提高Android应用进程存活率的方法是什么

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接上文

• 创建Account服务

public class XXAuthService extends Service {     private XXAuthenticator mAuthenticator;       @Override     public void onCreate() {         mAuthenticator = new XXAuthenticator(this);     }       private XXAuthenticator getAuthenticator() {         if (mAuthenticator == null)             mAuthenticator = new XXAuthenticator(this);         return mAuthenticator;     }       @Override     public IBinder onBind(Intent intent) {         return getAuthenticator().getIBinder();     }       class XXAuthenticator extends AbstractAccountAuthenticator {         private final Context context;         private AccountManager accountManager;         public XXAuthenticator(Context context) {             super(context);             this.context = context;             accountManager = AccountManager.get(context);         }           @Override         public Bundle addAccount(AccountAuthenticatorResponse response, String accountType, String authTokenType, String[] requiredFeatures, Bundle options)                 throws NetworkErrorException { // 添加账号 示例代码             final Bundle bundle = new Bundle();             final Intent intent = new Intent(context, AuthActivity.class);             intent.putExtra(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);             bundle.putParcelable(AccountManager.KEY_INTENT, intent);             return bundle;         }           @Override         public Bundle getAuthToken(AccountAuthenticatorResponse response, Account account, String authTokenType, Bundle options)                 throws NetworkErrorException { // 认证 示例代码             String authToken = accountManager.peekAuthToken(account, getString(R.string.account_token_type));             //if not, might be expired, register again             if (TextUtils.isEmpty(authToken)) {                 final String password = accountManager.getPassword(account);                 if (password != null) {                     //get new token authToken = account.name + password;                 }             }             //without password, need to sign again             final Bundle bundle = new Bundle();             if (!TextUtils.isEmpty(authToken)) {                 bundle.putString(AccountManager.KEY_ACCOUNT_NAME, account.name);                 bundle.putString(AccountManager.KEY_ACCOUNT_TYPE, account.type);                 bundle.putString(AccountManager.KEY_AUTHTOKEN, authToken);                 return bundle;             }               //no account data at all, need to do a sign             final Intent intent = new Intent(context, AuthActivity.class);             intent.putExtra(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response);             intent.putExtra(AuthActivity.ARG_ACCOUNT_NAME, account.name);             bundle.putParcelable(AccountManager.KEY_INTENT, intent);             return bundle;         }           @Override         public String getAuthTokenLabel(String authTokenType) { //            throw new UnsupportedOperationException();             return null;         }           @Override         public Bundle editProperties(AccountAuthenticatorResponse response, String accountType) {             return null;         }           @Override         public Bundle confirmCredentials(AccountAuthenticatorResponse response, Account account, Bundle options)                 throws NetworkErrorException {             return null;         }           @Override         public Bundle updateCredentials(AccountAuthenticatorResponse response, Account account, String authTokenType, Bundle options)                 throws NetworkErrorException {             return null;         }           @Override         public Bundle hasFeatures(AccountAuthenticatorResponse response, Account account, String[] features)                 throws NetworkErrorException {             return null;         }     } }

• 声明Account服务

其中authenticator为：

• 使用Account服务

同SyncAdapter，通过AccountManager使用

。申请Token主要是通过 AccountManager.getAuthToken)系列方法

。添加账号则通过 AccountManager.addAccount)

。查看是否存在账号通过 AccountManager.getAccountsByType)

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