Question

在我的应用程序中，我想从服务器向Spinner显示一些数据对于Spinner我使用这个库：https://github.com/ganfra/MaterialSpinner
我的Json：

2017-05-14

要连接到服务器，我使用"stars": [ { "id": 105076, "name": "Eleanor Tomlinson", "character": null, "imageUrl": "http://example.com/cpanel/uploads/Celebrities/105076/thumb2-SK4MPEGW09.jpg", "userReview": "" }, { "id": 10127, "name": "Aidan Turner", "character": null, "imageUrl": "http://example.com/cpanel/uploads/Celebrities/10127/thumb2-KL9G4TNGW2.jpg", "userReview": "" }, { "id": 21340, "name": "Gabriella Wilde", "character": null, "imageUrl": "http://example.com/cpanel/uploads/Celebrities/21340/thumb2-UD5HJ2EICN.jpg", "userReview": "" } ]库并在代码下面写

Retrofit

但我不知道如何将星级类中的名称添加到ArrayAdapter中以便在Spinner中设置。

final SerialDetailSendData sendData = new SerialDetailSendData();
sendData.setSeriesID(serialID);

InterfaceApi api = ApiClient.getClient().create(InterfaceApi.class);
Call<SeriesDetailResponse> call = api.getSeriesDetail(sendData);

call.enqueue(new Callback<SeriesDetailResponse>() {
    @Override
    public void onResponse(Call<SeriesDetailResponse> call, Response<SeriesDetailResponse> response) {
        if (response.body().getData() != null) {
            ArrayAdapter<String> adapter = new ArrayAdapter<String>(context, R.layout.spinner_hint_item,
                    ???);
            adapter.setDropDownViewResource(R.layout.spinner_dropdown_item);
            SerialReview_CastSpinner.setAdapter(adapter);

            SerialReview_CastProgress.hide();
        }
    }

    @Override
    public void onFailure(Call<SeriesDetailResponse> call, Throwable t) {
    }
});

Answer 1

首先从api创建ArrayList检索数据。

ArrayList<String> arrayList = new ArrayList<String>();

arrayList.add("Item1");
arrayList.add("Item2");
arrayList.add("Item3");

并创建ArrayAdapter数据。

ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String> (this,android.R.layout.simple_spinner_dropdown_item, arrayList);
spinner.setAdapter(arrayAdapter);

Answer 2

您应该只在回调中添加适配器，而不是创建一个，因为它在对象创建方面效率较低。

final ArrayAdapter<String> adapter = new ArrayAdapter<String>(context, android.R.layout.simple_spinner_dropdown_item);
adapter.setDropDownViewResource(R.layout.spinner_dropdown_item);
spinner.setAdapter(adapter);

call.enqueue(new Callback<SeriesDetailResponse>() {
    @Override
    public void onResponse(Call<SeriesDetailResponse> call, Response<SeriesDetailResponse> response) {
        SeriesDetailResponse body = response.body();
        List<Star> stars = body.getStars();

        adapter.clear();
        for (Star star : stars) {
            adapter.add(star.toString());
        }

        progress.hide();
    }

如果您有List<String> ArrayAdapter<String>或使用ArrayAdapter<Star>，则可以使用adapter.addAll()缩短该循环

Answer 3

试试这段代码：

ClassCastException

如何在android中将数据添加到Spinner中

3 个答案: