主页 / 问题 / 709955
Accepted
Likhanov
Asked:2020-08-24 17:13:09 +0000 UTC2020-08-24 17:13:09 +0000 UTC

安卓异步任务

  • 772

有以下代码

mSubmitButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (TextUtils.isEmpty(mAnswerEditText.getText())
                        || TextUtils.isEmpty(mEmailEditText.getText()))
                    Toast.makeText(getContext(),
                            "Заполните поля ответа и email", Toast.LENGTH_LONG).show();
                else if (!isValidEmail(mEmailEditText.getText())) {
                    Toast.makeText(getContext(),
                            "Укажите правильный email", Toast.LENGTH_LONG).show();
                } else {
                    String[] strings = {
                            mAnswerEditText.getText().toString(),
                            mEmailEditText.getText().toString(),
                            mAd.getEmail()};

                    new CreateAdTask().execute(strings);

                    Toast.makeText(getContext(),
                            "Сообщение отправлено!", Toast.LENGTH_LONG).show();
                    getActivity().finish();
                }
            }
        });  

private class CreateAdTask extends AsyncTask<String[], Void, Void> {

        @Override
        protected Void doInBackground(String[]... params) {
            ServerHelper.getInstance().sendAnswer(
                    params[0].toString(),
                    params[1].toString(),
                    params[2].toString());
            return null;
        }
    }

错误日志

08-24 09:08:11.029 14188-14259/com.likhanov.adservice E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #3
                                                                        Process: com.likhanov.adservice, PID: 14188
                                                                        java.lang.RuntimeException: An error occurred while executing doInBackground()
                                                                            at android.os.AsyncTask$3.done(AsyncTask.java:325)
                                                                            at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
                                                                            at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
                                                                            at java.util.concurrent.FutureTask.run(FutureTask.java:242)
                                                                            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:243)
                                                                            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
                                                                            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
                                                                            at java.lang.Thread.run(Thread.java:761)
                                                                         Caused by: java.lang.ArrayIndexOutOfBoundsException: length=1; index=1
                                                                            at com.likhanov.adservice.AdFragment$CreateAdTask.doInBackground(AdFragment.java:96)
                                                                            at com.likhanov.adservice.AdFragment$CreateAdTask.doInBackground(AdFragment.java:91)
                                                                            at android.os.AsyncTask$2.call(AsyncTask.java:305)
                                                                            at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                                                                            at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:243) 
                                                                            at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) 
                                                                            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 
                                                                            at java.lang.Thread.run(Thread.java:761) 

第 96 行是 params[0].toString()。我无法弄清楚为什么此时我会溢出数组。显然有必要以不同的方式传递参数，如何做到这一点？

java

1 个回答

  1. Best Answer

    该表示法String[]... params意味着您可以将不定数量的参数传递给该方法。并且该变量params将包含这些类型参数的数组String[]。

    也就是说，要访问以您拥有的方式传递的参数，条目应该是这样的：

    params[0][0].toString();
params[0][1].toString();
params[0][2].toString();

    或者您可以将方法签名更改为doInBackground(String... params)并将数据传递给它，如下所示：

    new CreateAdTask().execute(mAnswerEditText.getText().toString(),
                           mEmailEditText.getText().toString(),
                           mAd.getEmail());

    并按照您现在的方式获取它们。

    • 2

相关问题