安卓学习-PullToRefresh-下拉动画效果

第三方开源组件 更新数据时使用

 

 

Music.java

package com.xiaofei.app.pulltorefresh;

/**
 * Created by Goddess on 2016/4/24.
 */
public class Music  {
    private String title;
    private String singer;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getSinger() {
        return singer;
    }

    public void setSinger(String singer) {
        this.singer = singer;
    }

    public Music() {
    }

    public Music(String title, String singer) {
        this.title = title;
        this.singer = singer;
    }
}

MainActivity.java

package com.xiaofei.app.pulltorefresh;

import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.handmark.pulltorefresh.library.ILoadingLayout;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private PullToRefreshListView lv;
    private ArrayList<Music> musics = new ArrayList<>();
    private DataAdapter dataAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv = (PullToRefreshListView) findViewById(R.id.pull_to_refresh_listView);
    /*    lv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener<ListView>() {
            @Override
            public void onRefresh(PullToRefreshBase<ListView> refreshView) {

            }
        });*/

        lv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
                new LoadDataAsyncTask(MainActivity.this).execute();
            }

            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
                new LoadDataAsyncTask(MainActivity.this).execute();
            }
        });
        //上下都可以刷新
        lv.setMode(PullToRefreshBase.Mode.BOTH);
        //设置刷新时显示的文本
        //上面的
        ILoadingLayout startLayout=lv.getLoadingLayoutProxy(true,false);
        startLayout.setPullLabel("正在下拉刷新...");
        startLayout.setRefreshingLabel("正在玩命加载中...");
        startLayout.setReleaseLabel("放开刷新...");
        //下面的
        ILoadingLayout endLayout=lv.getLoadingLayoutProxy(false,true);
        endLayout.setPullLabel("正在上拉刷新...");
        endLayout.setRefreshingLabel("正在玩命加载中...");
        endLayout.setReleaseLabel("放开刷新...");



        loadData();
        dataAdapter = new DataAdapter(this, musics);
        lv.setAdapter(dataAdapter);

    }

    static class LoadDataAsyncTask extends AsyncTask<Void, Void, String> {
        private MainActivity activity;

        public LoadDataAsyncTask(MainActivity mainActivity) {
            this.activity = mainActivity;
        }

        @Override
        protected String doInBackground(Void... params) {
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            activity.loadData();
            return "success";
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            if ("success".equals(s)) {
                activity.dataAdapter.notifyDataSetChanged();//通知数据集发生改变
                activity.lv.onRefreshComplete();//表示刷新完成
            }
        }
    }

    //模拟数据
    private int count = 1;

    private void loadData() {
        for (int i = 0; i < 10; i++) {
            musics.add(new Music("歌曲-" + count, "歌手-" + count));
            count++;
        }
    }

    static class DataAdapter extends BaseAdapter {
        private Context context;
        private ArrayList<Music> musics;

        public DataAdapter(Context context, ArrayList<Music> musics) {
            this.context = context;
            this.musics = musics;
        }

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

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

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder vh;
            if (convertView == null) {
                convertView = LayoutInflater.from(context).inflate(R.layout.list_item, null);
                vh = new ViewHolder();
                vh.tv_title = (TextView) convertView.findViewById(R.id.title);
                vh.tv_singer = (TextView) convertView.findViewById(R.id.singer);
                convertView.setTag(vh);
            }
            vh = (ViewHolder) convertView.getTag();
            Music m = musics.get(position);
            vh.tv_title.setText(m.getTitle());
            vh.tv_singer.setText(m.getSinger());

            return convertView;
        }

        static class ViewHolder {
            TextView tv_title;
            TextView tv_singer;
        }
    }
}

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/title"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/singer"
       android:paddingLeft="16dp"
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@+id/title"
        android:layout_toEndOf="@+id/title" />
</RelativeLayout>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:ptr="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.xiaofei.app.pulltorefresh.MainActivity">


    <com.handmark.pulltorefresh.library.PullToRefreshListView
        android:id="@+id/pull_to_refresh_listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        ptr:ptrDrawable="@drawable/default_ptr_flip"
        ptr:ptrAnimationStyle="flip"
        ptr:ptrHeaderBackground="@android:color/transparent"
        ptr:ptrHeaderTextColor="#919191"
        >

    </com.handmark.pulltorefresh.library.PullToRefreshListView>
</RelativeLayout>