Java tutorial
/* * Copyright (C) 2008 OpenIntents.org * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.openintents.filemanager; import java.io.File; import org.openintents.filemanager.bookmarks.BookmarkListActivity; import org.openintents.filemanager.compatibility.HomeIconHelper; import org.openintents.filemanager.files.FileHolder; import org.openintents.filemanager.lists.SimpleFileListFragment; import org.openintents.filemanager.util.FileUtils; import org.openintents.filemanager.util.UIUtils; import org.openintents.intents.FileManagerIntents; import org.openintents.util.MenuIntentOptionsWithIcons; import android.content.ComponentName; import android.content.Intent; import android.os.Build; import android.os.Build.VERSION; import android.os.Build.VERSION_CODES; import android.os.Bundle; import android.os.Environment; import android.support.v4.app.FragmentActivity; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; public class FileManagerActivity extends FragmentActivity { private static final String FRAGMENT_TAG = "ListFragment"; protected static final int REQUEST_CODE_BOOKMARKS = 1; private SimpleFileListFragment mFragment; @Override protected void onNewIntent(Intent intent) { if (intent.getData() != null) mFragment.openInformingPathBar(new FileHolder(FileUtils.getFile(intent.getData()), this)); } /** * Either open the file and finish, or navigate to the designated directory. This gives FileManagerActivity the flexibility to actually handle file scheme data of any type. * @return The folder to navigate to, if applicable. Null otherwise. */ private File resolveIntentData() { File data = FileUtils.getFile(getIntent().getData()); if (data == null) return null; if (data.isFile()) { FileUtils.openFile(new FileHolder(data, this), this); finish(); return null; } else return FileUtils.getFile(getIntent().getData()); } /** Called when the activity is first created. */ @Override public void onCreate(Bundle icicle) { UIUtils.setThemeFor(this); super.onCreate(icicle); // Enable home button. if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) HomeIconHelper.activity_actionbar_setHomeButtonEnabled(this); // Search when the user types. setDefaultKeyMode(DEFAULT_KEYS_SEARCH_LOCAL); // If not called by name, open on the requested location. File data = resolveIntentData(); // Add fragment only if it hasn't already been added. mFragment = (SimpleFileListFragment) getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG); if (mFragment == null) { mFragment = new SimpleFileListFragment(); Bundle args = new Bundle(); if (data == null) args.putString(FileManagerIntents.EXTRA_DIR_PATH, Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED) ? Environment.getExternalStorageDirectory().getAbsolutePath() : "/"); else args.putString(FileManagerIntents.EXTRA_DIR_PATH, data.toString()); mFragment.setArguments(args); getSupportFragmentManager().beginTransaction().add(android.R.id.content, mFragment, FRAGMENT_TAG) .commit(); } else { // If we didn't rotate and data wasn't null. if (icicle == null && data != null) mFragment.openInformingPathBar(new FileHolder(new File(data.toString()), this)); } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = new MenuInflater(this); inflater.inflate(R.menu.main, menu); return true; } @Override public boolean onPrepareOptionsMenu(Menu menu) { // Generate any additional actions that can be performed on the // overall list. This allows other applications to extend // our menu with their own actions. Intent intent = new Intent(null, getIntent().getData()); intent.addCategory(Intent.CATEGORY_ALTERNATIVE); // menu.addIntentOptions(Menu.CATEGORY_ALTERNATIVE, 0, 0, // new ComponentName(this, NoteEditor.class), null, intent, 0, null); // Workaround to add icons: MenuIntentOptionsWithIcons menu2 = new MenuIntentOptionsWithIcons(this, menu); menu2.addIntentOptions(Menu.CATEGORY_ALTERNATIVE, 0, 0, new ComponentName(this, FileManagerActivity.class), null, intent, 0, null); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_search: onSearchRequested(); return true; case R.id.menu_settings: Intent intent = new Intent(this, PreferenceActivity.class); startActivity(intent); return true; case R.id.menu_bookmarks: startActivityForResult(new Intent(FileManagerActivity.this, BookmarkListActivity.class), REQUEST_CODE_BOOKMARKS); return true; case android.R.id.home: mFragment.browseToHome(); return true; } return super.onOptionsItemSelected(item); } // The following methods should properly handle back button presses on every API Level. @Override public boolean onKeyUp(int keyCode, KeyEvent event) { if (VERSION.SDK_INT > VERSION_CODES.DONUT) { if (keyCode == KeyEvent.KEYCODE_BACK && mFragment.pressBack()) return true; } return super.onKeyUp(keyCode, event); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (VERSION.SDK_INT <= VERSION_CODES.DONUT) { if (keyCode == KeyEvent.KEYCODE_BACK && mFragment.pressBack()) return true; } return super.onKeyDown(keyCode, event); } /** * This is called after the file manager finished. */ @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case REQUEST_CODE_BOOKMARKS: if (resultCode == RESULT_OK && data != null) { mFragment.openInformingPathBar( new FileHolder(new File(data.getStringExtra(BookmarkListActivity.KEY_RESULT_PATH)), this)); } break; default: super.onActivityResult(requestCode, resultCode, data); } } /** * We override this, so that we get informed about the opening of the search dialog and start scanning silently. */ @Override public boolean onSearchRequested() { Bundle appData = new Bundle(); appData.putString(FileManagerIntents.EXTRA_SEARCH_INIT_PATH, mFragment.getPath()); startSearch(null, false, appData, false); return true; } }