android -簡單註冊登入頁面應用
小白今天寫了一段註冊登入程式碼與大家分享不足請指出
首先寫一個javabean
package com.my.domain;
public class User {private String account;//賬號
private String password;//密碼
public String getAccount() {
return account;
}
public void setAccount(String account) {
this.account = account;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String toString() {
return "account=" + account + ", password=" + password ;
}
public User(){
super();
}
public User(String account ,String password){
super();
this.account=account;
this.password=password;
}
}
寫一個dao層
package com.my.db.service;
import com.my.domain.User;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
/**
*
*登入使用者資料的操作
*
*/
public class UserService {
private DBOpenHelper helper;// 建立DBOpenHelper物件
private SQLiteDatabase db;// 建立SQLiteDatabase物件
public UserService(Context cxt){
helper=new DBOpenHelper(cxt);// 初始化DBOpenHelper物件
}
//登入用
public boolean login(String account,String psw){
db=helper.getReadableDatabase();
String sql1="select account,password from user where account=? and password=?";
Cursor cursor=db.rawQuery(sql1, new String[]{account,psw});
if(cursor.moveToFirst()==true){
cursor.close();
return true;
}
return false;
}
//註冊用
public boolean register(User user){
db=helper.getWritableDatabase();
String sql= "insert into user(account,password) values(?,?)";
Object obj[]={user.getAccount().toString(),user.getPassword().toString()};
db.execSQL(sql, obj);
return true;
}
//檢查使用者名稱是否存在
public boolean checkAccount(String account){
db=helper.getReadableDatabase();
String query="select * from user where account=? ";
Cursor cursor=db.rawQuery(query, new String[]{account});
if(cursor.moveToNext()){
cursor.close();
return true;
}
cursor.close();
return false;
}
}
註冊頁面
package com.activity;
import com.my.db.service.DBOpenHelper;
import com.my.db.service.UserService;
import com.my.domain.User;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
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;
/**
*
* @author 註冊頁面
*
*/
public class Register extends Activity {
public EditText enter_account, enter_psw, confirm_psw;
public String psw1;
public String psw2;
public String account;
UserService uService = new UserService(this);
User user = new User();
protected void onCreate(Bundle saBundle) {
super.onCreate(saBundle);
setContentView(R.layout.register);
// 獲取輸入賬號id
enter_account = (EditText) findViewById(R.id.register_enter_account);
// 獲取輸入密碼id
enter_psw = (EditText) findViewById(R.id.register_enter_psw);
// 獲取確認密碼id
confirm_psw = (EditText) findViewById(R.id.register_confirm_psw);
// 獲取註冊按鈕
Button sign_up = (Button) findViewById(R.id.sign_up);
// 新增事件
sign_up.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
account = enter_account.getText().toString().trim();
psw1 = enter_psw.getText().toString().trim();
psw2 = confirm_psw.getText().toString().trim();
// 輸入賬號或者密碼為空時候不能登入
if ("".equals(account) || "".equals(psw1)) {
new AlertDialog.Builder(Register.this).setTitle("錯誤").setMessage("帳號或密碼不能空")
.setPositiveButton("確定", null).show();
}
// 判斷輸入賬號是否存在
else if (uService.checkAccount(account)) {
Toast.makeText(Register.this, "該使用者名稱已被註冊", Toast.LENGTH_SHORT).show();
enter_account.setText("");
}
// 如果兩次輸入密碼一樣就插入資料，
else if (psw1.equals(psw2)) {
user.setAccount(account);
user.setPassword(psw1);
uService.register(user);
Toast.makeText(Register.this, "註冊成功", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Register.this, Login.class);
startActivity(intent);
} else {
Toast.makeText(Register.this, "註冊失敗，兩次輸入密碼不一樣", Toast.LENGTH_SHORT).show();
enter_psw.setText("");
confirm_psw.setText("");
}
}
});
// 獲取重置按鈕並且新增事件
Button cz = (Button) findViewById(R.id.cz);
cz.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
enter_account.setText("");
enter_psw.setText("");
confirm_psw.setText("");
}
});
}
}
登入頁面
package com.activity;
import com.my.db.service.UserService;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.os.Build;
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;
/**
* 、
*
* @author登入頁面
*
*/
public class Login extends Activity {
public EditText login_edit_account, login_edit_pwd;
public String edit_account;
public String edit_pwd;
UserService uService = new UserService(Login.this);
protected void onCreate(Bundle saBundle) {
super.onCreate(saBundle);
setContentView(R.layout.login);
// 獲取註冊按鈕併為其新增事件
Button register = (Button) findViewById(R.id.register);
register.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// 點選按鈕 new一個意圖 開啟註冊頁面
Intent intent1 = new Intent(Login.this, Register.class);
startActivity(intent1);
}
});
login_edit_account = (EditText) findViewById(R.id.login_edit_account);
login_edit_pwd = (EditText) findViewById(R.id.login_edit_pwd);
// 獲取登入按鈕併為其繫結事件
Button login = (Button) findViewById(R.id.login);
login.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
edit_account = login_edit_account.getText().toString().trim();
edit_pwd = login_edit_pwd.getText().toString().trim();
//判斷輸入賬號或者密碼是否為空
if (edit_account.equals("") || edit_pwd.equals("")) {
new AlertDialog.Builder(Login.this).setTitle("錯誤").setMessage("賬號或密碼不能為空")
.setPositiveButton("確定", null).show();
}
// 對輸入的值進行判斷，呼叫UserService login函式
else if (uService.login(edit_account, edit_pwd)) {
Toast.makeText(Login.this, "登入成功", Toast.LENGTH_SHORT).show();
Intent intent2 = new Intent(Login.this, MainActivity.class);
startActivity(intent2);
} else {
Toast.makeText(Login.this, "登入失敗，輸入賬號或者密碼錯誤，請重新輸入！", Toast.LENGTH_SHORT).show();
login_edit_account.setText("");
login_edit_pwd.setText("");
}
}
});
}
}
login.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@drawable/login_bj"
>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingBottom="10px"
android:paddingTop="150px" >
<!-- 登入左邊logo -->
<ImageView
android:id="@+id/faceImg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/dl_2" />
<EditText
android:id="@+id/login_edit_account"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/faceImg"
android:hint="輸入帳號"
android:paddingLeft="45sp"
android:textColor="#ff0000" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/login_edit_account"
android:layout_alignLeft="@+id/login_edit_account"
android:layout_alignTop="@+id/login_edit_account"
android:layout_marginRight="15sp"
android:gravity="center_vertical"
android:paddingLeft="7sp"
android:text="帳號:"
android:textSize="10dp" />
<EditText
android:id="@+id/login_edit_pwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/login_edit_account"
android:layout_alignRight="@+id/login_edit_account"
android:layout_below="@+id/login_edit_account"
android:hint="輸入密碼"
android:paddingLeft="45sp"
android:inputType="textPassword"
android:textColor="#ff0000" />
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/login_edit_pwd"
android:layout_alignLeft="@+id/login_edit_pwd"
android:layout_alignTop="@+id/login_edit_pwd"
android:layout_marginRight="15.0sp"
android:gravity="center_vertical"
android:paddingLeft="7sp"
android:text="密碼:"
android:textSize="10dp"
/>
<Button
android:id="@+id/register"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_below="@+id/login_edit_pwd"
android:layout_alignLeft="@+id/login_edit_pwd"
android:text="注 冊"
android:textColor="#FF0000" />
<Button
android:id="@+id/login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/login_edit_pwd"
android:layout_toRightOf="@id/register"
android:text="登 錄"
android:textColor="#FF0000" />
</RelativeLayout>
</LinearLayout>
register.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- 使用者註冊頁面 -->
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/tablayout1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/login_bj" >
<ImageView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:src="@drawable/sign1" />
<TableRow
android:id="@+id/tablerow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="賬 號:"
android:textSize="15sp" />
<EditText
android:id="@+id/register_enter_account"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="3"
android:hint="請輸入賬號"
android:singleLine="true" />
</TableRow>
<TableRow
android:id="@+id/tablerow2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="密 碼:"
android:textSize="15sp" />
<EditText
android:id="@+id/register_enter_psw"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="3"
android:hint="請輸入密碼"
android:inputType="textPassword"
android:singleLine="true" />
</TableRow>
<TableRow
android:id="@+id/tablerow3"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="確認密碼:"
android:textSize="15sp" />
<EditText
android:id="@+id/register_confirm_psw"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="3"
android:hint="請確認密碼"
android:inputType="textPassword"
android:singleLine="true" />
</TableRow>
<TableRow
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<Button
android:id="@+id/sign_up"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_weight="1"
android:text="注 冊"
android:textColor="#FF0000" />
<Button
android:id="@+id/cz"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="重 置"
android:textColor="#FF0000" />
</TableRow>
</TableLayout>
效果圖