Android 安卓使用MediaPlayer播放列表视频

ListVideoActivity

import android.app.ProgressDialog;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.widget.ListView;
import android.widget.Toast;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.animee.day20.R;
import com.animee.day20.UniteApp;
import java.util.ArrayList;
import java.util.List;
public class ListVideoActivity extends AppCompatActivity {
    private ListView mListView;
    private VideoListAdapter adapter;
    private List<ParseVideoBean.VideoBean>mDatas;
    private ProgressDialog dialog;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_list_video);
        mListView = (ListView) findViewById(R.id.id_lv);
        mDatas = new ArrayList<>();
        adapter = new VideoListAdapter(this,mDatas);
        mListView.setAdapter(adapter);


        initDialog();
        setData(NetConfig.VIDEO_PATH);
    }


    private void initDialog(){
        dialog = new ProgressDialog(this);
        dialog.setMessage("正在加载中.....");
        dialog.setTitle("提示信息");
    }


    private void setData(String url){
        dialog.show();
        StringRequest request = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() {
            @Override
            public void onResponse(String s) {
                dialog.dismiss();
                if (!TextUtils.isEmpty(s)) {
                    List<ParseVideoBean.VideoBean>list = ParseVideoBean.parseData(s);
                    if (list!=null&&list.size()!=0) {
                        mDatas.addAll(list);
                        adapter.notifyDataSetChanged();
                    }
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {
                dialog.dismiss();
                Toast.makeText(ListVideoActivity.this,"网络加载失败，请检查网络！！",Toast.LENGTH_LONG).show();
            }
        });
        UniteApp.getHttpQueue().add(request);
    }
}

NetConfig

public interface NetConfig {
    String VIDEO_PATH = "http://m2.qiushibaike.com/article/list/video?page=2&count=30&readarticles=[115762484,115762135,115764350,115761463,115760316,115764445,115763537,115758684]&rqcnt=17&r=804df97a1459411164081";
}

ParseVideoBean

import com.google.gson.Gson;


import java.util.List;


/**
 * Created by Administrator on 2017/1/18.
 */


public class ParseVideoBean {
    private List<VideoBean>items;


    public List<VideoBean> getItems() {
        return items;
    }


    public void setItems(List<VideoBean> items) {
        this.items = items;
    }


    public static List<VideoBean>parseData(String json){
        return  new Gson().fromJson(json,ParseVideoBean.class).getItems();
    }


    public class VideoBean{
        private String high_url;
        private String pic_url;
        private String content;
        private String low_url;


        public VideoBean(String high_url, String pic_url, String content, String low_url) {
            this.high_url = high_url;
            this.pic_url = pic_url;
            this.content = content;
            this.low_url = low_url;
        }


        public VideoBean() {
        }


        public String getHigh_url() {
            return high_url;
        }


        public void setHigh_url(String high_url) {
            this.high_url = high_url;
        }


        public String getPic_url() {
            return pic_url;
        }


        public void setPic_url(String pic_url) {
            this.pic_url = pic_url;
        }


        public String getContent() {
            return content;
        }


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


        public String getLow_url() {
            return low_url;
        }


        public void setLow_url(String low_url) {
            this.low_url = low_url;
        }
    }
}

VideoListAdapter

import android.content.Context;
import android.media.MediaPlayer;
import android.net.Uri;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;


import com.animee.day20.R;
import com.squareup.picasso.Picasso;


import java.io.IOException;
import java.util.List;
/**
 * Created by Administrator on 2017/1/18.
 */
public class VideoListAdapter extends BaseAdapter implements View.OnClickListener{
    private Context context;
    private LayoutInflater inflater;
    private List<ParseVideoBean.VideoBean>mDatas;


    private MediaPlayer mediaPlayer;
    //明确在整个列表中，同一时间只有一个会被播放，所以一个mediaplayer就够了
    private int mCurrentPosition = -1;
    public VideoListAdapter(Context context, List<ParseVideoBean.VideoBean> mDatas) {
        this.context = context;
        this.mDatas = mDatas;
        inflater = LayoutInflater.from(context);
        mediaPlayer = new MediaPlayer();
        mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp.start();
            }
        });
        mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                mCurrentPosition = -1;
                notifyDataSetChanged();   //当前视频播放结束了，原来需要播放的不播放了，就通知adapter更新
            }
        });
    }
    @Override
    public int getCount() {
        return mDatas.size();
    }
    @Override
    public Object getItem(int position) {
        return mDatas.get(position);
    }
    @Override
    public long getItemId(int position) {
        return position;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
       ViewHolder viewHolder = null;
        if (convertView==null) {
            convertView = inflater.inflate(R.layout.item_video,parent,false);
            viewHolder = new ViewHolder(convertView);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        ParseVideoBean.VideoBean videoBean = mDatas.get(position);
        viewHolder.mContentTv.setText(videoBean.getContent());
        if (!TextUtils.isEmpty(videoBean.getPic_url())) {
            Picasso.with(context).load(videoBean.getPic_url()).into(viewHolder.mDisplayIv);
        }
        //明确surfaceview播放的条件，播放的位置和当前绘制的位置相等，当前绘制的位置就显示surfaceview
        //并且播放mediaplayer,然后隐藏图片，如果不相等，就隐藏surfaceview不播放
        //播放的位置怎么改变，怎么获取
        //点击图片，然后被点击图片的位置就是要播放视频的位置
        viewHolder.mDisplayIv.setOnClickListener(this);
        //怎么传递当前的位置呢？可以给每个图片设置tag
        viewHolder.mDisplayIv.setTag(position);


        //判断当前位置是显示图片缩略图还是显示视频，就需要看视频播放的位置和当前的位置是否相等。


        if (mCurrentPosition==position) {   //这个位置需要播放视频
            String low_url= videoBean.getLow_url();
            viewHolder.mSurfaceView.setVisibility(View.VISIBLE);
            viewHolder.mDisplayIv.setVisibility(View.INVISIBLE);
            //判断当前位置是否播放，如果播放就暂停
            if (mediaPlayer.isPlaying()) {
                mediaPlayer.stop();
            }
            //因为视频播放的地址发生变化了，需要重置播放器
            mediaPlayer.reset();


            //获取当前surfaceview的surfaceholder对象
            SurfaceHolder surfaceHolder = viewHolder.mSurfaceView.getHolder();
            mediaPlayer.setDisplay(surfaceHolder);
            try {
                mediaPlayer.setDataSource(context, Uri.parse(low_url));
                mediaPlayer.prepareAsync();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }else {   //不播放视频，显示图片
            viewHolder.mDisplayIv.setVisibility(View.VISIBLE);
            viewHolder.mSurfaceView.setVisibility(View.INVISIBLE);
        }
        return convertView;
    }


    @Override
    public void onClick(View v) {
        //哪个图片被点击了，哪个图片的点击事件就会被触发，可以拿到点击的位置
        int pos= (Integer) v.getTag();
        if (pos!=-1) {
            mCurrentPosition = pos;
            notifyDataSetChanged();
            //因为点击之后，点击位置的视频播放了，有的视频停止了，列表视图改变了，所以要提示更新
        }
    }


    class ViewHolder{
        SurfaceView mSurfaceView;
        ImageView mDisplayIv;
        TextView mContentTv;
        public ViewHolder(View itemView){
            mSurfaceView = (SurfaceView)itemView.findViewById(R.id.id_item_surface);
            mDisplayIv = (ImageView)itemView.findViewById(R.id.id_item_thumb);
            mContentTv = (TextView)itemView.findViewById(R.id.id_item_tv);
        }
    }
}

activity_list_video

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


    <ListView
        android:id="@+id/id_lv"
        android:layout_width="match_parent"
        android:layout_height="match_parent">


    </ListView>


</RelativeLayout>

item_video

<?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="wrap_content">
    <SurfaceView
        android:id="@+id/id_item_surface"
        android:layout_width="match_parent"
        android:layout_height="220dp" />
    <ImageView
        android:id="@+id/id_item_thumb"
        android:layout_width="match_parent"
        android:layout_height="220dp"
        android:scaleType="centerCrop"
        android:src="@mipmap/ic_launcher"/>
    <TextView
        android:id="@+id/id_item_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示内容"
        android:textSize="26sp"
        android:textColor="@color/colorAccent"
        android:layout_margin="10dp"/>
</RelativeLayout>

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