简单的Android服务端和客户端登录交互（客户端）

HttpClientToServer.java


package com.bao;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
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.HttpGet;
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;

public class HttpClientToServer {

String urlAddress = "http://10.0.2.2:8080/AndroidServer/login.do";
public HttpClientToServer(){

}

public String doGet(String username,String password){

String getUrl = urlAddress + "?username="+username+"&password="+password;
HttpGet httpGet = new HttpGet(getUrl);
HttpClient hc = new DefaultHttpClient();
try {
HttpResponse ht = hc.execute(httpGet);
if(ht.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
HttpEntity he = ht.getEntity();
InputStream is = he.getContent();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String response = "";
String readLine = null;
while((readLine =br.readLine()) != null){
//response = br.readLine();
response = response + readLine;
}
is.close();
br.close();

//String str = EntityUtils.toString(he);
System.out.println("========="+response);
return response;
}else{
return "error";
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "exception";
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "exception";
}

}

public String doPost(String username,String password){
//String getUrl = urlAddress + "?username="+username+"&password="+password;
HttpPost httpPost = new HttpPost(urlAddress);
List params = new ArrayList();
NameValuePair pair1 = new BasicNameValuePair("username", username);
NameValuePair pair2 = new BasicNameValuePair("password", password);
params.add(pair1);
params.add(pair2);
HttpEntity he;
try {
he = new UrlEncodedFormEntity(params, "gbk");
httpPost.setEntity(he);
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

HttpClient hc = new DefaultHttpClient();
try {
HttpResponse ht = hc.execute(httpPost);
if(ht.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
HttpEntity het = ht.getEntity();
InputStream is = het.getContent();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String response = "";
String readLine = null;
while((readLine =br.readLine()) != null){
//response = br.readLine();
response = response + readLine;
}
is.close();
br.close();

//String str = EntityUtils.toString(he);
System.out.println("========="+response);
return response;
}else{
return "error";
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "exception";
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return "exception";
}

}

}
LoginActivity.java
package com.bao;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class LoginActivity extends Activity {
/** Called when the activity is first created. */

private EditText username;
private EditText password;
private Button login;
private Button reset;
UserManager userManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

username = (EditText)findViewById(R.id.username);
password = (EditText)findViewById(R.id.password);
login = (Button)findViewById(R.id.login);
reset = (Button)findViewById(R.id.reset);
userManager = new UserManager();
login.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
boolean isSuccess = userManager.isRightUser(username.getText().toString(), password.getText().toString());
if(isSuccess == true){
Toast.makeText(LoginActivity.this, "登录成功", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(LoginActivity.this, "密码或用户名错误", Toast.LENGTH_LONG).show();

}
}
});

reset.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
username.setText("");
password.setText("");
}
});

}
}UrlConnectionToServer.java
package com.bao;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class UrlConnectionToServer {

String urlAddress = "http://10.0.2.2:8080/AndroidServer/login.do";
URL url;
HttpURLConnection uRLConnection;
public UrlConnectionToServer(){

}

public String doGet(String username,String password){

String getUrl = urlAddress + "?username="+username+"&password="+password;
try {
url = new URL(getUrl);
uRLConnection = (HttpURLConnection)url.openConnection();
InputStream is = uRLConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String response = "";
String readLine = null;
while((readLine =br.readLine()) != null){
//response = br.readLine();
response = response + readLine;
}
is.close();
br.close();
uRLConnection.disconnect();
return response;
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}

}

public String doPost(String username,String password){
try {
url = new URL(urlAddress);
uRLConnection = (HttpURLConnection)url.openConnection();
uRLConnection.setDoInput(true);
uRLConnection.setDoOutput(true);
uRLConnection.setRequestMethod("POST");
uRLConnection.setUseCaches(false);
uRLConnection.setInstanceFollowRedirects(false);
uRLConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
uRLConnection.connect();

DataOutputStream out = new DataOutputStream(uRLConnection.getOutputStream());
String content = "username="+username+"&password="+password;
out.writeBytes(content);
out.flush();
out.close();

InputStream is = uRLConnection.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
String response = "";
String readLine = null;
while((readLine =br.readLine()) != null){
//response = br.readLine();
response = response + readLine;
}
is.close();
br.close();
uRLConnection.disconnect();
return response;
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}

}

}

UserManager.java
package com.bao;

public class UserManager {
UrlConnectionToServer urlConnectionToServer = new UrlConnectionToServer();

HttpClientToServer httpClientToServer = new HttpClientToServer();

public boolean isRightUser(String username,String password){

String response = httpClientToServer.doPost(username, password);
if("true".equals(response)){
return true;
}else{
return false;
}

}

}



main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView android:gravity="center"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="用户登陆"/>
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView android:gravity="right"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="用户名："/>
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/username"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView android:gravity="right"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="密码："/>
<EditText android:password="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/password"/>
</LinearLayout>
<LinearLayout android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<Button android:layout_marginLeft="160px"
android:id="@+id/login"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="登陆"/>
<Button android:id="@+id/reset"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:text="重置"/>
</LinearLayout>

</LinearLayout>