Java tutorial
/* * Copyright (C) 2013 Paul Burke * * 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 python.filechooser; import java.io.File; import java.util.List; import python.listview.JazzyHelper; import python.listview.JazzyListView; import zce.app.sdpath.GetPath; import android.annotation.SuppressLint; import android.app.Activity; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.Loader; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.AbsListView.OnScrollListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.ListView; import android.widget.TextView; /** * Fragment that displays a list of Files in a given path. * * @version 2013-12-11 * @author paulburke (ipaulpro) */ @SuppressLint({ "InlinedApi", "NewApi" }) public class FileListFragment extends ListFragment implements LoaderManager.LoaderCallbacks<List<File>> { /** * Interface to listen for events. */ public interface Callbacks { /** * Called when a file is selected from the list. * * @param file * The file selected */ public void onFileSelected(File file, boolean ok); } private static final int LOADER_ID = 0; private FileListAdapter mAdapter; private String mPath; private Callbacks mListener; private View view; private JazzyListView mList;// private static final int[] effects = { JazzyHelper.STANDARD, JazzyHelper.GROW, JazzyHelper.CARDS, JazzyHelper.CURL, JazzyHelper.WAVE, JazzyHelper.FLIP, JazzyHelper.FLY, JazzyHelper.REVERSE_FLY, JazzyHelper.HELIX, JazzyHelper.FAN, JazzyHelper.TILT, JazzyHelper.ZIPPER, JazzyHelper.FADE, JazzyHelper.TWIRL, JazzyHelper.SLIDE_IN }; /** * Create a new instance with the given file path. * * @param path * The absolute path of the file (directory) to display. * @return A new Fragment with the given file path. */ public static FileListFragment newInstance(String path) { FileListFragment fragment = new FileListFragment(); Bundle args = new Bundle(); args.putString(FileChooserActivity.PATH, path); fragment.setArguments(args); return fragment; } @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mListener = (Callbacks) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement FileListFragment.Callbacks"); } } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mAdapter = new FileListAdapter(getActivity()); mPath = getArguments() != null ? getArguments().getString(FileChooserActivity.PATH) : new GetPath().path(getActivity()).getAbsolutePath(); } @Override public void onActivityCreated(Bundle savedInstanceState) { mList = (JazzyListView) getListView(); mList.setTransitionEffect(getEffects()); mList.setOnScrollListener(scrollListener);// mList.setOnItemLongClickListener(itemLongClickListener);// ((TextView) mList.getEmptyView()).setText(getString(R.string.empty_directory)); setListAdapter(mAdapter); // setListShown(false); getLoaderManager().initLoader(LOADER_ID, null, this); super.onActivityCreated(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub // return super.onCreateView(inflater, container, savedInstanceState); view = inflater.inflate(R.layout.file_list, container, false); return view; } @Override public void onListItemClick(ListView l, View v, int position, long id) { FileListAdapter adapter = (FileListAdapter) l.getAdapter(); if (adapter != null) { File file = (File) adapter.getItem(position); mPath = file.getAbsolutePath(); mListener.onFileSelected(file, false); } } @Override public Loader<List<File>> onCreateLoader(int id, Bundle args) { return new FileLoader(getActivity(), mPath); } @Override public void onLoadFinished(Loader<List<File>> loader, List<File> data) { mAdapter.setListItems(data); // if (isResumed()) // setListShown(true); // else // setListShownNoAnimation(true); } @Override public void onLoaderReset(Loader<List<File>> loader) { mAdapter.clear(); } protected OnItemLongClickListener itemLongClickListener = new OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> a, View v, int position, long id) { FileListAdapter adapter = (FileListAdapter) a.getAdapter(); if (adapter != null) { File file = (File) adapter.getItem(position); mPath = file.getAbsolutePath(); System.out.println(mPath); mListener.onFileSelected(file, true); } return true; } }; protected OnScrollListener scrollListener = new OnScrollListener() { @Override public void onScrollStateChanged(AbsListView view, int scrollState) { switch (scrollState) { case OnScrollListener.SCROLL_STATE_IDLE: // ? // ? if (mList.getLastVisiblePosition() > (mList.getCount() - 2)) { mList.setTransitionEffect(getEffects()); } // ? if (mList.getFirstVisiblePosition() < 2) { mList.setTransitionEffect(getEffects()); } } } @Override public void onScroll(AbsListView absListView, int firstVisibleItem, int visibleItemCount, int totalItemCount) { } }; public int getEffects() { return effects[(int) (Math.random() * effects.length)]; } }