Java tutorial
/** * This file is part of FileSpace for Android, an app for managing your server (files, talks...). * <p/> * Copyright (c) 2014-2015 FileSpace for Android contributors (http://mercandalli.com) * <p/> * LICENSE: * <p/> * FileSpace for Android 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 2 of the License, or (at your option) any * later version. * <p/> * FileSpace for Android 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. * * @author Jonathan Mercandalli * @license http://www.gnu.org/licenses/gpl.html * @copyright 2014-2015 FileSpace for Android contributors (http://mercandalli.com) */ package com.mercandalli.android.apps.files.file.local; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.os.Build; import android.os.Bundle; import android.os.Environment; import android.os.Handler; import android.os.Parcelable; import android.support.annotation.DrawableRes; import android.support.annotation.IntRange; import android.support.annotation.NonNull; import android.support.design.widget.FloatingActionButton; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.GridLayoutManager; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ProgressBar; import android.widget.TextView; import com.mercandalli.android.apps.files.R; import com.mercandalli.android.apps.files.common.animation.ScaleAnimationAdapter; import com.mercandalli.android.apps.files.common.fragment.BackFragment; import com.mercandalli.android.apps.files.common.listener.ResultCallback; import com.mercandalli.android.apps.files.file.FileManager; import com.mercandalli.android.apps.files.file.FileModel; import com.mercandalli.android.apps.files.file.FileModelAdapter; import com.mercandalli.android.apps.files.file.FileModelListener; import com.mercandalli.android.apps.files.file.local.fab.FileLocalFabManager; import com.mercandalli.android.apps.files.main.Config; import com.mercandalli.android.apps.files.settings.SettingsManager; import com.mercandalli.android.library.base.dialog.DialogUtils; import com.mercandalli.android.library.base.event.EventManager; import java.io.File; import java.util.ArrayList; import java.util.List; import static com.mercandalli.android.apps.files.file.FileUtils.createFile; /** * A {@link BackFragment} used to buildDisplay the local {@link FileModel} provide by the * {@link FileLocalApi}. */ public class FileLocalFragment extends BackFragment implements FileLocalPagerFragment.ListController, FileModelAdapter.OnFileClickListener, FileModelAdapter.OnFileLongClickListener, FileModelListener, FileLocalPagerFragment.HomeIconVisible, FileLocalOverflowActions.FileLocalActionCallback, SwipeRefreshLayout.OnRefreshListener, FileLocalPagerFragment.ScrollTop, FileLocalFabManager.FabController { /** * A key for the view pager position. */ @NonNull private static final String ARG_POSITION_IN_VIEW_PAGER = "FileLocalFragment.Args.ARG_POSITION_IN_VIEW_PAGER"; @NonNull public static FileLocalFragment newInstance(final int positionInViewPager) { final FileLocalFragment fileLocalFragment = new FileLocalFragment(); final Bundle args = new Bundle(); args.putInt(ARG_POSITION_IN_VIEW_PAGER, positionInViewPager); fileLocalFragment.setArguments(args); return fileLocalFragment; } private RecyclerView mRecyclerView; @NonNull private final List<FileModel> mFilesList = new ArrayList<>(); private ProgressBar mProgressBar; private FileModel mCurrentDirectory = createInitialDirectory(); private TextView mMessageTextView; private SwipeRefreshLayout mSwipeRefreshLayout; @NonNull private final List<FileModel> mFilesToCutList = new ArrayList<>(); @NonNull private final List<FileModel> mFilesToCopyList = new ArrayList<>(); /* Managers */ private FileManager mFileManager; private FileLocalFabManager mFileLocalFabManager; private FileModelAdapter mFileModelAdapter; private FileLocalOverflowActions mFileLocalOverflowActions; private ScaleAnimationAdapter mScaleAnimationAdapter; private boolean mIsFabAnimating = false; @NonNull private final Handler mHandler = new Handler(); @NonNull private final Runnable mRunnable = new Runnable() { @Override public void run() { mIsFabAnimating = false; } }; private boolean mIsRefreshing = false; private int mPositionInViewPager; private boolean mIsFabHidden; /** * Default Constructor. * <p/> * <p/> * lint [ValidFragment] * http://developer.android.com/reference/android/app/Fragment.html#Fragment() * Every fragment must have an empty constructor, so it can be instantiated when restoring its activity's state. */ public FileLocalFragment() { } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mFileManager = FileManager.getInstance(getContext()); mFileLocalFabManager = FileLocalFabManager.getInstance(); final Bundle args = getArguments(); if (!args.containsKey(ARG_POSITION_IN_VIEW_PAGER)) { throw new IllegalStateException("Missing args. Please use newInstance()"); } mPositionInViewPager = args.getInt(ARG_POSITION_IN_VIEW_PAGER); mFileLocalFabManager.addFabController(mPositionInViewPager, this); } @Override public void onDestroy() { mFileLocalFabManager.removeFabController(mPositionInViewPager); super.onDestroy(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final View rootView = inflater.inflate(R.layout.fragment_file_files, container, false); findViews(rootView); initViews(); refreshCurrentList(); mFileLocalOverflowActions = new FileLocalOverflowActions(getContext(), this); final Context context = getContext(); if (context instanceof AppCompatActivity) { ((AppCompatActivity) context).invalidateOptionsMenu(); } mFileLocalFabManager.updateFabButtons(); return rootView; } @Override public boolean back() { if (hasItemSelected()) { deselectAll(); return true; } else if (!mCurrentDirectory.getFile().getPath().equals(initialPath())) { if (mCurrentDirectory.getFile().getParent() != null) { mCurrentDirectory = new FileModel.FileModelBuilder() .file(new File(mCurrentDirectory.getFile().getParentFile().getPath())).build(); refreshCurrentList(); return true; } } else if (!mFilesToCopyList.isEmpty() || !mFilesToCutList.isEmpty()) { if (!mFilesToCopyList.isEmpty()) { mFilesToCopyList.clear(); } if (!mFilesToCutList.isEmpty()) { mFilesToCutList.clear(); } refreshFab(); return true; } return false; } /** * {@inheritDoc} */ @Override public void onFabClick( final @IntRange(from = 0, to = FileLocalFabManager.NUMBER_MAX_OF_FAB - 1) int fabPosition, final @NonNull FloatingActionButton floatingActionButton) { final Context context = getContext(); switch (fabPosition) { case 0: if ((mFilesToCopyList.size() != 0) || (mFilesToCutList.size() != 0)) { for (final FileModel file : mFilesToCopyList) { mFileManager.copyLocalFile((Activity) context, file, mCurrentDirectory.getFile().getAbsolutePath() + File.separator); } mFilesToCopyList.clear(); for (final FileModel file : mFilesToCutList) { mFileManager.renameLocalByPath(file, mCurrentDirectory.getFile().getAbsolutePath() + File.separator + file.getFullName()); } mFilesToCutList.clear(); refreshCurrentList(); } else { final AlertDialog.Builder menuAlert = new AlertDialog.Builder(context); final String[] menuList = { context.getString(R.string.file_model_local_new_folder_file) }; menuAlert.setTitle(context.getString(R.string.file_model_local_new_title)); menuAlert.setItems(menuList, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int item) { switch (item) { case 0: DialogUtils.prompt(context, context.getString(R.string.file_model_local_new_folder_file), context.getString(R.string.file_model_local_new_folder_file_description), getString(R.string.ok), new DialogUtils.OnDialogUtilsStringListener() { @Override public void onDialogUtilsStringCalledBack(String text) { createFile(mCurrentDirectory.getFile().getPath() + File.separator, text); refreshCurrentList(); } }, getString(android.R.string.cancel), null, null, context.getString(R.string.name)); break; } } }); menuAlert.create().show(); } refreshFab(); break; case 1: if (mCurrentDirectory.getFile() != null && mCurrentDirectory.getFile().getParent() != null) { mCurrentDirectory = new FileModel.FileModelBuilder() .file(new File(mCurrentDirectory.getFile().getParentFile().getPath())).build(); refreshCurrentList(); } refreshFab(); break; } } /** * {@inheritDoc} */ @Override public boolean isFabVisible( final @IntRange(from = 0, to = FileLocalFabManager.NUMBER_MAX_OF_FAB - 1) int fabPosition) { if (mIsFabHidden) { return false; } switch (fabPosition) { case 0: return true; case 1: return mCurrentDirectory != null && mCurrentDirectory.getFile().getParent() != null; } return false; } @DrawableRes @Override public int getFabImageResource( final @IntRange(from = 0, to = FileLocalFabManager.NUMBER_MAX_OF_FAB - 1) int fabPosition) { switch (fabPosition) { case 0: if (!mFilesToCopyList.isEmpty()) { return R.drawable.ic_menu_paste_holo_dark; } else if (!mFilesToCutList.isEmpty()) { return R.drawable.ic_menu_paste_holo_dark; } else { return R.drawable.add; } case 1: return R.drawable.arrow_up; } return R.drawable.add; } @Override public void onFileClick(View view, int position) { /*if (hasItemSelected()) { mFilesList.get(position).selected = !mFilesList.get(position).selected; adapter.notifyItemChanged(position); } else */ if (mFilesList.get(position).isDirectory()) { EventManager.getInstance().sendBasicEvent("key_filespace_folder_local_clicked", "test", "click", "folder", "", this, ""); mCurrentDirectory = new FileModel.FileModelBuilder().file(new File(mFilesList.get(position).getUrl())) .build(); refreshCurrentList(); } else { mFileManager.execute((Activity) getContext(), position, mFilesList, view); } } @Override public boolean onFileLongClick(View view, int position) { /* mFilesList.get(position).selected = !mFilesList.get(position).selected; adapter.notifyItemChanged(position); */ return true; } @Override public void executeFileModel(final FileModel fileModel, final View view) { mFileLocalOverflowActions.show(fileModel, view, Config.isLogged()); } @Override public boolean isHomeVisible() { return !mCurrentDirectory.getUrl().equals(initialPath()); } @Override public void refreshFab() { mFileLocalFabManager.updateFabButtons(); } @Override public void refreshData() { refreshCurrentList(); } @Override public void addCopyFile(FileModel fileModel) { mFilesToCopyList.add(fileModel); } @Override public void addCutFile(FileModel fileModel) { mFilesToCutList.add(fileModel); } @Override public boolean isFileToCut() { return !mFilesToCutList.isEmpty(); } @Override public boolean isFileToCopy() { return !mFilesToCopyList.isEmpty(); } @Override public void clearFileToCut() { mFilesToCutList.clear(); } @Override public void clearFileToCopy() { mFilesToCopyList.clear(); } /** * {@inheritDoc} */ @Override public void refreshCurrentList() { if (mIsRefreshing || mCurrentDirectory == null || !isAdded()) { return; } mIsRefreshing = true; final Context context = getContext(); if (context instanceof AppCompatActivity) { ((AppCompatActivity) context).invalidateOptionsMenu(); } mFilesList.clear(); mProgressBar.setVisibility(View.VISIBLE); mRecyclerView.setVisibility(View.GONE); mMessageTextView.setVisibility(View.GONE); mRecyclerView.scrollToPosition(0); mFileManager.getFiles(mCurrentDirectory, SettingsManager.getInstance(context).isSuperUser(), new ResultCallback<List<FileModel>>() { @Override public void success(final List<FileModel> result) { mFilesList.clear(); mFilesList.addAll(result); if (mFilesList.size() == 0) { mMessageTextView.setText( getString(R.string.no_file_local_folder, "" + mCurrentDirectory.getName())); mMessageTextView.setVisibility(View.VISIBLE); } else { mMessageTextView.setVisibility(View.GONE); } mProgressBar.setVisibility(View.GONE); mRecyclerView.setVisibility(View.VISIBLE); mIsRefreshing = false; updateAdapter(); } @Override public void failure() { mFilesList.clear(); mMessageTextView.setText("Failed to load"); mMessageTextView.setVisibility(View.VISIBLE); mProgressBar.setVisibility(View.GONE); mRecyclerView.setVisibility(View.VISIBLE); mIsRefreshing = false; updateAdapter(); } }); } /** * {@inheritDoc} */ @Override public void updateAdapter() { if (mRecyclerView != null && isAdded()) { refreshFab(); final Parcelable recyclerViewState = mRecyclerView.getLayoutManager().onSaveInstanceState(); mFileModelAdapter.setList(mFilesList); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { mScaleAnimationAdapter = new ScaleAnimationAdapter(mRecyclerView, mFileModelAdapter); mScaleAnimationAdapter.setDuration(220); mScaleAnimationAdapter.setOffsetDuration(32); mRecyclerView.setAdapter(mScaleAnimationAdapter); } mRecyclerView.getLayoutManager().onRestoreInstanceState(recyclerViewState); mSwipeRefreshLayout.setRefreshing(false); } } /** * {@inheritDoc} */ @Override public void onRefresh() { refreshCurrentList(); } /** * {@inheritDoc} */ @Override public void scrollTop() { mRecyclerView.smoothScrollToPosition(0); } public void goHome() { mCurrentDirectory = createInitialDirectory(); this.refreshCurrentList(); } public boolean hasItemSelected() { /* for (FileModel file : mFilesList) if (file.selected) return true; */ return false; } public void deselectAll() { /* for (FileModel file : mFilesList) file.selected = false; */ updateAdapter(); } private void findViews(final View rootView) { mProgressBar = (ProgressBar) rootView.findViewById(R.id.circularProgressBar); mMessageTextView = (TextView) rootView.findViewById(R.id.message); mRecyclerView = (RecyclerView) rootView.findViewById(R.id.fragment_file_files_recycler_view); mSwipeRefreshLayout = (SwipeRefreshLayout) rootView .findViewById(R.id.fragment_file_files_swipe_refresh_layout); } private void initViews() { mProgressBar.setVisibility(View.INVISIBLE); mRecyclerView.setHasFixedSize(true); mSwipeRefreshLayout.setEnabled(true); mSwipeRefreshLayout.setOnRefreshListener(this); mSwipeRefreshLayout.setColorSchemeResources(android.R.color.holo_blue_bright, android.R.color.holo_green_light, android.R.color.holo_orange_light, android.R.color.holo_red_light); final Activity activity = getActivity(); final int nbColumn = activity.getResources().getInteger(R.integer.column_number_card); if (nbColumn <= 1) { mRecyclerView.setLayoutManager(new LinearLayoutManager(activity)); } else { mRecyclerView.setLayoutManager(new GridLayoutManager(activity, nbColumn)); } mFileModelAdapter = new FileModelAdapter(getContext(), mFilesList, this, this, this); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { mScaleAnimationAdapter = new ScaleAnimationAdapter(mRecyclerView, mFileModelAdapter); mScaleAnimationAdapter.setDuration(220); mScaleAnimationAdapter.setOffsetDuration(32); mRecyclerView.setAdapter(mScaleAnimationAdapter); } else { mRecyclerView.setAdapter(mFileModelAdapter); } mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); if (dy <= 0) { if (!mIsFabAnimating) { mIsFabAnimating = true; mIsFabHidden = false; mFileLocalFabManager.updateFabButtons(); mHandler.removeCallbacks(mRunnable); mHandler.postDelayed(mRunnable, 250); } } else { if (!mIsFabAnimating) { mIsFabAnimating = true; mIsFabHidden = true; mFileLocalFabManager.updateFabButtons(); mHandler.removeCallbacks(mRunnable); mHandler.postDelayed(mRunnable, 250); } } } }); } @NonNull protected FileModel createInitialDirectory() { final File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + Config.getLocalFolderName()); if (!file.exists()) { file.mkdir(); } return new FileModel.FileModelBuilder().file(file).build(); } protected String initialPath() { return Environment.getExternalStorageDirectory().getAbsolutePath(); } }