Question

我正在尝试使用doInBackground方法中从外部类获取的值。

我已经在onCreate（）中完成了所有工作，但是，获得这些值的正确方法是什么？

无论如何，我也可以接受其他方式来获取请求。

这是我的代码：

    public class MenuActivity extends Activity {

    cUserData ud = new cUserData(this); //This is my external class

    String email;

    String phone;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_menu);


        Bundle bundle = this.getIntent().getExtras();

        ((myApp) this.getApplication()).setSomeVariable(bundle.getString("email"));


        cUserData ud = new cUserData(this);

        String email= ud.getEmail; //I get the values from the external class

        String phone = ud.getTelephone();

        new HttpAsyncTask().execute();     
    }


    private class HttpAsyncTask extends AsyncTask<String, Void, String> {

        @Override

        protected String doInBackground(String... urls) {

            String mEmail = email; //These values are null

            String mPhone = phone;

        String url = "http://www.myUrl.com/app/get.aspx?email=" + mEmail + "&telephone=" + mPhone;

            HttpClient Client = new DefaultHttpClient();

            HttpGet httpget = new HttpGet(url);

            try {

            Client.execute(httpget);

            } catch (ClientProtocolException e) {

            e.printStackTrace();

            } catch (IOException e) {

            e.printStackTrace();

            }

            return null;

        }
    }
}

Answer 1

您可以在执行调用中传递这些值，如

HttpAsyncTask.execute(client);

然后创建一个类似

的客户端类

public class Client{
     public CLient(String email, String phNum){
        this.email = email;
        this.phNum = phNum;
     }
}

在此之后，AsyncTask需要稍微改变，以便它扩展AsyncTask

Answer 2

如果我是你，我会使用AsyncTask，如下所示：

public class MenuActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_menu);


        Bundle bundle = this.getIntent().getExtras();

        ((LennyTracer) this.getApplication()).setSomeVariable(bundle.getString("email"));

        new HttpAsyncTask().execute(new cUserData(this));
    }

    private class HttpAsyncTask extends AsyncTask<cUserData, Void, String> {

        @Override

        protected String doInBackground(cUserData[] cUserDatas) {

            String mEmail = cUserDatas.getEmail();

            String mPhone = cUserDatas.getTelephone();

            String url = "http://www.myUrl.com/app/get.aspx?email=" + mEmail + "&telephone=" + mPhone;

            HttpClient Client = new DefaultHttpClient();

            HttpGet httpget = new HttpGet(url);

            try {

                Client.execute(httpget);

            } catch (ClientProtocolException e) {

                 e.printStackTrace();

            } catch (IOException e) {

                 e.printStackTrace();

            }

            return null;

        }

    }
}

但是，有许多用于异步http请求的库可以更有效地处理进程。看看这些库：

http://loopj.com/android-async-http/

http://projects.spring.io/spring-android/

http://developer.android.com/training/volley/index.html

Answer 3

public class MenuActivity extends Activity {

cUserData ud = new cUserData(this); //This is my external class

String email;

String phone;

@Override

public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_menu);



    Bundle bundle = this.getIntent().getExtras();

    ((myApp) this.getApplication()).setSomeVariable(bundle.getString("email"));



    cUserData ud = new cUserData(this);

    String email= ud.getEmail; //I get the values from the external class

    String phone = ud.getTelephone();

    String mDataUrl ="www.myurl.com";
    mDataUrl += "?email="  + email;
    mDataUrl += "&telephone="  + phone;


    new HttpAsyncTask().execute(mDataUrl);     
}



private class HttpAsyncTask extends AsyncTask<String, Void, String> {

    @Override

    protected String doInBackground(String... urls) {
        return getData(urls[0]);
    }
}

public static String getData(String dataUrl){
//NOW I CAN USE VALUES
}

}

使用从HttpAsyncTask中的外部类获得的值

3 个答案: