仅列表阵列的项目出现在旋转器中

Question

我目前正在开发列出所有符合其城市的计数器所需的，我正在使用 battuta api为此目的不幸的是，只有最后一项出现在那里（旋转器）

for (int i=0; i<response.length(); i++){
                        try {
                            worldlist = new ArrayList<String>();
                            ID = response.getJSONObject(i).getString("code");
                            name = response.getJSONObject(i).getString("name");
                            // Retrieve the name on the Spinne
                            worldlist.add(name);
                            System.out.println("Namen"+name);
                          //  System.out.println("WorldList"+worldlist.toString());
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                       ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, worldlist);
                       spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
                       spinner.setAdapter(spinnerArrayAdapter);
                       spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                           @Override
                           public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {

                           }
                           @Override
                           public void onNothingSelected(AdapterView<?> adapterView) {
                           }
                       });

                   }


                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            error.printStackTrace();
            System.out.println("Error"+error.getMessage());

        }
    });
    mQueue.add(request);

Answer 1

我想您的逻辑代码不正确，请尝试将wordlist声明和Init Spinner适配器放在外面进行循环。

worldlist = new ArrayList<String>();
for (int i = 0; i < response.length(); i++) {
    try {
        ID = response.getJSONObject(i).getString("code");
        name = response.getJSONObject(i).getString("name");
        // Retrieve the name on the Spinne
        worldlist.add(name);
        System.out.println("Namen"+name);
        // System.out.println("WorldList"+worldlist.toString());
    } catch (JSONException e) {
        e.printStackTrace();
    }
}
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, worldlist);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down view
spinner.setAdapter(spinnerArrayAdapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {

    }
    @Override
    public void onNothingSelected(AdapterView<?> adapterView) {
    }
});