Android Open Source - Android-Universal-Image-Loader Abs List View Base Fragment

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Apache License

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Java Source Code

/*******************************************************************************
 * Copyright 2011-2014 Sergey Tarasevich
 *// www  . j  a va 2  s  .  c om
 * 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.nostra13.universalimageloader.sample.fragment;

import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.AbsListView;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.listener.PauseOnScrollListener;
import com.nostra13.universalimageloader.sample.Constants;
import com.nostra13.universalimageloader.sample.R;
import com.nostra13.universalimageloader.sample.activity.SimpleImageActivity;

/**
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 */
public abstract class AbsListViewBaseFragment extends BaseFragment {

  protected static final String STATE_PAUSE_ON_SCROLL = "STATE_PAUSE_ON_SCROLL";
  protected static final String STATE_PAUSE_ON_FLING = "STATE_PAUSE_ON_FLING";

  protected AbsListView listView;

  protected boolean pauseOnScroll = false;
  protected boolean pauseOnFling = true;

  @Override
  public void onResume() {
    super.onResume();
    applyScrollListener();
  }

  @Override
  public void onPrepareOptionsMenu(Menu menu) {
    MenuItem pauseOnScrollItem = menu.findItem(R.id.item_pause_on_scroll);
    pauseOnScrollItem.setVisible(true);
    pauseOnScrollItem.setChecked(pauseOnScroll);

    MenuItem pauseOnFlingItem = menu.findItem(R.id.item_pause_on_fling);
    pauseOnFlingItem.setVisible(true);
    pauseOnFlingItem.setChecked(pauseOnFling);
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
      case R.id.item_pause_on_scroll:
        pauseOnScroll = !pauseOnScroll;
        item.setChecked(pauseOnScroll);
        applyScrollListener();
        return true;
      case R.id.item_pause_on_fling:
        pauseOnFling = !pauseOnFling;
        item.setChecked(pauseOnFling);
        applyScrollListener();
        return true;
      default:
        return super.onOptionsItemSelected(item);
    }
  }

  protected void startImagePagerActivity(int position) {
    Intent intent = new Intent(getActivity(), SimpleImageActivity.class);
    intent.putExtra(Constants.Extra.FRAGMENT_INDEX, ImagePagerFragment.INDEX);
    intent.putExtra(Constants.Extra.IMAGE_POSITION, position);
    startActivity(intent);
  }

  private void applyScrollListener() {
    listView.setOnScrollListener(new PauseOnScrollListener(ImageLoader.getInstance(), pauseOnScroll, pauseOnFling));
  }
}

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