android - 在android中检测Sdcard？

Question

如果使用内部存储器挂载，我正在使用以下代码访问 sdcard:

 if( android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
    {       
        //File file = Environment.getExternalStorageDirectory();

        videoPath=Environment.getExternalStorageDirectory()+"/cue_learn_data/video_files/"+VIDEO_FILENAME+".mp4";

    }
    else
     {

     videoPath="/cue_learn_data/video_files/"+VIDEO_FILENAME+".mp4";

     }

但是当我使用第一个条件时找不到 vidoePath。有人可以帮忙吗？

Answer 1

尝试这样做:

String tmp = "/cue_learn_data/video_files/"+VIDEO_FILENAME+".mp4";
File myFile= new File(Environment.getExternalStorageDirectory(), tmp);

if(myFile.exists()){
    //further processing as your file exists
}
else{
    //seems like your file doesnt exist
}