Isso é simples, mas não está funcionando. Estou tentando criar um arquivo temporário (posteriormente um arquivo de armazenamento permanente) para a visualização de um arquivo MP3. Eu tentei as seguintes variantes do sufixo da seguinte forma:

public class StudyFileIo extends Activity {
    private static final String TAG = "StudyFileIo";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        try {
            File tempFooFile = File
            .createTempFile("foo", "dat");
            Log.i(TAG, tempFooFile.getAbsolutePath());
        } catch (IOException e) {
            Log.e(TAG, e.toString());
            e.printStackTrace();
        }

    }
}

Registro:

09-07 11:25:20.299 E/StudyFileIo( 8859): java.io.IOException: Permission denied
09-07 11:25:20.299 W/System.err( 8859): java.io.IOException: Permission denied
09-07 11:25:20.299 W/System.err( 8859):     at java.io.File.createNewFileImpl(Native Method)
09-07 11:25:20.299 W/System.err( 8859):     at java.io.File.createNewFile(File.java:1160)
09-07 11:25:20.299 W/System.err( 8859):     at java.io.File.createTempFile(File.java:1224)
09-07 11:25:20.299 W/System.err( 8859):     at java.io.File.createTempFile(File.java:1182)
09-07 11:25:20.299 W/System.err( 8859):     at com.mobibob.studyfileio.StudyFileIo.onCreate(StudyFileIo.java:25)
09-07 11:25:20.299 W/System.err( 8859):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-07 11:25:20.299 W/System.err( 8859):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
09-07 11:25:20.309 W/System.err( 8859):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
09-07 11:25:20.309 W/System.err( 8859):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
09-07 11:25:20.309 W/System.err( 8859):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
09-07 11:25:20.309 W/System.err( 8859):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-07 11:25:20.309 W/System.err( 8859):     at android.os.Looper.loop(Looper.java:123)
09-07 11:25:20.309 W/System.err( 8859):     at android.app.ActivityThread.main(ActivityThread.java:4627)
09-07 11:25:20.309 W/System.err( 8859):     at java.lang.reflect.Method.invokeNative(Native Method)
09-07 11:25:20.309 W/System.err( 8859):     at java.lang.reflect.Method.invoke(Method.java:521)
09-07 11:25:20.319 W/System.err( 8859):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:876)
09-07 11:25:20.319 W/System.err( 8859):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:634)
09-07 11:25:20.319 W/System.err( 8859):     at dalvik.system.NativeStart.main(Native Method)

Há alguma configuração AndroidManifest.xml que estou ausente (estou usando o manifesto padrão)?