Android开发之帐户管理

android.accounts主要包括了集中式的帐户管理API,

AccountManagerCallback,

AccountManagerFuture,

OnAccountsUpdateListener,

AbstractAccountAuthenticator,

Account,

AccountAuthenticatorActivity,

AccountAuthenticatorResponse,

AccountManager,

AuthenticatorDescription,

示例学习：添加多个帐户来集中管理

1. 在AndroidManifest.xml文件中授权，以及确定API lever为5，

<uses-sdk android:minSdkVersion=”5” />

<uses-permission android:name=”android.permission.MANAGE_ACCOUNTS”/>

<uses-permission android:name=”android.permission.ACCOUNT_MANAGER”/>

<uses-permission android:name=”android.permission.GET_ACCOUNTS”/>

<uses-permission android:name=”android.permission.AUTHENTICATE_ACCOUNTS”/>

2. 在Activity中，得到AccountManager对象

AccountManager accountManager = AccountManager.get(this);

AccountManager中的常用方法

addAccount,

addOnAccountsUpdatedListener,

removeOnAccountsUpdatedListener,

clearPassword,

getAccounts,

getAccountsByType,

getPassword,

getUserData,

setPassword,

removeAccount,

将指定类型的帐户信息全部列出来

Account[] accounts = accountManager.getAccountsByType(xxx);

for(Account account : accounts) {

  String name = account.name;

  String type = account.type;

}

如何将帐户信息添加到帐户管理器中

Activity self = this;

…

String server, username, password, type;

…

Account account = new Account(name, type);

Bundle userdata = new Bundle();

userdata.putString(“server”, server);

AccountManager am = AccountManager.get(self);

// 向帐户管理器中添加一个帐户

if(am.addAccountExplicitly(account, password, userdata)) {

  Bundle result = new Bundle();

  result.putString(AccountManager.KEY_ACCOUNT_NAME, username);

  result.putString(AccountManager.KEY_ACCOUNT_TYPE, type);

  setAccountAuthenticatorResult(result);

}

// 添加一个帐户服务(Service)和一个验证器(AbstractAccountAuthenticator)

1. 构建res/xml/authenticator.xml

<?xml version=”1.0” encoding=”utf-8”?>

<account-authenticator xmlns:android=”http://schemas.android.com/apk/res/android”

  android:accountType=”com.txrj.AccountType”

  android:icon=”@drawable/icon”

  android:smallIcon=”@drawable/icon”

  android:label=”@string/account_label”

  android:accountPreferences=”@xml/account_preferences”

/>

2. 在AndroidManifest.xml文件中开启一个帐户管理服务

<service android:name=”SleepyAccountsService”>

  <intent-filter>

    <action android:name=”android.accounts.AccountAuthenticator” />

  </intent-filter>

  <meta-data android:name=”android.accounts.AccountAuthenticator”

    android:resource=”@xml/authenticator” />

</service>

3. 实现帐户服务类SleepyAccountsService

public class SleepyAccountsService extends Service {

  private SleepyAccountAuthenticator authenticator;

  public Ibinder onBind(Intent intent) {

    if(intent.getAction().equals(android.accounts.AccountManager.ACTION_AUTHENTICATOR_INTENT)) {

      return getSleepyAuthenticator().getIBinder();

    return null;

  }

  private SleepyAccountAuthenticator getSleepyAuthenticator() {

    if(authenticator == null)

      authenticator = new SleepyAccountAuthenticator(this);

    return authenticator;

  } 

  }

}

4. 在添加、操作帐户时会通过AbstractAccountAuthenticator实现异步调用。

public Bundle addAccount(AccountAuthenticatorResponse response, String accountType,

    String authTokenType, String[] requiredFeatures, Bundle options) throws NetworkErrorException

{

    Bundle bundle = new Bundle();

    Intent intent = new Intent(context, SleepyAccountAuthenticatorActivity.class);;

    intent.putExtra(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);

    bundle.putParcelable(AccountManager.KEY_INTENT, intent);

    return bundle;

}