Question

我有2个EditText字段，分别是电子邮件和姓名。当用户单击按钮时，我会在AsyncTask onPreExecute（）方法中获得这两个字段的值。我的问题是我现在如何将该值传递给 doInBackground（）方法并将其插入到字符串答案中？我了解到你不应该将UI项目传递到 doInBackground（）。我一直在这里搜索并测试代码的不同变体，但不断获得Null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。您似乎已将其设置为将其传递到execute()。

1）转入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）检索onPreExecute()

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

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

Android如何从onprexecute传递GetText来执行onBackground

1 个答案: