How to create sub-folder in SD Card, using Java code

How to create sub-folder in SD Card, using Java code

If you want to create sub-folder in SD Card using Java code, you can use the mkdir() method of java.io.File class.



ex.

      String newFolder = "/myFolder2";
      String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
      File myNewFolder = new File(extStorageDirectory + newFolder);
      myNewFolder.mkdir();

And also, AndroidManifest.xml have to be modify to add permission of "android.permission.WRITE_EXTERNAL_STORAGE"

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.exercise.AndroidNewFolder"
    android:versionCode="1"
    android:versionName="1.0">
  <application android:icon="@drawable/icon" android:label="@string/app_name">
      <activity android:name=".AndroidNewFolder"
                android:label="@string/app_name">
          <intent-filter>
              <action android:name="android.intent.action.MAIN" />
              <category android:name="android.intent.category.LAUNCHER" />
          </intent-filter>
      </activity>

  </application>
  <uses-sdk android:minSdkVersion="4" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
</manifest>

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