如何在android编程中获取外部sdcard路径？

Question

我想播放存储卡中的音频文件。

android编程中如何获取外部sdcard路径？

不幸的是，每个安卓手机型号都有不同的路径。例如：

Galaxy S3 android 4.4：存储卡存在路径：“/mnt/extSdCard/”

荣耀7c android 8：内存卡存在路径： "/mnt/ext_sdcard/"

我在诺基亚 5 和 android 9 和小米 Redmi 3s 和 android 6 中找不到路径。

 try {

File root = Environment.getExternalStorageDirectory();
String audioPath = root.getAbsolutePath() + "/telavatquran/naba.mp3";

            FileInputStream fis = new FileInputStream(audioPath);

            fd = fis.getFD();

            if (fd != null) {
                player.setDataSource(fd);
                player.prepare();
                player.start();

            } else if (new File("/mnt/sdcard/external_sd/").exists()) {
                seekUpdation();
                player.setDataSource("/mnt/sdcard/external_sd/telavatquran/naba.mp3/");
                player.prepare();
                player.start();

            } else if (new File("/storage/extSdCard/").exists()) {
                seekUpdation();
                player.setDataSource("/storage/extSdCard/telavatquran/naba.mp3/");
                player.prepare();
                player.start();

            } else if (new File("/mnt/extSdCard/").exists()) {
                seekUpdation();
                player.setDataSource("/mnt/extSdCard/telavatquran/naba.mp3/");
                player.prepare();
                player.start();

            } else if (new File("/mnt/sdcard/external_sd/").exists()) {
                seekUpdation();
                player.setDataSource("/mnt/sdcard/external_sd/telavatquran/naba.mp3/");
                player.prepare();
                player.start();

            } else if (new File("storage/sdcard1/").exists()) {
                seekUpdation();
                player.setDataSource("storage/sdcard1/telavatquran/naba.mp3/");
                player.prepare();
                player.start();

            } else if (new File("/mnt/ext_sdcard/").exists()) {
                seekUpdation();
                player.setDataSource("/mnt/ext_sdcard/telavatquran/naba.mp3/");
                player.prepare();
                player.start();

            }
} catch (Exception e) {

                }

感谢您的合作。

Answer 1

'this is a b4a code I used


Sub GetRootExternalSDCard() As String

Dim rp As RuntimePermissions
Dim Swriteablefolder  As List
Dim tempstr As String
Dim x As Int


Swriteablefolder=rp.GetAllSafeDirsExternal("")

'   For x=0 To Swriteablefolder.Size-1
'       Log(Swriteablefolder)
'   Next
tempstr=Swriteablefolder.Get(1)

x=tempstr.IndexOf("/Android")
Return tempstr.SubString2(0,x)

End Sub