CODEWITHSUNDEEP
android
fosho
fosho

Reputation: 1676

Nothing Happening when trying to write to file on SD card android

I am using the following code to write to an SD card:

File dir =new File(android.os.Environment.getExternalStorageDirectory(),"MyFolder");
    if(!dir.exists())
    {
        dir.mkdirs();
    }
    String filename= "MyDoople.txt";
    try
    {
        File f = new File(dir+File.separator+filename);

        FileOutputStream fOut = new FileOutputStream(f);
        OutputStreamWriter myOutWriter = new OutputStreamWriter(
                fOut);
        myOutWriter.append("Mytest");
        myOutWriter.close();
        fOut.close();
        Toast.makeText(getBaseContext(),
                "Text Updated",
                Toast.LENGTH_SHORT).show();
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }

However when I run my app, and then go check in the SD card, there is nothing there. Why am I not seeing the file that I created? I am using android jellybean 4.1 and have added the write permissions in the manifest file.

Upvotes: 0

Views: 126

Answers (1)

Derek Fung
Derek Fung

Reputation: 8211

From your code, you're writing to the folder "MyFolder" under primary external storage.

What is the device you are using? Does it have interal storage in additional to sd card? If yes, then your file is written to the internal storage, but not the sd card.

Edit: To access SD Card, you simply replace android.os.Environment.getExternalStorageDirectory() with the sd card path.

It is not an easy task to find the path of SD card.

One method is to use ContextCompat.getExternalFilesDirs(context, null), the first element of the returned value would be the same android.os.Environment.getExternalStorageDirectory(), the second element would be somewhere of the sdcard.

However, could be depending on your android version, the directory returned could be a sub-directory on the sd card, i.e. your application specific directory instead of the root of SD card. You have to check and manually change it if you want to find the root directory.

http://developer.android.com/reference/android/support/v4/content/ContextCompat.html#getExternalFilesDirs%28android.content.Context,%20java.lang.String%29

Upvotes: 1

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