RxJava+MVP+轮播+retrofit+条目点击+recyclerView

//布局

参考博客:https://www.cnblogs.com/cainiaodongdong/p/7880723.html

推荐博客下载完播放视频:http://m.blog.csdn.net/c_bulrush/article/details/78611097

//主布局

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.bwei.test.lx_week_three.activity.MainActivity">

    <com.youth.banner.Banner
        android:id="@+id/banner"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true">

    com.youth.banner.Banner>
    <RelativeLayout
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_below="@+id/banner"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="wrap_content"
            android:text="免费试听"
            android:textSize="20sp"
            android:layout_marginLeft="10dp"
            android:layout_height="wrap_content" />
        <TextView
            android:layout_width="wrap_content"
            android:text="查看全部"
            android:layout_alignParentRight="true"
            android:layout_marginRight="10dp"
            android:textSize="20sp"
            android:layout_height="wrap_content" />
    RelativeLayout>
    <android.support.v7.widget.RecyclerView
        android:id="@+id/rlv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/title">
    android.support.v7.widget.RecyclerView>
RelativeLayout>

//item

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"
    xmlns:fresco="http://schemas.android.com/apk/res-auto">
    <com.facebook.drawee.view.SimpleDraweeView
        android:id="@+id/my_image_view"
        android:layout_width="130dp"
        android:layout_height="130dp"
        fresco:placeholderImage="@mipmap/ic_launcher"
        />
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_toRightOf="@+id/my_image_view"
        android:layout_height="130dp">
        <TextView
            android:id="@+id/tv_title"
            android:layout_width="match_parent"
            android:padding="20dp"
            android:layout_height="wrap_content" />

        <TextView
            android:id="@+id/tv_other"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:layout_below="@+id/tv_title"
            android:padding="20dp" />
    RelativeLayout>
RelativeLayout>

//主类

public class MainActivity extends BaseActivity implements IHomeView {
    private Banner mBanner;
    private RelativeLayout mTitle;
    private RecyclerView mRlv;
    List list;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Fresco.initialize(this);
        initView();
        presenter.show();
    }

    private void initView() {
        mBanner = (Banner) findViewById(R.id.banner);
        mTitle = (RelativeLayout) findViewById(R.id.title);
        mRlv = (RecyclerView) findViewById(R.id.rlv);
        list=new ArrayList<>();
    }

    @Override
    protected void createPresnter() {
        presenter=new HomePresenter(this);
    }

    @Override
    protected void init() {

    }

    @Override
    protected void onStart() {
        super.onStart();
        mBanner.startAutoPlay();
    }

    @Override
    protected void onStop() {
        super.onStop();
        mBanner.stopAutoPlay();
    }

    @Override
    public void showData(final Bean bean) {
        for (int i = 0; i list.add(bean.getData().get(i).getImage_url());
            Log.i("=============", "showData: "+list.toString());
        }
        mBanner.setImageLoader(new GlideImageLoader());
        mBanner.setImages(list);
        mBanner.start();
        //展示RecyclerView数据
        mRlv.setLayoutManager(new LinearLayoutManager(this));
        MyRecyclerViewAdapter myRecyclerViewAdapter = new MyRecyclerViewAdapter(this, bean);
        mRlv.setAdapter(myRecyclerViewAdapter);
        myRecyclerViewAdapter.setOnItemClickListener(new MyRecyclerViewAdapter.onItemClickListener() {
            @Override
            public void OnItemClick(View view, int position) {
                String vedio_url = bean.getData().get(position).getVedio_url();
                Intent intent=new Intent(MainActivity.this,OtherActivity.class);
                intent.putExtra("vedio_url",vedio_url);
                startActivity(intent);
            }
        });
    }

//适配器

public class MyRecyclerViewAdapter extends RecyclerView.Adapter{
    Context context;
    Bean bean;

    public MyRecyclerViewAdapter(Context context, Bean bean) {
        this.context = context;
        this.bean = bean;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view=View.inflate(context,R.layout.item,null);
        view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.OnItemClick(view, (Integer) view.getTag());
            }
        });
        MyViewHolder holder=new MyViewHolder(view);

        return holder;
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        holder.tv.setText(bean.getData().get(position).getTitle());
        holder.tv2.setText(bean.getData().get(position).getContent());
        holder.sdw.setController(Fresco.newDraweeControllerBuilder().setUri(bean.getData().get(position).getImage_url()).build());
        holder.itemView.setTag(position);
    }

    @Override
    public int getItemCount() {
        return bean.getData() == null ? 0 : bean.getData().size();
    }
    onItemClickListener listener;
    public void setOnItemClickListener(onItemClickListener listener){
        this.listener=listener;
    }
    public interface onItemClickListener {
        void OnItemClick(View view, int position);
    }
    class MyViewHolder extends RecyclerView.ViewHolder {
        SimpleDraweeView sdw;
        TextView tv, tv2;

        public MyViewHolder(View itemView) {
            super(itemView);
            sdw = itemView.findViewById(R.id.my_image_view);
            tv = itemView.findViewById(R.id.tv_title);
            tv2 = itemView.findViewById(R.id.tv_other);
        }
    }

//BaseActivity

public abstract class BaseActivity <T extends IPresenter> extends AppCompatActivity {
    public T presenter;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        createPresnter();
    }

    protected abstract void createPresnter();
    protected abstract void init();

}

//

BaseService

public class BaseService {
    private static OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

    private static Retrofit.Builder builder =
            new Retrofit.Builder()
                    .baseUrl("http://result.eolinker.com/")
                    .addConverterFactory(GsonConverterFactory.create())
                    .addCallAdapterFactory(RxJava2CallAdapterFactory.create());

    public static <S> S createService(Class<S> serviceClass) {
        Retrofit retrofit = builder.client(httpClient.build()).build();
        return retrofit.create(serviceClass);
    }
}

//Bean

public class Bean {
    /**
     * code : 200
     * data : [{"content":"习近平举行仪式欢迎加蓬总统访华","id":10000,"image_url":"http://pic32.nipic.com/20130817/9745430_101836881000_2.jpg","title":"今日头条","type":1,"vedio_url":"http://2449.vod.myqcloud.com/2449_bfbbfa3cea8f11e5aac3db03cda99974.f20.mp4"},{"content":"习近平举行仪式欢迎加蓬总统访华","id":10001,"image_url":"http://pic15.nipic.com/20110630/6322714_105943746342_2.jpg","title":"往期故事","type":2,"vedio_url":"https://wdl.wallstreetcn.com/41aae4d2-390a-48ff-9230-ee865552e72d"},{"content":"这个市的书记市长双双被约谈 引发震动","id":10002,"image_url":"http://pic48.nipic.com/file/20140916/2531170_195153248000_2.jpg","title":"讨论天下","type":3,"vedio_url":"http://video.jiecao.fm/5/1/%E8%87%AA%E5%8F%96%E5%85%B6%E8%BE%B1.mp4"},{"content":"\u201c乔丹\u201d商标是否侵权 4年官司迎最高法判决 调查","id":10003,"image_url":"http://img.taopic.com/uploads/allimg/140626/240469-1406261S24553.jpg","title":"我的珍爱","type":4,"vedio_url":"http://2449.vod.myqcloud.com/2449_bfbbfa3cea8f11e5aac3db03cda99974.f20.mp4"},{"content":"黑龙江稻农收入暴涨组团进城买房 有人买十多套","id":10004,"image_url":"http://pic77.nipic.com/file/20150911/21721561_155058651000_2.jpg","title":"我的未来","type":5,"vedio_url":"http://video.jiecao.fm/5/1/%E8%87%AA%E5%8F%96%E5%85%B6%E8%BE%B1.mp4"},{"content":"印尼6.4级地震致97死 专家称当地防震意识差","id":10005,"image_url":"http://img4.duitang.com/uploads/item/201603/18/20160318103156_cziuY.jpeg","title":"东芝","type":6,"vedio_url":"http://ips.ifeng.com/video19.ifeng.com/video09/2014/06/16/1989823-102-086-0009.mp4"}]
     * msg : 成功
     */

    private int code;
    private String msg;
    private List data;

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public List getData() {
        return data;
    }

    public void setData(List data) {
        this.data = data;
    }

    public static class DataBean {
        /**
         * content : 习近平举行仪式欢迎加蓬总统访华
         * id : 10000
         * image_url : http://pic32.nipic.com/20130817/9745430_101836881000_2.jpg
         * title : 今日头条
         * type : 1
         * vedio_url : http://2449.vod.myqcloud.com/2449_bfbbfa3cea8f11e5aac3db03cda99974.f20.mp4
         */

        private String content;
        private int id;
        private String image_url;
        private String title;
        private int type;
        private String vedio_url;

        public String getContent() {
            return content;
        }

        public void setContent(String content) {
            this.content = content;
        }

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getImage_url() {
            return image_url;
        }

        public void setImage_url(String image_url) {
            this.image_url = image_url;
        }

        public String getTitle() {
            return title;
        }

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

        public int getType() {
            return type;
        }

        public void setType(int type) {
            this.type = type;
        }

        public String getVedio_url() {
            return vedio_url;
        }

        public void setVedio_url(String vedio_url) {
            this.vedio_url = vedio_url;
        }
    }
}

//M层

public interface IHomeModel {
    void getData(HomeCallback callback);
    interface HomeCallback{
        void homeComplete(Bean bean);
    }
}

public class HomeModel implements IHomeModel{
    @Override
    public void getData(final HomeCallback callback) {
        BaseService.createService(GetInterface.class).getData_Banner()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Observer() {
                    @Override
                    public void onSubscribe(Disposable d) {

                    }

                    @Override
                    public void onNext(Bean bean) {
                        callback.homeComplete(bean);
                    }

                    @Override
                    public void onError(Throwable e) {

                    }

                    @Override
                    public void onComplete() {

                    }
                });
    }
}

//View层

public interface IHomeView {
    void showData(Bean bean);
}

//Presenter层

public interface IPresenter<T> {
    void attch(T view);
    void disattch();
}

public class HomePresenter implements IPresenter{
    IHomeModel model;
    SoftReference srf;
    public HomePresenter(IHomeView view) {
        model = new HomeModel();
        attch(view);
    }
       public void show(){
           model.getData(new IHomeModel.HomeCallback() {
               @Override
               public void homeComplete(Bean bean) {
                   srf.get().showData(bean);
               }
           });
       }

    @Override
    public void attch(IHomeView view) {
        srf = new SoftReference(view);
    }

    @Override
    public void disattch() {
        srf =null;
    }
}

//retrofit

public interface GetInterface {
    @GET("iYXEPGn4e9c6dafce6e5cdd23287d2bb136ee7e9194d3e9?uri=vedio")
    Observable getData_Banner();
    /* @Streaming*//*大文件需要加入这个判断，防止下载过程中写入到内存中*//*
    @GET
    Observable download(@Header("RANGE") String start, @Url String url);*/
    @Streaming
    @GET
    Observable download(@Header("RANGE") String start, @Url String url);
}

utils

public class GlideImageLoader extends ImageLoader {
    @Override
    public void displayImage(Context context, Object path, ImageView imageView) {
        Glide.with(context).load(path).into(imageView);
    }
}

//build.gradle

apply plugin: 'com.android.application'
apply plugin: 'org.greenrobot.greendao'
android {
    compileSdkVersion 26
    buildToolsVersion "26.0.1"
    defaultConfig {
        applicationId "com.bwei.test.lx_week_three"
        minSdkVersion 15
        targetSdkVersion 26
        multiDexEnabled true
        versionCode 1
        versionName "1.0"
        //testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    //Gson converter
    //RxJava2 Adapter
    //compile files('libs/okhttp-3.9.0.jar')
    compile 'com.android.support:appcompat-v7:26.+'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'
    compile 'com.youth.banner:banner:1.4.9'
    compile 'com.facebook.fresco:fresco:0.11.0'
    compile 'io.reactivex.rxjava2:rxjava:2.1.1'
    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
    compile 'com.squareup.retrofit2:retrofit:2.2.0'
    compile 'com.squareup.retrofit2:converter-gson:2.2.0'
    compile 'com.squareup.retrofit2:adapter-rxjava2:2.2.0'
    compile 'com.github.bumptech.glide:glide:3.7.0'
    compile 'org.greenrobot:greendao:3.2.0'
    testCompile 'junit:junit:4.12'
}

//在外部的依赖中加入

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.1'
        classpath 'org.greenrobot:greendao-gradle-plugin:3.2.1'
    }
}

//OtherActivity布局

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.bwei.test.lx_week_three.activity.OtherActivity">
    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="23dp"
        android:layout_marginStart="23dp"
        android:layout_marginTop="18dp"
        android:text="TextView" />

    <ProgressBar
        android:id="@+id/progressBar"
        style="?android:attr/progressBarStyleHorizontal"
        android:layout_width="fill_parent"
        android:layout_height="7.5dp"
        android:layout_below="@+id/textView"
        android:layout_marginRight="8dp"
        android:max="100"
        android:progress="100"
        android:visibility="visible" />

    <Button
        android:id="@+id/start"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_toEndOf="@+id/textView"
        android:layout_toRightOf="@+id/textView"
        android:text="下载" />


    <Button
        android:id="@+id/delete"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginLeft="48dp"
        android:layout_marginStart="48dp"
        android:layout_toEndOf="@+id/start"
        android:layout_toRightOf="@+id/start"
        android:text="暂停" />

RelativeLayout>

//Other类

public class OtherActivity extends AppCompatActivity {
    private static final String TAG = MainActivity.class.getSimpleName();
    private ProgressBar mProgressBar;
    private Button start;
    private Button pause;


    private TextView total;
    private int max;
    private DownloadUtil mDownloadUtil;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_other);
        total = (TextView) findViewById(R.id.textView);
        start = (Button) findViewById(R.id.start);
        pause = (Button) findViewById(R.id.delete);
        mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
        Intent intent=getIntent();
        String urlString = intent.getStringExtra("vedio_url");

//        String urlString = "http://2449.vod.myqcloud.com/2449_22ca37a6ea9011e5acaaf51d105342e3.f20.mp4";
        String localPath = getCacheDir() + "/local2";
        mDownloadUtil = new DownloadUtil(2, localPath, "adc.mp4", urlString,
                this);
        mDownloadUtil.setOnDownloadListener(new DownloadUtil.OnDownloadListener() {

            @Override
            public void downloadStart(int fileSize) {
                // TODO Auto-generated method stub
                Log.w(TAG, "fileSize::" + fileSize);
                max = fileSize;
                mProgressBar.setMax(fileSize);
            }

            @Override
            public void downloadProgress(int downloadedSize) {
                // TODO Auto-generated method stub
                Log.w(TAG, "Compelete::" + downloadedSize);
                mProgressBar.setProgress(downloadedSize);
                total.setText((int) downloadedSize * 100 / max + "%");
            }

            @Override
            public void downloadEnd() {
                // TODO Auto-generated method stub
                Log.w(TAG, "ENd");
            }
        });
        start.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                mDownloadUtil.start();
            }
        });
        pause.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                mDownloadUtil.pause();
            }
        });


    }

//多线程断点下载所用

四个类

public class DownlaodSqlTool {
    /**
     * 创建下载的具体信息
     */
    public void insertInfos(List infos) {
        for (DownloadInfo info : infos) {
            User user = new User(null, info.getThreadId(), info.getStartPos(), info.getEndPos(), info.getCompeleteSize(), info.getUrl());
            userDao.insert(user);
        }
    }

    /**
     * 得到下载具体信息
     */
    public List getInfos(String urlstr) {
        List list = new ArrayList();
        List list1 = userDao.queryBuilder().where(UserDao.Properties.Url.eq(urlstr)).build().list();
        for (User user : list1) {
            DownloadInfo infoss = new DownloadInfo(
                    user.getThread_id(), user.getStart_pos(), user.getEnd_pos(),
                    user.getCompelete_size(), user.getUrl());
            Log.d("main-----", infoss.toString());
            list.add(infoss);
        }

        return list;
    }

    /**
     * 更新数据库中的下载信息
     */
    public void updataInfos(int threadId, int compeleteSize, String urlstr) {
        User user = userDao.queryBuilder()
                .where(UserDao.Properties.Thread_id.eq(threadId), UserDao.Properties.Url.eq(urlstr)).build().unique();
        user.setCompelete_size(compeleteSize);
        userDao.update(user);
    }

    /**
     * 下载完成后删除数据库中的数据
     */
    public void delete(String url) {
        userDao.deleteAll();
    }
}

public class DownloadHttpTool {
    /**
     * 利用Http协议进行多线程下载具体实践类
     */

    private static final String TAG = DownloadHttpTool.class.getSimpleName();
    private int threadCount;//线程数量
    private String urlstr;//URL地址
    private Context mContext;
    private Handler mHandler;
    private List downloadInfos;//保存下载信息的类

    private String localPath;//目录
    private String fileName;//文件名
    private int fileSize;
    private DownlaodSqlTool sqlTool;//文件信息保存的数据库操作类

    private enum Download_State {
        Downloading, Pause, Ready;//利用枚举表示下载的三种状态
    }

    private Download_State state = Download_State.Ready;//当前下载状态

    private int globalCompelete = 0;//所有线程下载的总数

    public DownloadHttpTool(int threadCount, String urlString,
                            String localPath, String fileName, Context context, Handler handler) {
        super();
        this.threadCount = threadCount;
        this.urlstr = urlString;
        this.localPath = localPath;
        this.mContext = context;
        this.mHandler = handler;
        this.fileName = fileName;
        sqlTool = new DownlaodSqlTool();
    }

    //在开始下载之前需要调用ready方法进行配置
    public void ready() {
        Log.w(TAG, "ready");
        globalCompelete = 0;
        downloadInfos = sqlTool.getInfos(urlstr);
        if (downloadInfos.size() == 0) {
            initFirst();
        } else {
            File file = new File(localPath + "/" + fileName);
            if (!file.exists()) {
                sqlTool.delete(urlstr);
                initFirst();
            } else {
                fileSize = downloadInfos.get(downloadInfos.size() - 1)
                        .getEndPos();
                for (DownloadInfo info : downloadInfos) {
                    globalCompelete += info.getCompeleteSize();
                }
                Log.w(TAG, "globalCompelete:::" + globalCompelete);
            }
        }
    }

    public void start() {
        Log.w(TAG, "start");
        if (downloadInfos != null) {
            if (state == Download_State.Downloading) {
                return;
            }
            state = Download_State.Downloading;
            for (DownloadInfo info : downloadInfos) {
                Log.v(TAG, "startThread");
                new DownloadThread(info.getThreadId(), info.getStartPos(),
                        info.getEndPos(), info.getCompeleteSize(),
                        info.getUrl()).start();
            }
        }
    }

    public void pause() {
        state = Download_State.Pause;
    }

    public void delete() {
        compelete();
        File file = new File(localPath + "/" + fileName);
        file.delete();
    }

    public void compelete() {
        sqlTool.delete(urlstr);
    }

    public int getFileSize() {
        return fileSize;
    }

    public int getCompeleteSize() {
        return globalCompelete;
    }

    //第一次下载初始化
    private void initFirst() {
        Log.w(TAG, "initFirst");
        try {
            URL url = new URL(urlstr);
            HttpURLConnection connection = (HttpURLConnection) url
                    .openConnection();
            connection.setConnectTimeout(5000);
            connection.setRequestMethod("GET");
            fileSize = connection.getContentLength();
            Log.w(TAG, "fileSize::" + fileSize);
            File fileParent = new File(localPath);
            if (!fileParent.exists()) {
                fileParent.mkdir();
            }
            File file = new File(fileParent, fileName);
            if (!file.exists()) {
                file.createNewFile();
            }
            // 本地访问文件
            RandomAccessFile accessFile = new RandomAccessFile(file, "rwd");
            accessFile.setLength(fileSize);
            accessFile.close();
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
        int range = fileSize / threadCount;
        downloadInfos = new ArrayList();
        for (int i = 0; i < threadCount - 1; i++) {
            DownloadInfo info = new DownloadInfo(i, i * range, (i + 1) * range
                    - 1, 0, urlstr);
            downloadInfos.add(info);
        }
        DownloadInfo info = new DownloadInfo(threadCount - 1, (threadCount - 1)
                * range, fileSize - 1, 0, urlstr);
        downloadInfos.add(info);
        sqlTool.insertInfos(downloadInfos);
    }

    //自定义下载线程
    private class DownloadThread extends Thread {

        private int threadId;
        private int startPos;
        private int endPos;
        private int compeleteSize;
        private String urlstr;
        private int totalThreadSize;

        public DownloadThread(int threadId, int startPos, int endPos,
                              int compeleteSize, String urlstr) {
            this.threadId = threadId;
            this.startPos = startPos;
            this.endPos = endPos;
            totalThreadSize = endPos - startPos + 1;
            this.urlstr = urlstr;
            this.compeleteSize = compeleteSize;
        }

        @Override
        public void run() {
            HttpURLConnection connection = null;
            RandomAccessFile randomAccessFile = null;
            InputStream is = null;
            try {
                randomAccessFile = new RandomAccessFile(localPath + "/"
                        + fileName, "rwd");
                randomAccessFile.seek(startPos + compeleteSize);
                URL url = new URL(urlstr);
                connection = (HttpURLConnection) url.openConnection();
                connection.setConnectTimeout(5000);
                connection.setRequestMethod("GET");
                connection.setRequestProperty("Range", "bytes="
                        + (startPos + compeleteSize) + "-" + endPos);
                is = connection.getInputStream();
                byte[] buffer = new byte[1024];
                int length = -1;
                while ((length = is.read(buffer)) != -1) {
                    randomAccessFile.write(buffer, 0, length);
                    compeleteSize += length;
                    Message message = Message.obtain();
                    message.what = threadId;
                    message.obj = urlstr;
                    message.arg1 = length;
                    mHandler.sendMessage(message);
                    sqlTool.updataInfos(threadId, compeleteSize, urlstr);
                    Log.w(TAG, "Threadid::" + threadId + "    compelete::"
                            + compeleteSize + "    total::" + totalThreadSize);
                    if (compeleteSize >= totalThreadSize) {
                        break;
                    }
                    if (state != Download_State.Downloading) {
                        break;
                    }
                }

            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                try {
                    if (is != null) {
                        is.close();
                    }
                    randomAccessFile.close();
                    connection.disconnect();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

public class DownloadInfo {
    /**
     * 保存每个下载线程下载信息类
     *
     */

    private int threadId;// 下载器id
    private int startPos;// 开始点
    private int endPos;// 结束点
    private int compeleteSize;// 完成度
    private String url;// 下载文件的URL地址

    public DownloadInfo(int threadId, int startPos, int endPos,
                        int compeleteSize, String url) {
        this.threadId = threadId;
        this.startPos = startPos;
        this.endPos = endPos;
        this.compeleteSize = compeleteSize;
        this.url = url;
    }

    public DownloadInfo() {
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public int getThreadId() {
        return threadId;
    }

    public void setThreadId(int threadId) {
        this.threadId = threadId;
    }

    public int getStartPos() {
        return startPos;
    }

    public void setStartPos(int startPos) {
        this.startPos = startPos;
    }

    public int getEndPos() {
        return endPos;
    }

    public void setEndPos(int endPos) {
        this.endPos = endPos;
    }

    public int getCompeleteSize() {
        return compeleteSize;
    }

    public void setCompeleteSize(int compeleteSize) {
        this.compeleteSize = compeleteSize;
    }

    @Override
    public String toString() {
        return "DownloadInfo [threadId=" + threadId + ", startPos=" + startPos
                + ", endPos=" + endPos + ", compeleteSize=" + compeleteSize
                + "]";
    }

}

public class DownloadUtil {
    private DownloadHttpTool mDownloadHttpTool;
    private OnDownloadListener onDownloadListener;

    private int fileSize;
    private int downloadedSize = 0;

    @SuppressLint("HandlerLeak")
    private Handler mHandler = new Handler() {

        @Override
        public void handleMessage(Message msg) {
            // TODO Auto-generated method stub
            super.handleMessage(msg);
            int length = msg.arg1;
            synchronized (this) {//加锁保证已下载的正确性
                downloadedSize += length;
            }
            if (onDownloadListener != null) {
                onDownloadListener.downloadProgress(downloadedSize);
            }
            if (downloadedSize >= fileSize) {
                mDownloadHttpTool.compelete();
                if (onDownloadListener != null) {
                    onDownloadListener.downloadEnd();
                }
            }
        }

    };

    public DownloadUtil(int threadCount, String filePath, String filename,
                        String urlString, Context context) {

        mDownloadHttpTool = new DownloadHttpTool(threadCount, urlString,
                filePath, filename, context, mHandler);
    }

    //下载之前首先异步线程调用ready方法获得文件大小信息，之后调用开始方法
    public void start() {
        new AsyncTask() {

            @Override
            protected Void doInBackground(Void... arg0) {
                // TODO Auto-generated method stub
                mDownloadHttpTool.ready();
                return null;
            }

            @Override
            protected void onPostExecute(Void result) {
                // TODO Auto-generated method stub
                super.onPostExecute(result);
                fileSize = mDownloadHttpTool.getFileSize();
                downloadedSize = mDownloadHttpTool.getCompeleteSize();
                Log.w("Tag", "downloadedSize::" + downloadedSize);
                if (onDownloadListener != null) {
                    onDownloadListener.downloadStart(fileSize);
                }
                mDownloadHttpTool.start();
            }
        }.execute();
    }

    public void pause() {
        mDownloadHttpTool.pause();
    }

    public void delete(){
        mDownloadHttpTool.delete();
    }

    public void reset(){
        mDownloadHttpTool.delete();
        start();
    }

    public void setOnDownloadListener(OnDownloadListener onDownloadListener) {
        this.onDownloadListener = onDownloadListener;
    }

    //下载回调接口
    public interface OnDownloadListener {
        public void downloadStart(int fileSize);

        public void downloadProgress(int downloadedSize);//记录当前所有线程下总和

        public void downloadEnd();
    }
}

UserBean

@Entity
public class User {
    @Id
    private Long id;
    private Integer thread_id;
    private Integer start_pos;
    private Integer end_pos;
    private Integer compelete_size;
    private String url;
    @Generated(hash = 2041931179)
    public User(Long id, Integer thread_id, Integer start_pos, Integer end_pos,
            Integer compelete_size, String url) {
        this.id = id;
        this.thread_id = thread_id;
        this.start_pos = start_pos;
        this.end_pos = end_pos;
        this.compelete_size = compelete_size;
        this.url = url;
    }
    @Generated(hash = 586692638)
    public User() {
    }
    public Long getId() {
        return this.id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public Integer getThread_id() {
        return this.thread_id;
    }
    public void setThread_id(Integer thread_id) {
        this.thread_id = thread_id;
    }
    public Integer getStart_pos() {
        return this.start_pos;
    }
    public void setStart_pos(Integer start_pos) {
        this.start_pos = start_pos;
    }
    public Integer getEnd_pos() {
        return this.end_pos;
    }
    public void setEnd_pos(Integer end_pos) {
        this.end_pos = end_pos;
    }
    public Integer getCompelete_size() {
        return this.compelete_size;
    }
    public void setCompelete_size(Integer compelete_size) {
        this.compelete_size = compelete_size;
    }
    public String getUrl() {
        return this.url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
}

//节操播放

compile 'fm.jiecao:jiecaovideoplayer:4.8.3'

<fm.jiecao.jcvideoplayer_lib.JCVideoPlayerStandard
    android:layout_below="@+id/progressBar"
    android:id="@+id/player_list_video"
    android:layout_width="match_parent"
    android:layout_height="220dp" />

@Override
public void downloadEnd() {
    // TODO Auto-generated method stub
    Log.w(TAG, "ENd");
    JCVideoPlayerStandard player = (JCVideoPlayerStandard) findViewById(R.id.player_list_video);
    boolean setUp = player.setUp(localPath+"adc.mp4", JCVideoPlayer.SCREEN_LAYOUT_LIST, "");
    if (setUp) {
        Glide.with(OtherActivity.this).load("http://a4.att.hudong.com/05/71/01300000057455120185716259013.jpg").into(player.thumbImageView);
    }