android - 如何等待 Okhttp 调用的结果以在测试中使用它？

Question

我创建了一个方法来检查我的应用程序是否能够使用 OkHttp 连接到我的服务器。

这是我的测试类:

public class NetworkTest {

static boolean resultWeb = false;

public static boolean pingTestWeb() {

    OkHttpClient client = new OkHttpClient();

    Request request = new Request.Builder()
            .url("http://www.google.com")//My server address will go here
            .build();

    client.newCall(request).enqueue(new Callback() {

        @Override
        public void onFailure(Request request, IOException e) {
            resultWeb = false;
            Log.i("Error","Failed to connect: "+e.getMessage());
        }

        @Override
        public void onResponse(Response response) throws IOException {

            Log.i("Success","Success: "+response.code());
            if (response.code() == 200) {
                resulWeb = true;
            }
        }
    });

    return resultWeb;
}

这里是我对 OnCreate() 上的 Activity 进行测试的地方:

if (NetworkTest.pingTestWeb()) {

        // Do something if true...

    } else {

        // Do something if false, like showing an AlertDialog...
    }

问题是，我的 pingTestWeb 的默认超时时间为 10000 毫秒，如何让 Activity 仅在 pingTestWeb 为 false 时才创建 AlertDialog？因为它没有等待响应。

Answer 1

您还可以使用 CountDownLatch，这样您就可以在测试中放入异步:

public class NetworkTest {

static boolean resultWeb = false;

public static boolean pingTestWeb() {

    OkHttpClient client = new OkHttpClient();

    Request request = new Request.Builder()
            .url("http://www.google.com")//My server address will go here
            .build();

    CountDownLatch countDownLatch = new CountDownLatch(1);
    client.newCall(request).enqueue(new Callback() {

        @Override
        public void onFailure(Request request, IOException e) {
            resultWeb = false;
            Log.i("Error","Failed to connect: "+e.getMessage());
            countDownLatch.countDown();
        }

        @Override
        public void onResponse(Response response) throws IOException {

            Log.i("Success","Success: "+response.code());
            if (response.code() == 200) {
                resulWeb = true;
            }
            countDownLatch.countDown();
        }
    });

    countDownLatch.await();
    return resultWeb;
}