视频播放器其实本质上与音乐播放器大同小异,说到底本质上就是音频源的不同,所以我就不像上一篇将音乐播放器那样详细了,只用手机内存卡中的视频做示范。
音乐播放器博客地址http://blog.csdn.net/zhangkaidsy/article/details/75571038
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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"
android:orientation="vertical"
tools:context="com.example.android27_zhangkai_playvideo.MainActivity">
<SurfaceView
android:layout_width="match_parent"
android:layout_height="400dp"
android:id="@+id/sv_main_surface"
/>
<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:src="@android:drawable/ic_media_play"
android:onClick="playOrPause"
/>
</LinearLayout>
MainActivity.java
package com.example.android27_zhangkai_playvideo;
import android.media.AudioManager;
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 sv_main_surface;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sb_main_bar = (SeekBar) findViewById(R.id.sb_main_bar);
sv_main_surface = (SurfaceView) findViewById(R.id.sv_main_surface);
//给进度条设置滑动监听
sb_main_bar.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) {
//获取当前进度条的位置
int currentPosition=seekBar.getProgress();
//跳转到某个位置进行播放
mediaPlayer.seekTo(currentPosition);
}
});
}
public void playOrPause(View view){
final ImageButton imageButton= (ImageButton) view;
//实例化MediaPlayer
if(mediaPlayer==null){
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
String sdPath=Environment.getExternalStorageDirectory().getAbsolutePath();
mediaPlayer=new MediaPlayer();
//设置音频流的类型
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
//设置音源
try {
mediaPlayer.setDataSource(this, Uri.parse("file://"+sdPath+"/dcim/camera/video_20161013_233717.mp4"));
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
//将画面展示到 SurfaceView上
mediaPlayer.setDisplay(sv_main_surface.getHolder());
mediaPlayer.start();
//暂停图标
imageButton.setImageResource(android.R.drawable.ic_media_pause);
//获取音乐的播放时间
int time=mediaPlayer.getDuration();
//设置进度条的最大值 为 视频的播放时间
sb_main_bar.setMax(time);
new MyThread().start();
}
}else if(mediaPlayer.isPlaying()){
mediaPlayer.pause();
//播放图标
imageButton.setImageResource(android.R.drawable.ic_media_play);
}else{
mediaPlayer.start();
//暂停图标
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()){
//获取音乐当前的播放位置
int currentPosition=mediaPlayer.getCurrentPosition();
sb_main_bar.setProgress(currentPosition);
}
}
}
}
上述代码就可以实现视频播放器了。
除了上述的方式,还有一种更为简单的方式:
那就是使用VideoView标签
activity_video.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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">
<VideoView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/vv_video"
/>
</LinearLayout>
VedioActivity.java
package com.zking.administrator.g160628_android28_playvideo;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.MediaController;
import android.widget.VideoView;
public class VideoActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video);
VideoView vv_video= (VideoView) findViewById(R.id.vv_video);
vv_video.setVideoURI(Uri.parse("file://mnt/sdcard/dcim/camera/VID_20170715_140439.mp4"));
MediaController mediaController=new MediaController(this);
mediaController.setMediaPlayer(vv_video);
vv_video.setMediaController(mediaController);
}
}
上述代码也可实现视频播放