Android(安卓)中播放内存中视频

Android播放内存中视频有两种方法：
1.Android中自带的mediaController（媒体控制器）

VideoViewActivity.java

package com.example.videodisplay;import android.content.pm.ActivityInfo;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.widget.MediaController;import android.widget.VideoView;public class VideoViewActivity extends AppCompatActivity {    private VideoView vv_video_view;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_video_view);        this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);        vv_video_view = (VideoView) findViewById(R.id.vv_video_view);        //设置播放的来源        vv_video_view.setVideoPath("file://mnt/sdcard/360Video/sister.mp4");        //实例化媒体控制器        MediaController mediaController=new MediaController(this);        mediaController.setMediaPlayer(vv_video_view);        vv_video_view.setMediaController(mediaController);    }}

activity_video_view.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    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"    >    <VideoView        android:layout_width="match_parent"        android:layout_height="400dp"        android:id="@+id/vv_video_view"        />LinearLayout>

2.利用mediaPlayer和SurfaceView实现视频播放

MainActivity.java

package com.example.videodisplay;import android.media.MediaPlayer;import android.net.Uri;import android.os.Environment;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.SurfaceView;import android.view.View;import android.widget.ImageButton;import android.widget.SeekBar;import java.io.IOException;public class MainActivity extends AppCompatActivity {    private MediaPlayer mediaPlayer;    private SeekBar sb_main_bar;    private SurfaceView sfv_1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        sb_main_bar = (SeekBar) findViewById(R.id.sb_main_bar);        sfv_1 = (SurfaceView) findViewById(R.id.sfv_1);        //给进度条设置滑动的监听        sb_main_bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {            @Override            public void onProgressChanged(SeekBar seekBar, int i, boolean b) {            }            @Override            public void onStartTrackingTouch(SeekBar seekBar) {            }            @Override            public void onStopTrackingTouch(SeekBar seekBar) {                int progress=seekBar.getProgress();                //在当前位置播放                mediaPlayer.seekTo(progress);            }        });    }    public void isPlayOrPause(View view){        final ImageButton imageButton= (ImageButton) view;        if(mediaPlayer==null){            //播放内存中音频            //mediaPlayer = MediaPlayer.create(this, R.raw.f);            //播放内存卡中文件            mediaPlayer=new MediaPlayer();            //设置音源            try {                mediaPlayer.setDataSource(this, Uri.parse("file://mnt/sdcard/360Video/advideo.mp4"));//                mediaPlayer.setDataSource(this, Uri.parse("http://193.168.4.135/internet.mp3"));                //准备                mediaPlayer.prepare();                //mediaPlayer.prepareAsync();            } catch (IOException e) {                e.printStackTrace();            }            //设置准备完成的监听//            mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {//                @Override//                public void onPrepared(MediaPlayer mediaPlayer) {            //下载操作（复制）            //将媒体播放器捕捉的画面展示到SurfaceView            mediaPlayer.setDisplay(sfv_1.getHolder());            mediaPlayer.start();            imageButton.setImageResource(android.R.drawable.ic_media_pause);            //获取音乐的总时长            int duration=mediaPlayer.getDuration();            //将进度条设置最大值为：音乐的总时长            sb_main_bar.setMax(duration);            new MyThread().start();//                }//            });        }else if(mediaPlayer.isPlaying()){            mediaPlayer.pause();            imageButton.setImageResource(android.R.drawable.ic_media_play);        }else{            mediaPlayer.start();            imageButton.setImageResource(android.R.drawable.ic_media_pause);        }    }    class MyThread extends Thread{        @Override        public void run() {            super.run();            while(sb_main_bar.getProgress()<=sb_main_bar.getMax()){                //获取音乐当前播放的位置                int position=mediaPlayer.getCurrentPosition();                sb_main_bar.setProgress(position);            }        }    }}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"    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"    android:orientation="vertical"    tools:context="com.example.videodisplay.MainActivity">    <SurfaceView        android:layout_width="match_parent"        android:layout_height="300dp"        android:id="@+id/sfv_1"        />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="vertical"        >        <SeekBar            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:id="@+id/sb_main_bar"            />        <ImageButton            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_gravity="center"            android:src="@android:drawable/ic_media_play"            android:onClick="isPlayOrPause"            />    LinearLayout>LinearLayout>

最后必须要加上读取内存的权限

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

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