Question

我有一个json数组，我使用for循环遍历每个对象以获取作者名称。如果作者姓名等于我输入的作者姓名，则该名称将添加到arraylist中。然后使用阵列适配器调整该阵列列表。

但这是我的问题 - 我正在使用这种方法搜索json数组来查找匹配项。

private void updateListView() {
    ArrayList<String> arrayList = new ArrayList<String>();

    try {
        JSONArray jsonArray = mBlogData.getJSONArray("posts");


        for (int i = 0 ; i <jsonArray.length() ; i++ ) {
            JSONObject post = jsonArray.getJSONObject(i);
            String stringPost = post.getString(KEY_AUTHOR);
            Log.v(TAG , stringPost);
            if (stringPost.equals("Guil Hernandez")) {
                arrayList.add(stringPost);
            } else {
                Log.v(TAG , "no match " + stringPost);
            }
        }

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(MyActivity.this , android.R.layout.simple_list_item_1,
               arrayList);
        setListAdapter(adapter);

所以现在我有我的过滤数据....我想对每个结果都有意图。所以我这样做

 @Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);

    JSONArray jsonArrayy = null;

    try {
        jsonArrayy = mBlogData.getJSONArray("posts");
        JSONObject jPost = jsonArrayy.getJSONObject(position);
        String url = jPost.getString("url");

        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setData(Uri.parse(url));
        startActivity(intent);

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

但因为数据被过滤掉了......它打开了错误的网址！我不知道如何设置我的意图，因此它将获取过滤数据的URL ...请帮助。如果这是令人困惑的完整代码和JSON数据将在下面列出并随时问我任何问题！谢谢。

public class MyActivity extends ListActivity {

public final static String TAG = MyActivity.class.getSimpleName();



protected JSONObject mBlogData;

private final String KEY_AUTHOR = "author";
private final String KEY_TITLE = "title";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_my);

    if (networkIsAvailable()) {
        GetNameData getNameData = new GetNameData();
        getNameData.execute();
    }
}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);

    JSONArray jsonArrayy = null;

    try {
        jsonArrayy = mBlogData.getJSONArray("posts");
        JSONObject jPost = jsonArrayy.getJSONObject(position);
        String url = jPost.getString("url");

        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setData(Uri.parse(url));
        startActivity(intent);

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

private boolean networkIsAvailable() {
    boolean isOn = false;
    ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = manager.getActiveNetworkInfo();
    if ( networkInfo != null && networkInfo.isConnected()) {
        isOn = true;
    }
    return isOn;
}

private void updateListView() {
    ArrayList<String> arrayList = new ArrayList<String>();

    try {
        JSONArray jsonArray = mBlogData.getJSONArray("posts");


        for (int i = 0 ; i <jsonArray.length() ; i++ ) {
            JSONObject post = jsonArray.getJSONObject(i);
            String stringPost = post.getString(KEY_AUTHOR);
            Log.v(TAG , stringPost);
            if (stringPost.equals("Guil Hernandez")) {
                arrayList.add(stringPost);
            } else {
                Log.v(TAG , "no match " + stringPost);
            }
        }

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(MyActivity.this , android.R.layout.simple_list_item_1,
               arrayList);
        setListAdapter(adapter);



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

}

private class GetNameData extends AsyncTask< Object , Void , JSONObject> {

    @Override
    protected JSONObject doInBackground(Object... objects) {

        int responseCode = -1;

        JSONObject jsonResponse = null;

        try {
            URL bloFeedUrl = new URL("http://blog.teamtreehouse.com/api/get_recent_summary/?count=20");
            HttpURLConnection connection = (HttpURLConnection) bloFeedUrl.openConnection();
            connection.connect();

            responseCode = connection.getResponseCode();

            if (responseCode == 200) {
                InputStream inputStream = connection.getInputStream();
                StringBuilder builder = new StringBuilder();
                byte[] array = new byte[8092];
                int read = 0;

                while ((read = inputStream.read(array)) != -1) {
                    builder.append(new String(array, 0, read));
                }

                jsonResponse = new JSONObject(builder.toString());
            }

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return jsonResponse;
    }

    @Override
    protected void onPostExecute(JSONObject jsonObject) {
        mBlogData = jsonObject;
        updateListView();
        }
    }
 }

JSON

{
status: "ok",
count: 20,
count_total: 1949,
pages: 98,
posts: [
{
id: 24680,
url: "http://blog.teamtreehouse.com/create-sticky-navigation",
title: "How to Create a Sticky Navigation",
date: "2015-02-05 14:44:13",
author: "Guil Hernandez",
thumbnail: "http://blog.teamtreehouse.com/wp-content/uploads/2015/01/sticky-150x150.jpg"
},

ECT ......

Answer 1

您可以创建另一个列表并保存所需的网址，就像使用arrayList一样。然后在列表项上单击执行以下操作：

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
   super.onListItemClick(l, v, position, id);

      String url = urlsList.get(position); // your new urls list

      Intent intent = new Intent(Intent.ACTION_VIEW);
      intent.setData(Uri.parse(url));
      startActivity(intent);
}

Answer 2

列表视图中的顺序与您正在使用的数组中的顺序不同，因为您正在过滤数据，因此您可以使用帖子保留网址，如果您使用对象会更好。

Answer 3

这是我提出的解决方案。这是非常邋。的。如果你有更好的想法/或建议，请告诉我

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);

    JSONArray jsonArrayy = null;
    ArrayList<String> urlList = new ArrayList<String>();

    try {
        jsonArrayy = mBlogData.getJSONArray("posts");

        for ( int i = 0 ; i < jsonArrayy.length() ; i++) {
            JSONObject post = jsonArrayy.getJSONObject(i);
            String stringPost = post.getString(KEY_AUTHOR);
            String url = post.getString("url");
            Log.v(TAG , stringPost);
            if (stringPost.equals(mName)) {

                urlList.add(url);
            } else {
                Log.v(TAG , "no match " + stringPost);
            }

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

    String urlTwo = urlList.get(position);



    // try {
     //   jsonArrayy = mBlogData.getJSONArray("posts");
       // JSONObject jPost = jsonArrayy.getJSONObject(position);
       // String url = jPost.getString("url");

      Intent intent = new Intent(Intent.ACTION_VIEW);
      intent.setData(Uri.parse(urlTwo));
       startActivity(intent);


}

我对排序列表视图的意图将无法正常工作

3 个答案: