Java tutorial
/* * Nextcloud Android client application * * @author Tobias Kaminsky * Copyright (C) 2018 Tobias Kaminsky * Copyright (C) 2018 Nextcloud GmbH. * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * 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 <https://www.gnu.org/licenses/>. */ package com.owncloud.android.ui.trashbin; import android.content.Intent; import android.os.Bundle; import android.support.design.widget.Snackbar; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ImageView; import android.widget.PopupMenu; import android.widget.TextView; import com.owncloud.android.R; import com.owncloud.android.lib.resources.files.TrashbinFile; import com.owncloud.android.ui.EmptyRecyclerView; import com.owncloud.android.ui.activity.FileActivity; import com.owncloud.android.ui.activity.FileDisplayActivity; import com.owncloud.android.ui.adapter.TrashbinListAdapter; import com.owncloud.android.ui.dialog.SortingOrderDialogFragment; import com.owncloud.android.ui.interfaces.TrashbinActivityInterface; import com.owncloud.android.utils.FileSortOrder; import com.owncloud.android.utils.ThemeUtils; import java.util.List; import butterknife.BindString; import butterknife.BindView; import butterknife.ButterKnife; import butterknife.Unbinder; import static com.owncloud.android.db.PreferenceManager.getSortOrder; /** * Presenting trashbin data, received from presenter */ public class TrashbinActivity extends FileActivity implements TrashbinActivityInterface, SortingOrderDialogFragment.OnSortingOrderListener, TrashbinContract.View { @BindView(R.id.empty_list_view_text) public TextView emptyContentMessage; @BindView(R.id.empty_list_view_headline) public TextView emptyContentHeadline; @BindView(R.id.empty_list_icon) public ImageView emptyContentIcon; @BindView(android.R.id.list) public EmptyRecyclerView recyclerView; @BindView(R.id.swipe_containing_list) public SwipeRefreshLayout swipeListRefreshLayout; @BindString(R.string.trashbin_empty_headline) public String noResultsHeadline; @BindString(R.string.trashbin_empty_message) public String noResultsMessage; private Unbinder unbinder; private TrashbinListAdapter trashbinListAdapter; private TrashbinPresenter trashbinPresenter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); trashbinPresenter = new TrashbinPresenter(new RemoteTrashbinRepository(this), this); setContentView(R.layout.trashbin_activity); unbinder = ButterKnife.bind(this); // setup toolbar setupToolbar(); // setup drawer setupDrawer(R.id.nav_trashbin); ThemeUtils.setColoredTitle(getSupportActionBar(), R.string.trashbin_activity_title, this); } @Override protected void onStart() { super.onStart(); setupContent(); } private void setupContent() { recyclerView = findViewById(android.R.id.list); recyclerView.setEmptyView(findViewById(R.id.empty_list_view)); findViewById(R.id.empty_list_progress).setVisibility(View.GONE); emptyContentIcon.setImageResource(R.drawable.ic_delete); emptyContentIcon.setVisibility(View.VISIBLE); emptyContentHeadline.setText(noResultsHeadline); emptyContentMessage.setText(noResultsMessage); emptyContentMessage.setVisibility(View.VISIBLE); trashbinListAdapter = new TrashbinListAdapter(this, getStorageManager(), this); recyclerView.setAdapter(trashbinListAdapter); recyclerView.setHasFixedSize(true); recyclerView.setHasFooter(true); recyclerView.setLayoutManager(new LinearLayoutManager(this)); swipeListRefreshLayout.setOnRefreshListener(this::loadFolder); loadFolder(); } private void loadFolder() { swipeListRefreshLayout.setRefreshing(true); trashbinPresenter.loadFolder(); } @Override public void showFiles(boolean onDeviceOnly) { super.showFiles(onDeviceOnly); Intent i = new Intent(getApplicationContext(), FileDisplayActivity.class); i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(i); } @Override public boolean onOptionsItemSelected(MenuItem item) { boolean retval = true; switch (item.getItemId()) { case android.R.id.home: if (isDrawerOpen()) { closeDrawer(); } else if (trashbinPresenter.isRoot()) { onBackPressed(); } else { openDrawer(); } break; case R.id.action_sort: { FragmentManager fm = getSupportFragmentManager(); FragmentTransaction ft = fm.beginTransaction(); ft.addToBackStack(null); SortingOrderDialogFragment mSortingOrderDialogFragment = SortingOrderDialogFragment .newInstance(getSortOrder(this, null)); mSortingOrderDialogFragment.show(ft, SortingOrderDialogFragment.SORTING_ORDER_FRAGMENT); break; } case R.id.action_empty_trashbin: trashbinPresenter.emptyTrashbin(); break; default: retval = super.onOptionsItemSelected(item); break; } return retval; } @Override public void onDestroy() { super.onDestroy(); unbinder.unbind(); } @Override public void onOverflowIconClicked(TrashbinFile file, View view) { PopupMenu popup = new PopupMenu(this, view); popup.inflate(R.menu.trashbin_actions_menu); popup.setOnMenuItemClickListener(item -> { trashbinPresenter.removeTrashbinFile(file); return true; }); popup.show(); } @Override public void onItemClicked(TrashbinFile file) { if (file.isFolder()) { trashbinPresenter.enterFolder(file.getRemotePath()); mDrawerToggle.setDrawerIndicatorEnabled(false); Toolbar toolbar = findViewById(R.id.toolbar); if (toolbar != null && toolbar.getNavigationIcon() != null) { ThemeUtils.tintDrawable(toolbar.getNavigationIcon(), ThemeUtils.fontColor(this)); } } } @Override public void onRestoreIconClicked(TrashbinFile file, View view) { trashbinPresenter.restoreTrashbinFile(file); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.trashbin_options_menu, menu); return true; } @Override protected void onPause() { super.onPause(); trashbinListAdapter.cancelAllPendingTasks(); } @Override public void onBackPressed() { trashbinPresenter.navigateUp(); } public void close() { super.onBackPressed(); } public void setDrawerIndicatorEnabled(boolean bool) { mDrawerToggle.setDrawerIndicatorEnabled(bool); } @Override public void onSortingOrderChosen(FileSortOrder sortOrder) { trashbinListAdapter.setSortOrder(sortOrder); } @Override public void showTrashbinFolder(List<Object> trashbinFiles) { trashbinListAdapter.setTrashbinFiles(trashbinFiles, true); swipeListRefreshLayout.setRefreshing(false); } @Override public void removeFile(TrashbinFile file) { trashbinListAdapter.removeFile(file); } @Override public void removeAllFiles() { trashbinListAdapter.removeAllFiles(); } @Override public void showSnackbarError(int message, TrashbinFile file) { swipeListRefreshLayout.setRefreshing(false); Snackbar.make(recyclerView, String.format(getString(message), file.getFileName()), Snackbar.LENGTH_LONG) .show(); } @Override public void showError(int message) { swipeListRefreshLayout.setRefreshing(false); if (emptyContentMessage != null) { emptyContentHeadline.setText(R.string.common_error); emptyContentIcon.setImageDrawable(getResources().getDrawable(R.drawable.ic_list_empty_error)); emptyContentMessage.setText(message); emptyContentMessage.setVisibility(View.VISIBLE); emptyContentIcon.setVisibility(View.VISIBLE); } } }