How to find the right file path in sdcard?

Question

This is the previous post.
About mp3 player And the picture below is my A.mp3 path I find in my phone. `

  mediaPlayer.setDataSource("/storage/sdcard1/A.mp3") 

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  File file =new   File(Environment.getExternalStorageDirectory(),"A.mp3");
  mediaPlayer.setDataSource(file.getPath());

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There are two paths above..According the picture,it should be the first one,but it does not work.

I push A.mp3 into the internal storage,and play is ok.

  mediaPlayer.setDataSource("/system/A.mp3");   

Answer 1

Firstly- Check that the SD card is mounted and readable.

if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED));

or

if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED_READ_ONLY));

From your question here: You are using:

File file =new   File(Environment.getExternalStorageDirectory(),"A.mp3");
mediaPlayer.setDataSource(file.getPath());

and have tried:

mediaPlayer.setDataSource("/storage/sdcard1/A.mp3")

Then try:

Edit: add in Music folder.

mediaPlayer.setDataSource("/sdcard1/Music/A.mp3");

Also: this http://www.bogotobogo.com/Android/android24Media.php#SDCard is an interesting link. So you can explore you files in Android Studio.

Answer 2

I finally find that the two files got different permission.I don't know what do those "wrdrrwrwrwrw*****" mean.So I need to search it .

Answer 3

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

This permission was forgotten.Now is ok