调
                //下拉刷新的数据，显示在listview列表的最上面
                addtoTop();
                myHandler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        //刷新完成，必须在异步下完成
                        plv.onRefreshComplete();
                        //刷新适配器
                        setAdapter();
                    }
                }, 1000);
            }

            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {//上拉加载的回调
                //加载更多的数据，添加到集合列表的最后面
                addtoBottom();
                myHandler.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        //刷新完成，必须在异步下完成
                        plv.onRefreshComplete();
                        //刷新适配器
                        setAdapter();
                    }
                }, 1000);
            }
        });
    }

    public void setAdapter() {
        if (adapter == null){
            MyAdapter adapter = new MyAdapter();
            plv.setAdapter(adapter);

        } else {
            adapter.notifyDataSetChanged();
        }
    }

    class MyAdapter extends BaseAdapter {

        @Override
        public int getCount() {
            return list.size();
        }

        @Override
        public Object getItem(int position) {
            return list.get(position);
        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            if (convertView == null) {
                convertView = View.inflate(MainActivity.this, R.layout.list_item, null);
                holder = new ViewHolder();
                holder.img = (ImageView) convertView.findViewById(R.id.img);
                holder.tv = (TextView) convertView.findViewById(R.id.tv);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
                }
            holder.tv.setText(list.get(position).getTitle());
            DisplayImageOptions options = new DisplayImageOptions.Builder()
                    .cacheInMemory(true)//进行内存缓存
                    .cacheOnDisk(true)//进行sd卡缓存
                    .showImageOnLoading(R.drawable.ic_stub) // 设置正在下载中的图片
                    .showImageForEmptyUri(R.drawable.ic_empty) //没有请求地址时
                    .showImageOnFail(R.drawable.ic_error)//下载错误时
                    .bitmapConfig(Bitmap.Config.RGB_565)//设置图片质量
                    .build();

            //第三步：进行加载显示
            ImageLoader.getInstance().displayImage(list.get(position).getPicUrl(), holder.img, options);
            return convertView;
        }

        class ViewHolder {
            ImageView img;
            TextView tv;
        }
    }
}

MyApplication

package com.example.pulltorefreshdome;

import android.app.Application;

import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiskCache;
import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

import java.io.File;

/**
 * Created by ass on 2017/10/19.
 */

public class MyApplication extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        File cacheFile=getExternalCacheDir();
        ImageLoaderConfiguration config=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)//设置内存缓存区大小
                .diskCacheSize(20*1024*1024)//设置sd卡缓存区大小
                .diskCache(new UnlimitedDiskCache(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(config);
    }
}
MyTask

package com.example.pulltorefreshdome;

import android.os.AsyncTask;
import android.util.Log;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * Created by ass on 2017/10/19.
 */

public class MyTask extends AsyncTask<String,Void,String> {
    private Icallback icallback;
    private StringBuilder sb;

    public MyTask(Icallback icallback) {
        this.icallback = icallback;
    }

    @Override
    protected String doInBackground(String... params) {
        try {
            URL url=new URL(params[0]);
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestMethod("GET");
            urlConnection.setReadTimeout(2000);
            urlConnection.setConnectTimeout(2000);
            Log.i("zzz", "醉了"+urlConnection.getResponseCode());
            if(urlConnection.getResponseCode()==200){
                InputStream inputStream = urlConnection.getInputStream();
                sb=new StringBuilder();
                String con;
                BufferedReader br=new BufferedReader(new InputStreamReader(inputStream));
                if((con=br.readLine())!=null){
                    sb.append(con);
                }
                return sb.toString();
            }

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);
        icallback.Updatatext(s);
    }

    public interface Icallback{
        void Updatatext(String str);
    }
}

drawble

ic_empty.xml;ic_error.xml;ic_stub.xml添加<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

</selector>