Java tutorial
/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ package org.libreoffice.ui; import android.app.Activity; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.database.DataSetObserver; import android.net.Uri; import android.os.AsyncTask; import android.os.Bundle; import android.os.Handler; import android.preference.PreferenceManager; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.util.Log; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.View.OnLongClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.GridView; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import org.libreoffice.LOAbout; import org.libreoffice.LibreOfficeMainActivity; import org.libreoffice.R; import org.libreoffice.SettingsActivity; import org.libreoffice.storage.DocumentProviderFactory; import org.libreoffice.storage.DocumentProviderSettingsActivity; import org.libreoffice.storage.IDocumentProvider; import org.libreoffice.storage.IFile; import java.io.File; import java.io.FileFilter; import java.io.FilenameFilter; import java.net.URI; import java.net.URISyntaxException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; public class LibreOfficeUIActivity extends AppCompatActivity implements ActionBar.OnNavigationListener { private String LOGTAG = LibreOfficeUIActivity.class.getSimpleName(); private SharedPreferences prefs; private int filterMode = FileUtilities.ALL; private int viewMode; private int sortMode; FileFilter fileFilter; FilenameFilter filenameFilter; private List<IFile> filePaths; private DocumentProviderFactory documentProviderFactory; private IDocumentProvider documentProvider; private IFile homeDirectory; private IFile currentDirectory; private static final String CURRENT_DIRECTORY_KEY = "CURRENT_DIRECTORY"; private static final String DOC_PROIVDER_KEY = "CURRENT_DOCUMENT_PROVIDER"; private static final String FILTER_MODE_KEY = "FILTER_MODE"; public static final String EXPLORER_VIEW_TYPE_KEY = "EXPLORER_VIEW_TYPE"; public static final String EXPLORER_PREFS_KEY = "EXPLORER_PREFS"; public static final String SORT_MODE_KEY = "SORT_MODE"; public static final int GRID_VIEW = 0; public static final int LIST_VIEW = 1; private DrawerLayout drawerLayout; private ListView drawerList; private ActionBarDrawerToggle drawerToggle; GridView gv; ListView lv; private final LOAbout mAbout; private boolean canQuit = false; public LibreOfficeUIActivity() { mAbout = new LOAbout(this, true); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // initialize document provider factory DocumentProviderFactory.initialize(this); documentProviderFactory = DocumentProviderFactory.getInstance(); PreferenceManager.setDefaultValues(this, R.xml.documentprovider_preferences, false); readPreferences(); // init UI and populate with contents from the provider createUI(); switchToDocumentProvider(documentProviderFactory.getDefaultProvider()); } public void createUI() { setContentView(R.layout.activity_document_browser); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); ActionBar actionBar = getSupportActionBar(); actionBar.setDisplayShowTitleEnabled(false); //This should show current directory if anything actionBar.setDisplayHomeAsUpEnabled(true); //make the navigation spinner Context context = actionBar.getThemedContext(); ArrayAdapter<CharSequence> list = ArrayAdapter.createFromResource(context, R.array.file_view_modes, android.R.layout.simple_spinner_item); list.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST); actionBar.setListNavigationCallbacks(list, this); LinearLayout content = (LinearLayout) findViewById(R.id.browser_main_content); if (viewMode == GRID_VIEW) { // code to make a grid view getLayoutInflater().inflate(R.layout.file_grid, content); gv = (GridView) findViewById(R.id.file_explorer_grid_view); gv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { open(position); } }); actionBar.setSelectedNavigationItem(filterMode + 1);//This triggers the listener which modifies the view. registerForContextMenu(gv); } else { getLayoutInflater().inflate(R.layout.file_list, content); lv = (ListView) findViewById(R.id.file_explorer_list_view); lv.setClickable(true); actionBar.setSelectedNavigationItem(filterMode + 1); registerForContextMenu(lv); } // setup the drawer drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); drawerList = (ListView) findViewById(R.id.left_drawer); drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.document_locations, R.string.close_document_locations) { @Override public void onDrawerOpened(View drawerView) { super.onDrawerOpened(drawerView); supportInvalidateOptionsMenu(); drawerList.requestFocus(); // Make keypad navigation easier } @Override public void onDrawerClosed(View drawerView) { super.onDrawerClosed(drawerView); supportInvalidateOptionsMenu(); } }; drawerToggle.setDrawerIndicatorEnabled(true); drawerLayout.setDrawerListener(drawerToggle); drawerToggle.syncState(); // Set the adapter for the list view drawerList.setAdapter( new ArrayAdapter<String>(this, R.layout.item_in_drawer, documentProviderFactory.getNames())); // Set the list's click listener drawerList.setOnItemClickListener(new ListView.OnItemClickListener() { @Override public void onItemClick(AdapterView parent, View view, int position, long id) { switchToDocumentProvider(documentProviderFactory.getProvider(position)); } }); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); drawerToggle.syncState(); } private void refreshView() { // enable home icon as "up" if required if (!currentDirectory.equals(homeDirectory)) { drawerToggle.setDrawerIndicatorEnabled(false); } else { drawerToggle.setDrawerIndicatorEnabled(true); } FileUtilities.sortFiles(filePaths, sortMode); // refresh view if (viewMode == GRID_VIEW) { gv.setAdapter(new GridItemAdapter(getApplicationContext(), currentDirectory, filePaths)); } else { lv.setAdapter(new ListItemAdapter(getApplicationContext(), filePaths)); } // close drawer if it was open drawerLayout.closeDrawer(drawerList); } @Override public void onBackPressed() { if (drawerLayout.isDrawerOpen(drawerList)) { drawerLayout.closeDrawer(drawerList); } else if (!currentDirectory.equals(homeDirectory)) { // navigate upwards in directory hierarchy openParentDirectory(); } else { // only exit if warning has been shown if (canQuit) { super.onBackPressed(); return; } // show warning about leaving the app and set a timer Toast.makeText(this, R.string.back_again_to_quit, Toast.LENGTH_SHORT).show(); canQuit = true; new Handler().postDelayed(new Runnable() { @Override public void run() { canQuit = false; } }, 3000); } } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.context_menu, menu); } @Override public boolean onContextItemSelected(MenuItem item) { AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo(); switch (item.getItemId()) { case R.id.context_menu_open: open(info.position); return true; case R.id.context_menu_share: share(info.position); return true; default: return super.onContextItemSelected(item); } } private void switchToDocumentProvider(IDocumentProvider provider) { new AsyncTask<IDocumentProvider, Void, Void>() { @Override protected Void doInBackground(IDocumentProvider... provider) { // switch document provider: // these operations may imply network access and must be run in // a different thread try { documentProvider = provider[0]; homeDirectory = documentProvider.getRootDirectory(); currentDirectory = homeDirectory; filePaths = currentDirectory.listFiles(FileUtilities.getFileFilter(filterMode)); } catch (final RuntimeException e) { final Activity activity = LibreOfficeUIActivity.this; activity.runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(activity, e.getMessage(), Toast.LENGTH_SHORT).show(); } }); Log.e(LOGTAG, e.getMessage(), e.getCause()); } return null; } @Override protected void onPostExecute(Void result) { refreshView(); } }.execute(provider); } public void openDirectory(IFile dir) { if (dir == null) return; new AsyncTask<IFile, Void, Void>() { @Override protected Void doInBackground(IFile... dir) { // get list of files: // this operation may imply network access and must be run in // a different thread currentDirectory = dir[0]; try { filePaths = currentDirectory.listFiles(FileUtilities.getFileFilter(filterMode)); } catch (final RuntimeException e) { final Activity activity = LibreOfficeUIActivity.this; activity.runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(activity, e.getMessage(), Toast.LENGTH_SHORT).show(); } }); Log.e(LOGTAG, e.getMessage(), e.getCause()); } return null; } @Override protected void onPostExecute(Void result) { refreshView(); } }.execute(dir); } public void open(final IFile document) { new AsyncTask<IFile, Void, File>() { @Override protected File doInBackground(IFile... document) { // this operation may imply network access and must be run in // a different thread try { return document[0].getDocument(); } catch (final RuntimeException e) { final Activity activity = LibreOfficeUIActivity.this; activity.runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(activity, e.getMessage(), Toast.LENGTH_SHORT).show(); } }); Log.e(LOGTAG, e.getMessage(), e.getCause()); return null; } } @Override protected void onPostExecute(File file) { if (file != null) { Intent i = new Intent(Intent.ACTION_VIEW, Uri.fromFile(file)); String packageName = getApplicationContext().getPackageName(); ComponentName componentName = new ComponentName(packageName, LibreOfficeMainActivity.class.getName()); i.setComponent(componentName); // these extras allow to rebuild the IFile object in LOMainActivity i.putExtra("org.libreoffice.document_provider_id", documentProvider.getId()); i.putExtra("org.libreoffice.document_uri", document.getUri()); startActivity(i); } } }.execute(document); } private void open(int position) { IFile file = filePaths.get(position); if (!file.isDirectory()) { open(file); } else { openDirectory(file); } } private void openParentDirectory() { new AsyncTask<Void, Void, IFile>() { @Override protected IFile doInBackground(Void... dir) { // this operation may imply network access and must be run in // a different thread return currentDirectory.getParent(); } @Override protected void onPostExecute(IFile result) { openDirectory(result); } }.execute(); } private void share(int position) { new AsyncTask<IFile, Void, File>() { @Override protected File doInBackground(IFile... document) { // this operation may imply network access and must be run in // a different thread try { return document[0].getDocument(); } catch (final RuntimeException e) { final Activity activity = LibreOfficeUIActivity.this; activity.runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(activity, e.getMessage(), Toast.LENGTH_SHORT).show(); } }); Log.e(LOGTAG, e.getMessage(), e.getCause()); return null; } } @Override protected void onPostExecute(File file) { if (file != null) { Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND); Uri uri = Uri.fromFile(file); sharingIntent.setType(FileUtilities.getMimeType(file.getName())); sharingIntent.putExtra(android.content.Intent.EXTRA_STREAM, uri); sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, file.getName()); startActivity(Intent.createChooser(sharingIntent, getString(R.string.share_via))); } } }.execute(filePaths.get(position)); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.view_menu, menu); MenuItem item = menu.findItem(R.id.menu_view_toggle); if (viewMode == GRID_VIEW) { item.setTitle(R.string.list_view); item.setIcon(R.drawable.light_view_as_list); } else { item.setTitle(R.string.grid_view); item.setIcon(R.drawable.light_view_as_grid); } item = menu.findItem(R.id.menu_sort_size); if (sortMode == FileUtilities.SORT_LARGEST) { item.setTitle(R.string.sort_smallest); } else { item.setTitle(R.string.sort_largest); } item = menu.findItem(R.id.menu_sort_az); if (sortMode == FileUtilities.SORT_AZ) { item.setTitle(R.string.sort_za); } else { item.setTitle(R.string.sort_az); } item = menu.findItem(R.id.menu_sort_modified); if (sortMode == FileUtilities.SORT_NEWEST) { item.setTitle(R.string.sort_oldest); } else { item.setTitle(R.string.sort_newest); } return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Will close the drawer if the home button is pressed if (drawerToggle.onOptionsItemSelected(item)) { return true; } switch (item.getItemId()) { case android.R.id.home: if (!currentDirectory.equals(homeDirectory)) { openParentDirectory(); } break; case R.id.menu_view_toggle: if (viewMode == GRID_VIEW) { viewMode = LIST_VIEW; item.setTitle(R.string.grid_view); // Button points to next view. item.setIcon(R.drawable.light_view_as_grid); } else { viewMode = GRID_VIEW; item.setTitle(R.string.list_view); // Button points to next view. item.setIcon(R.drawable.light_view_as_list); } createUI(); break; case R.id.menu_sort_size: case R.id.menu_sort_az: case R.id.menu_sort_modified: sortFiles(item); break; case R.id.action_about: mAbout.showAbout(); return true; case R.id.action_settings: startActivity(new Intent(getApplicationContext(), SettingsActivity.class)); return true; case R.id.menu_storage_preferences: startActivity(new Intent(this, DocumentProviderSettingsActivity.class)); break; default: return super.onOptionsItemSelected(item); } return true; } public void sortFiles(MenuItem item) { switch (item.getItemId()) { case R.id.menu_sort_az: if (sortMode == FileUtilities.SORT_AZ) { sortMode = FileUtilities.SORT_ZA; item.setTitle(R.string.sort_az); } else { sortMode = FileUtilities.SORT_AZ; item.setTitle(R.string.sort_za); } break; case R.id.menu_sort_modified: if (sortMode == FileUtilities.SORT_NEWEST) { sortMode = FileUtilities.SORT_OLDEST; item.setTitle(R.string.sort_newest); } else { sortMode = FileUtilities.SORT_NEWEST; item.setTitle(R.string.sort_oldest); } break; case R.id.menu_sort_size: if (sortMode == FileUtilities.SORT_LARGEST) { sortMode = FileUtilities.SORT_SMALLEST; item.setTitle(R.string.sort_largest); } else { sortMode = FileUtilities.SORT_LARGEST; item.setTitle(R.string.sort_smallest); } break; default: break; } this.onResume(); } public void readPreferences() { prefs = getSharedPreferences(EXPLORER_PREFS_KEY, MODE_PRIVATE); viewMode = prefs.getInt(EXPLORER_VIEW_TYPE_KEY, GRID_VIEW); sortMode = prefs.getInt(SORT_MODE_KEY, FileUtilities.SORT_AZ); SharedPreferences defaultPrefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext()); filterMode = Integer.valueOf(defaultPrefs.getString(FILTER_MODE_KEY, "-1")); Intent i = this.getIntent(); if (i.hasExtra(CURRENT_DIRECTORY_KEY)) { try { currentDirectory = documentProvider.createFromUri(new URI(i.getStringExtra(CURRENT_DIRECTORY_KEY))); } catch (URISyntaxException e) { currentDirectory = documentProvider.getRootDirectory(); } Log.d(LOGTAG, CURRENT_DIRECTORY_KEY); } if (i.hasExtra(FILTER_MODE_KEY)) { filterMode = i.getIntExtra(FILTER_MODE_KEY, FileUtilities.ALL); Log.d(LOGTAG, FILTER_MODE_KEY); } if (i.hasExtra(EXPLORER_VIEW_TYPE_KEY)) { viewMode = i.getIntExtra(EXPLORER_VIEW_TYPE_KEY, GRID_VIEW); Log.d(LOGTAG, EXPLORER_VIEW_TYPE_KEY); } } @Override protected void onSaveInstanceState(Bundle outState) { // TODO Auto-generated method stub super.onSaveInstanceState(outState); outState.putString(CURRENT_DIRECTORY_KEY, currentDirectory.getUri().toString()); outState.putInt(FILTER_MODE_KEY, filterMode); outState.putInt(EXPLORER_VIEW_TYPE_KEY, viewMode); outState.putInt(DOC_PROIVDER_KEY, documentProvider.getId()); Log.d(LOGTAG, currentDirectory.toString() + Integer.toString(filterMode) + Integer.toString(viewMode)); //prefs.edit().putInt(EXPLORER_VIEW_TYPE, viewType).commit(); Log.d(LOGTAG, "savedInstanceState"); } @Override protected void onRestoreInstanceState(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onRestoreInstanceState(savedInstanceState); if (savedInstanceState.isEmpty()) { return; } if (documentProvider == null) { Log.d(LOGTAG, "onRestoreInstanceState - documentProvider is null"); documentProvider = DocumentProviderFactory.getInstance() .getProvider(savedInstanceState.getInt(DOC_PROIVDER_KEY)); } try { currentDirectory = documentProvider .createFromUri(new URI(savedInstanceState.getString(CURRENT_DIRECTORY_KEY))); } catch (URISyntaxException e) { currentDirectory = documentProvider.getRootDirectory(); } filterMode = savedInstanceState.getInt(FILTER_MODE_KEY, FileUtilities.ALL); viewMode = savedInstanceState.getInt(EXPLORER_VIEW_TYPE_KEY, GRID_VIEW); //openDirectory(currentDirectory); Log.d(LOGTAG, "onRestoreInstanceState"); Log.d(LOGTAG, currentDirectory.toString() + Integer.toString(filterMode) + Integer.toString(viewMode)); } @Override protected void onPause() { //prefs.edit().putInt(EXPLORER_VIEW_TYPE, viewType).commit(); super.onPause(); Log.d(LOGTAG, "onPause"); } @Override protected void onResume() { super.onResume(); Log.d(LOGTAG, "onResume"); Log.d(LOGTAG, "sortMode=" + sortMode + " filterMode=" + filterMode); createUI(); } @Override protected void onStart() { super.onStart(); Log.d(LOGTAG, "onStart"); } @Override protected void onStop() { super.onStop(); Log.d(LOGTAG, "onStop"); } @Override protected void onDestroy() { super.onDestroy(); Log.d(LOGTAG, "onDestroy"); } public boolean onNavigationItemSelected(int itemPosition, long itemId) { filterMode = itemPosition - 1; //bit of a hack, I know. -1 is ALL 0 Docs etc openDirectory(currentDirectory);// Uses filter mode return true; } private int dpToPx(int dp) { final float scale = getApplicationContext().getResources().getDisplayMetrics().density; return (int) (dp * scale + 0.5f); } class ListItemAdapter implements ListAdapter { private Context mContext; private List<IFile> filePaths; private final long KB = 1024; private final long MB = 1048576; public ListItemAdapter(Context mContext, List<IFile> filePaths) { this.mContext = mContext; this.filePaths = filePaths; } public int getCount() { return filePaths != null ? filePaths.size() : 0; } public Object getItem(int arg0) { return null; } public long getItemId(int arg0) { return 0; } public int getItemViewType(int arg0) { return 0; } public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View listItem; if (convertView == null) { listItem = new View(mContext); listItem = inflater.inflate(R.layout.file_list_item, null); } else { listItem = convertView; } final int pos = position; listItem.setClickable(true); listItem.setOnClickListener(new OnClickListener() { public void onClick(View v) { open(pos); } }); listItem.setOnLongClickListener(new OnLongClickListener() { @Override public boolean onLongClick(View v) { // workaround to show the context menu: // prevent onClickListener from getting this event return false; } }); // set value into textview TextView filename = (TextView) listItem.findViewById(R.id.file_list_item_name); filename.setText(filePaths.get(position).getName()); //filename.setClickable(true); TextView fileSize = (TextView) listItem.findViewById(R.id.file_list_item_size); //TODO Give size in KB , MB as appropriate. String size = "0B"; long length = filePaths.get(position).getSize(); if (length < KB) { size = Long.toString(length) + "B"; } if (length >= KB && length < MB) { size = Long.toString(length / KB) + "KB"; } if (length >= MB) { size = Long.toString(length / MB) + "MB"; } fileSize.setText(size); //fileSize.setClickable(true); TextView fileDate = (TextView) listItem.findViewById(R.id.file_list_item_date); SimpleDateFormat df = new SimpleDateFormat("dd MMM yyyy hh:ss"); Date date = filePaths.get(position).getLastModified(); //TODO format date fileDate.setText(df.format(date)); // set image based on selected text ImageView imageView = (ImageView) listItem.findViewById(R.id.file_list_item_icon); switch (FileUtilities.getType(filePaths.get(position).getName())) { case FileUtilities.DOC: imageView.setImageResource(R.drawable.writer); break; case FileUtilities.CALC: imageView.setImageResource(R.drawable.calc); break; case FileUtilities.DRAWING: imageView.setImageResource(R.drawable.draw); break; case FileUtilities.IMPRESS: imageView.setImageResource(R.drawable.impress); break; default: break; } if (filePaths.get(position).isDirectory()) { //Eventually have thumbnails of each sub file on a black circle //For now just a folder icon imageView.setImageResource(R.drawable.folder); } //imageView.setClickable(true); return listItem; } public int getViewTypeCount() { return 1; } public boolean hasStableIds() { return false; } public boolean isEmpty() { return false; } public void registerDataSetObserver(DataSetObserver arg0) { } public void unregisterDataSetObserver(DataSetObserver arg0) { } public boolean areAllItemsEnabled() { return false; } public boolean isEnabled(int position) { return false; } } } /* vim:set shiftwidth=4 softtabstop=4 expandtab: */