Runnable Handler

线程  和   操作通讯

package com.ningbo.c21.nbxt;

import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.sql.SQLOutput;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Login extends Activity {
private EditText login_name;
private EditText login_paw;
private Button login_but;
private Handlerhandler=null;
HttpClient client;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
client = new DefaultHttpClient();

login_name = (EditText)findViewById(R.id.login_name);
login_paw = (EditText)findViewById(R.id.login_paw);
login_but = (Button)findViewById(R.id.login_button);

login_but.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

//                readNet("http://www.c21ningbo.com.cn/APP_Houseinfo/Login.asmx/HasUser", login_name.getText().toString(), login_paw.getText().toString());
//                readNet("http://www.c21ningbo.com.cn/APP_Houseinfo/LoginMethod.ashx?method=HasUser", login_name.getText().toString(), login_paw.getText().toString());
//                Login.this.finish();
//new Thread(networkTask).start();

//开一条子线程加载网络数据
Runnable runnable=new Runnable()
{
public void run() {
// 在这里进行 http request.网络请求相关操作
HttpPost post = new HttpPost("http://www********");
String mess = "";
try {
List<BasicNameValuePair> list = new ArrayList<BasicNameValuePair>();
list.add(new BasicNameValuePair("userid", login_name.getText().toString()));
list.add(new BasicNameValuePair("pwd", login_paw.getText().toString()));
post.setEntity(new UrlEncodedFormEntity(list));
HttpResponse response = client.execute(post);
mess = EntityUtils.toString(response.getEntity());

}
catch (Exception ex)
{
ex.printStackTrace();
}
//发送消息，并把mess结合对象传递过去
handler.sendMessage(handler.obtainMessage(0, mess)); //关键字是0
}
};

new Thread(runnable).start();
handler = new Handler(){
@Override
public void handleMessage(Message msg) {
String mymess = msg.obj.toString();
if(mymess.equals("错误") || mymess == null || mymess.equals("")){
loginFalseDoing();
}
else {
loginTrueDoing(mymess);
}
}
};

//                try
//                {
//                    //开启线程
//                    new Thread(runnable).start();
//                    //handler与线程之间的通信及数据处理
//                    handler=new Handler()
//                    {
//                        public void handleMessage(Message msg)
//                        {
//                            if(msg.what == 0)
//                            {
//                                //msg.obj是获取handler发送信息传来的数据
//                                @SuppressWarnings("unchecked")
//                                //ArrayList<Person> person=(ArrayList<Person>) msg.obj;
//                                        //给ListView绑定数据
//                                        String mygetstring = (String) msg.obj;
//                                if(mygetstring.equals("错误") || mygetstring == null || mygetstring.equals("")){
//                                    loginFalseDoing();
//                                }
//                                else {
//                                    loginTrueDoing(mygetstring);
//                                }
//                            }
//                        }
//                    };
//                }
//                catch (Exception e)
//                {
//                    e.printStackTrace();
//                }
}
});

}

//login true
public void loginTrueDoing(String UserName){
SharedPreferences sharedPreferences = getSharedPreferences("mySP", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString("username", UserName);
editor.commit();
Login.this.finish();
}

//login false
private void loginFalseDoing()
{
//new AlertDialog.Builder(this).setTitle("确认").setMessage("确定吗？").setNegativeButton("",null).show();
AlertDialog dialog =new AlertDialog.Builder(this)
.setTitle("错误")
.setMessage("用户名或密码错误")
.setPositiveButton("确定",null)
.show();
}

}