java - getBaseContext() 解析数据时出错

Question

此代码用于尝试 registation.class android studio 应用程序来解析数据。我的代码在最后的 getBaseContext() 代码下不断给我错误，我不知道为什么，因为我认为它看起来不错!!!该代码适用于实验室，因此它应该是正确的，但我不断出错!!!!

谁能告诉我？？任何帮助将非常感激!谢谢

 public class AttemptRegistration extends
    AsyncTask<String, Integer, String> {

int success;
String message = " ";

@Override
protected String doInBackground(String... args) {
    try {
        Map<String, String> params = new HashMap<String, String>();
        params.put("tag", "register");
        params.put("username", args[0]);
        params.put("password", args[1]);
        params.put("email", args[2]);

        //
        HttpUtility.sendPostRequest(params);

        //


        String response = HttpUtility.readRespone();

        JSONObject jObj = null;

        try {

            jObj = new JSONObject(response);

            success = jObj.getInt("success");
            message = jObj.getString("message");


        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data" + e.toString());
        }
        } catch (IOException ex) {
            ex.printStackTrace();
        }

        HttpUtility.disconnect();
        return message;

}
    protected void onPostExecute(String status) {

    if (status !=null) {

        Toast.makeText(getBaseContext(), status, Toast.LENGTH_LONG).show();

        if(success == 1) {
            startActivity (new Intent(getBaseContext(), LoginActivity.class));
        }
    }

Answer 1

.My code keeps giving me errors under my getBaseContext() code at the end and I have no idea why as I think it looks ok!!!

getBaseContext()是 ContextWrapper 的一个方法。由于您收到 cannot resolve the method 错误，这意味着您的 AsyncTask 类未定义为继承自 ContextWrapper 的类的内部类> (Activity 例如)。您可以将 Context 传递给您的 AsyncTask 。

public class AttemptRegistration extends AsyncTask<String, Integer, String> {
    private final Context mContext;
    public AttemptRegistration(Context context) {
       mContext = context;
    }

然后使用 mContext 代替 getBaseContext()