此文章为SharedPreferences数据存储持久化技术用户账号注册登录修改综合应用完整程序代码，关于SharedPreferences相关内容请见SharedPreferences数据存储持久化技术博客文章。
一、用户登陆
xml布局：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/f12webp"
xmlns:app="http://schemas.android.com/apk/res-auto">
<EditText
android:id="@+id/pwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="textPassword"
android:hint="密码:"
app:layout_constraintTop_toBottomOf="@+id/name"
app:layout_constraintStart_toStartOf="@+id/name"
android:layout_marginTop="50dp"
tools:layout_editor_absoluteX="100dp"
tools:layout_editor_absoluteY="267dp" />
<EditText
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="text"
android:hint="账号:"
app:layout_constraintTop_toBottomOf="@+id/textView"
app:layout_constraintStart_toStartOf="@+id/textView"
android:layout_marginTop="60dp"
tools:layout_editor_absoluteX="97dp"
tools:layout_editor_absoluteY="154dp" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="用户登录"
android:textSize="52dp"
app:layout_constraintStart_toStartOf="parent"
android:gravity="center"
android:layout_marginStart="90dp"
app:layout_constraintTop_toTopOf="parent"
tools:layout_editor_absoluteX="88dp" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="登录"
app:layout_constraintTop_toBottomOf="@+id/pwd"
app:layout_constraintStart_toStartOf="@+id/pwd"
android:layout_marginTop="60dp"
android:layout_marginStart="59dp"
tools:layout_editor_absoluteX="149dp"
tools:layout_editor_absoluteY="374dp" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="注册"
app:layout_constraintStart_toStartOf="@+id/button"
app:layout_constraintTop_toBottomOf="@+id/button"
android:layout_marginTop="20dp"
/>
<TextView
android:id="@+id/wj"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="————忘记密码————"
android:textColor="#55CD5B"
app:layout_constraintEnd_toEndOf="@+id/button2"
app:layout_constraintStart_toStartOf="@+id/button2"
app:layout_constraintTop_toBottomOf="@+id/button2" />
<TextView
android:id="@+id/zx"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="————账号注销————"
android:textColor="#E3F1F0"
app:layout_constraintEnd_toEndOf="@+id/wj"
app:layout_constraintStart_toStartOf="@+id/wj"
app:layout_constraintTop_toBottomOf="@+id/wj" />
</androidx.constraintlayout.widget.ConstraintLayout>- 1.
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代码：
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SharedPreferences sp = getSharedPreferences("data",MODE_PRIVATE);
Button button = findViewById(R.id.button);
Button button2 = findViewById(R.id.button2);
EditText name = findViewById(R.id.name);
EditText pwd = findViewById(R.id.pwd);
TextView wj = findViewById(R.id.wj);
TextView zx = findViewById(R.id.zx);
zx.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, MainActivity4.class);
startActivity(intent);
}
});
wj.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, MainActivity3.class);
startActivity(intent);
}
});
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String name1 = name.getText().toString().trim();
String pwd1 = pwd.getText().toString().trim();
String Name = sp.getString("2222","");
if(name1.length()!=0&&pwd1.length()!=0)
{
if (pwd1.equals(Name))
{
Intent intent = new Intent(MainActivity.this, MainActivity2.class);
startActivity(intent);
Toast.makeText(MainActivity.this, "登录成功", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(MainActivity.this, "账号或密码错误", Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(MainActivity.this, "账号或密码不能为空", Toast.LENGTH_SHORT).show();
}
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, MainActivity5.class);
startActivity(intent);
}
});
}
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效果：
二、用户注册
xml布局：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity5"
android:background="@drawable/p6">
<EditText
android:id="@+id/SFZ"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="52dp"
android:ems="10"
android:hint="身份证:"
android:inputType="text"
app:layout_constraintStart_toStartOf="@+id/ZcName"
app:layout_constraintTop_toBottomOf="@+id/ZcName" />
<EditText
android:id="@+id/ZcName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="text"
android:hint="账号:"
app:layout_constraintTop_toBottomOf="@+id/textView"
app:layout_constraintStart_toStartOf="@+id/textView"
android:layout_marginTop="60dp"
tools:layout_editor_absoluteX="97dp"
tools:layout_editor_absoluteY="154dp" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="用户注册"
android:textSize="52dp"
app:layout_constraintStart_toStartOf="parent"
android:gravity="center"
android:layout_marginStart="90dp"
app:layout_constraintTop_toTopOf="parent"
tools:layout_editor_absoluteX="88dp" />
<Button
android:id="@+id/ZcButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="68dp"
android:layout_marginTop="272dp"
android:text="注册"
app:layout_constraintStart_toStartOf="@+id/SFZ"
app:layout_constraintTop_toBottomOf="@+id/SFZ" />
<EditText
android:id="@+id/ZcPwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="52dp"
android:ems="10"
android:hint="密码："
android:inputType="textPassword"
app:layout_constraintStart_toStartOf="@+id/SFZ"
app:layout_constraintTop_toBottomOf="@+id/SFZ" />
<EditText
android:id="@+id/QZcPwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="52dp"
android:ems="10"
android:hint="确认密码："
android:inputType="textPassword"
app:layout_constraintStart_toStartOf="@+id/ZcPwd"
app:layout_constraintTop_toBottomOf="@+id/ZcPwd" />
</androidx.constraintlayout.widget.ConstraintLayout>- 1.
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代码：
public class MainActivity5 extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EdgeToEdge.enable(this);
setContentView(R.layout.activity_main5);
SharedPreferences sp = getSharedPreferences("data",MODE_PRIVATE);
EditText ZcName = findViewById(R.id.ZcName);
EditText SFZ = findViewById(R.id.SFZ);
EditText ZcPwd = findViewById(R.id.ZcPwd);
EditText QZcPwd = findViewById(R.id.QZcPwd);
Button ZcButton = findViewById(R.id.ZcButton);
ZcButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String ZcName_1 = ZcName.getText().toString().trim();
String SFZ_1 = SFZ.getText().toString().trim();
String ZcPwd_1 = ZcPwd.getText().toString().trim();
String QZcPwd_1 = QZcPwd.getText().toString().trim();
Boolean ZcName_C = sp.contains(ZcName_1);
if (ZcName_1.length()!=0&&SFZ_1.length()!=0&&ZcPwd_1.length()!=0) {
if (SFZ_1.length()==18) {
if (ZcPwd_1.length()>=4) {
if (ZcName_C != true) {
if (ZcPwd_1.equals(QZcPwd_1)) {
sp.edit().putString(SFZ_1, ZcName_1).apply();
sp.edit().putString(ZcName_1, QZcPwd_1).apply();
Toast.makeText(MainActivity5.this, "注册成功", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity5.this, "密码不相同", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(MainActivity5.this, "注册失败，账号已存在", Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(MainActivity5.this, "注册失败，密码过于简单", Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(MainActivity5.this, "身份证格式错误", Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(MainActivity5.this, "账号与身份证或密码不能为空", Toast.LENGTH_SHORT).show();
}
}
});
}
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效果：
三、忘记密码
xml布局：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/f2"
tools:context=".MainActivity3">
<EditText
android:id="@+id/XPwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="120dp"
android:ems="10"
android:hint="新密码:"
android:inputType="textPassword"
app:layout_constraintStart_toStartOf="@+id/XName"
app:layout_constraintTop_toBottomOf="@+id/XName" />
<EditText
android:id="@+id/XName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="text"
android:hint="账号:"
app:layout_constraintTop_toBottomOf="@+id/textView"
app:layout_constraintStart_toStartOf="@+id/textView"
android:layout_marginTop="60dp"
tools:layout_editor_absoluteX="97dp"
tools:layout_editor_absoluteY="154dp" />
<EditText
android:id="@+id/XQSFz"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="28dp"
android:ems="10"
android:hint="身份验证："
android:inputType="text"
app:layout_constraintStart_toStartOf="@+id/XName"
app:layout_constraintTop_toBottomOf="@+id/XName">
</EditText>
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="88dp"
android:layout_marginTop="36dp"
android:gravity="center"
android:text="修改密码"
android:textSize="52dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="56dp"
android:layout_marginTop="168dp"
android:text="确认修改"
app:layout_constraintStart_toStartOf="@+id/XPwd"
app:layout_constraintTop_toBottomOf="@+id/XPwd" />
<EditText
android:id="@+id/XGPwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:hint="确认新密码:"
app:layout_constraintTop_toBottomOf="@id/XPwd"
app:layout_constraintStart_toStartOf="@+id/XPwd"
android:layout_marginTop="50dp"
android:inputType="textPassword"
tools:layout_editor_absoluteX="92dp"
tools:layout_editor_absoluteY="357dp" />
</androidx.constraintlayout.widget.ConstraintLayout>- 1.
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代码：
public class MainActivity3 extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EdgeToEdge.enable(this);
setContentView(R.layout.activity_main3);
SharedPreferences sp = getSharedPreferences("data",MODE_PRIVATE);
EditText name = findViewById(R.id.XName);
EditText XSFz = findViewById(R.id.XQSFz);
EditText XPwd = findViewById(R.id.XPwd);
EditText XGPwd = findViewById(R.id.XGPwd);
Button button = findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String name1 = name.getText().toString().trim();
String XSFz1 = XSFz.getText().toString().trim();
String XPwd1 = XPwd.getText().toString().trim();
String XGPwd1 = XGPwd.getText().toString().trim();
String XSFz_B = sp.getString(XSFz1, "");
Boolean Name = sp.contains(name1);
if (name1.length() != 0 && XPwd1.length() != 0 && XSFz1.length() != 0) {
if (name1.equals(XSFz_B)) {
if (XPwd1.length() >= 4) {
if (XPwd1.equals(XGPwd1)) {
if (Name == true) {
Toast.makeText(MainActivity3.this, "密码修改成功", Toast.LENGTH_SHORT).show();
sp.edit().putString(name1, XGPwd1).apply();
} else {
Toast.makeText(MainActivity3.this, "账号不存在", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(MainActivity3.this, "新密码不相同", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(MainActivity3.this, "修改失败，密码过于简单", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(MainActivity3.this, "身份错误", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(MainActivity3.this, "账号与身份验证或新密码不能为空", Toast.LENGTH_SHORT).show();
}
}
});
}
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效果：
四、账号注销
xml布局：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/zx"
tools:context=".MainActivity4">
<EditText
android:id="@+id/ZPwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="168dp"
android:ems="10"
android:hint="密码:"
android:inputType="textPassword"
app:layout_constraintStart_toStartOf="@+id/ZName"
app:layout_constraintTop_toBottomOf="@+id/ZName" />
<EditText
android:id="@+id/ZName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="text"
android:hint="账号:"
app:layout_constraintTop_toBottomOf="@+id/textView"
app:layout_constraintStart_toStartOf="@+id/textView"
android:layout_marginTop="60dp"
tools:layout_editor_absoluteX="97dp"
tools:layout_editor_absoluteY="154dp" />
<EditText
android:id="@+id/ZxSFz"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="52dp"
android:ems="10"
android:hint="身份验证:"
android:inputType="text"
app:layout_constraintStart_toStartOf="@+id/ZName"
app:layout_constraintTop_toBottomOf="@+id/ZName" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="136dp"
android:gravity="center"
android:text="账号注销"
android:textSize="52dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.455"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/ZButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="59dp"
android:layout_marginTop="60dp"
android:layout_marginEnd="50dp"
android:text="注销"
app:layout_constraintEnd_toEndOf="@+id/ZPwd"
app:layout_constraintStart_toStartOf="@+id/ZPwd"
app:layout_constraintTop_toBottomOf="@+id/ZPwd" />
</androidx.constraintlayout.widget.ConstraintLayout>- 1.
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代码：
public class MainActivity4 extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EdgeToEdge.enable(this);
setContentView(R.layout.activity_main4);
SharedPreferences sp = getSharedPreferences("data",MODE_PRIVATE);
Button button = findViewById(R.id.ZButton);
EditText name = findViewById(R.id.ZName);
EditText ZSFz = findViewById(R.id.ZxSFz);
EditText pwd = findViewById(R.id.ZPwd);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String name1 = name.getText().toString().trim();
boolean Name = sp.contains(name1);
String ZSFz1 = ZSFz.getText().toString().trim();
String pwd1 = pwd.getText().toString().trim();
String ZSFz_B = sp.getString(ZSFz1, "");
String Name1 = sp.getString(name1, "");
if (name1.length() != 0 && pwd1.length() != 0 && ZSFz1.length() != 0) {
if (Name == true) {
if (name1.equals(ZSFz_B)) {
if (pwd1.equals(Name1)) {
sp.edit().remove(name1).apply();
sp.edit().remove(ZSFz1).apply();
Toast.makeText(MainActivity4.this, "注销成功", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity4.this, "账号或密码错误", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(MainActivity4.this, "身份验证失败", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(MainActivity4.this, "账号不存在", Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(MainActivity4.this, "账号与身份验证或密码不能为空", Toast.LENGTH_SHORT).show();
}
}
});
}
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效果：
五、登陆成功
xml布局：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/s1"
tools:context=".MainActivity2">
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="88dp"
android:text="欢迎使用"
android:textSize="56dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.55"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>- 1.
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代码：
public class MainActivity2 extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EdgeToEdge.enable(this);
setContentView(R.layout.activity_main2);
ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
return insets;
});
}
}- 1.
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效果：
扫一扫
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