k-9/src/com/fsck/k9/activity/ChooseIdentity.java

package com.fsck.k9.activity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import com.fsck.k9.Account;
import com.fsck.k9.Identity;
import com.fsck.k9.Preferences;
import com.fsck.k9.R;
import java.util.List;

public class ChooseIdentity extends K9ListActivity {
    Account mAccount;
    ArrayAdapter<String> adapter;

    public static final String EXTRA_ACCOUNT = "com.fsck.k9.ChooseIdentity_account";
    public static final String EXTRA_IDENTITY = "com.fsck.k9.ChooseIdentity_identity";

    protected List<Identity> identities = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);

        getListView().setTextFilterEnabled(true);
        getListView().setItemsCanFocus(false);
        getListView().setChoiceMode(ListView.CHOICE_MODE_NONE);
        Intent intent = getIntent();
        String accountUuid = intent.getStringExtra(EXTRA_ACCOUNT);
        mAccount = Preferences.getPreferences(this).getAccount(accountUuid);

        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);

        setListAdapter(adapter);
        setupClickListeners();
    }


    @Override
    public void onResume() {
        super.onResume();
        refreshView();
    }


    protected void refreshView() {
        adapter.setNotifyOnChange(false);
        adapter.clear();

        identities = mAccount.getIdentities();
        for (Identity identity : identities) {
            String description = identity.getDescription();
            if (description == null || description.trim().length() == 0) {
                description = getString(R.string.message_view_from_format, identity.getName(), identity.getEmail());
            }
            adapter.add(description);
        }

        adapter.notifyDataSetChanged();
    }

    protected void setupClickListeners() {
        this.getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Identity identity = mAccount.getIdentity(position);
                String email = identity.getEmail();
                if (email != null && !email.trim().equals("")) {
                    Intent intent = new Intent();

                    intent.putExtra(EXTRA_IDENTITY, mAccount.getIdentity(position));
                    setResult(RESULT_OK, intent);
                    finish();
                } else {
                    Toast.makeText(ChooseIdentity.this, getString(R.string.identity_has_no_email),
                                   Toast.LENGTH_LONG).show();
                }
            }
        });

    }
}