Java tutorial
/* * Copyright (C) 2011 Whisper Systems * * This program 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 3 of the License, or * (at your option) any later version. * * This program 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. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.innoc.secureline.ui; import android.annotation.SuppressLint; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.graphics.Bitmap; import android.graphics.Typeface; import android.os.Build; import android.os.Bundle; import android.provider.ContactsContract.CommonDataKinds.Phone; import android.support.v4.app.LoaderManager; import android.support.v4.content.Loader; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.CursorAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.SectionIndexer; import android.widget.TextView; import com.actionbarsherlock.app.SherlockListFragment; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuInflater; import com.actionbarsherlock.view.MenuItem; import com.innoc.secureline.Constants; import com.innoc.secureline.R; import com.innoc.secureline.SecureLine; import com.innoc.secureline.SecureLineService; import com.innoc.secureline.contacts.ContactAccessor; import com.innoc.secureline.contacts.ContactsSectionIndexer; import com.innoc.secureline.util.BitmapUtil; import java.lang.ref.SoftReference; import java.util.HashMap; /** * Activity that displays a listview of contacts for the RedPhone "dialer." * Both for straight contacts and "frequently contacted" tabs. * * @author Moxie Marlinspike * */ public class ContactsListActivity extends SherlockListFragment implements LoaderManager.LoaderCallbacks<Cursor> { private HashMap<Long, SoftReference<Bitmap>> photoCache = new HashMap<Long, SoftReference<Bitmap>>(); private boolean showSectionHeaders = true; private String queryFilter = ""; @Override public boolean onOptionsItemSelected(MenuItem item) { super.onOptionsItemSelected(item); switch (item.getItemId()) { case R.id.searchItem: this.getSherlockActivity().getSupportActionBar().setIcon(R.drawable.ic_tab_contacts); return true; } return false; } @Override public void onActivityCreated(Bundle icicle) { super.onActivityCreated(icicle); displayContacts(); if (!isFavoritesFragment() && Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { setHasOptionsMenu(true); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.contacts_list_content, container, false); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.contact_list_options_menu, menu); initializeSearch((android.widget.SearchView) menu.findItem(R.id.searchItem).getActionView()); } @SuppressLint("NewApi") private void initializeSearch(android.widget.SearchView searchView) { searchView.setOnQueryTextListener(new android.widget.SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String query) { ContactsListActivity.this.queryFilter = query; ContactsListActivity.this.getLoaderManager().restartLoader(0, null, ContactsListActivity.this); return true; } @Override public boolean onQueryTextChange(String newText) { return onQueryTextSubmit(newText); } }); } @Override public void onListItemClick(ListView l, View v, int position, long id) { ContactItemView contactItemView = (ContactItemView) v; String number = contactItemView.getNumber(); Intent intent = new Intent(getActivity(), SecureLineService.class); intent.setAction(SecureLineService.ACTION_OUTGOING_CALL); intent.putExtra(Constants.REMOTE_NUMBER, number); getActivity().startService(intent); Intent activityIntent = new Intent(getActivity(), SecureLine.class); activityIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(activityIntent); getActivity().finish(); } private void displayContacts() { this.showSectionHeaders = !isFavoritesFragment(); setListAdapter(new ContactsListAdapter(getActivity(), null)); this.getLoaderManager().initLoader(0, null, this); getListView().setDivider(null); } private class ContactsListAdapter extends CursorAdapter implements SectionIndexer { private ContactsSectionIndexer indexer; private HashMap<String, Integer> groupingTable; public ContactsListAdapter(Context context, Cursor c) { super(context, c, false); this.indexer = new ContactsSectionIndexer(c, Phone.DISPLAY_NAME); this.groupingTable = new HashMap<String, Integer>(); } @Override public void changeCursor(Cursor cursor) { this.groupingTable = new HashMap<String, Integer>(); this.indexer = new ContactsSectionIndexer(cursor, Phone.DISPLAY_NAME); super.changeCursor(cursor); } // @Override // public Cursor swapCursor(Cursor cursor) { // this.groupingTable = new HashMap<String, Integer>(); // this.indexer = new ContactsSectionIndexer(cursor, Phone.DISPLAY_NAME); // return super.swapCursor(cursor); // } public int getPositionForSection(int section) { return indexer.getPositionForSection(section); } public int getSectionForPosition(int position) { return indexer.getSectionForPosition(position); } public Object[] getSections() { return indexer.getSections(); } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { ContactItemView view = new ContactItemView(context); bindView(view, context, cursor); return view; } @Override public void bindView(View view, Context context, Cursor cursor) { String contactName = cursor.getString(cursor.getColumnIndex(Phone.DISPLAY_NAME)); int personId = cursor.getInt(cursor.getColumnIndex(Phone.CONTACT_ID)); String number = cursor.getString(cursor.getColumnIndex(Phone.NUMBER)); int type = cursor.getInt(cursor.getColumnIndex(Phone.TYPE)); int rowId = cursor.getInt(cursor.getColumnIndex(Phone._ID)); int section = indexer.getSectionForPosition(cursor.getPosition()); if (showSectionHeaders && (cursor.getPosition() == indexer.getPositionForSection(section))) { ((ContactItemView) view).setSectionLabel((String) indexer.getSections()[section]); } else { ((ContactItemView) view).disableSectionLabel(); } if (!groupingTable.containsKey(contactName) || (groupingTable.containsKey(contactName) && groupingTable.get(contactName) == rowId)) { groupingTable.put(contactName, rowId); ((ContactItemView) view).set(contactName, personId, number, type); } else { ((ContactItemView) view).setGrouped(contactName, personId, number, type); } } } private class ContactItemView extends RelativeLayout { private ImageView divider; private View sectionDivider; private TextView sectionLabel; private TextView name; private TextView number; private TextView type; private ImageView avatar; public ContactItemView(Context context) { super(context.getApplicationContext()); LayoutInflater li = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); li.inflate(R.layout.contact_list_item, this, true); this.name = (TextView) findViewById(R.id.name); this.number = (TextView) findViewById(R.id.number); this.type = (TextView) findViewById(R.id.type); this.sectionLabel = (TextView) findViewById(R.id.section_label); this.divider = (ImageView) findViewById(R.id.divider); this.sectionDivider = findViewById(R.id.section_divider); this.avatar = (ImageView) findViewById(R.id.contact_photo_image); } public void setSectionLabel(String label) { this.sectionLabel.setText(label); this.sectionLabel.setTypeface(sectionLabel.getTypeface(), Typeface.BOLD); this.sectionLabel.setVisibility(View.VISIBLE); this.divider.setVisibility(View.GONE); this.sectionDivider.setVisibility(View.VISIBLE); } public void disableSectionLabel() { this.sectionLabel.setVisibility(View.GONE); this.divider.setVisibility(View.VISIBLE); this.sectionDivider.setVisibility(View.GONE); } public void set(String name, int personId, String number, int type) { this.avatar.setImageBitmap(loadContactPhoto(personId)); this.name.setText(name); this.number.setText(number); this.type.setText(Phone.getTypeLabel(ContactsListActivity.this.getResources(), type, "").toString() .toUpperCase()); this.avatar.setVisibility(View.VISIBLE); this.name.setVisibility(View.VISIBLE); this.divider.setVisibility(View.VISIBLE); } public void setGrouped(String name, int personId, String number, int type) { set(name, personId, number, type); this.name.setVisibility(View.INVISIBLE); this.divider.setVisibility(View.GONE); this.avatar.setVisibility(View.INVISIBLE); } public String getNumber() { return this.number.getText().toString(); } private Bitmap getCachedBitmapIfAvailable(long id) { SoftReference<Bitmap> bitmapReference = photoCache.get(id); if (bitmapReference != null) { Bitmap cachedBitmap = bitmapReference.get(); if (cachedBitmap != null) { return cachedBitmap; } else { photoCache.remove(id); } } return null; } private Bitmap constructNewBitmap(long id) { Bitmap newBitmap = ContactAccessor.getInstance().getPhoto(ContactsListActivity.this.getActivity(), id); Bitmap croppedBitmap = BitmapUtil.getCircleCroppedBitmap(newBitmap); SoftReference<Bitmap> newSR = new SoftReference<Bitmap>(croppedBitmap); photoCache.put(id, newSR); return croppedBitmap; } private Bitmap loadContactPhoto(long id) { Bitmap contactBitmap = getCachedBitmapIfAvailable(id); if (contactBitmap != null) return contactBitmap; else return constructNewBitmap(id); } } private boolean isFavoritesFragment() { return getArguments() != null && getArguments().getBoolean("favorites", false); } @Override public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) { ((TextView) getListView().getEmptyView()).setText(R.string.ContactsListActivity_loading); if (isFavoritesFragment()) { if (this.queryFilter == null || this.queryFilter.trim().length() == 0) { return ContactAccessor.getInstance().getRegisteredFavoritesCursor(getActivity()); } else { return ContactAccessor.getInstance().getRegisteredFavoritesCursor(getActivity(), queryFilter); } } else { if (this.queryFilter == null || this.queryFilter.trim().length() == 0) { return ContactAccessor.getInstance().getRegisteredContactsCursor(getActivity()); } else { return ContactAccessor.getInstance().getRegisteredContactsCursor(getActivity(), queryFilter); } } } @Override public void onLoadFinished(Loader<Cursor> arg0, Cursor cursor) { ((TextView) getListView().getEmptyView()).setText(R.string.ContactsListActivity_no_contacts_found); ((CursorAdapter) getListAdapter()).changeCursor(cursor); } @Override public void onLoaderReset(Loader<Cursor> arg0) { ((CursorAdapter) getListAdapter()).changeCursor(null); } }