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The source code is released under:
Apache License
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/* Copyright 2014 Braden Farmer *//from w w w.j av a 2 s . c o m * 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 com.farmerbb.notepad; import android.app.Activity; import android.app.DialogFragment; import android.app.Fragment; import android.app.FragmentTransaction; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.os.Bundle; import android.view.KeyEvent; 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.TextView; import android.widget.Toast; import java.io.File; import java.io.IOException; public class NoteViewFragment extends Fragment { private TextView noteContents; String filename = ""; String contentsOnLoad = ""; int firstLoad; // Receiver used to close fragment when a note is deleted public class DeleteNotesReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { String[] filesToDelete = intent.getStringArrayExtra("files"); for(Object file : filesToDelete) { if(filename.equals(file)) { // Add NoteListFragment or WelcomeFragment Fragment fragment; if(getActivity().findViewById(R.id.layoutMain).getTag().equals("main-layout-normal")) fragment = new NoteListFragment(); else fragment = new WelcomeFragment(); getFragmentManager() .beginTransaction() .replace(R.id.noteViewEdit, fragment, "NoteListFragment") .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE) .commit(); } } } } IntentFilter filter = new IntentFilter("com.farmerbb.notepad.DELETE_NOTES"); DeleteNotesReceiver receiver = new DeleteNotesReceiver(); /* The activity that creates an instance of this fragment must * implement this interface in order to receive event call backs. */ public interface Listener { public void showDeleteDialog(); public String loadNote(String filename) throws IOException; } // Use this instance of the interface to deliver action events Listener listener; // Override the Fragment.onAttach() method to instantiate the Listener @Override public void onAttach(Activity activity) { super.onAttach(activity); // Verify that the host activity implements the callback interface try { // Instantiate the Listener so we can send events to the host listener = (Listener) activity; } catch (ClassCastException e) { // The activity doesn't implement the interface, throw exception throw new ClassCastException(activity.toString() + " must implement Listener"); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_note_view, container, false); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // Set values setRetainInstance(true); setHasOptionsMenu(true); // Change window title getActivity().setTitle(getResources().getString(R.string.view_note)); // Show the Up button in the action bar. getActivity().getActionBar().setDisplayHomeAsUpEnabled(true); // Set up content view noteContents = (TextView) getActivity().findViewById(R.id.textView); // Get filename of saved note filename = getArguments().getString("filename"); // Load note contents try { contentsOnLoad = listener.loadNote(filename); } catch (IOException e) { showToast(R.string.error_loading_note); // Add NoteListFragment or WelcomeFragment Fragment fragment; if(getActivity().findViewById(R.id.layoutMain).getTag().equals("main-layout-normal")) fragment = new NoteListFragment(); else fragment = new WelcomeFragment(); getFragmentManager() .beginTransaction() .replace(R.id.noteViewEdit, fragment, "NoteListFragment") .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE) .commit(); } // Set TextView contents noteContents.setText(contentsOnLoad); // Show a toast message if this is the user's first time viewing a note SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE); firstLoad = sharedPref.getInt("first-load", 0); if(firstLoad == 0) { // Show dialog with info DialogFragment firstLoad = new FirstViewDialogFragment(); firstLoad.show(getFragmentManager(), "firstloadfragment"); // Set first-load preference to 1; we don't need to show the dialog anymore SharedPreferences.Editor editor = sharedPref.edit(); editor.putInt("first-load", 1); editor.apply(); } // Make TextView edit note onClick for convenience noteContents.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Bundle bundle = new Bundle(); bundle.putString("filename", filename); Fragment fragment = new NoteEditFragment(); fragment.setArguments(bundle); getFragmentManager() .beginTransaction() .replace(R.id.noteViewEdit, fragment, "NoteEditFragment") .commit(); } }); } // Register and unregister DeleteNotesReceiver @Override public void onStart() { super.onStart(); getActivity().registerReceiver(receiver, filter); } @Override public void onStop() { super.onStop(); getActivity().unregisterReceiver(receiver); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.note_view, menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: // Override default Android "up" behavior to instead mimic the back button getActivity().onBackPressed(); return true; // Edit button case R.id.action_edit: Bundle bundle = new Bundle(); bundle.putString("filename", filename); Fragment fragment = new NoteEditFragment(); fragment.setArguments(bundle); getFragmentManager() .beginTransaction() .replace(R.id.noteViewEdit, fragment, "NoteEditFragment") .commit(); return true; // Delete button case R.id.action_delete: listener.showDeleteDialog(); return true; // Share menu item case R.id.action_share: // Set current note contents to a String String contents = noteContents.getText().toString(); // Send a share intent Intent intent = new Intent(); intent.setAction(Intent.ACTION_SEND); intent.putExtra(Intent.EXTRA_TEXT, contents); intent.setType("text/plain"); // Verify that the intent will resolve to an activity, and send if(intent.resolveActivity(getActivity().getPackageManager()) != null) startActivity(Intent.createChooser(intent, getResources().getText(R.string.send_to))); return true; default: return super.onOptionsItemSelected(item); } } private void deleteNote(String filename) { // Build the pathname to delete file, then perform delete operation File fileToDelete = new File(getActivity().getFilesDir() + File.separator + filename); fileToDelete.delete(); } private void showToast(int message) { Toast toast = Toast.makeText(getActivity(), getResources().getString(message), Toast.LENGTH_SHORT); toast.show(); } public void onDeleteDialogPositiveClick() { // User touched the dialog's positive button deleteNote(filename); showToast(R.string.note_deleted); if(getActivity().findViewById(R.id.layoutMain).getTag().equals("main-layout-large")) { // Send broadcast to NoteListFragment to refresh list of notes Intent listNotesIntent = new Intent(); listNotesIntent.setAction("com.farmerbb.notepad.LIST_NOTES"); getActivity().sendBroadcast(listNotesIntent); } // Add NoteListFragment or WelcomeFragment Fragment fragment; if(getActivity().findViewById(R.id.layoutMain).getTag().equals("main-layout-normal")) fragment = new NoteListFragment(); else fragment = new WelcomeFragment(); getFragmentManager() .beginTransaction() .replace(R.id.noteViewEdit, fragment, "NoteListFragment") .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE) .commit(); } // Nested class used to listen for keyboard shortcuts public void dispatchKeyShortcutEvent(int keyCode) { switch(keyCode){ // CTRL+E: Edit case KeyEvent.KEYCODE_E: Bundle bundle = new Bundle(); bundle.putString("filename", filename); Fragment fragment = new NoteEditFragment(); fragment.setArguments(bundle); getFragmentManager() .beginTransaction() .replace(R.id.noteViewEdit, fragment, "NoteEditFragment") .commit(); break; // CTRL+D: Delete case KeyEvent.KEYCODE_D: // Show delete dialog listener.showDeleteDialog(); break; // CTRL+H: Share case KeyEvent.KEYCODE_H: // Set current note contents to a String String contents = noteContents.getText().toString(); // Send a share intent Intent shareIntent = new Intent(); shareIntent.setAction(Intent.ACTION_SEND); shareIntent.putExtra(Intent.EXTRA_TEXT, contents); shareIntent.setType("text/plain"); // Verify that the intent will resolve to an activity, and send if(shareIntent.resolveActivity(getActivity().getPackageManager()) != null) startActivity(Intent.createChooser(shareIntent, getResources().getText(R.string.send_to))); break; } } public void onBackPressed() { // Add NoteListFragment or WelcomeFragment Fragment fragment; if(getActivity().findViewById(R.id.layoutMain).getTag().equals("main-layout-normal")) fragment = new NoteListFragment(); else fragment = new WelcomeFragment(); getFragmentManager() .beginTransaction() .replace(R.id.noteViewEdit, fragment, "NoteListFragment") .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_CLOSE) .commit(); } public String getFilename() { return getArguments().getString("filename"); } }