tablayout和viewpager结合使用的示例以及如何取消viewpager的预加载(当页面可见时才加载数据),使用了Rxandroid来代替AsyncTask
###ScreenShot：
###Viewpager如何取消预加载
主要是重写Fragment的setUserVisibleHint(boolean isVisibleToUser)，根据是否对用户可见来进行操作MainCode
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (getUserVisibleHint()){
isVisible=true;
onVisible();
}else {
isVisible=false;
onInvisible();
}
}
另外还需要对viewpager进行限制：
viewpager.setOffscreenPageLimit(1);
###使用RxAndroid替代AsyncTask
private Observable showLoadingUI() {
return Observable.create(new Observable.OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> subscriber) {
try {
showLoadingView();
Thread.sleep(2500);
subscriber.onNext( ""+mCurIndex);
subscriber.onCompleted();
// or do network
} catch (InterruptedException e) {
subscriber.onError(e);
}
}
}).subscribeOn(Schedulers.newThread());
}
showLoadingUI().compose(bindToLifecycle())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Subscriber<String >() {
@Override
public void onCompleted() {
mLoadingView.dismiss();
mHasLoadedOnce = true;
}
@Override
public void onError(Throwable e) {
mFragmentView.setText("Fragment # 加载失败...");
}
@Override
public void onNext(String s) {
mFragmentView.setText("Fragment #" + s);
}
});参考资料：使用RxJava.Observable取代AsyncTask和AsyncTaskLoader
###Thanks to ：
CatLoadingView (https://github.com/Rogero0o/CatLoadingView) 效果很漂亮
Rxandroid
RxLifeCycle