Erdinc Ay Erdinc Ay - 4 months ago 18
Android Question

How to read from the internal storage (subfolder Download)?

After intensive search I could not find out how to read a configuration file (xml) from the internal storage (sub-folder download). I tried to access

/mnt/sdcard/Download/config.xml
but received an Exception.

When trying to get the available folders from the two possible suppliers
ApplicationContext
and
Environment
, I get these informations:

context.getFilesDir().getAbsolutePath(); // /data/data/com.xxx.yyy/files

context.getDir("Download", 0).getAbsolutePath();
// /data/data/com.xxx.yyy/app_Download

context.getDir("Download", 1).getAbsolutePath();
// /data/data/com.xxx.yyy/app_Download

Environment.getExternalStorageDirectory().getAbsolutePath();
// /storage/emulated/0
context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath();
// /storage/emulated/0/Android/data/com.xxx.yyy/files/Download

Environment.getDataDirectory().getPath();
// /data


When I try these information to access the config.xml in the Download-folder (I manually copied the file over the Windows explorer) I receive errors, e.g. FileNotFoundException or IllegalArgumentException.

Where is my file, and how can I access it properly?

Answer
  1. Set the Read-Permission in your AndroidManifest.xml:

    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
    
  2. Use the following code:

    String filename = Environment.getExternalStorageDirectory().getPath() + File.separator + "download" + File.separator + "config.xml";
    
  3. Use filename for whatever you want to do.
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