android怎么实现注册登录程序

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注册页面：

user_register.xml：

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处理注册页面的Activity：

package com.example.foreveross.office; import java.io.IOException;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.NameValuePair;import org.apache.http.ParseException;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 com.example.wenandroid.R;import android.app.Activity;import android.os.Bundle;import android.os.StrictMode;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnFocusChangeListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast; public class UserRegister extends Activity { private EditText register_username;private EditText register_passwd;private EditText reregister_passwd;private Button register_submit;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();        StrictMode.setThreadPolicy(policy);        setContentView(R.layout.user_register);        register_username=(EditText)findViewById(R.id.register_username);        register_passwd=(EditText)findViewById(R.id.register_passwd);        reregister_passwd=(EditText)findViewById(R.id.reregister_passwd);        register_submit=(Button)findViewById(R.id.register_submit);        register_username.setOnFocusChangeListener(new OnFocusChangeListener()        {             @Override            public void onFocusChange(View v, boolean hasFocus) {                // TODO Auto-generated method stub                if(!hasFocus){                    if(register_username.getText().toString().trim().length()<4){                        Toast.makeText(UserRegister.this, "用户名不能小于4个字符", Toast.LENGTH_SHORT).show();                    }                }            }                    });        register_passwd.setOnFocusChangeListener(new OnFocusChangeListener()        {             @Override            public void onFocusChange(View v, boolean hasFocus) {                // TODO Auto-generated method stub                if(!hasFocus){                    if(register_passwd.getText().toString().trim().length()<6){                        Toast.makeText(UserRegister.this, "密码不能小于8个字符", Toast.LENGTH_SHORT).show();                    }                }            }                    });        reregister_passwd.setOnFocusChangeListener(new OnFocusChangeListener()        {             @Override            public void onFocusChange(View v, boolean hasFocus) {                // TODO Auto-generated method stub                if(!hasFocus){                    if(!reregister_passwd.getText().toString().trim().equals(register_passwd.getText().toString().trim())){                        Toast.makeText(UserRegister.this, "两次密码输入不一致", Toast.LENGTH_SHORT).show();                     }                }            }                    });        register_submit.setOnClickListener(new OnClickListener(){             @Override            public void onClick(View v) {                                if(!checkEdit()){                    return;                }                // TODO Auto-generated method stub                String httpUrl="http://192.168.1.100:8080/web-test/register.jsp";                HttpPost httpRequest=new HttpPost(httpUrl);                List params=new ArrayList();                params.add(new BasicNameValuePair("username",register_username.getText().toString().trim()));                params.add(new BasicNameValuePair("password",register_passwd.getText().toString().trim()));                HttpEntity httpentity = null;                try {                    httpentity = new UrlEncodedFormEntity(params,"utf8");                } catch (UnsupportedEncodingException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }                httpRequest.setEntity(httpentity);                HttpClient httpclient=new DefaultHttpClient();                HttpResponse httpResponse = null;                try {                    httpResponse = httpclient.execute(httpRequest);                } catch (ClientProtocolException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }                if(httpResponse.getStatusLine().getStatusCode()==200)                {                    String strResult = null;                    try {                        strResult = EntityUtils.toString(httpResponse.getEntity());                    } catch (ParseException e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                    } catch (IOException e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                    }                    Toast.makeText(UserRegister.this, strResult, Toast.LENGTH_SHORT).show();                }                else                {                    Toast.makeText(UserRegister.this, "请求错误", Toast.LENGTH_SHORT).show();                }                            }                    });    }        private boolean checkEdit(){        if(register_username.getText().toString().trim().equals("")){            Toast.makeText(UserRegister.this, "用户名不能为空", Toast.LENGTH_SHORT).show();        }else if(register_passwd.getText().toString().trim().equals("")){            Toast.makeText(UserRegister.this, "密码不能为空", Toast.LENGTH_SHORT).show();        }else if(!register_passwd.getText().toString().trim().equals(reregister_passwd.getText().toString().trim())){            Toast.makeText(UserRegister.this, "两次密码输入不一致", Toast.LENGTH_SHORT).show();        }else{            return true;        }        return false;    }    }

登录页面：

user_login.xml：

                                                                                                            "                                                                               

登录页面Activity：

package com.example.foreveross.office; import java.io.IOException;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.NameValuePair;import org.apache.http.ParseException;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 com.example.wenandroid.R;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.os.StrictMode;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnFocusChangeListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast; public class UserLogin extends Activity implements OnClickListener {private EditText login_username;private EditText login_password;private Button user_login_button;private Button user_register_button;     @Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();    StrictMode.setThreadPolicy(policy);    setContentView(R.layout.user_login);    initWidget(); }    private void initWidget()    {        login_username=(EditText)findViewById(R.id.login_username);        login_password=(EditText)findViewById(R.id.login_password);        user_login_button=(Button)findViewById(R.id.user_login_button);        user_register_button=(Button)findViewById(R.id.user_register_button);        user_login_button.setOnClickListener(this);        user_register_button.setOnClickListener(this);        login_username.setOnFocusChangeListener(new OnFocusChangeListener()        {             @Override            public void onFocusChange(View v, boolean hasFocus) {                // TODO Auto-generated method stub                if(!hasFocus){                    String username=login_username.getText().toString().trim();                    if(username.length()<4){                        Toast.makeText(UserLogin.this, "用户名不能小于4个字符", Toast.LENGTH_SHORT);                    }                }            }                    });        login_password.setOnFocusChangeListener(new OnFocusChangeListener()        {             @Override            public void onFocusChange(View v, boolean hasFocus) {                // TODO Auto-generated method stub                if(!hasFocus){                    String password=login_password.getText().toString().trim();                    if(password.length()<4){                        Toast.makeText(UserLogin.this, "密码不能小于4个字符", Toast.LENGTH_SHORT);                    }                }            }                    });    }         @Override    public void onClick(View v) {        // TODO Auto-generated method stub        switch(v.getId())        {        case R.id.user_login_button:            if(checkEdit())            {                login();            }                        break;        case R.id.user_register_button:            Intent intent2=new Intent(UserLogin.this,UserRegister.class);            startActivity(intent2);            break;        }    }        private boolean checkEdit(){        if(login_username.getText().toString().trim().equals("")){            Toast.makeText(UserLogin.this, "用户名不能为空", Toast.LENGTH_SHORT).show();        }else if(login_password.getText().toString().trim().equals("")){            Toast.makeText(UserLogin.this, "密码不能为空", Toast.LENGTH_SHORT).show();        }else{            return true;        }        return false;    }        private void login(){        String httpUrl="http://192.168.1.102:8080/web-test/login.jsp";        HttpPost httpRequest=new HttpPost(httpUrl);        List params=new ArrayList();        params.add(new BasicNameValuePair("username",login_username.getText().toString().trim()));        params.add(new BasicNameValuePair("password",login_password.getText().toString().trim()));        HttpEntity httpentity = null;        try {            httpentity = new UrlEncodedFormEntity(params,"utf8");        } catch (UnsupportedEncodingException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        httpRequest.setEntity(httpentity);        HttpClient httpclient=new DefaultHttpClient();        HttpResponse httpResponse = null;        try {            httpResponse = httpclient.execute(httpRequest);        } catch (ClientProtocolException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        if(httpResponse.getStatusLine().getStatusCode()==200)        {            String strResult = null;            try {                strResult = EntityUtils.toString(httpResponse.getEntity());            } catch (ParseException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }            Toast.makeText(UserLogin.this, strResult, Toast.LENGTH_SHORT).show();            Intent intent=new Intent(UserLogin.this,IndexActivity.class);            startActivity(intent);        }        else        {            Toast.makeText(UserLogin.this, "登录失败！", Toast.LENGTH_SHORT).show();        }            }}

登录成功则跳转到IndexActivity.java

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