1. 采用Intent调用外部播放器进行视频播放

Intent intent = new Intent(Intent.ACTION_VIEW);
String type = "video/mp4";
Uri uri = Uri.parse("/sdcard/123.mp4");
intent.setDataAndType(uri, type);
startActivity(intent);

VideoView videoView;
videoView = (VideoView)this.findViewById(R.id.videoView);
String uri = "android.resource://" + getPackageName() + "/" + R.raw.videoname;
videoView.setVideoURI(Uri.parse(uri));
videoView.start();

Android -- 播放视频的两种形式