Question

我只是创建一个简单/空白片段，它应该使用Mosby框架。每次我使用getView()方法时，我都会收到错误：

java.lang.ClassCastException： de.xxx.projectZ.packA.AFragment无法强制转换为 de.xxx.projectZ.packA.AView

public interface AView extends MvpLceView<List<Persons>> {
  // empty
}

导致错误的演示者

public class APresenter extends MvpBasePresenter<AView> {
    PersonsRepository personsRepository;

    @Inject
    public APresenter(PersonsRepositoryImpl personsRepository) {
        this.personsRepository = personsRepository;
    }

    public void loadPersons() {
// ERROR
        if (isViewAttached())
            getView().showLoading(true);

        List<Person> persons = personsRepository.getPersons();


        if (isViewAttached()) {

        }
    }
}

我的片段标题

public class PersonsFragment
        extends MvpLceFragment<SwipeRefreshLayout, List<Person>, AView, APresenter> {

有人知道为什么会这样吗？

Answer 1

你的片段没有实现public class PersonsFragment extends MvpLceFragment<SwipeRefreshLayout, List<Person>, AView, APresenter> implements AView // This is missing { ... } ...

<svg>
<path id="MyPath" d="M 100 200
          C 200 100 300   0 400 100
          C 500 200 600 300 700 200
          C 800 100 900 100 900 100"/>

<use id="curve" xlink:href="#MyPath" fill="none" stroke="red"  />

<text id="origText" fill="white">
    <textpath xlink:href="#MyPath" >
  OH NOES!, DANCING TEXT ARRIVED!

        <animate attributeName="startOffset" from="100%" to ="-100%" 
             begin="0s" dur="10s" repeatCount="indefinite" keyTimes="0;1" 
             calcMode="spline" keySplines="0 0 1 1"/>
    </textpath>
</text>
</svg>

var t = document.getElementById('origText');
var t_text = t.textContent; // "We go up...."
var curve = document.getElementById("MyPath");
var len = curve.getTotalLength(); // curve length

var steps = len/t_text.length; // get width of step
var start_pt = 0; // start at beginning
var prev_pt = curve.getPointAtLength(0); // measure first step


t.textContent = ""; // clear up original text;

for (var i = 0; i < t_text.length; ++i) { // char loop
    var new_pt = curve.getPointAtLength(start_pt); // measure pt
    var ts = genTspan(t_text[i], prev_pt, new_pt); // tspan
    t.appendChild(ts); // add to <text>

    start_pt += steps; // go to next step (point)
    prev_pt = new_pt; // remember previous point
    }

function genTspan(myChar,prev_pt,new_pt) {
    var tspan = document.createElementNS("http://www.w3.org/2000/svg", "tspan");
    tspan.setAttributeNS(null, 'dy', new_pt.y - prev_pt.y); 
    tspan.textContent = myChar;
 return tspan;
 }

Mosby框架 - getView导致ClassCastException

1 个答案: