Trouble Creating a Directory on the SD Card
<p>I am trying to have my app create a directory on the root of the SD Card, if that directory does not already exist. When I run the app, the "Creating Home Directory..." toast notification displays, but the directory is not created... What am i doing wrong?? (P.S. permissions are set for writing to external storage)</p>

<pre><code>public class Main extends Activity {
        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);

     // Check SD Card for Read/Write

            boolean mExternalStorageWriteable = false;
            String state = Environment.getExternalStorageState();

            if (Environment.MEDIA_MOUNTED.equals(state)) {
                // We can read and write the media
                mExternalStorageWriteable = true;
            } else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
                // We can only read the media
                mExternalStorageWriteable = false;
            } else {
                // Something else is wrong. It may be one of many other states, but all we need
                //  to know is we can neither read nor write
                mExternalStorageWriteable = false;
            }

            if (mExternalStorageWriteable == false) {
            //Toast Notification that SD Card is not Accessible 
             Context context = getApplicationContext();
             CharSequence text = "SD Card is NOT Accessable, Please Remount and Try Again";
             int duration = Toast.LENGTH_SHORT;

             Toast toast = Toast.makeText(context, text, duration);
             toast.show();
            } else {
             //Check If Home Dir Exists

             boolean exists = (new File("/AndGuard/")).exists();
             if (exists) {
              Context context = getApplicationContext();
                 CharSequence text = "Accessing Data Files...";
                 int duration = Toast.LENGTH_SHORT;

                 Toast toast = Toast.makeText(context, text, duration);
                 toast.show();

             } else {
              Context context = getApplicationContext();
                 CharSequence text = "Creating Home Directory...";
                 int duration = Toast.LENGTH_SHORT;

                 Toast toast = Toast.makeText(context, text, duration);
                 toast.show();

            // Create a directory; all non-existent ancestor directories are
         // automatically created

           // Create a directory; all non-existent ancestor directories are
         // automatically created
         File root = Environment.getExternalStorageDirectory();
         boolean success = (new File(root,"directoryName")).mkdirs();
         if (!success) {
             // Directory creation failed
         }
             }         
            }
</code></pre>

<p>Here is my Manifest file:</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="soapbox.sym3try.andguard"
      android:versionCode="1"
      android:versionName="1.0"&gt;
          &lt;application android:icon="@drawable/icon" android:label="@string/app_name"&gt;
        &lt;activity android:name=".Main"
                  android:label="@string/app_name"&gt;
      &lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"&gt;&lt;/uses-permission&gt; 
            &lt;intent-filter&gt;
                &lt;action android:name="android.intent.action.MAIN" /&gt;
                &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
            &lt;/intent-filter&gt;
        &lt;/activity&gt;

    &lt;/application&gt;
    &lt;uses-sdk android:minSdkVersion="4" /&gt;


&lt;/manifest&gt; 
</code></pre>

<p>I tried this as well, it didn't work, but it might be a step in the right direction as it creates the directory and populates it with a file from res/raw all in one step:</p>

<pre><code> public boolean saveas(int ressound){
         byte[] buffer=null;
         InputStream fIn = getBaseContext().getResources().openRawResource(ressound);
         int size=0;

         try {
          size = fIn.available();
          buffer = new byte[size];
          fIn.read(buffer);
          fIn.close();
         } catch (IOException e) {
          // TODO Auto-generated catch block
          return false;
         }

         String path="/sdcard/AndGuard/List1";
         String filename="hosts";

         boolean exists = (new File(path)).exists();
         if (!exists){new File(path).mkdirs();}

         FileOutputStream save;
         try {
          save = new FileOutputStream(path+filename);
          save.write(buffer);
          save.flush();
          save.close();
         } catch (FileNotFoundException e) {
          // TODO Auto-generated catch block
          return false;
         } catch (IOException e) {
          // TODO Auto-generated catch block
          return false;
         }
        return exists;    
}
</code></pre>
