Android處理HTTP響應

Question

我剛剛開始編寫我的第一個Android應用程序，但遇到了問題。 我不知道如何正確處理HTTP響應。 我找到了創建GET請求（使用okhttp）的方法，並找到了處理Callable響應的方法。 我正在獲取對象的數組，然后需要為RecycleView創建新的適配器（具有此數組），但是我無法從主線程設置適配器。 我不知道如何從該Callable獲取數據。

提出要求

 public static void getDonerPoints() {
    try {

        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url("http://192.168.2.64:9000/donerPoint/get?count=100&orderBy=rating&orderDirection=asc")
                .build();

        client.newCall(request).enqueue(
                new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        Log.d("mLog", "request error");
                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        try {
                            final ArrayList<DonerPoint> points = new ArrayList<>();
                            if (response.code() == HttpURLConnection.HTTP_OK) {
                                JSONArray jsonArray = new JSONArray(response.body().string());
                                ObjectMapper mapper = new ObjectMapper();
                                for (int i = 0; i < jsonArray.length(); i++)
                                    points.add(mapper.readValue(jsonArray.getString(i), DonerPoint.class));

                                ListFragment.setNewContentForAdapter(points);
                                Log.d("mLog", "ok");
                            }
                        } catch (Exception exc) {
                            Log.d("mLog", exc.toString());
                        }
                    }
                });

    } catch (Exception exc) {
    }
}

設置適配器

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.list_tab, container, false);
    mRecyclerView = (RecyclerView) rootView.findViewById(R.id.rv);

    mLayoutManager = new LinearLayoutManager(getContext());
    mRecyclerView.setLayoutManager(mLayoutManager);
    return rootView;
}

public static void setNewContentForAdapter(List<DonerPoint> points){
    mAdapter=new PointAdapter(points);
    mRecyclerView.setAdapter(mAdapter);
}

和征兆

android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

也許我不需要在靜態環境中這樣做？

Answer 1

編寫如下的單個類，

MyTask類{

//創建回調接口

//編寫用於遠程操作的代碼

//遠程操作完成后，回調綁定活動

//不要忘記將您的活動與此類取消綁定，因為這將導致內存泄漏，並且當您的活動處於停止階段時，它將崩潰，因為在停止回調后您將無法更新UI，因此請刪除此調用停下來。

}

Answer 2

就像這樣，你會發現它有用

public static void getDonerPoints() {
    try {

        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url("http://192.168.2.64:9000/donerPoint/get?count=100&orderBy=rating&orderDirection=asc")
                .build();

        client.newCall(request).enqueue(
                new Callback() {
                    @Override
                    public void onFailure(Call call, IOException e) {
                        Log.d("mLog", "request error");
                    }

                    @Override
                    public void onResponse(Call call, Response response) throws IOException {
                        try {
                             new android.os.Handler(Looper.getMainLooper()).post(new Runnable() {
                             @Override
                              public void run() {
                                final ArrayList<DonerPoint> points = new ArrayList<>();
                                if (response.code() == HttpURLConnection.HTTP_OK) {
                                JSONArray jsonArray = new JSONArray(response.body().string());
                                ObjectMapper mapper = new ObjectMapper();
                                for (int i = 0; i < jsonArray.length(); i++)
                                    points.add(mapper.readValue(jsonArray.getString(i), DonerPoint.class));

                                ListFragment.setNewContentForAdapter(points);
                                Log.d("mLog", "ok");
                            }
                        }
                });
                        } catch (Exception exc) {
                            Log.d("mLog", exc.toString());
                        }
                    }
                });

    } catch (Exception exc) {
    }
}