java Android如何将GetText从onprexecute传递到onBackground

Question

我有两个编辑文本字段，分别是email和name。当用户单击按钮时，我会在AsyncTaskonPreExecute（）方法中获得这两个字段的值。我的问题是，现在如何将该值传递给doInBackground（）方法，并将其插入字符串答案中？我学到了不应该将UI项传递到doInBackground（）。我一直在这里搜索并测试代码的不同变体，但不断得到空值

    private class myprofile extends AsyncTask<String,Void,Boolean> {



        @Override
        protected void onPreExecute() {
            super.onPreExecute();

            Email= (EditText)findViewById(R.id.email);
            String email= Email.getText().toString();


            Name= (EditText)findViewById(R.id.name);
            String name= Name.getText().toString();

        }

        @Override
        protected Boolean doInBackground(String... params) {

            String email = params[0];
            String name = params[1];



            String Answers="email="+email+"&name="+name;

            return null;

        }

       // @Override
        protected void onPostExecute(Boolean result) {

        }
    }

Answer 1

有很多方法可以做到这一点。看起来你已经准备好将它们传递到execute()

1）传入AsyncTask.execute()

String email= Email.getText().toString();
String name= Name.getText().toString();
new myprofile().execute(email, name);

2）传递给构造函数

private class myprofile extends AsyncTask<Void,Void,Boolean> {
    private String email;
    private String name;
    public myprofile(String email, String name){
        this.email = email;
        this.name = name;
    }
    ...
}

---

String email= Email.getText().toString();
String name= Name.getText().toString();
new myprofile(email, name).execute();

3）在onPreExecute()中检索

private String email;
private String name;
protected void onPreExecute() {
    super.onPreExecute();

    email = Email.getText().toString();
    name = Name.getText().toString();
}