src/com/android/dreams/phototable/FlipperDreamSettings.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.dreams.phototable;

import android.content.SharedPreferences;
import android.app.ListActivity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.ListAdapter;

import java.util.LinkedList;

/**
 * Settings panel for photo flipping dream.
 */
public class FlipperDreamSettings extends ListActivity {
    private static final String TAG = "FlipperDreamSettings";
    public static final String PREFS_NAME = FlipperDream.TAG;

    private PhotoSourcePlexor mPhotoSource;
    private ListAdapter mAdapter;
    private SharedPreferences mSettings;

    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);

        mSettings = getSharedPreferences(PREFS_NAME, 0);
        mPhotoSource = new PhotoSourcePlexor(this, mSettings);
        setContentView(R.layout.settingslist);

        new AsyncTask<Void, Void, Void>() {
            @Override
            public Void doInBackground(Void... unused) {
                mAdapter = new SectionedAlbumDataAdapter(FlipperDreamSettings.this,
                        mSettings,
                        R.layout.header,
                        R.layout.album,
                        new LinkedList<PhotoSource.AlbumData>(mPhotoSource.findAlbums()));
                return null;
            }

           @Override
           public void onPostExecute(Void unused) {
               setListAdapter(mAdapter);
               if (mAdapter.getCount() == 0) {
                   findViewById(android.R.id.empty).setVisibility(View.GONE);
               }
           }
        }.execute();
    }
}