AsyncTask 作为一个单独的类

Question

如果我有一个 AsyncTask 作为一个单独的类，并且我从一个 Activity 运行 AsyncTask，AsyncTask 是否会持有对 Activity 的引用，就像它是后者的内部类一样？ 还是解决了内存泄漏的问题？

另外，将包裹在 WeakReference 中的上下文传递给 AsyncTask 是否会做出任何改变？

Answer 1

你可以像这样使用并获得活动的反射

public class DeleteUserTask extends AsyncTask<String, String, String> {
    private Context context;
    private JSONObject Object, Object1;
    public static String Success, Exception;
    public static boolean isClick;

    public DeleteUserTask(Context ctx) {
        context = ctx;
    }

    @Override
    protected void onPreExecute() {
        OrganizationUser_EditProfileScreen.pb.setVisibility(View.VISIBLE);
    }

    @Override
    protected String doInBackground(String... params) {
        try {
            ActivityBase.result = null;
            Log.e("", "Request-->" + writeJSON().toString());
            ActivityBase.PostMethod(context,
                    WebServiceLinks.UserStatusButtonTask, writeJSON());
            Object = new JSONObject(ActivityBase.result);
            Object1 = Object
                    .getJSONObject("OrganizationUserProfileButtonUpdateResult");
            Success = Object1.getString("Success");
            Exception = Object1.getString("Exception");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(String result) {
        try {
            OrganizationUser_EditProfileScreen.pb.setVisibility(View.GONE);
            if (ActivityBase.result != null && Success == "true") {
                ActivityBase
                        .GeneralDialog(R.string.account, Exception, context);

            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public JSONObject writeJSON() {
        JSONObject object = new JSONObject();
        try {

            object.put("OrgID", OrganizationLoginTask.OrgID);
            object.put("OrgUserID", Search_Screen.OrgUserID);
            object.put("Status", OrganizationUser_EditProfileScreen.Status);
            object.put("ModifiedByTypeCode", "2");

            object.put("ModifiedSourceCode", "8");

        } catch (Exception e) {
            e.printStackTrace();
        }
        return object;
    }
}