Java tutorial
/* * 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 com.btmura.android.reddit.accounts; import android.accounts.AccountAuthenticatorResponse; import android.accounts.AccountManager; import android.os.Bundle; import android.support.v4.app.FragmentActivity; /** * Base class for implementing an Activity that is used to help implement an * AbstractAccountAuthenticator. If the AbstractAccountAuthenticator needs to use an activity to * handle the request then it can have the activity extend AccountAuthenticatorActivity. The * AbstractAccountAuthenticator passes in the response to the intent using the following: * * <pre> * intent.putExtra({@link AccountManager#KEY_ACCOUNT_AUTHENTICATOR_RESPONSE}, response); * </pre> * * The activity then sets the result that is to be handed to the response via * {@link #setAccountAuthenticatorResult(android.os.Bundle)}. This result will be sent as the result * of the request when the activity finishes. If this is never set or if it is set to null then * error {@link AccountManager#ERROR_CODE_CANCELED} will be called on the response. * * This version is an exact copy of the framework AccountAuthenticatorActivity except that it * extends FragmentActivity so it can work with support Fragments. */ abstract class SupportAccountAuthenticatorActivity extends FragmentActivity { private AccountAuthenticatorResponse mAccountAuthenticatorResponse = null; private Bundle mResultBundle = null; /** * Set the result that is to be sent as the result of the request that caused this Activity to * be launched. If result is null or this method is never called then the request will be * canceled. * * @param result this is returned as the result of the AbstractAccountAuthenticator request */ public final void setAccountAuthenticatorResult(Bundle result) { mResultBundle = result; } /** * Retreives the AccountAuthenticatorResponse from either the intent of the icicle, if the * icicle is non-zero. * * @param icicle the save instance data of this Activity, may be null */ protected void onCreate(Bundle icicle) { super.onCreate(icicle); mAccountAuthenticatorResponse = getIntent() .getParcelableExtra(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE); if (mAccountAuthenticatorResponse != null) { mAccountAuthenticatorResponse.onRequestContinued(); } } /** * Sends the result or a Constants.ERROR_CODE_CANCELED error if a result isn't present. */ public void finish() { if (mAccountAuthenticatorResponse != null) { // send the result bundle back if set, otherwise send an error. if (mResultBundle != null) { mAccountAuthenticatorResponse.onResult(mResultBundle); } else { mAccountAuthenticatorResponse.onError(AccountManager.ERROR_CODE_CANCELED, "canceled"); } mAccountAuthenticatorResponse = null; } super.finish(); } }