If you check out the files in your phone, you'll see several folders in the root directory. Usually you have a Downloads folder, a Music folder, and sometimes, there are custom folders created by your apps. How can you do this? Here are some steps to make a folder and to put a txt file in it.
1.) Create a File object for the directory:
exampleDirectory = new File("/sdcard/foldername/");
2.) Make that File object build the directory structure with the built in mkdrs() method:
example Directory.mkdirs();
3.) Create a File object for the output file, and attach the OutputStream to the file. You have to put this in a try and catch method to make Android happy:
File outputFile = new File(exampleDirectory, astringorfileyoucreated+".txt");
try {
FileOutputStream fos = new FileOutputStream(outputFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
try {
FileOutputStream fos = new FileOutputStream(outputFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
4.) Add these permissions to your manifest:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
That is all there is to it. Try it and check out that nice new folder in your root directory.
