在 Android 上使用 Intent 打开视频链接的问题

Intent intent = new Intent(Intent.ACTION_VIEW);   

 intent.setDataAndType(Uri.parse("http://www.yourvideo.mp4"), "video/mp4");   

 view.getContext().startActivity(intent); 

检测 Android 中的某个 Intent 是否有效

public static boolean isIntentAvailable(Context context, String action) {  

    final PackageManager packageManager = context.getPackageManager();  

    final Intent intent = new Intent(action);  

    List<ResolveInfo> list =  
            packageManager.queryIntentActivities(intent,  

                   PackageManager.MATCH_DEFAULT_ONLY);  

    return list.size() > 0;  

 }