Java tutorial
/* * Copyright (C) 2007-2008 Esmertec AG. Copyright (C) 2007-2008 The Android Open * Source Project * * 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.awesomeapp.messenger.ui; import android.app.SearchManager; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.database.DatabaseUtils; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.LoaderManager; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.view.MenuItemCompat; import android.support.v4.widget.ResourceCursorAdapter; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.SearchView; import android.util.SparseBooleanArray; import android.view.ActionMode; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.Button; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import org.awesomeapp.messenger.ImApp; import org.awesomeapp.messenger.Preferences; import org.awesomeapp.messenger.provider.Imps; import java.util.ArrayList; import java.util.HashMap; import java.util.Set; import im.zom.messenger.R; /** Activity used to pick a contact. */ public class ContactsPickerActivity extends BaseActivity { public final static String EXTRA_EXCLUDED_CONTACTS = "excludes"; public final static String EXTRA_RESULT_USERNAME = "result"; public final static String EXTRA_RESULT_USERNAMES = "results"; public final static String EXTRA_RESULT_PROVIDER = "provider"; public final static String EXTRA_RESULT_ACCOUNT = "account"; public final static String EXTRA_RESULT_MESSAGE = "message"; private int REQUEST_CODE_ADD_CONTACT = 9999; private ContactAdapter mAdapter; private MyLoaderCallbacks mLoaderCallbacks; private ContactListListener mListener = null; private Uri mUri = Imps.Contacts.CONTENT_URI; private Handler mHandler = new Handler(); private String mExcludeClause; Uri mData; private String mSearchString; SearchView mSearchView = null; ListView mListView = null; // The loader's unique id. Loader ids are specific to the Activity or // Fragment in which they reside. private static final int LOADER_ID = 1; // The callbacks through which we will interact with the LoaderManager. private LoaderManager.LoaderCallbacks<Cursor> mCallbacks; private boolean mIsCABDestroyed = true; private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() { @Override public boolean onCreateActionMode(ActionMode actionMode, Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.menu_contact_picker_multi, menu); return false; } @Override public boolean onPrepareActionMode(ActionMode actionMode, Menu menu) { return false; } @Override public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) { if (menuItem.getItemId() == R.id.action_start_chat) { SparseBooleanArray checkedPos = mListView.getCheckedItemPositions(); multiFinish(checkedPos); return true; } return false; } @Override public void onDestroyActionMode(ActionMode actionMode) { mAdapter.clearSelection(); mIsCABDestroyed = true; } }; @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); ((ImApp) getApplication()).setAppTheme(this); setContentView(R.layout.contacts_picker_activity); if (getIntent().getData() != null) mUri = getIntent().getData(); mListView = (ListView) findViewById(R.id.contactsList); mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE); mListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) { multiStart(i); //getSupportActionBar().startActionMode(mActionModeCallback); return true; } }); mListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() { private int nr = 0; @Override public boolean onCreateActionMode(android.view.ActionMode mode, Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.menu_contact_picker_multi, menu); return true; } @Override public boolean onPrepareActionMode(android.view.ActionMode mode, Menu menu) { return false; } @Override public boolean onActionItemClicked(android.view.ActionMode mode, MenuItem item) { if (item.getItemId() == R.id.action_start_chat) { SparseBooleanArray checkedPos = mListView.getCheckedItemPositions(); multiFinish(checkedPos); return true; } return false; } @Override public void onDestroyActionMode(android.view.ActionMode mode) { nr = 0; mAdapter.clearSelection(); mIsCABDestroyed = true; } @Override public void onItemCheckedStateChanged(android.view.ActionMode mode, int position, long id, boolean checked) { mAdapter.setNewSelection(position, checked); if (!checked) mAdapter.removeSelection(position); } }); mListView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { if (mIsCABDestroyed) { mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE); //do your action command here } if (mListView.getChoiceMode() == ListView.CHOICE_MODE_MULTIPLE_MODAL) { //mAdapter.getItem(position); boolean newChecked = !mListView.isItemChecked(position); mListView.setItemChecked(position, newChecked); mAdapter.setNewSelection(position, newChecked); if (!newChecked) mAdapter.removeSelection(position); } else { Cursor cursor = (Cursor) mAdapter.getItem(position); Intent data = new Intent(); data.putExtra(EXTRA_RESULT_USERNAME, cursor.getString(ContactListItem.COLUMN_CONTACT_USERNAME)); data.putExtra(EXTRA_RESULT_PROVIDER, cursor.getLong(ContactListItem.COLUMN_CONTACT_PROVIDER)); data.putExtra(EXTRA_RESULT_ACCOUNT, cursor.getLong(ContactListItem.COLUMN_CONTACT_ACCOUNT)); setResult(RESULT_OK, data); finish(); } } }); doFilterAsync(""); } private void multiStart(int i) { mListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL); mListView.startActionMode(mActionModeCallback); if (i != -1) mAdapter.setNewSelection(i, true); mIsCABDestroyed = false; // mark readiness to switch back to SINGLE CHOICE after the CABis destroyed } private void multiFinish(SparseBooleanArray positions) { ArrayList<String> users = new ArrayList<String>(); ArrayList<Integer> providers = new ArrayList<Integer>(); ArrayList<Integer> accounts = new ArrayList<Integer>(); for (int i = 0; i < positions.size(); i++) { if (positions.valueAt(i)) { Cursor cursor = (Cursor) mAdapter.getItem(i); users.add(cursor.getString(ContactListItem.COLUMN_CONTACT_USERNAME)); providers.add((int) cursor.getLong(ContactListItem.COLUMN_CONTACT_PROVIDER)); accounts.add((int) cursor.getLong(ContactListItem.COLUMN_CONTACT_ACCOUNT)); } } Intent data = new Intent(); data.putStringArrayListExtra(EXTRA_RESULT_USERNAMES, users); data.putIntegerArrayListExtra(EXTRA_RESULT_PROVIDER, providers); data.putIntegerArrayListExtra(EXTRA_RESULT_ACCOUNT, accounts); setResult(RESULT_OK, data); finish(); } @Override protected void onActivityResult(int request, int response, Intent data) { super.onActivityResult(request, response, data); if (response == RESULT_OK) if (request == REQUEST_CODE_ADD_CONTACT) { String newContact = data.getExtras().getString(ContactsPickerActivity.EXTRA_RESULT_USERNAME); if (newContact != null) { Intent dataNew = new Intent(); long providerId = data.getExtras().getLong(ContactsPickerActivity.EXTRA_RESULT_PROVIDER); dataNew.putExtra(EXTRA_RESULT_USERNAME, newContact); dataNew.putExtra(EXTRA_RESULT_PROVIDER, providerId); setResult(RESULT_OK, dataNew); finish(); } } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.contact_list_menu, menu); SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); mSearchView = (SearchView) MenuItemCompat.getActionView(menu.findItem(R.id.menu_search)); if (mSearchView != null) { mSearchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName())); mSearchView.setIconifiedByDefault(false); SearchView.OnQueryTextListener queryTextListener = new SearchView.OnQueryTextListener() { public boolean onQueryTextChange(String newText) { mSearchString = newText; doFilterAsync(mSearchString); return true; } public boolean onQueryTextSubmit(String query) { mSearchString = query; doFilterAsync(mSearchString); return true; } }; mSearchView.setOnQueryTextListener(queryTextListener); } return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_new_group_chat: multiStart(-1); // getSupportActionBar().startActionMode(mActionModeCallback); return true; } return super.onOptionsItemSelected(item); } public void doFilterAsync(final String query) { doFilter(query); } boolean mAwaitingUpdate = false; public synchronized void doFilter(String filterString) { mSearchString = filterString; if (mAdapter == null) { mAdapter = new ContactAdapter(ContactsPickerActivity.this, R.layout.contact_view); mListView.setAdapter(mAdapter); mLoaderCallbacks = new MyLoaderCallbacks(); getSupportLoaderManager().initLoader(LOADER_ID, null, mLoaderCallbacks); } else { if (!mAwaitingUpdate) { mAwaitingUpdate = true; mHandler.postDelayed(new Runnable() { public void run() { getSupportLoaderManager().restartLoader(LOADER_ID, null, mLoaderCallbacks); mAwaitingUpdate = false; } }, 1000); } } } private Cursor mCursor; @Override protected void onDestroy() { super.onDestroy(); if (mCursor != null && (!mCursor.isClosed())) mCursor.close(); } private class ContactAdapter extends ResourceCursorAdapter { private HashMap<Integer, Boolean> mSelection = new HashMap<Integer, Boolean>(); public ContactAdapter(Context context, int view) { super(context, view, null, 0); } @Override public boolean hasStableIds() { return true; } public void setNewSelection(int position, boolean value) { mSelection.put(position, value); notifyDataSetChanged(); } public boolean isPositionChecked(int position) { Boolean result = mSelection.get(position); return result == null ? false : result; } public Set<Integer> getCurrentCheckedPosition() { return mSelection.keySet(); } public void removeSelection(int position) { mSelection.remove(position); notifyDataSetChanged(); } public void clearSelection() { mSelection = new HashMap<Integer, Boolean>(); notifyDataSetChanged(); } @Override public View getView(int position, View convertView, ViewGroup parent) { View v = super.getView(position, convertView, parent);//let the adapter handle setting up the row views v.setBackgroundColor(getResources().getColor(android.R.color.transparent)); if (mSelection.get(position) != null) { v.setBackgroundColor(getResources().getColor(R.color.holo_blue_light)); } return super.getView(position, convertView, parent); } @Override public void bindView(View view, Context context, Cursor cursor) { ContactListItem v = (ContactListItem) view; ContactViewHolder holder = (ContactViewHolder) view.getTag(); if (holder == null) { holder = new ContactViewHolder(v); holder.mLine1 = (TextView) view.findViewById(R.id.line1); holder.mLine2 = (TextView) view.findViewById(R.id.line2); holder.mAvatar = (ImageView) view.findViewById(R.id.avatar); holder.mSubBox = view.findViewById(R.id.subscriptionBox); holder.mButtonSubApprove = (Button) view.findViewById(R.id.btnApproveSubscription); holder.mButtonSubDecline = (Button) view.findViewById(R.id.btnDeclineSubscription); //holder.mStatusIcon = (ImageView)view.findViewById(R.id.statusIcon); //holder.mStatusText = (TextView)view.findViewById(R.id.statusText); //holder.mEncryptionIcon = (ImageView)view.findViewById(R.id.encryptionIcon); holder.mContainer = view.findViewById(R.id.message_container); // holder.mMediaThumb = (ImageView)findViewById(R.id.media_thumbnail); view.setTag(holder); } v.bind(holder, cursor, mSearchString, false); } } class MyLoaderCallbacks implements LoaderCallbacks<Cursor> { @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { StringBuilder buf = new StringBuilder(); if (mSearchString != null) { buf.append('('); buf.append(Imps.Contacts.NICKNAME); buf.append(" LIKE "); DatabaseUtils.appendValueToSql(buf, "%" + mSearchString + "%"); buf.append(" OR "); buf.append(Imps.Contacts.USERNAME); buf.append(" LIKE "); DatabaseUtils.appendValueToSql(buf, "%" + mSearchString + "%"); buf.append(')'); buf.append(" AND "); } buf.append(Imps.Contacts.TYPE).append('=').append(Imps.Contacts.TYPE_NORMAL); CursorLoader loader = new CursorLoader(ContactsPickerActivity.this, mUri, ContactListItem.CONTACT_PROJECTION, buf == null ? null : buf.toString(), null, Imps.Contacts.MODE_AND_ALPHA_SORT_ORDER); // loader.setUpdateThrottle(50L); return loader; } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor newCursor) { mAdapter.swapCursor(newCursor); } @Override public void onLoaderReset(Loader<Cursor> loader) { mAdapter.swapCursor(null); } } public interface ContactListListener { public void openChat(Cursor c); public void showProfile(Cursor c); } }