Question

如果saveChanges函数给我真正的价值，我想运行changesHasBeenSaved。改造完成后，如何获取布尔值或字符串或整数（任意值）？有可能吗？

我需要一个类似的功能：

public boolean saveChanges()
{
    Boolean output = false;
    RequestAPI requestAPI = Requests.getRetrofit();
    Call<Object> jsonObjectCall = requestAPI.readAllCategoeies();

    jsonObjectCall.enqueue(new Callback<Object>() {
        @Override
        public void onResponse(Call<Object> call, Response<Object> response) {
            if(response.body() != null) {
                output = true;
            }

        }

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

    return output;
}

Answer 1

您应将方法返回类型boolean更改为void，以进行异步改造。

您应该传递侦听器/回调以获取回调状态。

首先创建如下所示的回调接口

public interface ApiCallback {
   void onResponse(boolean success);
}

saveChanges如下所示

public void saveChanges(final ApiCallback callback)
{
    RequestAPI requestAPI = Requests.getRetrofit();
    Call<Object> jsonObjectCall = requestAPI.readAllCategoeies();
    jsonObjectCall.enqueue(new Callback<Object>() {
        @Override
        public void onResponse(Call<Object> call, Response<Object> response) {
            callback.onResponse(response.body() != null);
        }

        @Override
        public void onFailure(Call<Object> call, Throwable t) {
            call.cancel();
            callback.onResponse(false);
        }
    });
}

然后您需要调用如下的saveChanges方法

saveChanges(new ApiCallback () {
   public void onResponse(boolean success){
        if(success){
          // do something
        } else{
          // do something
        }
   }
});

Answer 2

jsonObjectCall.enqueue(new Callback<Object>() {
    @Override
    public void onResponse(Call<Object> call, Response<Object> response) {
       //when the response is successful

        if(response.isSuccessful()) {
            output = true;

            // display response as string 
            Log.i(TAG, "post submitted to API." + response.body().toString());

            //Object user1 = response.body(); maps response to the modal class


        }

    }

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

您回叫到上面的更改，包括注释以明确使用。

希望这会有所帮助。

改造返回布尔值

2 个答案: