AndroidStudio实现简易android登录注册修改密码页面。_Funny potato_android studio登陆注册

大大的周 02-07 4373

利用sqlite实现简易登录注册以及修改密码功能。

页面设计登录页面activity_login.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#0BD1EA" android:orientation="vertical"> <RelativeLayout android:id="@+id/rtLytTop" android:layout_width="match_parent" android:layout_height="100dp" android:layout_margin="30dp" > </RelativeLayout> <RelativeLayout android:id="@+id/rtLytMiddle" android:layout_width="match_parent" android:layout_height="50dp" android:layout_below="@+id/rtLytTop" android:layout_marginLeft="30dp" android:layout_marginTop="1dp" android:layout_marginRight="30dp" > <EditText android:id="@+id/edt_UserName" android:layout_width="match_parent" android:layout_height="50dp" android:layout_marginLeft="10dp" android:background="@drawable/editext_shape" android:hint="请输入用户名" android:inputType="text"> </EditText> </RelativeLayout> <LinearLayout android:id="@+id/rtLyMiddle" android:layout_width="match_parent" android:layout_height="50dp" android:layout_below="@+id/rtLytMiddle" android:layout_marginLeft="30dp" android:layout_marginTop="20dp" android:layout_marginRight="30dp" android:orientation="horizontal"> <EditText android:id="@+id/edt_Password" android:layout_width="match_parent" android:layout_height="50dp" android:layout_marginLeft="10dp" android:background="@drawable/editext_shape" android:hint="请输入密码" android:inputType="textPassword"> </EditText> </LinearLayout> <Button android:id="@+id/btn_Login" android:layout_width="match_parent" android:layout_height="50dp" android:layout_below="@+id/rtLyMiddle" android:layout_margin="70dp" android:text="登录" android:background="@drawable/button_shape" android:textColor="#ffffff" android:textSize="24sp"> </Button> <RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true"> <Button android:id="@+id/btn_Forget" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="#0BD1EA" android:paddingLeft="10dp" android:paddingBottom="10dp" android:text="忘记密码？"> </Button> <Button android:id="@+id/btn_Register" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:background="#0BD1EA" android:paddingRight="10dp" android:paddingBottom="10dp" android:text="新用户"> </Button> </RelativeLayout> </RelativeLayout>

界面截图注册界面 activity_register.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:background="#0BD1EA" android:orientation="vertical"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="用户注册" android:textSize="30sp" android:gravity="center"> </TextView> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> <TextView android:layout_width="120dp" android:layout_height="50dp" android:text="用户名:" android:textSize="24sp"></TextView> <EditText android:id="@+id/edt_UserName" android:layout_width="300dp" android:layout_height="50dp" android:layout_marginLeft="10dp" android:hint="请输入用户名" android:inputType="text"></EditText> </LinearLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> <TextView android:layout_width="120dp" android:layout_height="50dp" android:text="密码:" android:textSize="24sp"></TextView> <EditText android:id="@+id/edt_Password" android:layout_width="300dp" android:layout_height="50dp" android:layout_marginLeft="10dp" android:hint="请输入密码(6-12位)" android:inputType="textPassword" android:maxLength="12"></EditText> </LinearLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> <TextView android:layout_width="120dp" android:layout_height="50dp" android:text="确认密码:" android:textSize="24sp"></TextView> <EditText android:id="@+id/edt_Password2" android:layout_width="300dp" android:layout_height="50dp" android:layout_marginLeft="10dp" android:hint="请确认密码(6-12位)" android:inputType="textPassword"></EditText> </LinearLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> <TextView android:layout_width="120dp" android:layout_height="50dp" android:text="手机号:" android:textSize="24sp"></TextView> <EditText android:id="@+id/edt_Phone" android:layout_width="300dp" android:layout_height="50dp" android:layout_marginLeft="10dp" android:hint="请输入手机号" android:inputType="number" android:maxLength="12"></EditText> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> <TextView android:id="@+id/Sex" android:layout_width="120dp" android:layout_height="50dp" android:text="性别:" android:textSize="24sp"></TextView> <RadioGroup android:id="@+id/rdg_Sex" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="30dp" android:orientation="horizontal"> <RadioButton android:id="@+id/rb_Man" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="男" /> <RadioButton android:id="@+id/rb_Woman" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="60dp" android:text="女" /> </RadioGroup> </LinearLayout> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> <TextView android:layout_width="120dp" android:layout_height="50dp" android:text="出生地:" android:textSize="24sp" /> <TextView android:layout_width="50dp" android:layout_height="50dp" android:text="省份:" android:textSize="18dp" /> <Spinner android:id="@+id/sp_Provinces" android:layout_width="100dp" android:layout_height="wrap_content"></Spinner> <TextView android:layout_width="50dp" android:layout_height="50dp" android:text="城市:" android:textSize="18dp" /> <Spinner android:id="@+id/sp_Cities" android:layout_width="100dp" android:layout_height="wrap_content"></Spinner> </LinearLayout> <Button android:id="@+id/btn_Register" android:layout_width="match_parent" android:layout_height="50dp" android:layout_margin="70dp" android:text="确认注册" android:background="@drawable/button_shape" android:textColor="#ffffff" android:textSize="24sp"></Button> </LinearLayout>

界面截图修改密码界面 activity_forget_password.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:background="#0BD1EA" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" > <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="修改密码" android:textSize="30sp" android:gravity="center"></TextView> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <TextView android:layout_width="132dp" android:layout_height="wrap_content" android:text="账号:" android:textSize="24sp" android:layout_marginLeft="10dp"> </TextView> <EditText android:id="@+id/edt_UserName" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入用户名" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> </EditText> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <TextView android:layout_width="132dp" android:layout_height="wrap_content" android:text="手机号:" android:textSize="24sp" android:layout_marginLeft="10dp"> </TextView> <EditText android:id="@+id/edt_Phone" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入注册的手机号" android:inputType="number" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> </EditText> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <TextView android:layout_width="132dp" android:layout_height="wrap_content" android:text="新密码:" android:textSize="24sp" android:layout_marginLeft="10dp"> </TextView> <EditText android:id="@+id/edt_NewPassWord" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入新密码" android:inputType="textPassword" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> </EditText> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <TextView android:layout_width="132dp" android:layout_height="wrap_content" android:text="确认新密码:" android:textSize="24sp" android:layout_marginLeft="10dp"> </TextView> <EditText android:id="@+id/edt_NewPassWord2" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请再次输入新密码" android:inputType="textPassword" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"> </EditText> </LinearLayout> <Button android:id="@+id/btn_Confirm" android:layout_width="match_parent" android:layout_height="50dp" android:layout_margin="70dp" android:text="确认修改" android:background="@drawable/button_shape" android:textColor="#ffffff" android:textSize="24sp"> </Button> </LinearLayout>

界面截图这几个界面的按钮都进行的圆角的设计，可参考 button_shape.xml

<?xml version="1.0" encoding="utf-8"?> <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle"> <solid android:color="#5668CA"></solid> <corners android:radius="25dp"> </corners> </shape>

这些背景颜色什么的可以根据自己需要进行设计哈，然后将其放在drawable文件夹下，需要用到的时候直接调用就可以了。尽量规范命名哈。功能实现登录功能实现，Login.java

/** * 账号密码登录 */ public class Login extends AppCompatActivity { private EditText edt_Username, edt_PassWord; private Button btn_Login, btn_Forget, btn_Register; boolean isFlag = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_login); edt_Username = this.findViewById(R.id.edt_UserName); edt_PassWord = this.findViewById(R.id.edt_Password); btn_Login = this.findViewById(R.id.btn_Login); btn_Forget = this.findViewById(R.id.btn_Forget); btn_Register = this.findViewById(R.id.btn_Register); //用户名 edt_Username.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { //当点击用户名输入框时，清空密码框 edt_PassWord.setText(""); } else { String username = edt_Username.getText().toString(); if (username.length() < 4) { Toast.makeText(Login.this, "用户名长度必须大于4,请重新输入", Toast.LENGTH_SHORT).show(); edt_Username.setText(""); } } } }); //密码框 edt_PassWord.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { } else { String password = edt_PassWord.getText().toString(); if (password.length() < 6 || password.length() > 12) { Toast.makeText(Login.this, "密码长度必须为6-12位,请重新输入", Toast.LENGTH_LONG).show(); edt_PassWord.setText(""); } } } }); //打开数据库 SQLiteDatabase database = openOrCreateDatabase("user.db", MODE_PRIVATE, null); //若不存在user表，则创建user表 String createSQL = "create table IF NOT EXISTS user(username text,password text,password2 text,phone text)"; database.execSQL(createSQL);//执行创表语句 //登录事件监听 btn_Login.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { isFlag = false; String username = edt_Username.getText().toString(); String password = edt_PassWord.getText().toString(); //判断输入是否为空，若为空，给出提示 if (username.equals("") || password.equals("")) { Toast.makeText(Login.this, "请输入账号或密码！", Toast.LENGTH_SHORT).show(); isFlag = true; } //查询账号密码，若数据库表为空，提示用户注册 Cursor cursor = database.query("user", new String[]{"username,password"}, null, null, null, null, null); if (cursor.getCount() == 0) { Toast.makeText(Login.this, "请先注册账号！", Toast.LENGTH_SHORT).show(); isFlag=true; } //若数据库表不为空，查看用户输入的账号密码是否与数据库表中的相匹配，若匹配，登录成功，跳转到主界面 // 否则无法登录，给出账号密码错误提示 else { while (cursor.moveToNext()) { if (username.equals(cursor.getString(cursor.getColumnIndex("username"))) && password.equals(cursor.getString(cursor.getColumnIndex("password")))) { Toast.makeText(Login.this, "登录成功", Toast.LENGTH_SHORT).show(); Intent intent = new Intent(Login.this, MainActivity.class); startActivity(intent); isFlag = true; break; } } if (isFlag == false) { Toast.makeText(Login.this, "账号或密码错误，请重新输入", Toast.LENGTH_SHORT).show(); } } } }); //修改密码监听事件，点击忘记密码，跳转到修改密码界面 btn_Forget.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(Login.this, Forget_Password.class); startActivity(intent); } }); //注册监听事件，点击新用户，跳转到注册界面 btn_Register.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(Login.this, Register.class); startActivity(intent); } }); } }

利用数据库查询账号是都存在，以及账号密码是否匹配验证，否则是登录不成功的，若没有账号就先注册账号。注册账号功能 Register.java

/** * 用户注册 */ public class Register extends AppCompatActivity { private Spinner sp_Provinces; private Spinner sp_Cities; private RadioGroup rdg_Sex; private RadioButton rb_Man, rb_Woman; private Button btn_Register; private EditText edt_UserName, edt_Password, edt_Password2, edt_Phone; private boolean isFlag = true; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_register); //用户名及密码 edt_UserName = this.findViewById(R.id.edt_UserName); edt_Password = this.findViewById(R.id.edt_Password); edt_Password2 = this.findViewById(R.id.edt_Password2); //手机号 edt_Phone = this.findViewById(R.id.edt_Phone); //出生地 sp_Provinces = this.findViewById(R.id.sp_Provinces); sp_Cities = this.findViewById(R.id.sp_Cities); //性别选择 rdg_Sex = this.findViewById(R.id.rdg_Sex); rb_Man = this.findViewById(R.id.rb_Man); rb_Woman = this.findViewById(R.id.rb_Woman); //确认注册按钮 btn_Register = this.findViewById(R.id.btn_Register); //用户名输入框失焦处理 edt_UserName.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { isFlag = true; } else { isFlag = true; String username = edt_UserName.getText().toString(); if (username.length() < 4) { Toast.makeText(Register.this, "用户名长度必须大于4,请重新输入", Toast.LENGTH_SHORT).show(); edt_UserName.setText(""); } } } }); //密码输入框失焦处理 edt_Password.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { isFlag=true; } else { isFlag = true; String password = edt_Password.getText().toString(); if (password.length() < 6 || password.length() > 12) { Toast.makeText(Register.this, "密码长度必须为6-12位,请重新输入", Toast.LENGTH_LONG).show(); edt_Password.setText(""); } } } }); //确认密码输入框失焦处理 edt_Password2.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { isFlag=true; } else { isFlag = true; String password = edt_Password.getText().toString(); String password2 = edt_Password2.getText().toString(); if (!(password.equals(password2))) { Toast.makeText(Register.this, "两次密码不一致,请重新输入", Toast.LENGTH_SHORT).show(); edt_Password2.setText(""); } else if (password2.length() < 6 || password2.length() > 12) { Toast.makeText(Register.this, "密码长度必须为6-12位", Toast.LENGTH_LONG).show(); edt_Password2.setText(""); } } } }); //手机号 edt_Phone.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { isFlag=true; } else { isFlag = true; String phone = edt_Phone.getText().toString(); if (!(phone.length() == 11)) { Toast.makeText(Register.this, "请输入11位手机号", Toast.LENGTH_SHORT).show(); edt_Phone.setText(""); } } } }); //性别处理 rdg_Sex.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup group, int checkedId) { switch (checkedId) { case R.id.rb_Man: Toast.makeText(Register.this, "男", Toast.LENGTH_LONG).show(); break; case R.id.rb_Woman: Toast.makeText(Register.this, "女", Toast.LENGTH_LONG).show(); break; } } }); //出生地处理 ArrayAdapter adapter = ArrayAdapter.createFromResource(Register.this, R.array.provinces, android.R.layout.simple_spinner_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_item); sp_Provinces.setAdapter(adapter); sp_Provinces.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override//省市联动 public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { if (position == 0) { ArrayAdapter cityAdapter = ArrayAdapter.createFromResource(Register.this, R.array.yunnan, android.R.layout.simple_spinner_item); sp_Cities.setAdapter(cityAdapter); } else if (position == 1) { ArrayAdapter cityAdapter = ArrayAdapter.createFromResource(Register.this, R.array.shanxi, android.R.layout.simple_spinner_item); sp_Cities.setAdapter(cityAdapter); } else if (position == 2) { ArrayAdapter cityAdapter = ArrayAdapter.createFromResource(Register.this, R.array.fj, android.R.layout.simple_spinner_item); sp_Cities.setAdapter(cityAdapter); } else if (position == 3) { ArrayAdapter cityAdapter = ArrayAdapter.createFromResource(Register.this, R.array.guangxi, android.R.layout.simple_spinner_item); sp_Cities.setAdapter(cityAdapter); } else if (position == 4) { ArrayAdapter cityAdapter = ArrayAdapter.createFromResource(Register.this, R.array.guangdong, android.R.layout.simple_spinner_item); sp_Cities.setAdapter(cityAdapter); } else if (position == 5) { ArrayAdapter cityAdapter = ArrayAdapter.createFromResource(Register.this, R.array.guizhou, android.R.layout.simple_spinner_item); sp_Cities.setAdapter(cityAdapter); } } @Override public void onNothingSelected(AdapterView<?> parent) { } }); //打开数据库或创建数据库 SQLiteDatabase database = openOrCreateDatabase("user.db", MODE_PRIVATE, null); String createSQL = "create table IF NOT EXISTS user(username text,password text,password2 text,phone text)"; database.execSQL(createSQL); //确认注册处理 btn_Register.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //获取用户输入信息 String username = edt_UserName.getText().toString(); String password = edt_Password.getText().toString(); String password2 = edt_Password2.getText().toString(); String phone = edt_Phone.getText().toString(); //判断用户输入是否为空，若有一个输入框为空，则给出提示信息 if (username.equals("") || password.equals("") || password2.equals("") || phone.equals("")) { Toast.makeText(Register.this, "请输入完整信息", Toast.LENGTH_SHORT).show(); isFlag = false; } //判断用户是否存在，若已有此账号，则不允许重复注册，否则允许注册 Cursor cursor = database.query("user", new String[]{"username"}, null, null, null, null, null); while (cursor.moveToNext()) { if (username.equals(cursor.getString(cursor.getColumnIndex("username")))) { Toast.makeText(Register.this, "该账户已存在", Toast.LENGTH_SHORT).show(); isFlag = false;// } } if(!password.equals(password2)) { Toast.makeText(Register.this, "两次密码不一致", Toast.LENGTH_SHORT).show(); //若允许注册，则将用户输入的信息，插入到数据库表（user）中,插入成功跳转到登录界面 }else if (!(phone.length() == 11)){ Toast.makeText(Register.this, "请输入11位手机号！", Toast.LENGTH_SHORT).show(); } else if (isFlag ) { ContentValues values = new ContentValues(); //将数据放入values中 values.put("username", username); values.put("password", password); values.put("password2", password2); values.put("phone", phone); //用insert()方法将values中的数据插入到user表中 database.insert("user", null, values); Toast.makeText(Register.this, "注册成功,请登录！", Toast.LENGTH_SHORT).show(); Intent intent = new Intent(Register.this, Login.class); startActivity(intent); database.close(); } } }); } }

用户注册的账号密码保存在数据库中，手机号用作验证功能，不过选择出生地的时候还没有加入数据库的哈，数据库中没有出生地属性，大家可以自行加入。

最后为忘记密码功能 Forget_Password.java

/** * 修改密码 */ public class Forget_Password extends AppCompatActivity { private EditText edt_UserName, edt_Phone, edt_NewPassWord, edt_NewPassWord2; private Button btn_Confirm; private boolean isFlag = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_forget_password); //获取实例对象 edt_UserName = this.findViewById(R.id.edt_UserName); edt_Phone = this.findViewById(R.id.edt_Phone); edt_NewPassWord = this.findViewById(R.id.edt_NewPassWord); edt_NewPassWord2 = this.findViewById(R.id.edt_NewPassWord2); btn_Confirm = this.findViewById(R.id.btn_Confirm); //用户名 edt_UserName.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { } else { String username = edt_UserName.getText().toString(); if (username.length() < 4) { Toast.makeText(Forget_Password.this, "用户名长度必须大于4,请重新输入", Toast.LENGTH_SHORT).show(); edt_UserName.setText(""); } } } }); //手机号，用作用户修改密码验证条件 edt_Phone.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { } else { String phone = edt_Phone.getText().toString(); if (!(phone.length() == 11)) { Toast.makeText(Forget_Password.this, "请输入11位手机号", Toast.LENGTH_SHORT).show(); edt_Phone.setText(""); } } } }); //新密码 edt_NewPassWord.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { } else { String newPassword = edt_NewPassWord.getText().toString(); if (newPassword.length() < 6 || newPassword.length() > 12) { Toast.makeText(Forget_Password.this, "密码长度必须为6-12位,请重新输入", Toast.LENGTH_LONG).show(); edt_NewPassWord.setText(""); } } } }); //确认新密码 edt_NewPassWord2.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { if (hasFocus) { } else { String newPassword = edt_NewPassWord.getText().toString(); String newPassword2 = edt_NewPassWord2.getText().toString(); if (!(newPassword.equals(newPassword2))) { Toast.makeText(Forget_Password.this, "两次密码不一致,请重新输入", Toast.LENGTH_SHORT).show(); edt_NewPassWord2.setText(""); } else if (newPassword2.length() < 6 || newPassword2.length() > 12) { Toast.makeText(Forget_Password.this, "密码长度必须为6-12位", Toast.LENGTH_LONG).show(); edt_NewPassWord2.setText(""); } } } }); //确认修改密码，若用户名与此手机号匹配，则可以修改密码，否则不允许修改密码 SQLiteDatabase database = openOrCreateDatabase("user.db", MODE_PRIVATE, null); btn_Confirm.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String username = edt_UserName.getText().toString(); String password = edt_NewPassWord.getText().toString(); String password2 = edt_NewPassWord2.getText().toString(); String phone = edt_Phone.getText().toString(); //判断用户输入是否为空，若有一个输入框为空，则给出提示信息 if (username.equals("") || password.equals("") || password2.equals("") || phone.equals("")) { Toast.makeText(Forget_Password.this, "请输入完整信息", Toast.LENGTH_SHORT).show(); }else if (!(password.equals(password2))){ Toast.makeText(Forget_Password.this, "两次密码不一致", Toast.LENGTH_SHORT).show(); }else { Cursor cursor = database.query("user", new String[]{"username,phone"}, null, null, null, null, null); while (cursor.moveToNext()) { //判断用户名和手机号是否匹配 //首先利用查询语句，查询username和phone，若手机号和用户名匹配，则允许修改密码。 if ((username.equals(cursor.getString(cursor.getColumnIndex("username"))) && phone.equals(cursor.getString(cursor.getColumnIndex("phone"))))) { ContentValues values = new ContentValues(); //将数据放入values中 String Username = edt_UserName.getText().toString(); values.put("password", password); values.put("password2", password2); //用update()方法将values中的数据更新对应的用户名密码 database.update("user", values, "username=?", new String[]{username}); Toast.makeText(Forget_Password.this, "修改密码成功,请登录！", Toast.LENGTH_SHORT).show(); Intent intent = new Intent(Forget_Password.this, Login.class); isFlag = true; startActivity(intent); database.close(); break; } isFlag = false; } } if (isFlag == false) { Toast.makeText(Forget_Password.this, "用户名与手机号不匹配，修改失败", Toast.LENGTH_SHORT).show(); } } }); } }

手机号为用户注册时的手机号，暂时用手机号作为验证功能，用户的账号和手机号与数据库的匹配就允许修改密码。地名资源文件放在res文件夹的values的string.xml文件

<resources> <string name="app_name">Words</string> <string-array name="provinces"> <item>云南省</item> <item>山西省</item> <item>福建省</item> <item>广西壮族自治区</item> <item>广东省</item> <item>贵州省</item> </string-array> <string-array name="yunnan"> <item>昆明市</item> <item>曲靖市</item> <item>玉溪市</item> <item>昭通市</item> <item>保山市</item> <item>丽江市</item> </string-array> <string-array name="guangxi"> <item>南宁市</item> <item>桂林市</item> <item>柳州市</item> <item>北海市</item> <item>钦州市</item> <item>玉林市</item> <item>百色市</item> <item>河池市</item> <item>防城港市</item> </string-array> <string-array name="shanxi"> <item>大同市</item> <item>临汾市</item> <item>太原市</item> <item>阳泉市</item> <item>长治市</item> <item>晋城市</item> <item>朔州市</item> <item>晋中市</item> <item>运城市</item> </string-array> <string-array name="fj"> <item>福州市</item> <item>厦门市</item> <item>泉州市</item> <item>漳州市</item> <item>福清市</item> <item>莆田市</item> <item>宁德市</item> </string-array> <string-array name="guangdong"> <item>广州市</item> <item>深圳市</item> <item>中山市</item> <item>佛山市</item> <item>惠州市</item> <item>珠海市</item> <item>汕头市</item> </string-array> <string-array name="guizhou"> <item>贵阳市</item> <item>遵义市</item> <item>安顺市</item> <item>毕节市</item> <item>铜仁市</item> <item>六盘水市</item> </string-array> </resources>

大家有什么问题以及建议欢迎讨论留言。