Question

使用Blogger API，我在列表视图中显示我博客的热门文章标题。在JSON响应中，我还获取相应帖子的URL。我想要做的是将相应的URL添加到标题中，这样当用户点击标题时，链接的帖子就会在浏览器中打开。我怎样才能做到这一点？

我的MainActivity.java

公共类MainActivity扩展了AppCompatActivity {

private String TAG = MainActivity.class.getSimpleName();

private ProgressDialog pDialog;
private ListView lv;

    // URL to get contacts JSON
    String baseUrl = "https://www.googleapis.com/blogger/v2/blogs/6648452808939065157/posts";
    String apiKey = "?key=" + BuildConfig.API_KEY;
    String blogUrl =  (baseUrl.concat(apiKey));

    //ArrayList<HashMap<String, String>> contactList;
    ArrayList<HashMap<String, String>> itemList;


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

        //contactList = new ArrayList<>();
        itemList = new ArrayList<>();

        lv = (ListView) findViewById(R.id.list);

        new GetItems().execute();
    }

    public void item_click(View view) {
        startActivity(new Intent(this, ContentActivity.class));
    }

    /**
     * Async task class to get json by making HTTP call
     */
    private class GetItems extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Showing progress dialog
            pDialog = new ProgressDialog(MainActivity.this);
            pDialog.setMessage("Please wait...");
            pDialog.setCancelable(false);
            pDialog.show();

        }

@Override
protected Void doInBackground(Void... arg0) {
     HttpHandler sh = new HttpHandler();

     // Making a request to url and getting response
     String jsonStr = sh.makeServiceCall(blogUrl);
            Log.e(TAG, "Response from url: " + jsonStr);

     if (jsonStr != null) {
                try {
                    JSONObject jsonObj = new JSONObject(jsonStr);

                    // Getting JSON Array node
                    JSONArray items = jsonObj.getJSONArray("items");

                    // looping through Latest Articles
                    for (int i = 0; i < 1; i++) {
                        JSONObject c = items.getJSONObject(i);

                        String title = c.getString("title");
                        String post_url = c.getString("url");




                        HashMap<String, String> item = new HashMap<>();

                        // adding each child node to HashMap key => value

                        item.put("title", title);
                        item.put("url",post_url);

                        // adding item to article list
                        itemList.add(item);
                    }
                } catch (final JSONException e) {
                    Log.e(TAG, "Json parsing error: " + e.getMessage());
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Toast.makeText(getApplicationContext(),
                                    "Json parsing error: " + e.getMessage(),
                                    Toast.LENGTH_LONG)
                                    .show();
                        }
                    });

                }
            } else {
                Log.e(TAG, "Couldn't get json from server.");
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(getApplicationContext(),
                                "Couldn't get json from server. Check LogCat for possible errors!",
                                Toast.LENGTH_LONG)
                                .show();
                    }
                });

            }

            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);
            // Dismiss the progress dialog
            if (pDialog.isShowing())
                pDialog.dismiss();
            /**
             * Updating parsed JSON data into ListView
             * */

            ListAdapter adapter = new SimpleAdapter(MainActivity.this,
                    itemList,R.layout.list_item, new String[]{"title"},
                    new int[]{R.id.title});

            lv.setAdapter(adapter);
        }

    }
}

Answer 1

您应该在ListView适配器的标题上添加OnClickListener。通过设置yourTextView.setClickable(true);后跟yourTextView.setOnClickListener(clickListener);。

，可以轻松实现这一目标

我看到您将整个hashedMap itemList已解析的JSON数据传递给SimpleAdapter构造函数。在您的SimpleAdapter OnClickListener内，您可以使用WebView并通过从HashMap中检索来显示该网址。您可以使用getAdapterPosition()获取点击的排名。使用SimpleAdapter代码更新帖子也会有所帮助。

将URL添加到Parsed Json数据中

1 个答案: