本地视频播放器

用SurfaceView+MediaPlayer做的简单本地视频播放器

首先是VideoUtil 类

package com.example.myvideo;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.database.Cursor;import android.provider.MediaStore;public class VideoUtil {//通过遍历数据库来获取视频的路径，时间，大小，    public static List<VideoInfo> getVideoInfos(Context context){        Cursor cursor = context.getContentResolver().                query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, null, null, null, MediaStore.Video.Media._ID);//MediaStore.Video.Media._ID 通过ID来排序 当然也可以使用默认排序MediaStore.Video.Media.DEFAULT_SORT_ORDER        List<VideoInfo> videoinfos = new ArrayList<VideoInfo>();        for(int i = 0; i<cursor.getCount(); i++){            VideoInfo videoInfo = new VideoInfo();            cursor.moveToNext();            int id = i;            String title = cursor.getString(cursor.getColumnIndex(MediaStore.Video.Media.TITLE));            String url = cursor.getString(cursor.getColumnIndex(MediaStore.Video.Media.DATA));            long time = cursor.getLong(cursor.getColumnIndex(MediaStore.Video.Media.DURATION));            videoInfo.setId(id);            videoInfo.setTitle(title);            videoInfo.setTime(time);            videoInfo.setUrl(url);            videoinfos.add(videoInfo);        }        cursor.close();//关闭数据库        return videoinfos;    }    /**    *把long格式的时间转化成00:00:00    */    public static String millions2hour(int million) {        int hour = million / (60 * 60 * 1000);        int minute = (million - hour * 60 * 60 * 1000) / (60 * 1000);        int seconds = (million - hour * 60 * 60 * 1000 - minute * 60 * 1000) / 1000;        if (seconds >= 60) {            seconds = seconds % 60;            minute += seconds / 60;        }        if (minute >= 60) {            minute = minute % 60;            hour += minute / 60;        }        String sh = "";        String sm = "";        String ss = "";        if (hour < 10) {            sh = "0" + String.valueOf(hour);        } else {            sh = String.valueOf(hour);        }        if (minute < 10) {            sm = "0" + String.valueOf(minute);        } else {            sm = String.valueOf(minute);        }        if (seconds < 10) {            ss = "0" + String.valueOf(seconds);        } else {            ss = String.valueOf(seconds);        }        return sh + ":" + sm + ":" + ss;    }   }

VideoInfo类

这个类没什么好说的

package com.example.myvideo;public class VideoInfo {    private int id;    private String title;    private long time;    private String url;    public int getId(){        return id;    }    public void setId(int id){        this.id = id;    }    public String getTitle(){        return title;    }    public void setTitle(String title){        this.title = title;    }    public long getTime(){        return time;    }    public void setTime(long time){        this.time = time;    }    public String getUrl(){        return url;    }    public void setUrl(String url){        this.url = url;    }}

MainActivity

关于快进快退我就没具体写了，使用mediaplay的getCurrentPosition()方法获得当前时间，然后在对当前时间进行加减计算，然后在通过mediaplay的seekTo()方法来设置

package com.example.myvideo;import java.lang.ref.WeakReference;import android.app.Activity;import android.media.MediaPlayer;import android.media.MediaPlayer.OnCompletionListener;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.MotionEvent;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Button;import android.widget.LinearLayout;import android.widget.SeekBar;import android.widget.SeekBar.OnSeekBarChangeListener;import android.widget.TextView;public class MainActivity extends Activity implements OnClickListener {    private SurfaceView video;    private VideoInfo videoInfo;    private MediaPlayer player;    private Button mPre, mPlayPause, mNext;    private SurfaceHolder holder;    private TextView mCurTime, mTime;    private SeekBar mSeekBar;    private LinearLayout mLayout;    MyHandler mHandler = new MyHandler(MainActivity.this);    CountTimeThread countTimeThread;    private int id = 0;    private int mCount;    String url;    int position;    Handler handler = new Handler() {    };    Runnable runnable = new Runnable() {        @Override        public void run() {            if (player.isPlaying()) {//当处于播放状态时                if (mSeekBar.isEnabled() == false) {//当seekbar不可用时                    mSeekBar.setEnabled(true);//seekbar可用                }                position = player.getCurrentPosition();                String curtime = VideoUtil.millions2hour(position);                int alltime = (int) videoInfo.getTime();                String time = VideoUtil.millions2hour(alltime);                mTime.setText(time);                mCurTime.setText(curtime);                mSeekBar.setProgress(position);                mSeekBar.setMax(alltime);            }            handler.postDelayed(this, 1000);        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);//隐藏标题栏        setContentView(R.layout.activity_main);        initView();    }    void initView() {        mCurTime = (TextView) findViewById(R.id.tv_curtime);        mTime = (TextView) findViewById(R.id.tv_time);        mCurTime.setText("00:00:00");        mTime.setText("00:00:00");        player = new MediaPlayer();        videoInfo = new VideoInfo();        mCount = VideoUtil.getVideoInfos(this).size();        video = (SurfaceView) findViewById(R.id.video);        mPre = (Button) findViewById(R.id.btn_pre);        mPlayPause = (Button) findViewById(R.id.btn_playpause);        mNext = (Button) findViewById(R.id.btn_next);        mLayout = (LinearLayout) findViewById(R.id.btn_bar);        mPre.setOnClickListener(this);        mNext.setOnClickListener(this);        mPlayPause.setOnClickListener(this);        video.setOnClickListener(this);        mSeekBar = (SeekBar) findViewById(R.id.progress);        SeekBarListener mListener = new SeekBarListener();        mSeekBar.setOnSeekBarChangeListener(mListener);        mSeekBar.setEnabled(false);//seekbar初始化时时不可拖动的        AutoPlay();        handler.postDelayed(runnable, 1000);        startCountTimeThread();//这是自动隐藏控件的线程    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.btn_playpause:            if (!player.isPlaying()) {                if (position != 0) {//当播放时间不为0                    videoPlay(id);                    player.seekTo(position);//跳转到之前的播放时间                } else {                    videoPlay(id);                }            } else if (player.isPlaying()) {                player.pause();                mSeekBar.setEnabled(false);            }            break;        case R.id.btn_pre:            if (id == 0) {                id = mCount - 1;                videoPlay(id);            } else {                id = id - 1;                videoPlay(id);            }            break;        case R.id.btn_next:            if (id == mCount - 1) {                id = 0;                videoPlay(0);            } else {                id = id + 1;                videoPlay(id);            }            break;        case R.id.video:            if (mLayout.isShown()) {                mLayout.setVisibility(View.GONE);            } else {                mLayout.setVisibility(View.VISIBLE);            }            break;        default:            break;        }    }    private void videoPlay(int id) {        try {            player.reset();            videoInfo = VideoUtil.getVideoInfos(this).get(id);            url = videoInfo.getUrl();            player.setDataSource(url);            holder = video.getHolder();            player.setDisplay(holder);            player.prepare();            player.start();        } catch (Exception e) {            e.printStackTrace();        }    }    //自动播放下一首    private void AutoPlay() {        player.setOnCompletionListener(new OnCompletionListener() {            @Override            public void onCompletion(MediaPlayer mp) {                if (id < mCount - 1) {                    id = id + 1;                    videoPlay(id);                    player.start();                } else {                    id = 0;                    videoPlay(0);                    player.start();                }            }        });    }    public class SeekBarListener implements OnSeekBarChangeListener {        @Override        public void onProgressChanged(SeekBar seekBar, int progress,                boolean fromUser) {            if (fromUser == true && player.isPlaying()) {            //fromUser判断是否为用户自己操作                player.seekTo(progress);            }        }        @Override        public void onStartTrackingTouch(SeekBar seekBar) {        }        @Override        public void onStopTrackingTouch(SeekBar seekBar) {        }    }    @Override    public boolean onTouchEvent(MotionEvent event) {        countTimeThread.reset();// 重置时间        if (event.getAction() == MotionEvent.ACTION_DOWN) {            boolean isVisible = mLayout.isShown();            if (!isVisible) {                mLayout.setVisibility(View.VISIBLE);                return true;            }        }        return super.onTouchEvent(event);    }    private void startCountTimeThread() {        countTimeThread = new CountTimeThread(5);        countTimeThread.start();    }    /**     * 隐藏需要隐藏的布局     */    private void hide() {        if (mLayout.isShown()) {        //mLayout.isShown()判断控件是否在VISIBIL状态            mLayout.setVisibility(View.GONE);        }    }    /**     * Handler消息传递机制     */    class MyHandler extends Handler {        // 发送消息的id        private final int MSG_HIDE = 0x001;        // WeakReference垃圾回收机制        private WeakReference<MainActivity> weakRef;        public MyHandler(MainActivity mMainActivity) {            weakRef = new WeakReference<MainActivity>(mMainActivity);        }        @Override        public void handleMessage(Message msg) {            final MainActivity mainActivity = weakRef.get();            if (mainActivity != null) {                switch (msg.what) {                case MSG_HIDE:                    hide();                    break;                }            }            super.handleMessage(msg);        }        /**         * 发送消息         */        public void sendHideControllMessage() {            obtainMessage(MSG_HIDE).sendToTarget();        }    }    private class CountTimeThread extends Thread {        private final long maxVisibleTime;        private long startVisibleTime;        /**         * 设置控件显示时间 second单位是秒         * @param second         */        public CountTimeThread(int second) {            maxVisibleTime = second * 1000;// 换算为毫秒            setDaemon(true);// 设置为后台进程        }        /**         * 如果用户有操作，则重新开始计时隐藏时间         */        private synchronized void reset() {            startVisibleTime = System.currentTimeMillis();        }        @Override        public void run() {            startVisibleTime = System.currentTimeMillis();// 初始化开始时间            while (true) {                // 如果时间达到最大时间，则发送隐藏消息                if (startVisibleTime + maxVisibleTime < System.currentTimeMillis()) {                    mHandler.sendHideControllMessage();                    startVisibleTime = System.currentTimeMillis();                }                try {                    Thread.sleep(1000);                } catch (Exception e) {                }            }        }    }}

这是布局activity_main.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="fill_parent"    android:layout_height="fill_parent" >    <SurfaceView        android:id="@+id/video"        android:layout_width="match_parent"        android:layout_height="match_parent" />    <LinearLayout        android:id="@+id/btn_bar"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_gravity="bottom"        android:orientation="vertical" >        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="horizontal" >            <TextView                android:id="@+id/tv_curtime"                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:gravity="center"                android:textColor="@android:color/white"                android:textSize="24sp" />            <SeekBar                android:id="@+id/progress"                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="5"                android:maxHeight="10dp"                android:minHeight="10dp" />            <TextView                android:id="@+id/tv_time"                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:gravity="center"                android:textColor="@android:color/white"                android:textSize="24sp" />        </LinearLayout>        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="horizontal" >            <LinearLayout                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:gravity="center" >                <Button                    android:id="@+id/btn_pre"                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:text="@string/pre"                    android:textColor="@android:color/white"                    android:textSize="24sp" />            </LinearLayout>            <LinearLayout                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:gravity="center" >                <Button                    android:id="@+id/btn_playpause"                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:text="@string/play"                    android:textColor="@android:color/white"                    android:textSize="24sp" />            </LinearLayout>            <LinearLayout                android:layout_width="0dp"                android:layout_height="wrap_content"                android:layout_weight="1"                android:gravity="center" >                <Button                    android:id="@+id/btn_next"                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:text="@string/next"                    android:textColor="@android:color/white"                    android:textSize="24sp" />            </LinearLayout>        </LinearLayout>    </LinearLayout></FrameLayout>

记得加权限

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.myvideo"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="17"        android:targetSdkVersion="22" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@android:style/Theme.NoTitleBar" >        <activity            android:name=".MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>