您应该创建一个ArrayList如下所示的。

ArrayList<String> spinnerArray = new ArrayList<String>();

Spinner 与 Spinner 相关联Adapter view，因此要在 Spinner 中填充数据，您需要使用adapter. Anadapter是UI组件和数据源之间的桥梁，帮助我们向UI组件填充数据。

只需您可以像下面一样使用ArrayAdapter（要使用自定义适配器，请参阅此）

ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>

        (this, android.R.layout.simple_spinner_item,

       spinnerArray);

之后，您必须将您的设置设置adapter为spinner如下所示。

spin.setAdapter(spinnerArrayAdapter); 

示例：您的代码应如下所示。

ArrayList<String> spinnerArray;

ArrayAdapter<String> spinnerArrayAdapter

@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.popup);

    WayPointData = new SubscribedData<>();

    final Type WayPointType = new TypeToken<SubscribedData<WayPoint>>() {

    }.getType();

    // spinner element

    spin = (Spinner) findViewById(R.id.spinner);

    spinnerArray = new ArrayList<String>();

    spinnerArrayAdapter = new ArrayAdapter<String>

            (this, android.R.layout.simple_spinner_item,

           spinnerArray);

    spin.setAdapter(spinnerArrayAdapter);

    rosbridge = new RosbridgeListener("ws://10.24.204.231:9090");

    rosbridge.setOnDataReceivedListener(new RosbridgeMessageListener() {

        /**

         * a running thread that when the connection is made the data of the topic will serialize and deserialized java objects

         * to (and from) JSON.

         * @param msg

         */

        @Override

        public void onDataReceived(final String msg) {

            try {

                runOnUiThread(  new Runnable() {

                    @Override

                    public void run() {

                        try {

                            WayPointData = new Gson().fromJson(msg,WayPointType);

                            // modify below lines like

                            JSONObject mainObject = new JSONObject(msg); // add msg in JSONObject parameter

                            JSONObject msgObject = mainObject.getJSONObject("msg"); // get msgObject from main object

                            JSONArray wayPointJsonArray = msgObject.getJSONArray("waypoints"); // get wayPointJsonAarry from msg object

                            for (int i = 0; i < wayPointJsonArray.length(); i++) {

                                JSONObject wayPointJsonObject = wayPointJsonArray.getJSONObject(i);

                                // Parse name

                                String name = wayPointJsonObject.getString("name");

                                WayPoint wayPoint = new WayPoint();

                                wayPoint.name = name;

                               // here you have to add name to your spinner array

                               spinnerArray.add(name)

                            }

                           // After all your data added to arraylist you should notify adapter that data set changed

                           spinnerArrayAdapter.notifyDataSetChanged();

                        } catch (Exception e) {

                            e.printStackTrace();

                        }

                    }

                });

                /** a msg that will display once the data is received **/

                Log.d("B9T", String.format("Received data: %s", msg));

            } catch (Exception e) {

                e.printStackTrace();

            }

        }

    });

    spin.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

        @Override

        public void onItemSelected(AdapterView<?> parent, View view, int p, long id) {

            WayPoint wayPoint = (WayPoint) parent.getItemAtPosition(p);

        }

        @Override

        public void onNothingSelected(AdapterView<?> parent) {

        }

    });

    /** a set of the waypoints popup window **/

    DisplayMetrics dm = new DisplayMetrics();

    getWindowManager().getDefaultDisplay().getMetrics(dm);

    int width = dm.widthPixels;

    int height = dm.heightPixels;

    getWindow().setLayout((int) (width * .6), (int) (height * .6));

  }

}