在Android片段中使用Proteus，但在抛出膨胀器- Proteus Android布局引擎时出现了错误。

Question

请检查我的代码：

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    JSONObject jsonlayout = null ;
    try {
        jsonlayout = new JSONObject(loadJSONFromAsset(getContext()));
    } catch (JSONException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    ProteusLayoutInflater layoutInflater = (ProteusLayoutInflater)inflater;
    ProteusView view = layoutInflater.inflate(jsonlayout.toString(), null, container, 0);
    return view.getAsView();
}

我希望使用Proteus库来创建视图并将其呈现为片段。

你能告诉我我做错了什么吗？通过这段代码，我得到了以下错误：

不能将com.android.internal.policy.PhoneLayoutInflater转换为com.flipkart.android.proteus.ProteusLayoutInflater

Answer 1

下面是Fragment的一些示例代码，您应该可以开始使用这些代码：

记住将gson-adapter添加到应用程序的build.gradle文件中。

dependencies {
    compile 'com.github.flipkart-incubator.proteus:gson-adapter:5.0.0-rc12'
}

在您的片段中，根据以下内容添加和修改：

  // some private fields in the fragment
  private Proteus proteus;
  private ProteusContext context;
  private ProteusLayoutInflater layoutInflater;
  private Gson gson;

  public void onAttach (Activity activity) {
    // create a new instance of the proteus type adapter 
    // for gson and register it with gson. 
    ProteusTypeAdapterFactory adapter = new ProteusTypeAdapterFactory(activity);
    gson = new GsonBuilder().registerTypeAdapterFactory(adapter).create();

    // create a new instance of proteus from the builder
    proteus = new ProteusBuilder().build();
    // get a new context object from proteus
    context = proteus.createContextBuilder(activity).build();

    // this context object has the proteus layout inflater
    layoutInflater = context.getInflater();

    // set the instance of proteus 
    ProteusTypeAdapterFactory.PROTEUS_INSTANCE_HOLDER.setProteus(proteus);
  }

  public ProteusContext getContext() {
    return context;
  }

  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    String layoutString = loadJSONFromAsset(getContext());

    // use gson to deserialize the string into a Layout object.
    Layout layout = gson.fromJson(layoutString, Layout.class);

    // the use the proteus layout inflater to inflate a new proteus view  
    ProteusView view = layoutInflater.inflate(layout, new ObjectValue());
    return view.getAsView();
  }

这基本上是一个工作的例子，有很大的空间，以加强和改进。您应该直接到git，克隆它，玩演示应用程序，并查看ProteusActivity的代码作为参考实现。