1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.accounts; 18 19 import android.content.pm.PackageManager; 20 import android.content.pm.RegisteredServicesCache; 21 import android.content.pm.ResolveInfo; 22 import android.content.pm.XmlSerializerAndParser; 23 import android.content.res.Resources; 24 import android.content.res.TypedArray; 25 import android.content.ComponentName; 26 import android.content.Context; 27 import android.content.Intent; 28 import android.util.AttributeSet; 29 import android.util.Log; 30 import android.text.TextUtils; 31 import org.xmlpull.v1.XmlPullParser; 32 import org.xmlpull.v1.XmlSerializer; 33 import org.xmlpull.v1.XmlPullParserException; 34 35 import java.io.IOException; 36 import java.util.List; 37 38 /** 39 * A cache of services that export the {@link IAccountAuthenticator} interface. This cache 40 * is built by interrogating the {@link PackageManager} and is updated as packages are added, 41 * removed and changed. The authenticators are referred to by their account type and 42 * are made available via the {@link RegisteredServicesCache#getServiceInfo} method. 43 * @hide 44 */ 45 /* package private */ class AccountAuthenticatorCache 46 extends RegisteredServicesCache<AuthenticatorDescription> { 47 private static final String TAG = "Account"; 48 private static final MySerializer sSerializer = new MySerializer(); 49 50 public AccountAuthenticatorCache(Context context) { 51 super(context, AccountManager.ACTION_AUTHENTICATOR_INTENT, 52 AccountManager.AUTHENTICATOR_META_DATA_NAME, 53 AccountManager.AUTHENTICATOR_ATTRIBUTES_NAME, sSerializer); 54 } 55 56 public AuthenticatorDescription parseServiceAttributes(Resources res, 57 String packageName, AttributeSet attrs) { 58 TypedArray sa = res.obtainAttributes(attrs, 59 com.android.internal.R.styleable.AccountAuthenticator); 60 try { 61 final String accountType = 62 sa.getString(com.android.internal.R.styleable.AccountAuthenticator_accountType); 63 final int labelId = sa.getResourceId( 64 com.android.internal.R.styleable.AccountAuthenticator_label, 0); 65 final int iconId = sa.getResourceId( 66 com.android.internal.R.styleable.AccountAuthenticator_icon, 0); 67 final int smallIconId = sa.getResourceId( 68 com.android.internal.R.styleable.AccountAuthenticator_smallIcon, 0); 69 final int prefId = sa.getResourceId( 70 com.android.internal.R.styleable.AccountAuthenticator_accountPreferences, 0); 71 72 boolean customTokens = false; 73 try { 74 // In HC this will be an attribute in authenticator.xml, this is a workaround 75 // using meta-data to avoid changes to the API. 76 // If meta-data is absent the old behavior is preserved. 77 // Authenticator will know if AccountManager supports customTokens or not. 78 PackageManager pm = mContext.getPackageManager(); 79 List<ResolveInfo> resolveInfos = pm.queryIntentServices( 80 new Intent(AccountManager.ACTION_AUTHENTICATOR_INTENT), 81 PackageManager.GET_META_DATA); 82 for (ResolveInfo resolveInfo: resolveInfos) { 83 android.content.pm.ServiceInfo si = resolveInfo.serviceInfo; 84 if (!packageName.equals(si.packageName)) { 85 continue; 86 } 87 Object ctString = si.metaData.get(AccountManager.ACTION_AUTHENTICATOR_INTENT 88 + ".customTokens"); 89 if (ctString != null) { 90 customTokens = true; 91 } 92 } 93 } catch (Throwable t) { 94 // Protected against invalid data in meta or unexpected 95 // conditions - the authenticator will not have the new 96 // features. 97 Log.e(TAG, "Error getting customTokens metadata " + t); 98 } 99 100 if (TextUtils.isEmpty(accountType)) { 101 return null; 102 } 103 return new AuthenticatorDescription(accountType, packageName, labelId, iconId, 104 smallIconId, prefId, customTokens); 105 } finally { 106 sa.recycle(); 107 } 108 } 109 110 private static class MySerializer implements XmlSerializerAndParser<AuthenticatorDescription> { 111 public void writeAsXml(AuthenticatorDescription item, XmlSerializer out) 112 throws IOException { 113 out.attribute(null, "type", item.type); 114 } 115 116 public AuthenticatorDescription createFromXml(XmlPullParser parser) 117 throws IOException, XmlPullParserException { 118 return AuthenticatorDescription.newKey(parser.getAttributeValue(null, "type")); 119 } 120 } 121 } 122