在res/目录下创建raw文件夹

MediaActivity.java

VideoView videoView = (VideoView)findViewById(R.id.videoView);
videoView.setMediaController(new MediaController(this));
// 设置视频源播放res/raw中的文件,文件名小写字母,格式: 3gp,mp4等,flv的不一定支持;
Uri rawUri = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.video02);
videoView.setVideoURI(rawUri);
videoView.start();
videoView.requestFocus();

activity.media.java

<?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:orientation="vertical">

    <!--在VideoView外面套一层，用于限制MediaController在视频下边显示-->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="300dp">

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