How to play videos in android from assets folder o

2019-01-01 15:27发布

I am trying to play a video in android emulator I have the video in my assets folder as well as the raw folder But after doing some research still i cant play video in my emulator i am working on android 2.1 My video format is mp4 so i don't think that should be a problem Could anyone just give me an example code so that i can understand a bit more?

The problem is that the VideoView that I need to display the Video will take only a URI or a File path to point to the Video.

If I save the video in the raw or assets folder I can only get an input stream or a file descriptor and it seems nothing of that can be used to initialize the VideoView.

Update

I took a closer look at the MediaPlayer example and tried to start a MediaPlayer with a FileDescriptor to the assets files as in the code below:

SurfaceView videoView = (SurfaceView) findViewById(gettingStarted)
SurfaceHolder holder = videoView.getHolder();
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
final MediaPlayer player = new MediaPlayer();
player.setDisplay(holder);

player.setDataSource(getAssets().openFd(fileName).getFileDescriptor());
player.prepareAsync();
player.setOnPreparedListener(new OnPreparedListener() {

   @Override
   public void onPrepared(MediaPlayer mp) {
      mp.start();
   }
});

Now I get a the following exception:

java.io.FileNotFoundException: This file can not be opened as a file descriptor; it is probably compressed

It seems there is no other way then copying the file to the sdcard on startup and that seems like a waste of time and memory.

13条回答
萌妹纸的霸气范
2楼-- · 2019-01-01 15:43

MainCode

Uri raw_uri=Uri.parse("android.resource://<package_name>/+R.raw.<video_file_name>);

myVideoView=(VideoView)findViewbyID(R.idV.Video_view);

myVideoView.setVideoURI(raw_uri);
myVideoView.setMediaController(new MediaController(this));
myVideoView.start();
myVideoView.requestFocus();

XML

<?xml version="1.0" encoding="utf-8" ?>

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
        <VideoView
            android:id="+@/Video_View"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
        />
</LinearLayout>
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荒废的爱情
3楼-- · 2019-01-01 15:45

PlayVideoActivity.java:

public class PlayVideoActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_play_video);

        VideoView videoView = (VideoView) findViewById(R.id.video_view);
        MediaController mediaController = new MediaController(this);
        mediaController.setAnchorView(videoView);
        videoView.setMediaController(mediaController);
        videoView.setVideoURI(Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.documentariesandyou));
        videoView.start();
    }
}

activity_play_video.xml:

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center" >

    <VideoView
        android:id="@+id/video_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </VideoView>

</LinearLayout>
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路过你的时光
4楼-- · 2019-01-01 15:46
String UrlPath="android.resource://"+getPackageName()+"/"+R.raw.ur file name;
videocontainer.setVideoURI(Uri.parse(UrlPath));
videocontainer.start();

where videocontainer of type videoview.

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有味是清欢
5楼-- · 2019-01-01 15:48

Try:

AssetFileDescriptor afd = getAssets().openFd(fileName);
player.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(), afd.getLength());
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美炸的是我
6楼-- · 2019-01-01 15:48

It sounds maybe like you have the same issue as i do. instead of using MP4, is 3GPP possible? i think i used like HandBrake or something as the video converter... you just need to make sure you have the right encoder, like H.264x or something. sorry for being a little vague, it's been a while. Also, if it's possible, don't bother worrying about android 2.1 anymore, and also, something things just WILL NOT WORK IN EMULATOR. so if it works on a lot of devices, then just assume it works (especially with different manufacurers)

here, you can read my problem and how i solved the issue (after a long time and no one had an answer). i explained in a lot more detail here: android media player not working

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有味是清欢
7楼-- · 2019-01-01 15:50
  1. Use the MediaPlayer API and the sample code.

  2. Put the media file in raw folder.

  3. Get the file descriptor to the file.

  4. mediaplayer.setDataSource(fd,offset,length); - its a three argument constructor.

  5. Then when onPreared , mediaplayer.start();

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