RxPresenter.java

/**
 * Copyright 2016 JustWayward Team
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.justwayward.reader.base;

import rx.Subscription;
import rx.subscriptions.CompositeSubscription;

/**
 * Created by lfh on 2016/9/11.
 * 基于Rx的Presenter封装,控制订阅的生命周期
 * unsubscribe() 这个方法很重要，
 * 因为在 subscribe() 之后， Observable 会持有 Subscriber 的引用，
 * 这个引用如果不能及时被释放，将有内存泄露的风险。
 */
public class RxPresenter<T extends BaseContract.BaseView> implements BaseContract.BasePresenter<T> {

    protected T mView;
    protected CompositeSubscription mCompositeSubscription;

    protected void unSubscribe() {
        if (mCompositeSubscription != null) {
            mCompositeSubscription.unsubscribe();
        }
    }

    protected void addSubscrebe(Subscription subscription) {
        if (mCompositeSubscription == null) {
            mCompositeSubscription = new CompositeSubscription();
        }
        mCompositeSubscription.add(subscription);
    }

    @Override
    public void attachView(T view) {
        this.mView = view;
    }

    @Override
    public void detachView() {
        this.mView = null;
        unSubscribe();
    }
}