首先我們要集成greendao:
集成的過(guò)程不多說(shuō)了，網(wǎng)上一大堆；
在就是建立我們的User類:
展示一下：

package com.example.greendaomoreloading;

import org.greenrobot.greendao.annotation.Entity;
import org.greenrobot.greendao.annotation.Id;
import org.greenrobot.greendao.annotation.Generated;

/**
 * 作者：author
 * 時(shí)間 ：
 * 說(shuō)明：
 */
@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;
    public String getUrl() {
        return this.url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public Integer getCompelete_size() {
        return this.compelete_size;
    }
    public void setCompelete_size(Integer compelete_size) {
        this.compelete_size = compelete_size;
    }
    public Integer getEnd_pos() {
        return this.end_pos;
    }
    public void setEnd_pos(Integer end_pos) {
        this.end_pos = end_pos;
    }
    public Integer getStart_pos() {
        return this.start_pos;
    }
    public void setStart_pos(Integer start_pos) {
        this.start_pos = start_pos;
    }
    public Integer getThread_id() {
        return this.thread_id;
    }
    public void setThread_id(Integer thread_id) {
        this.thread_id = thread_id;
    }
    public Long getId() {
        return this.id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    @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() {
    }

}

通過(guò)greendao來(lái)實(shí)現(xiàn)斷點(diǎn)的思想：
參考地址：https://www.cnblogs.com/cainiaodongdong/p/7880723.html
通過(guò)參考的文章，我們要在清單文件里面添加一些設(shè)置：
權(quán)限和name:
展示一下清單文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.greendaomoreloading">
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <application
        android:name=".App" android:allowBackup="true" android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true" android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

最后我們將布局和MainActivity展示：
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.example.greendaomoreloading.MainActivity">

    <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" />
<VideoView
    android:layout_width="match_parent"
    android:layout_height="300dp"
    android:id="@+id/vv"
    android:layout_below="@+id/progressBar"
    android:layout_marginTop="50dp"/>
    <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="下載" />


    <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="暫停" />

</RelativeLayout>

MainActivity:

package com.example.greendaomoreloading;

import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.VideoView;

public class MainActivity 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;
    private VideoView vv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        vv= (VideoView) findViewById(R.id.vv);
        total = (TextView) findViewById(R.id.textView);
        start = (Button) findViewById(R.id.start);
        pause = (Button) findViewById(R.id.delete);
        mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
        String urlString = "http://2449.vod.myqcloud.com/2449_22ca37a6ea9011e5acaaf51d105342e3.f20.mp4";
        String localPath = Environment.getExternalStorageDirectory()
                .getAbsolutePath() + "/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() {
                 vv.setVideoPath(Environment.getExternalStorageDirectory()
                        .getAbsolutePath() + "/local2/adc.mp4");
                vv.start();                
            }
        });
        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();
            }
        });


    }
}