Create File in External SD Card

Question

I'm new in android developing. I want create a File in my external SD Card. I searched a lot and tried different codes. But it created in device storage or it doesn't create at all. I get my SD Card path, it was in /mnt/extSdCard. I even tried several code, but non of them doesn't work. this code found my SD Card location:

 public static String getExternalSdCardPath() {
    String path = null;

    File sdCardFile = null;
    List<String> sdCardPossiblePath = Arrays.asList("external_sd", "ext_sd", "external", "extSdCard");

    for (String sdPath : sdCardPossiblePath) {
        File file = new File("/mnt/", sdPath);

        if (file.isDirectory() && file.canWrite()) {
            path = file.getAbsolutePath();
            Log.i("LOG", "path is: " + path);

            String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date());
            File testWritable = new File(path, "test_" + timeStamp);
            if (testWritable.mkdirs()) {
                testWritable.delete();
            } else {
                path = null;
            }
        }
    }

    if (path != null) {
        sdCardFile = new File(path);
    } else {
        sdCardFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath());
    }
    return sdCardFile.getAbsolutePath();
}

path is my location.

Answer 1

You can use context.getApplicationContext().getExternalFilesDirs() to get array of available string paths, including one which you want. But, it only available in Android 4.4+.

Answer 2

Here is how you use the code to set your path to the SD CARD if you do not have a SD CARD Android will just store data in INTERNAL STORAGE First declare this variable on the launch Activity

public static String THE_PATH;

Then in the same Activity in the onCreate Bundle call this method onAvail()

    // Is External Storage Available if so use it and desi the path for DBHelper
public void onAvail() {

    String state = Environment.getExternalStorageState();

    if (state.equals(Environment.MEDIA_MOUNTED) && 

(!state.equals(Environment.MEDIA_MOUNTED_READ_ONLY))) {

        File removable = ContextCompat.getExternalFilesDirs(this, null)[1];
        THE_PATH = String.valueOf(removable);
        //System.out.println("EXTERNAL PATH ====> " + THE_PATH);
        THE_PATH = THE_PATH + "/Documents/";
        //System.out.println("new path ====> "+THE_PATH);
    }
}

I hope you have a DBHelper Class here is what happens in that Class

import static <app name here>.MainActivity.THE_PATH;

 // Variable str is set in MainActivity as Public static
// to be accessible in the DBHelper Class 

// which is called from MainAvtivity

public class DBHelper extends SQLiteOpenHelper {

public static final String DB_NAME = THE_PATH +"PassWord";