Java tutorial
/* * Copyright (C) 2014 Arpit Khurana <arpitkh96@gmail.com>, Vishal Nehra <vishalmeham2@gmail.com>, * Emmanuel Messulam<emmanuelbendavid@gmail.com> * * This file is part of Amaze File Manager. * * Amaze File Manager 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 <http://www.gnu.org/licenses/>. */ package com.amaze.filemanager.fragments; import android.content.ComponentName; import android.content.Intent; import android.content.ServiceConnection; import android.content.SharedPreferences; import android.graphics.drawable.ColorDrawable; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.IBinder; import android.preference.PreferenceManager; import android.support.annotation.ColorInt; import android.support.annotation.Nullable; import android.support.design.widget.AppBarLayout; import android.support.v4.app.Fragment; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.ActionMode; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.widget.TextView; import android.widget.Toast; import com.amaze.filemanager.R; import com.amaze.filemanager.activities.MainActivity; import com.amaze.filemanager.activities.superclasses.BasicActivity; import com.amaze.filemanager.adapters.CompressedExplorerAdapter; import com.amaze.filemanager.adapters.data.CompressedObjectParcelable; import com.amaze.filemanager.asynchronous.asynctasks.DeleteTask; import com.amaze.filemanager.asynchronous.services.ExtractService; import com.amaze.filemanager.filesystem.HybridFileParcelable; import com.amaze.filemanager.filesystem.compressed.CompressedHelper; import com.amaze.filemanager.filesystem.compressed.showcontents.Decompressor; import com.amaze.filemanager.fragments.preference_fragments.PreferencesConstants; import com.amaze.filemanager.ui.colors.ColorPreferenceHelper; import com.amaze.filemanager.ui.views.DividerItemDecoration; import com.amaze.filemanager.ui.views.FastScroller; import com.amaze.filemanager.utils.BottomBarButtonPath; import com.amaze.filemanager.utils.OpenMode; import com.amaze.filemanager.utils.Utils; import com.amaze.filemanager.utils.files.FileUtils; import com.amaze.filemanager.utils.provider.UtilitiesProvider; import com.amaze.filemanager.utils.theme.AppTheme; import com.github.junrar.Archive; import java.io.File; import java.util.ArrayList; import java.util.Calendar; import java.util.List; import static com.amaze.filemanager.filesystem.compressed.CompressedHelper.SEPARATOR; import static com.amaze.filemanager.fragments.preference_fragments.PreferencesConstants.PREFERENCE_COLORED_NAVIGATION; public class CompressedExplorerFragment extends Fragment implements BottomBarButtonPath { public static final String KEY_PATH = "path"; private static final String KEY_CACHE_FILES = "cache_files"; private static final String KEY_URI = "uri"; private static final String KEY_FILE = "file"; private static final String KEY_WHOLE_LIST = "whole_list"; private static final String KEY_ELEMENTS = "elements"; private static final String KEY_OPEN = "is_open"; public File compressedFile; /** * files to be deleted from cache * with a Map maintaining key - the root of directory created (for deletion purposes after we exit out of here * and value - the path of file to open */ public ArrayList<HybridFileParcelable> files; public boolean selection = false; public String relativeDirectory = "";//Normally this would be "/" but for pathing issues it isn't public @ColorInt int accentColor, iconskin; public String year; public CompressedExplorerAdapter compressedExplorerAdapter; public ActionMode mActionMode; public boolean coloriseIcons, showSize, showLastModified, gobackitem; public Archive archive; public ArrayList<CompressedObjectParcelable> elements = new ArrayList<>(); public MainActivity mainActivity; public RecyclerView listView; public SwipeRefreshLayout swipeRefreshLayout; public boolean isOpen = false; // flag states whether to open file after service extracts it private UtilitiesProvider utilsProvider; private Decompressor decompressor; private View rootView; private boolean addheader = true; private LinearLayoutManager mLayoutManager; private DividerItemDecoration dividerItemDecoration; private boolean showDividers; private View mToolbarContainer; private boolean stopAnims = true; private int file = 0, folder = 0; @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); utilsProvider = ((BasicActivity) getActivity()).getUtilsProvider(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { rootView = inflater.inflate(R.layout.main_frag, container, false); mainActivity = (MainActivity) getActivity(); listView = rootView.findViewById(R.id.listView); listView.setOnTouchListener((view, motionEvent) -> { if (stopAnims && !compressedExplorerAdapter.stoppedAnimation) { stopAnim(); } compressedExplorerAdapter.stoppedAnimation = true; stopAnims = false; return false; }); swipeRefreshLayout = rootView.findViewById(R.id.activity_main_swipe_refresh_layout); swipeRefreshLayout.setOnRefreshListener(this::refresh); return rootView; } public void stopAnim() { for (int j = 0; j < listView.getChildCount(); j++) { View v = listView.getChildAt(j); if (v != null) v.clearAnimation(); } } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity()); compressedFile = new File(Uri.parse(getArguments().getString(KEY_PATH)).getPath()); mToolbarContainer = mainActivity.getAppbar().getAppbarLayout(); mToolbarContainer.setOnTouchListener((view, motionEvent) -> { if (stopAnims) { if ((!compressedExplorerAdapter.stoppedAnimation)) { stopAnim(); } compressedExplorerAdapter.stoppedAnimation = true; } stopAnims = false; return false; }); listView.setVisibility(View.VISIBLE); mLayoutManager = new LinearLayoutManager(getActivity()); listView.setLayoutManager(mLayoutManager); if (utilsProvider.getAppTheme().equals(AppTheme.DARK)) { rootView.setBackgroundColor(Utils.getColor(getContext(), R.color.holo_dark_background)); } else if (utilsProvider.getAppTheme().equals(AppTheme.BLACK)) { listView.setBackgroundColor(Utils.getColor(getContext(), android.R.color.black)); } else { listView.setBackgroundColor(Utils.getColor(getContext(), android.R.color.background_light)); } gobackitem = sp.getBoolean(PreferencesConstants.PREFERENCE_SHOW_GOBACK_BUTTON, false); coloriseIcons = sp.getBoolean(PreferencesConstants.PREFERENCE_COLORIZE_ICONS, true); showSize = sp.getBoolean(PreferencesConstants.PREFERENCE_SHOW_FILE_SIZE, false); showLastModified = sp.getBoolean(PreferencesConstants.PREFERENCE_SHOW_LAST_MODIFIED, true); showDividers = sp.getBoolean(PreferencesConstants.PREFERENCE_SHOW_DIVIDERS, true); year = ("" + Calendar.getInstance().get(Calendar.YEAR)).substring(2, 4); accentColor = mainActivity.getAccent(); iconskin = mainActivity.getCurrentColorPreference().iconSkin; //mainActivity.findViewById(R.id.buttonbarframe).setBackgroundColor(Color.parseColor(skin)); if (savedInstanceState == null && compressedFile != null) { files = new ArrayList<>(); // adding a cache file to delete where any user interaction elements will be cached String fileName = compressedFile.getName().substring(0, compressedFile.getName().lastIndexOf(".")); String path = getActivity().getExternalCacheDir().getPath() + SEPARATOR + fileName; files.add(new HybridFileParcelable(path)); decompressor = CompressedHelper.getCompressorInstance(getContext(), compressedFile); changePath(""); } else { onRestoreInstanceState(savedInstanceState); } mainActivity.supportInvalidateOptionsMenu(); } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putParcelableArrayList(KEY_ELEMENTS, elements); outState.putString(KEY_PATH, relativeDirectory); outState.putString(KEY_URI, compressedFile.getPath()); outState.putString(KEY_FILE, compressedFile.getPath()); outState.putParcelableArrayList(KEY_CACHE_FILES, files); outState.putBoolean(KEY_OPEN, isOpen); } private void onRestoreInstanceState(Bundle savedInstanceState) { compressedFile = new File(Uri.parse(savedInstanceState.getString(KEY_URI)).getPath()); files = savedInstanceState.getParcelableArrayList(KEY_CACHE_FILES); isOpen = savedInstanceState.getBoolean(KEY_OPEN); elements = savedInstanceState.getParcelableArrayList(KEY_ELEMENTS); relativeDirectory = savedInstanceState.getString(KEY_PATH, ""); decompressor = CompressedHelper.getCompressorInstance(getContext(), compressedFile); createViews(elements, relativeDirectory); } public ActionMode.Callback mActionModeCallback = new ActionMode.Callback() { private void hideOption(int id, Menu menu) { MenuItem item = menu.findItem(id); item.setVisible(false); } private void showOption(int id, Menu menu) { MenuItem item = menu.findItem(id); item.setVisible(true); } View v; // called when the action mode is created; startActionMode() was called public boolean onCreateActionMode(ActionMode mode, Menu menu) { // Inflate a menu resource providing context menu items MenuInflater inflater = mode.getMenuInflater(); v = getActivity().getLayoutInflater().inflate(R.layout.actionmode, null); mode.setCustomView(v); // assumes that you have "contexual.xml" menu resources inflater.inflate(R.menu.contextual, menu); hideOption(R.id.cpy, menu); hideOption(R.id.cut, menu); hideOption(R.id.delete, menu); hideOption(R.id.addshortcut, menu); hideOption(R.id.share, menu); hideOption(R.id.openwith, menu); showOption(R.id.all, menu); hideOption(R.id.compress, menu); hideOption(R.id.hide, menu); showOption(R.id.ex, menu); mode.setTitle(getString(R.string.select)); mainActivity .updateViews(new ColorDrawable(Utils.getColor(getContext(), R.color.holo_dark_action_mode))); if (Build.VERSION.SDK_INT >= 21) { Window window = getActivity().getWindow(); if (mainActivity.getBoolean(PREFERENCE_COLORED_NAVIGATION)) window.setNavigationBarColor(Utils.getColor(getContext(), android.R.color.black)); } if (Build.VERSION.SDK_INT < 19) { mainActivity.getAppbar().getToolbar().setVisibility(View.GONE); } return true; } // the following method is called each time // the action mode is shown. Always called after // onCreateActionMode, but // may be called multiple times if the mode is invalidated. public boolean onPrepareActionMode(ActionMode mode, Menu menu) { ArrayList<Integer> positions = compressedExplorerAdapter.getCheckedItemPositions(); ((TextView) v.findViewById(R.id.item_count)).setText(positions.size() + ""); menu.findItem(R.id.all) .setTitle(positions.size() == folder + file ? R.string.deselect_all : R.string.selectall); return false; // Return false if nothing is done } // called when the user selects a contextual menu item public boolean onActionItemClicked(ActionMode mode, MenuItem item) { switch (item.getItemId()) { case R.id.all: ArrayList<Integer> positions = compressedExplorerAdapter.getCheckedItemPositions(); boolean shouldDeselectAll = positions.size() != folder + file; compressedExplorerAdapter.toggleChecked(shouldDeselectAll); mode.invalidate(); item.setTitle(shouldDeselectAll ? R.string.deselect_all : R.string.selectall); if (!shouldDeselectAll) { selection = false; mActionMode.finish(); mActionMode = null; } return true; case R.id.ex: Toast.makeText(getActivity(), getString(R.string.extracting), Toast.LENGTH_SHORT).show(); String[] dirs = new String[compressedExplorerAdapter.getCheckedItemPositions().size()]; for (int i = 0; i < dirs.length; i++) { dirs[i] = elements.get(compressedExplorerAdapter.getCheckedItemPositions().get(i)).path; } decompressor.decompress(compressedFile.getPath(), dirs); mode.finish(); return true; } return false; } @Override public void onDestroyActionMode(ActionMode actionMode) { if (compressedExplorerAdapter != null) compressedExplorerAdapter.toggleChecked(false); @ColorInt int primaryColor = ColorPreferenceHelper.getPrimary(mainActivity.getCurrentColorPreference(), MainActivity.currentTab); selection = false; mainActivity.updateViews(new ColorDrawable(primaryColor)); if (Build.VERSION.SDK_INT >= 21) { Window window = getActivity().getWindow(); if (mainActivity.getBoolean(PREFERENCE_COLORED_NAVIGATION)) window.setNavigationBarColor(mainActivity.skinStatusBar); } mActionMode = null; } }; @Override public void onDestroyView() { super.onDestroyView(); mainActivity.supportInvalidateOptionsMenu(); // needed to remove any extracted file from cache, when onResume was not called // in case of opening any unknown file inside the zip if (files.get(0).exists()) { new DeleteTask(getActivity().getContentResolver(), getActivity(), this).execute(files); } } @Override public void onResume() { super.onResume(); mainActivity.floatingActionButton.getMenuButton().hide(); Intent intent = new Intent(getActivity(), ExtractService.class); getActivity().bindService(intent, mServiceConnection, 0); } @Override public void onPause() { super.onPause(); getActivity().unbindService(mServiceConnection); } private ServiceConnection mServiceConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { } @Override public void onServiceDisconnected(ComponentName name) { // open file if pending if (isOpen) { // open most recent entry added to files to be deleted from cache File cacheFile = new File(files.get(files.size() - 1).getPath()); if (cacheFile.exists()) { FileUtils.openFile(cacheFile, mainActivity, mainActivity.getPrefs()); } // reset the flag and cache file, as it's root is already in the list for deletion isOpen = false; files.remove(files.size() - 1); } } }; @Override public void changePath(String folder) { if (folder == null) folder = ""; if (folder.startsWith("/")) folder = folder.substring(1); boolean addGoBackItem = gobackitem && !isRoot(folder); String finalfolder = folder; decompressor.changePath(folder, addGoBackItem, data -> { elements = data; createViews(elements, finalfolder); swipeRefreshLayout.setRefreshing(false); updateBottomBar(); }).execute(); updateBottomBar(); } @Override public String getPath() { if (!isRootRelativePath()) return SEPARATOR + relativeDirectory; else return ""; } @Override public int getRootDrawable() { return R.drawable.ic_compressed_white_24dp; } private void refresh() { changePath(relativeDirectory); } private void updateBottomBar() { String path = !isRootRelativePath() ? compressedFile.getName() + SEPARATOR + relativeDirectory : compressedFile.getName(); mainActivity.getAppbar().getBottomBar().updatePath(path, false, null, OpenMode.FILE, folder, file, this); } private void createViews(List<CompressedObjectParcelable> items, String dir) { if (compressedExplorerAdapter == null) { compressedExplorerAdapter = new CompressedExplorerAdapter(getActivity(), utilsProvider, items, this, decompressor); listView.setAdapter(compressedExplorerAdapter); } else { compressedExplorerAdapter.generateZip(items); } folder = 0; file = 0; for (CompressedObjectParcelable item : items) { if (item.type == CompressedObjectParcelable.TYPE_GOBACK) continue; if (item.directory) folder++; else file++; } stopAnims = true; if (!addheader) { listView.removeItemDecoration(dividerItemDecoration); //listView.removeItemDecoration(headersDecor); addheader = true; } else { dividerItemDecoration = new DividerItemDecoration(getActivity(), true, showDividers); listView.addItemDecoration(dividerItemDecoration); //headersDecor = new StickyRecyclerHeadersDecoration(compressedExplorerAdapter); //listView.addItemDecoration(headersDecor); addheader = false; } final FastScroller fastScroller = rootView.findViewById(R.id.fastscroll); fastScroller.setRecyclerView(listView, 1); fastScroller.setPressedHandleColor(mainActivity.getAccent()); ((AppBarLayout) mToolbarContainer).addOnOffsetChangedListener((appBarLayout, verticalOffset) -> { fastScroller.updateHandlePosition(verticalOffset, 112); }); listView.stopScroll(); relativeDirectory = dir; updateBottomBar(); swipeRefreshLayout.setRefreshing(false); } public boolean canGoBack() { return !isRootRelativePath(); } public void goBack() { changePath(new File(relativeDirectory).getParent()); } private boolean isRootRelativePath() { return isRoot(relativeDirectory); } private boolean isRoot(String folder) { return folder == null || folder.isEmpty(); } }