android 开发常见问题

1. 使用 okhttp 中 response 对象, 其中 response.body().string() 方法只能调用一次 不然就报错

1
FATAL EXCEPTION: OkHttp Dispatcher

“

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public class HttpUtils {
    private static final MediaType JSON = MediaType.parse("application/json; charset=utf-8");
    private static OkHttpClient client = new OkHttpClient();

    public interface HttpCallbackListener {
        void onFinish(String response);
        void onError(Exception e);
    }

    public static void get(String url, HttpCallbackListener listener) {
        Request request = new Request.Builder()
                .url(url)
                .build();
        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                listener.onError(e);
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                listener.onFinish(response.body().string());
            }
        });
    }

    public static void post(String url, String json, HttpCallbackListener listener) {
        RequestBody body = RequestBody.create(JSON, json);
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .build();
        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                listener.onError(e);
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                listener.onFinish(response.body().string());
            }
        });
    }
}
```"