Java tutorial
/* * ServeStream: A HTTP stream browser/player for Android * Copyright 2013 William Seemann * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this.getActivity() 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 net.sourceforge.servestream.fragment; import java.util.ArrayList; import java.util.List; import net.sourceforge.servestream.transport.AbsTransport; import net.sourceforge.servestream.transport.TransportFactory; import net.sourceforge.servestream.utils.LoadingDialog; import net.sourceforge.servestream.utils.LoadingDialog.LoadingDialogListener; import net.sourceforge.servestream.utils.MusicUtils; import net.sourceforge.servestream.utils.OverflowClickListener; import net.sourceforge.servestream.utils.RateDialog; import net.sourceforge.servestream.utils.UriBeanLoader; import net.sourceforge.servestream.R; import net.sourceforge.servestream.activity.AddUrlActivity; import net.sourceforge.servestream.activity.BluetoothOptionsActivity; import net.sourceforge.servestream.activity.UriEditorActivity; import net.sourceforge.servestream.adapter.UrlListAdapter; import net.sourceforge.servestream.alarm.Alarm; import net.sourceforge.servestream.bean.UriBean; import net.sourceforge.servestream.database.StreamDatabase; import net.sourceforge.servestream.dslv.DragSortController; import net.sourceforge.servestream.dslv.DragSortListView; import net.sourceforge.servestream.preference.PreferenceConstants; import android.annotation.SuppressLint; import android.app.Activity; import android.app.AlertDialog; import android.bluetooth.BluetoothAdapter; import android.content.BroadcastReceiver; import android.content.ContentResolver; import android.content.ContentValues; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences.Editor; import android.content.SharedPreferences; import android.database.sqlite.SQLiteDatabase; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.preference.PreferenceManager; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.support.v4.app.ListFragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.Loader; import android.support.v7.view.ActionMode; import android.support.v7.widget.PopupMenu; import android.util.SparseBooleanArray; 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.widget.AdapterView; import android.widget.ListView; import android.widget.Toast; import net.sourceforge.servestream.utils.DetermineActionTask; import android.support.v7.app.ActionBarActivity; public class UrlListFragment extends ListFragment implements DetermineActionTask.MusicRetrieverPreparedListener, LoadingDialogListener, OverflowClickListener, LoaderManager.LoaderCallbacks<List<UriBean>> { public final static String TAG = UrlListFragment.class.getName(); public static final String UPDATE_LIST = "net.sourceforge.servestream.updatelist"; private final static String LOADING_DIALOG = "loading_dialog"; private final static String RATE_DIALOG = "rate_dialog"; public static final String ARG_TARGET_URI = "target_uri"; private StreamDatabase mStreamdb = null; private SharedPreferences mPreferences = null; private DetermineActionTask mDetermineActionTask; private UrlListAdapter mAdapter; private BrowseIntentListener mListener; private UriBean mSelectedMenuItem; private int mId = 0; private ActionMode mActionMode; private SparseBooleanArray mChecked; @SuppressLint("HandlerLeak") private Handler mQueueHandler = new Handler() { @Override public void handleMessage(Message msg) { MusicUtils.addToCurrentPlaylist(UrlListFragment.this.getActivity(), (long[]) msg.obj); } }; @Override public void onAttach(Activity activity) { super.onAttach(activity); try { mListener = (BrowseIntentListener) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement BrowseIntentListener"); } // connect with streams database and populate list mStreamdb = new StreamDatabase(getActivity()); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setRetainInstance(true); setHasOptionsMenu(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_uri_list, container, false); ListView list = (ListView) view.findViewById(android.R.id.list); list.setEmptyView(view.findViewById(android.R.id.empty)); return view; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); mPreferences = PreferenceManager.getDefaultSharedPreferences(getActivity()); DragSortListView list = (DragSortListView) getListView(); list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); list.setDropListener(dropListener); list.setOnItemClickListener(new AdapterView.OnItemClickListener() { public synchronized void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (mActionMode == null) { UriBean uriBean = (UriBean) parent.getItemAtPosition(position); processUri(uriBean.getUri().toString()); } else { for (int i = 0; i < mChecked.size(); i++) { if (mChecked.keyAt(i) == position && mChecked.valueAt(i)) { view.setBackgroundResource(0); getListView().setItemChecked(position, false); mAdapter.notifyDataSetChanged(); } } // Notice how the ListView api is lame // You can use mListView.getCheckedItemIds() if the adapter // has stable ids, e.g you're using a CursorAdaptor SparseBooleanArray checked = getListView().getCheckedItemPositions(); boolean hasCheckedElement = false; checked = getListView().getCheckedItemPositions(); for (int i = 0; i < checked.size(); i++) { if (checked.valueAt(i)) { View v = getListView().getChildAt(checked.keyAt(i)); if (v != null) { v.setBackgroundColor(getActivity().getResources() .getColor(R.color.selection_background_color_light)); } } } mAdapter.notifyDataSetChanged(); for (int i = 0; i < checked.size() && !hasCheckedElement; i++) { hasCheckedElement = checked.valueAt(i); } if (hasCheckedElement) { if (mActionMode == null) { mActionMode = ((ActionBarActivity) getActivity()) .startSupportActionMode(mActionModeCallback); } } else { if (mActionMode != null) { mActionMode.finish(); mActionMode = null; } } mChecked = getListView().getCheckedItemPositions().clone(); } } }); list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { if (mActionMode == null) { mActionMode = ((ActionBarActivity) getActivity()).startSupportActionMode(mActionModeCallback); getListView().setItemChecked(position, true); view.setBackgroundColor( getActivity().getResources().getColor(R.color.selection_background_color_light)); mChecked = getListView().getCheckedItemPositions().clone(); return true; } return false; } }); DragSortController controller = new DragSortController(list); controller.setDragInitMode(DragSortController.ON_DRAG); controller.setDragHandleId(R.id.drag_handle); list.setOnTouchListener(controller); mAdapter = new UrlListAdapter(getActivity(), new ArrayList<UriBean>(), this); setListAdapter(mAdapter); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); if (getArguments().getString(ARG_TARGET_URI) != null) { String targetUri = getArguments().getString(ARG_TARGET_URI); processUri(targetUri); getArguments().putString("target_uri", null); } else { // see if the user wants to rate the application after 5 uses int rateApplicationFlag = mPreferences.getInt(PreferenceConstants.RATE_APPLICATION_FLAG, 0); if (rateApplicationFlag != -1) { rateApplicationFlag++; Editor ed = mPreferences.edit(); ed.putInt(PreferenceConstants.RATE_APPLICATION_FLAG, rateApplicationFlag); ed.commit(); if (rateApplicationFlag == 10) { showDialog(RATE_DIALOG); } } } } @Override public void onStart() { super.onStart(); IntentFilter f = new IntentFilter(); f.addAction(UPDATE_LIST); getActivity().registerReceiver(mUpdateListListener, f); } @Override public void onResume() { super.onResume(); updateList(); } @Override public void onStop() { super.onStop(); getActivity().unregisterReceiver(mUpdateListListener); } @Override public void onDetach() { super.onDetach(); mStreamdb.close(); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.url_list, menu); super.onCreateOptionsMenu(menu, inflater); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case (R.id.menu_item_add): startActivity(new Intent(getActivity(), AddUrlActivity.class)); return true; default: return super.onOptionsItemSelected(item); } } private boolean processUri(String input) { Uri uri = TransportFactory.getUri(input); if (uri == null) { return false; } UriBean uriBean = TransportFactory.findUri(mStreamdb, uri); if (uriBean == null) { uriBean = TransportFactory.getTransport(uri.getScheme()).createUri(uri); AbsTransport transport = TransportFactory.getTransport(uriBean.getProtocol()); transport.setUri(uriBean); if (mPreferences.getBoolean(PreferenceConstants.AUTOSAVE, true)) { mStreamdb.saveUri(uriBean); updateList(); } } showDialog(LOADING_DIALOG); mDetermineActionTask = new DetermineActionTask(getActivity(), uriBean, this); mDetermineActionTask.execute(); return true; } public void updateList() { getLoaderManager().initLoader(mId++, null, this); } private void showUrlNotOpenedToast() { Toast.makeText(this.getActivity(), R.string.url_not_opened_message, Toast.LENGTH_SHORT).show(); } @Override public void onMusicRetrieverPrepared(String action, UriBean uri, long[] list) { dismissDialog(LOADING_DIALOG); if (action.equals(DetermineActionTask.URL_ACTION_UNDETERMINED)) { showUrlNotOpenedToast(); } else if (action.equals(DetermineActionTask.URL_ACTION_BROWSE)) { if (mPreferences.getBoolean(PreferenceConstants.AUTOSAVE, true)) { mStreamdb.touchUri(uri); } mListener.browseToUri(uri.getScrubbedUri()); } else if (action.equals(DetermineActionTask.URL_ACTION_PLAY)) { if (mPreferences.getBoolean(PreferenceConstants.AUTOSAVE, true)) { mStreamdb.touchUri(uri); } MusicUtils.playAll(getActivity(), list, 0); } } private void showDialog(String tag) { // DialogFragment.show() will take care of adding the fragment // in a transaction. We also want to remove any currently showing // dialog, so make our own transaction and take care of that here. FragmentTransaction ft = getChildFragmentManager().beginTransaction(); Fragment prev = getChildFragmentManager().findFragmentByTag(tag); if (prev != null) { ft.remove(prev); } DialogFragment newFragment = null; // Create and show the dialog. if (tag.equals(LOADING_DIALOG)) { newFragment = LoadingDialog.newInstance(this, getString(R.string.opening_url_message)); } else if (tag.equals(RATE_DIALOG)) { newFragment = RateDialog.newInstance(); } ft.add(0, newFragment, tag); ft.commitAllowingStateLoss(); } private void dismissDialog(String tag) { FragmentTransaction ft = getChildFragmentManager().beginTransaction(); DialogFragment prev = (DialogFragment) getChildFragmentManager().findFragmentByTag(tag); if (prev != null) { prev.dismiss(); ft.remove(prev); } ft.commitAllowingStateLoss(); } @Override public void onLoadingDialogCancelled(DialogFragment dialog) { if (mDetermineActionTask != null) { mDetermineActionTask.cancel(true); mDetermineActionTask = null; } } private BroadcastReceiver mUpdateListListener = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { updateList(); } }; // Container Activity must implement this interface public interface BrowseIntentListener { public void browseToUri(Uri uri); } private void showPopup(View v, UriBean uri) { mSelectedMenuItem = uri; PopupMenu popup = new PopupMenu(getActivity(), v); Menu menu = popup.getMenu(); MenuInflater inflater = popup.getMenuInflater(); inflater.inflate(R.menu.uri_list_uri_actions, menu); BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (bluetoothAdapter == null) { menu.removeItem(R.id.menu_autostart_on_bluetooth); } popup.setOnMenuItemClickListener(mPopupMenuOnMenuItemClickListener); popup.show(); } private PopupMenu.OnMenuItemClickListener mPopupMenuOnMenuItemClickListener = new PopupMenu.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { Intent intent; switch (item.getItemId()) { case R.id.menu_item_edit: intent = new Intent(getActivity(), UriEditorActivity.class); intent.putExtra(Intent.EXTRA_TITLE, mSelectedMenuItem.getId()); getActivity().startActivity(intent); return true; case R.id.menu_item_delete: // prompt user to make sure they really want this.getActivity() new AlertDialog.Builder(getActivity()) .setMessage( getString(R.string.url_delete_confirmation_msg, mSelectedMenuItem.getNickname())) .setPositiveButton(R.string.confirm_label, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { mStreamdb.deleteUri(mSelectedMenuItem); ContentResolver resolver = getActivity().getContentResolver(); resolver.update(Alarm.Columns.CONTENT_URI, null, null, new String[] { String.valueOf(mSelectedMenuItem.getId()) }); updateList(); } }).setNegativeButton(R.string.cancel_label, null).create().show(); return true; case R.id.menu_item_add_to_playlist_label: MusicUtils.addToCurrentPlaylistFromURL(getActivity(), mSelectedMenuItem, mQueueHandler); return true; case R.id.menu_item_share: String url = mSelectedMenuItem.getUri().toString(); String appName = getString(R.string.app_name); intent = new Intent(Intent.ACTION_SEND); intent.setType("text/plain"); intent.putExtra(Intent.EXTRA_TEXT, getString(R.string.share_signature, url, appName)); startActivity(Intent.createChooser(intent, getString(R.string.share_label))); return true; case R.id.menu_autostart_on_bluetooth: SharedPreferences prefs = getActivity().getSharedPreferences(BluetoothOptionsActivity.PREFS_NAME, Context.MODE_PRIVATE); Editor editor = prefs.edit(); editor.putString(BluetoothOptionsActivity.PREF_AUTOSTART_STREAM, mSelectedMenuItem.getUri().toString()); editor.commit(); return true; default: return false; } } }; @Override public void onClick(View view, UriBean uri) { showPopup(view, uri); } @Override public Loader<List<UriBean>> onCreateLoader(int id, Bundle args) { // This is called when a new Loader needs to be created. This // sample only has one Loader with no arguments, so it is simple. return new UriBeanLoader(getActivity()); } @Override public void onLoadFinished(Loader<List<UriBean>> loader, List<UriBean> data) { // Set the new data in the adapter. mAdapter.clear(); for (int i = 0; i < data.size(); i++) { mAdapter.add(data.get(i)); } } @Override public void onLoaderReset(Loader<List<UriBean>> loader) { // Clear the data in the adapter. mAdapter.clear(); } private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() { // Called when the action mode is created; startActionMode() was called @Override public boolean onCreateActionMode(ActionMode mode, Menu menu) { // Inflate a menu resource providing context menu items MenuInflater inflater = mode.getMenuInflater(); inflater.inflate(R.menu.main_activity_action_mode_menu, menu); return true; } // Called each time the action mode is shown. Always called after onCreateActionMode, but // may be called multiple times if the mode is invalidated. @Override public boolean onPrepareActionMode(ActionMode mode, Menu menu) { return false; // Return false if nothing is done } // Called when the user selects a contextual menu item @Override public boolean onActionItemClicked(ActionMode mode, MenuItem item) { switch (item.getItemId()) { case R.id.menu_item_delete: SparseBooleanArray checked = getListView().getCheckedItemPositions(); List<UriBean> selectedItems = new ArrayList<UriBean>(); for (int i = 0; i < checked.size(); i++) { // Item position in adapter int position = checked.keyAt(i); // Add sport if it is checked i.e.) == TRUE! if (checked.valueAt(i)) { selectedItems.add(mAdapter.getItem(position)); } } for (int i = 0; i < selectedItems.size(); i++) { mStreamdb.deleteUri(selectedItems.get(i)); } mode.finish(); // Action picked, so close the CAB updateList(); return true; default: return false; } } // Called when the user exits the action mode @Override public void onDestroyActionMode(ActionMode mode) { mActionMode = null; for (int i = 0; i < getListView().getCount(); i++) { View view = getListView().getChildAt(i); if (view != null) { view.setBackgroundResource(0); getListView().setItemChecked(i, false); } } mAdapter.notifyDataSetChanged(); } }; private DragSortListView.DropListener dropListener = new DragSortListView.DropListener() { @Override public void drop(int from, int to) { int listPosition = 1; UriBean item = mAdapter.getItem(from); mAdapter.remove(item); mAdapter.insert(item, to); List<UriBean> uris = new ArrayList<UriBean>(mAdapter.getCount()); for (int i = 0; i < mAdapter.getCount(); i++) { uris.add(mAdapter.getItem(i)); } StreamDatabase database = new StreamDatabase(getActivity()); SQLiteDatabase db = database.getWritableDatabase(); ContentValues values = new ContentValues(); for (int i = 0; i < uris.size(); i++) { values.clear(); values.put(StreamDatabase.FIELD_STREAM_LIST_POSITION, listPosition); listPosition++; mStreamdb.updateUri(uris.get(i), values); } db.close(); database.close(); updateList(); } }; }