Android - SurfaceView+MediaPlayer、VideoView 2种方法播放视频

Android当中实现视频播放的方式有两种，即：通过VideoView实现或者通过SurfaceView + MediaPlayer实现。

首先为大家介绍SurfaceView+MediaPlayer播放视频的方法，这种方法和我的上一篇博文播放音频差不多，只是需要将媒体播放捕捉的画面展示到surfaceView控件上即可，加一句代码即可

mediaPlayer.setDisplay(media_player_surfaceView.getHolder());

与VideoView的不同点就是需要自己定义进度条和暂停按钮

xml文件代码，这里点击imageButton开始播放视频，需要定义一个SurfaceView用来放视频

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/activity_media_player"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin">

<!--放视频的surfaceView-->
<SurfaceView
android:layout_width="match_parent"
android:layout_height="300dp"
android:id="@+id/media_player_surfaceView"/>

<LinearLayout
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">

<!--进度条可以调节进度-->
<SeekBar
android:layout_weight="1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/media_player_seekBar" />

<!--暂停和播放按钮-->

<ImageButtonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@android:drawable/ic_media_play"android:onClick="playpause"/> </LinearLayout></LinearLayout>

Activity代码，我这里是播放内存卡里的视频，

package com.zking.a24provider;

import android.content.Intent;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.net.Uri;
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 MediaPlayerActivity extends AppCompatActivity {

private SeekBar media_player_seekBar;
private MediaPlayer mediaPlayer;
private SurfaceView media_player_surfaceView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_media_player);
media_player_seekBar = (SeekBar) findViewById(R.id.media_player_seekBar);
media_player_surfaceView = (SurfaceView) findViewById(R.id.media_player_surfaceView);

//给进度条设置拖动改变监听事件,必须是在拖动结束后设置
media_player_seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {

}

@Override
public void onStartTrackingTouch(SeekBar seekBar) {

}

@Override
public void onStopTrackingTouch(SeekBar seekBar) {
//获取拖动结束后的位置
int progress=media_player_seekBar.getProgress();
//跳转到某个位置播放
mediaPlayer.seekTo(progress);
}
});
}

//播放或暂停按钮点击事件
public void playpause(View view){
final ImageButton button_play=(ImageButton) view;
if(mediaPlayer==null){
//1.播放应用内音频文件
//mediaPlayer = MediaPlayer.create(this, R.raw.love);

//2.播放内存卡中音频文件
mediaPlayer=new MediaPlayer();
//设置类型
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//设置音频
try {

//内存卡里的一个视频
mediaPlayer.setDataSource(this, Uri.parse("file://mnt/sdcard/i音乐/我的下载/VID_20161002_194913.mp4"));
//准备一下
mediaPlayer.prepare();

//将媒体播放捕捉的画面展示到surfaceView
mediaPlayer.setDisplay(media_player_surfaceView.getHolder());

} catch (IOException e) {
e.printStackTrace();
}

//开始

mediaPlayer.start(); //把图标修改为暂停的图标 button_play.setImageResource(android.R.drawable.ic_media_pause); //获取音乐的总时长 int duration=mediaPlayer.getDuration(); //设置进度条的最大值为音乐的总时长 media_player_seekBar.setMax(duration); //使用线程让进度条动起来 new MyThread().start(); }else if(mediaPlayer.isPlaying()){ mediaPlayer.pause(); //把图标修改为播放的图标 button_play.setImageResource(android.R.drawable.ic_media_play); }else{ mediaPlayer.start(); //把图标修改为暂停的图标 button_play.setImageResource(android.R.drawable.ic_media_pause); } } class MyThread extends Thread{ @Override public void run() { super.run(); while (media_player_seekBar.getProgress()<=media_player_seekBar.getMax()){ //获取当前音乐播放的位置 int currentPosition=mediaPlayer.getCurrentPosition(); //让进度条动起来 media_player_seekBar.setProgress(currentPosition); } } }}

下面为大家介绍VideoView播放视频的方法

xml文件代码，这里只需要定义一个VideoView控件

<?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_vedio"
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.zking.a24provider.VideoActivity">

<VideoViewandroid:layout_width="match_parent"
android:layout_height="300dp"
android:id="@+id/vedio_vedioView"/>

</LinearLayout>

Activity代码，同上，也是播放内存卡里的视频文件

package com.zking.a24provider;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.MediaController;
import android.widget.VideoView;

public class VideoActivity extends AppCompatActivity {

private VideoView vedio_vedioView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video);

//先找到控件id
vedio_vedioView = (VideoView) findViewById(R.id.vedio_vedioView);

//给vedioView设置播放来源
vedio_vedioView.setVideoPath("file://mnt/sdcard/i音乐/我的下载/VID_20161002_194913.mp4");

//实例化媒体控制器
MediaController mediaController=new MediaController(this);

vedio_vedioView.setMediaController(mediaController);
mediaController.setMediaPlayer(vedio_vedioView);
}

}

VideoView这种方法明显要简单很多，如果想自己写一个播放器，可以用SurfaceView+MediaPlayer的方法

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