Question

我收到了responseJson，而我正在尝试确定要在网格视图中加载的数据。我的屏幕上有2个textview，一旦按下1 textview，就会加载属于SubCategoryID =1的项目。按下文本视图2时，应加载属于SubCategoryID = 2的项目。

我已经给出了以下代码，

@Override
    public void onTaskCompleted(JSONArray responseJson) {

    try {
        final List<String> descriptions = new ArrayList<String>();
        final List<String> imageUrls = new ArrayList<String>();

        for (int i = 0; i < responseJson.length(); ++i) {
            final JSONObject object = responseJson.getJSONObject(i);

            mQuickReturnViewTop
            .setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {

                    try {
                        if ((object.getString("MainCategoryID"))
                                .equals("1")
                                && (object
                                        .getString("SubCategoryID"))
                                        .equals("1")) {
                            Log.i("ImageURL ",
                                    object.getString("ImageURL"));
                            imageUrls.add(object
                                    .getString("ImageURL"));
                            Log.i("Description ",
                                    object.getString("Description"));
                            descriptions.add(object
                                    .getString("Description"));

                        }
                    } catch (JSONException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    CustomGridPizza adapter = new CustomGridPizza(
                            getActivity(), descriptions, imageUrls);
                    grid.setAdapter(adapter);

                }

            });

            mQuickReturnViewIta
            .setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {

                    try {
                        if ((object.getString("MainCategoryID"))
                                .equals("1")
                                && (object
                                        .getString("SubCategoryID"))
                                        .equals("2")) {
                            Log.i("ImageURL ",
                                    object.getString("ImageURL"));
                            imageUrls.add(object
                                    .getString("ImageURL"));
                            Log.i("Description ",
                                    object.getString("Description"));
                            descriptions.add(object
                                    .getString("Description"));
                        }
                    } catch (JSONException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    CustomGridPizza adapter = new CustomGridPizza(
                            getActivity(), descriptions, imageUrls);
                    grid.setAdapter(adapter);

                }

            });
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

使用此代码时，它只加载1个项目，当按住文本视图时，它会逐个添加相同的项目。

我需要帮助才能立即将项目加载到网格中。任何帮助将不胜感激。

Answer 1

对于每个JSON对象，您正在创建一个新的OnClickListener并通过调用setOnClickListener覆盖最后一个，所以基本上您总是添加最后一个JSON对象。您需要创建/设置for循环的OnClickListener和适配器外部。

try {
        final List<String> descriptions1 = new ArrayList<String>();
        final List<String> imageUrls1 = new ArrayList<String>();

        final List<String> descriptions2 = new ArrayList<String>();
        final List<String> imageUrls2 = new ArrayList<String>();

        for (int i = 0; i < responseJson.length(); ++i) {
            final JSONObject object = responseJson.getJSONObject(i);

            try {
                if ((object.getString("MainCategoryID"))
                        .equals("1")
                        && (object
                        .getString("SubCategoryID"))
                        .equals("1")) {
                    Log.i("ImageURL ",
                            object.getString("ImageURL"));
                    imageUrls1.add(object
                            .getString("ImageURL"));
                    Log.i("Description ",
                            object.getString("Description"));
                    descriptions1.add(object
                            .getString("Description"));

                }else if ((object.getString("MainCategoryID"))
                        .equals("1")
                        && (object
                        .getString("SubCategoryID"))
                        .equals("2")) {
                    Log.i("ImageURL ",
                            object.getString("ImageURL"));
                    imageUrls2.add(object
                            .getString("ImageURL"));
                    Log.i("Description ",
                            object.getString("Description"));
                    descriptions2.add(object
                            .getString("Description"));
                }
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            mQuickReturnViewTop
                    .setOnClickListener(new View.OnClickListener() {

                        @Override
                        public void onClick(View v) {



                            CustomGridPizza adapter = new CustomGridPizza(
                                    getActivity(), descriptions1, imageUrls1);
                            grid.setAdapter(adapter);

                        }

                    });

            mQuickReturnViewIta
                    .setOnClickListener(new View.OnClickListener() {

                        @Override
                        public void onClick(View v) {

                            CustomGridPizza adapter = new CustomGridPizza(
                                    getActivity(), descriptions2, imageUrls2);
                            grid.setAdapter(adapter);

                        }

                    });
        }
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

根据Textview单击将json数据加载到Gridview

1 个答案: