java - 使用 onPostExecute 设置全局数组值时出现问题

Question

我正在尝试设置全局定义的 String[] placesSuggestion;使用onPostExecute AsyncTask<String, String, String[]>的

onPostExecute方法如下:

@Override
    protected void onPostExecute(String[] suggestionArray){
        //Log.d("suggestionArray", Arrays.toString(suggestionArray));
        super.onPostExecute(suggestionArray);
        fillPlacesSuggestion(suggestionArray);
        Log.d("suggestionArray", Arrays.toString(suggestionArray));
    }

fillPlacesSuggestion函数如下所示:

public void fillPlacesSuggestion(String[] suggestionArray){
    placesSuggestion = suggestionArray;
}

onCreate方法如下:

 super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    sourceET = (EditText) findViewById(R.id.sourceEditText);
    destinationET = (EditText) findViewById(R.id.destinationEditText);
    new MyAsyncTask().execute();
    Log.d("placesSuggestion", Arrays.toString(placesSuggestion));

suggestionArray log 给出了预期值，但是 placeSuggestion日志不是。

谁能帮我解决这个问题，因为我对 Android 开发非常陌生。

Answer 1

当您尝试记录此内容时:

Log.d("placesSuggestion", Arrays.toString(placesSuggestion));

任务尚未完成。如果您想获得正确的地方建议值，请等待

MyAsyncTask task = new MyAsyncTask();
task.execute();
if (task.get() != null) // waiting for it
{
    Log.d("placesSuggestion", Arrays.toString(placesSuggestion));
}