Android手机连接服务器端实现登陆

public class LoginActivity extends Activity {

private EditText et_name;

private EditText et_pass;

private TextView tv_result;

private final int CHANGETEXTVIEW = 1;

// 消息处理者

private Handler handler = new Handler() {

@Override

public void handleMessage(Message msg) {

super.handleMessage(msg);

int what = msg.what;// 标识

switch (what) {

case CHANGETEXTVIEW:

String result = (String) msg.obj;

//设置结果

tv_result.setText(result);

//吐司结果

Toast.makeText(LoginActivity.this,result,1).show();

break;

default:

break;

}

}

};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_login);

et_name = (EditText) findViewById(R.id.username);

et_pass = (EditText) findViewById(R.id.userpass);

tv_result = (TextView) findViewById(R.id.textView);

}

public void login(View v) {

int id = v.getId();

switch (id) {

case R.id.login:

final String userName = et_name.getText().toString();

final String userPass = et_pass.getText().toString();

if (TextUtils.isEmpty(userName) || TextUtils.isEmpty(userPass)) {

Toast.makeText(this, "用户名或者密码不能为空", Toast.LENGTH_LONG).show();

} else {

Toast.makeText(this, "发送请求到服务器", Toast.LENGTH_LONG).show();

new Thread() {

public void run() {

try {

//请求的地址

String spec = "http://172.16.237.119:8989/Login/login.do";

//根据地址创建URL对象

URL url = new URL(spec);

//根据URL对象打开链接

HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

//设置请求方式

urlConnection.setRequestMethod("POST");

urlConnection.setReadTimeout(5000);// 设置超时时间

urlConnection.setConnectTimeout(5000);// 设置连接时间



String data = URLEncoder.encode(userName,"UTF-8") + "&userpass=" + URLEncoder.encode(userPass,"UTF-8");



//设置请求头



urlConnection.setRequestProperty("Connection", "Keep-Alive");

urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

urlConnection.setRequestProperty("Content-Length", String.valueOf(data.getBytes().length));

urlConnection.

setRequestProperty("User-Agent",

"Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0E; InfoPath.3; .NET4.0C)");



urlConnection.setDoOutput(true);

urlConnection.setDoInput(true);



OutputStream os = urlConnection.getOutputStream();



/*DataOutputStream dataOutputStream = new DataOutputStream(os);



dataOutputStream.write(buffer);*/



os.write(data.getBytes());

System.out.println("******************"+data+"***********");



os.flush();

if(urlConnection.getResponseCode()==200){

// 输入流对象

InputStream is = urlConnection.getInputStream();

// 通过工具类处理

String result = StreamTools.streamToStr(is);

Message msg = new Message();

msg.what = CHANGETEXTVIEW;

msg.obj = result;// 改变的内容，obj带过去

handler.sendMessage(msg);//发送消息

}else{

System.out.println("连接失败...........");

}



} catch (Exception e) {

e.printStackTrace();



}

};

}.start();

}

break;

default:

break;

}

}

public void get(String userName,String userPass){

try {

// 请求地址

String spec = "http://172.16.237.119:8989/Login/login.do?username="

+ URLEncoder.encode(userName,"UTF-8") + "&userpass=" + URLEncoder.encode(userPass,"UTF-8");

// 根据地址创建URL对象(网络访问的url)

URL url = new URL(spec);

// url.openConnection()打开网络连接

HttpURLConnection urlConnection = (HttpURLConnection) url

.openConnection();

urlConnection.setRequestMethod("GET");// 设置请求方式

urlConnection.setReadTimeout(5000);// 设置超时时间

urlConnection.setConnectTimeout(5000);// 设置连接时间

urlConnection

.setRequestProperty(

"User-Agent",

"Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0E; InfoPath.3; .NET4.0C");

// 获取相应的code 404 200 505 302

if (urlConnection.getResponseCode() == 200) {

// 输入流对象

InputStream is = urlConnection.getInputStream();

// 通过工具类处理

String result = StreamTools.streamToStr(is);

Message msg = new Message();

msg.what = CHANGETEXTVIEW;

msg.obj = result;// 改变的内容，obj带过去



handler.sendMessage(msg);//发送消息

}else{

System.out.println("链接失败");

}

} catch (Exception e) {

e.printStackTrace();

System.out.println("连接失败...........");

}

}

}

其中运用到工具类：Streamstools

public static String streamToStr(InputStream is){



try{

// 字节输出流

ByteArrayOutputStream os = new ByteArrayOutputStream();

// 定义读取长度

int len = 0;

// 定义缓冲区

byte buffer[] = new byte[1024];

// 从输入流中读取，并写入到os中

while ((len = is.read(buffer)) != -1) {

os.write(buffer, 0, len);

}

is.close();

os.close();

// 写到字节流

return new String(os.toByteArray(),"gbk");

//return new String(os.toByteArray());

}catch(Exception e){

e.printStackTrace();

return null;

}

}