Java tutorial
/** * ownCloud Android client application * * @author masensio * @author David A. Velasco * Copyright (C) 2015 ownCloud Inc. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * */ package com.owncloud.android.ui.fragment; import android.accounts.Account; import android.app.Activity; import android.graphics.Bitmap; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import com.owncloud.android.R; import com.owncloud.android.authentication.AccountUtils; import com.owncloud.android.datamodel.OCFile; import com.owncloud.android.datamodel.ThumbnailsCacheManager; import com.owncloud.android.lib.common.utils.Log_OC; import com.owncloud.android.lib.resources.shares.OCShare; import com.owncloud.android.ui.activity.FileActivity; import com.owncloud.android.ui.activity.ShareActivity; import com.owncloud.android.ui.adapter.ShareUserListAdapter; import com.owncloud.android.utils.DisplayUtils; import com.owncloud.android.utils.MimetypeIconUtil; import java.util.ArrayList; /** * Fragment for Sharing a file with sharees (users or groups) * * A simple {@link Fragment} subclass. * * Activities that contain this fragment must implement the * {@link ShareFileFragment.OnShareFragmentInteractionListener} interface * to handle interaction events. * * Use the {@link ShareFileFragment#newInstance} factory method to * create an instance of this fragment. */ public class ShareFileFragment extends Fragment implements ShareUserListAdapter.ShareUserAdapterListener { private static final String TAG = ShareFileFragment.class.getSimpleName(); // the fragment initialization parameters private static final String ARG_FILE = "FILE"; private static final String ARG_ACCOUNT = "ACCOUNT"; // Parameters private OCFile mFile; private Account mAccount; // other members private ArrayList<OCShare> mShares; private ShareUserListAdapter mUserGroupsAdapter = null; private OnShareFragmentInteractionListener mListener; /** * Public factory method to create new ShareFileFragment instances. * * @param fileToShare An {@link OCFile} to show in the fragment * @param account An ownCloud account * @return A new instance of fragment ShareFileFragment. */ public static ShareFileFragment newInstance(OCFile fileToShare, Account account) { ShareFileFragment fragment = new ShareFileFragment(); Bundle args = new Bundle(); args.putParcelable(ARG_FILE, fileToShare); args.putParcelable(ARG_ACCOUNT, account); fragment.setArguments(args); return fragment; } public ShareFileFragment() { // Required empty public constructor } /** * {@inheritDoc} */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (getArguments() != null) { mFile = getArguments().getParcelable(ARG_FILE); mAccount = getArguments().getParcelable(ARG_ACCOUNT); } } /** * {@inheritDoc} */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment View view = inflater.inflate(R.layout.share_file_layout, container, false); // Setup layout // Image ImageView icon = (ImageView) view.findViewById(R.id.shareFileIcon); icon.setImageResource(MimetypeIconUtil.getFileTypeIconId(mFile.getMimetype(), mFile.getFileName())); if (mFile.isImage()) { String remoteId = String.valueOf(mFile.getRemoteId()); Bitmap thumbnail = ThumbnailsCacheManager.getBitmapFromDiskCache(remoteId); if (thumbnail != null) { icon.setImageBitmap(thumbnail); } } // Name TextView filename = (TextView) view.findViewById(R.id.shareFileName); filename.setText(mFile.getFileName()); // Size TextView size = (TextView) view.findViewById(R.id.shareFileSize); if (mFile.isFolder()) { size.setVisibility(View.GONE); } else { size.setText(DisplayUtils.bytesToHumanReadable(mFile.getFileLength())); } // Add User Button Button addUserGroupButton = (Button) view.findViewById(R.id.addUserButton); addUserGroupButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { boolean shareWithUsersEnable = AccountUtils.hasSearchUsersSupport(mAccount); if (shareWithUsersEnable) { // Show Search Fragment mListener.showSearchUsersAndGroups(); } else { String message = getString(R.string.share_sharee_unavailable); Toast.makeText(getActivity(), message, Toast.LENGTH_LONG).show(); } } }); return view; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // Load data into the list refreshUsersOrGroupsListFromDB(); } @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mListener = (OnShareFragmentInteractionListener) activity; } catch (ClassCastException e) { throw new ClassCastException( activity.toString() + " must implement OnShareFragmentInteractionListener"); } } @Override public void onDetach() { super.onDetach(); mListener = null; } /** * Get users and groups from the DB to fill in the "share with" list * * Depends on the parent Activity provides a {@link com.owncloud.android.datamodel.FileDataStorageManager} * instance ready to use. If not ready, does nothing. */ public void refreshUsersOrGroupsListFromDB() { if (((FileActivity) mListener).getStorageManager() != null) { // Get Users and Groups mShares = ((FileActivity) mListener).getStorageManager().getSharesWithForAFile(mFile.getRemotePath(), mAccount.name); // Update list of users/groups updateListOfUserGroups(); } } private void updateListOfUserGroups() { // Update list of users/groups // TODO Refactoring: create a new {@link ShareUserListAdapter} instance with every call should not be needed mUserGroupsAdapter = new ShareUserListAdapter(getActivity(), R.layout.share_user_item, mShares, this); // Show data TextView noShares = (TextView) getView().findViewById(R.id.shareNoUsers); ListView usersList = (ListView) getView().findViewById(R.id.shareUsersList); if (mShares.size() > 0) { noShares.setVisibility(View.GONE); usersList.setVisibility(View.VISIBLE); usersList.setAdapter(mUserGroupsAdapter); } else { noShares.setVisibility(View.VISIBLE); usersList.setVisibility(View.GONE); } } @Override public void unshareButtonPressed(OCShare share) { // Unshare mListener.unshareWith(share); Log_OC.d(TAG, "Unshare - " + share.getSharedWithDisplayName()); } /** * This interface must be implemented by activities that contain this * fragment to allow an interaction in this fragment to be communicated * to the activity and potentially other fragments contained in that * activity. * <p/> * See the Android Training lesson <a href= * "http://developer.android.com/training/basics/fragments/communicating.html" * >Communicating with Other Fragments</a> for more information. */ public interface OnShareFragmentInteractionListener { void showSearchUsersAndGroups(); void refreshUsersOrGroupsListFromServer(); void unshareWith(OCShare share); } }