Android example source code file (AccountAuthenticatorCache.java)

This example Android source code file (AccountAuthenticatorCache.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

accountauthenticatorcache, android, attributeset, authenticatordescription, content, io, ioexception, myserializer, registeredservicescache, string, tag, text, typedarray, utilities, utils, xmlpullparserexception, xmlserializerandparser

The AccountAuthenticatorCache.java Android example source code

/*
 * Copyright (C) 2009 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 android.accounts;

import android.content.pm.PackageManager;
import android.content.pm.RegisteredServicesCache;
import android.content.pm.XmlSerializerAndParser;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.content.Context;
import android.util.AttributeSet;
import android.text.TextUtils;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlSerializer;
import org.xmlpull.v1.XmlPullParserException;

import java.io.IOException;

/**
 * A cache of services that export the {@link IAccountAuthenticator} interface. This cache
 * is built by interrogating the {@link PackageManager} and is updated as packages are added,
 * removed and changed. The authenticators are referred to by their account type and
 * are made available via the {@link RegisteredServicesCache#getServiceInfo} method.
 * @hide
 */
/* package private */ class AccountAuthenticatorCache
        extends RegisteredServicesCache<AuthenticatorDescription> {
    private static final String TAG = "Account";
    private static final MySerializer sSerializer = new MySerializer();

    public AccountAuthenticatorCache(Context context) {
        super(context, AccountManager.ACTION_AUTHENTICATOR_INTENT,
                AccountManager.AUTHENTICATOR_META_DATA_NAME,
                AccountManager.AUTHENTICATOR_ATTRIBUTES_NAME, sSerializer);
    }

    public AuthenticatorDescription parseServiceAttributes(Resources res,
            String packageName, AttributeSet attrs) {
        TypedArray sa = res.obtainAttributes(attrs,
                com.android.internal.R.styleable.AccountAuthenticator);
        try {
            final String accountType =
                    sa.getString(com.android.internal.R.styleable.AccountAuthenticator_accountType);
            final int labelId = sa.getResourceId(
                    com.android.internal.R.styleable.AccountAuthenticator_label, 0);
            final int iconId = sa.getResourceId(
                    com.android.internal.R.styleable.AccountAuthenticator_icon, 0);
            final int smallIconId = sa.getResourceId(
                    com.android.internal.R.styleable.AccountAuthenticator_smallIcon, 0);
            final int prefId = sa.getResourceId(
                    com.android.internal.R.styleable.AccountAuthenticator_accountPreferences, 0);
            if (TextUtils.isEmpty(accountType)) {
                return null;
            }
            return new AuthenticatorDescription(accountType, packageName, labelId, iconId, 
                    smallIconId, prefId);
        } finally {
            sa.recycle();
        }
    }

    private static class MySerializer implements XmlSerializerAndParser<AuthenticatorDescription> {
        public void writeAsXml(AuthenticatorDescription item, XmlSerializer out)
                throws IOException {
            out.attribute(null, "type", item.type);
        }

        public AuthenticatorDescription createFromXml(XmlPullParser parser)
                throws IOException, XmlPullParserException {
            return AuthenticatorDescription.newKey(parser.getAttributeValue(null, "type"));
        }
    }
}