anotherim/src/main/java/eu/siacs/conversations/ui/ChooseContactActivity.java

package eu.siacs.conversations.ui;

import java.util.ArrayList;
import java.util.Collections;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import eu.siacs.conversations.R;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.ListItem;
import eu.siacs.conversations.ui.adapter.ListItemAdapter;

public class ChooseContactActivity extends XmppActivity {

	private ListView mListView;
	private ArrayList<ListItem> contacts = new ArrayList<>();
	private ArrayAdapter<ListItem> mContactsAdapter;

	private EditText mSearchEditText;

	private TextWatcher mSearchTextWatcher = new TextWatcher() {

		@Override
		public void afterTextChanged(Editable editable) {
			filterContacts(editable.toString());
		}

		@Override
		public void beforeTextChanged(CharSequence s, int start, int count,
				int after) {
		}

		@Override
		public void onTextChanged(CharSequence s, int start, int before,
				int count) {
		}
	};

	private MenuItem.OnActionExpandListener mOnActionExpandListener = new MenuItem.OnActionExpandListener() {

		@Override
		public boolean onMenuItemActionExpand(MenuItem item) {
			mSearchEditText.post(new Runnable() {

				@Override
				public void run() {
					mSearchEditText.requestFocus();
					InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
					imm.showSoftInput(mSearchEditText,
							InputMethodManager.SHOW_IMPLICIT);
				}
			});

			return true;
		}

		@Override
		public boolean onMenuItemActionCollapse(MenuItem item) {
			InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
			imm.hideSoftInputFromWindow(mSearchEditText.getWindowToken(),
					InputMethodManager.HIDE_IMPLICIT_ONLY);
			mSearchEditText.setText("");
			filterContacts(null);
			return true;
		}
	};

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_choose_contact);
		mListView = (ListView) findViewById(R.id.choose_contact_list);
		mListView.setFastScrollEnabled(true);
		mContactsAdapter = new ListItemAdapter(this, contacts);
		mListView.setAdapter(mContactsAdapter);
		mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1,
					int position, long arg3) {
				InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
				imm.hideSoftInputFromWindow(mSearchEditText.getWindowToken(),
						InputMethodManager.HIDE_IMPLICIT_ONLY);
				Intent request = getIntent();
				Intent data = new Intent();
				ListItem mListItem = contacts.get(position);
				data.putExtra("contact", mListItem.getJid().toString());
				String account = request.getStringExtra("account");
				if (account == null && mListItem instanceof Contact) {
					account = ((Contact) mListItem).getAccount().getJid().toBareJid().toString();
				}
				data.putExtra("account", account);
				data.putExtra("conversation",
						request.getStringExtra("conversation"));
				setResult(RESULT_OK, data);
				finish();
			}
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.choose_contact, menu);
		MenuItem menuSearchView = menu.findItem(R.id.action_search);
		View mSearchView = menuSearchView.getActionView();
		mSearchEditText = (EditText) mSearchView
				.findViewById(R.id.search_field);
		mSearchEditText.addTextChangedListener(mSearchTextWatcher);
		menuSearchView.setOnActionExpandListener(mOnActionExpandListener);
		return true;
	}

	@Override
	void onBackendConnected() {
		filterContacts(null);
	}

	protected void filterContacts(String needle) {
		this.contacts.clear();
		for (Account account : xmppConnectionService.getAccounts()) {
			if (account.getStatus() != Account.STATUS_DISABLED) {
				for (Contact contact : account.getRoster().getContacts()) {
					if (contact.showInRoster() && contact.match(needle)) {
						this.contacts.add(contact);
					}
				}
			}
		}
		Collections.sort(this.contacts);
		mContactsAdapter.notifyDataSetChanged();
	}

}