项目地址
https://github.com/codeestX/GeekNews
值得借鉴的地方
- 项目结构(MVP+Dagger2)
- Retrofit对多个baseUrl的管理
- realm的使用
- 侧边栏导航、tab导航的使用
- 单Activity+多Fragment的管理(基于me.yokeyword:fragmentation)
- 页面跳转共享资源的使用(列表->详情共享新闻图片)
- ==搜索框的使用,搜索时间的发布订阅处理逻辑==
- Logger的使用,见LogUtil
- 在Application中调用InitializeService,初始化了Logger,Bugly(错误收集+统计),LeakCanary(内存泄漏检测),BlockCanary(UI阻塞监控),tbs webview(腾讯webview服务)
解读
- RxBus事件总线
DailyPresenter的构造方法中有一个registerEvent方法
@Inject
public DailyPresenter(RetrofitHelper mRetrofitHelper,RealmHelper mRealHelper) {
this.mRetrofitHelper = mRetrofitHelper;
this.mRealmHelper = mRealHelper;
registerEvent();
}
registerEvent()是订阅RxBus事件的
private void registerEvent() {
Subscription rxSubscription = RxBus.getDefault().toObservable(CalendarDay.class)
.subscribeOn(Schedulers.io())
.map(new Func1<CalendarDay, String>() {
...
在DailyFragment中,发布RxBus事件
swipeRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
if(currentDate.equals(DateUtil.getTomorrowDate())) {
mPresenter.getDailyData();
} else {
int year = Integer.valueOf(currentDate.substring(0,4));
int month = Integer.valueOf(currentDate.substring(4,6));
int day = Integer.valueOf(currentDate.substring(6,8));
CalendarDay date = CalendarDay.from(year, month - 1, day);
RxBus.getDefault().post(date);
}
}
});
- DailyAdapter
有三种样式:图片滚动栏(类似于web的banner)、日期、新闻item
@Override
public int getItemViewType(int position) {
if(!isBefore) {
if(position == 0) {
return ITEM_TYPE.ITEM_TOP.ordinal();
} else if(position == 1) {
return ITEM_TYPE.ITEM_DATE.ordinal();
} else {
return ITEM_TYPE.ITEM_CONTENT.ordinal();
}
} else {
if(position == 0) {
return ITEM_TYPE.ITEM_DATE.ordinal();
} else {
return ITEM_TYPE.ITEM_CONTENT.ordinal();
}
}
}
其中positi==0的就是图片滚动栏,由一个ViewPager实现,该ViewPager的Adapter是由另外一个Adapter持有的
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if(viewType == ITEM_TYPE.ITEM_TOP.ordinal()) {
mAdapter = new TopPagerAdapter(mContext,mTopList);
return new TopViewHolder(inflater.inflate(R.layout.item_top, parent, false));
} else if(viewType == ITEM_TYPE.ITEM_DATE.ordinal()) {
return new DateViewHolder(inflater.inflate(R.layout.item_date, parent, false));
}
return new ContentViewHolder(inflater.inflate(R.layout.item_daily, parent, false));
}
- compose的使用
可以少写切换线程的代码
@Override
public void getDailyData() {
Subscription rxSubscription = mRetrofitHelper.fetchDailyListInfo()
.compose(RxUtil.<DailyListBean>rxSchedulerHelper())
...
}
其中的compose主要是在io线程处理数据,ui线程处理结果
/**
* 统一线程处理
* @param <T>
* @return
*/
public static <T> Observable.Transformer<T, T> rxSchedulerHelper() { //compose简化线程
return new Observable.Transformer<T, T>() {
@Override
public Observable<T> call(Observable<T> observable) {
return observable.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread());
}
};
}
- 新闻的item点击进入detail时会共享新闻图片
xml如下
<com.codeest.geeknews.widget.SquareImageView
android:id="@+id/iv_daily_item_image"
android:transitionName="shareView"
android:src="@mipmap/ic_launcher"
android:layout_width="@dimen/list_image_size"
android:layout_height="@dimen/list_image_size" />
...
java如下
mAdapter.setOnItemClickListener(new DailyAdapter.OnItemClickListener() {
@Override
public void onItemClick(int position,View shareView) {
mPresenter.insertReadToDB(mList.get(position).getId());
mAdapter.setReadState(position,true);
if(mAdapter.getIsBefore()) {
mAdapter.notifyItemChanged(position + 1);
} else {
mAdapter.notifyItemChanged(position + 2);
}
Intent intent = new Intent();
intent.setClass(mContext, ZhihuDetailActivity.class);
intent.putExtra("id",mList.get(position).getId());
ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(mActivity, shareView, "shareView");
mContext.startActivity(intent,options.toBundle());
}
});
detail中做如下处理
xml如下
<android.support.design.widget.AppBarLayout
android:id="@+id/app_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:transitionName="shareView"
android:fitsSystemWindows="true">
...
java如下
(getWindow().getSharedElementEnterTransition()).addListener(new Transition.TransitionListener() {
@Override
public void onTransitionStart(Transition transition) {
}
@Override
public void onTransitionEnd(Transition transition) {
/**
* 测试发现部分手机(如红米note2)上加载图片会变形,没有达到centerCrop效果
* 查阅资料发现Glide配合SharedElementTransition是有坑的,需要在Transition动画结束后再加载图片
* https://github.com/TWiStErRob/glide-support/blob/master/src/glide3/java/com/bumptech/glide/supportapp/github/_847_shared_transition/DetailFragment.java
*/
isTransitionEnd = true;
if (imgUrl != null) {
isImageShow = true;
ImageLoader.load(mContext, imgUrl, detailBarImage);
}
}
@Override
public void onTransitionCancel(Transition transition) {
}
@Override
public void onTransitionPause(Transition transition) {
}
@Override
public void onTransitionResume(Transition transition) {
}
});
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