页面跳转、登录注册验证

app/src/main/AndroidManifest.xml

@@ -13,7 +13,7 @@
         tools:targetApi="31">
 
         <activity
-            android:name=".LoginActivity"
+            android:name=".UserInfoActivity"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -26,7 +26,7 @@
             android:exported="false" />
 
         <activity
-            android:name=".UserInfoActivity"
+            android:name=".LoginActivity"
             android:exported="false" />
 
     </application>

app/src/main/java/cc/liuyx/app/LoginActivity.java

@@ -1,20 +1,28 @@
 package cc.liuyx.app;
 
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.View;
-import android.widget.Button;
+import android.widget.EditText;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import androidx.appcompat.app.AppCompatActivity;
 
-public class LoginActivity extends AppCompatActivity {
+public class LoginActivity extends AppCompatActivity implements View.OnClickListener {
+
+    private EditText usernameEdit, passwdEdit;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_login);
 
+        usernameEdit = findViewById(R.id.login_username);
+        passwdEdit = findViewById(R.id.login_passwd);
+
+        findViewById(R.id.btn_login).setOnClickListener(this);
         TextView textView = findViewById(R.id.click_register);
         textView.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -22,13 +30,42 @@ public class LoginActivity extends AppCompatActivity {
                 startActivity(new Intent(LoginActivity.this, RegisterActivity.class));
             }
         });
+    }
 
-        Button btnLogin = findViewById(R.id.btn_login);
+    @Override
-        btnLogin.setOnClickListener(new View.OnClickListener() {
+    public void onClick(View v) {
-            @Override
+        switch (v.getId()) {
-            public void onClick(View view) {
+            case R.id.btn_login:
-                startActivity(new Intent(LoginActivity.this, UserInfoActivity.class));
+                login();
+                break;
+        }
+    }
+
+    private void login() {
+        String username = usernameEdit.getText().toString();
+        String passwd = passwdEdit.getText().toString();
+
+        if (!username.equals("") && !passwd.equals("")) {
+            SharedPreferences sp = getSharedPreferences("loginStatus", MODE_PRIVATE);
+            String localName = sp.getString("username", null);
+            String localPasswd = sp.getString("passwd", null);
+            if (!username.equals(localName) || !passwd.equals(localPasswd)) {
+                Toast.makeText(LoginActivity.this, "用户名或密码错误>_<", Toast.LENGTH_SHORT).show();
+                return;
             }
-        });
+
+            SharedPreferences.Editor editor = sp.edit();
+            editor.putBoolean("isLoggedIn", true);
+            editor.putString("username", username);
+            editor.apply();
+
+            Intent intent = new Intent(LoginActivity.this, UserInfoActivity.class);
+            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
+            startActivity(intent);
+        } else {
+            Toast.makeText(LoginActivity.this, "请填入用户名与密码哦~", Toast.LENGTH_SHORT).show();
+        }
+
+
     }
 }

app/src/main/java/cc/liuyx/app/RegisterActivity.java

@@ -1,18 +1,40 @@
 package cc.liuyx.app;
 
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.view.View;
+import android.widget.EditText;
 import android.widget.ImageView;
+import android.widget.Toast;
 
 import androidx.appcompat.app.AppCompatActivity;
 
-public class RegisterActivity extends AppCompatActivity {
+public class RegisterActivity extends AppCompatActivity implements View.OnClickListener {
+
+    private String username = "";
+    private String passwd = "";
+    private String passwdAgain = "";
+    private String phone = "";
+    private String email = "";
+
+    private EditText usernameEdit, passwdEdit, passwdAgainEdit, phoneEdit, emailEdit;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_register);
 
+        // 初始化每个组件
+        usernameEdit = findViewById(R.id.username);
+        passwdEdit = findViewById(R.id.passwd);
+        passwdAgainEdit = findViewById(R.id.passwd2);
+        phoneEdit = findViewById(R.id.phone);
+        emailEdit = findViewById(R.id.email);
+
+        findViewById(R.id.btn_register).setOnClickListener(this);
+
         ImageView back = findViewById(R.id.register_back);
         back.setOnClickListener(new View.OnClickListener() {
             @Override
@@ -22,4 +44,43 @@ public class RegisterActivity extends AppCompatActivity {
             }
         });
     }
+
+    @Override
+    public void onClick(View v) {
+        if (v.getId() == R.id.btn_register) {
+            validateRegister();
+        }
+    }
+
+    private void validateRegister() {
+        Intent intent = new Intent(RegisterActivity.this, UserInfoActivity.class);
+
+        username = usernameEdit.getText().toString();
+        passwd = passwdEdit.getText().toString();
+        passwdAgain = passwdAgainEdit.getText().toString();
+        email = emailEdit.getText().toString();
+        phone = phoneEdit.getText().toString();
+
+        // 判断两次密码是否相等
+        if (passwd.equals(passwdAgain)) {
+            if (!username.equals("") && !passwd.equals("")) {
+                // 设置登录状态
+                SharedPreferences sharedPreferences = getSharedPreferences("loginStatus", Context.MODE_PRIVATE);
+                SharedPreferences.Editor editor = sharedPreferences.edit();
+                editor.putBoolean("isLoggedIn", true);
+                editor.putString("username", username);
+                editor.putString("email", email);
+                editor.putString("phone", phone);
+                editor.putString("passwd", passwd);
+                editor.apply();
+
+                intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
+                startActivity(intent);
+            } else {
+                Toast.makeText(RegisterActivity.this, "请填入用户名与密码哦~", Toast.LENGTH_SHORT).show();
+            }
+        } else {
+            Toast.makeText(RegisterActivity.this, "两次密码输入不一致！", Toast.LENGTH_SHORT).show();
+        }
+    }
 }

app/src/main/java/cc/liuyx/app/UserInfoActivity.java

@@ -1,14 +1,65 @@
 package cc.liuyx.app;
 
+import android.annotation.SuppressLint;
+import android.content.Intent;
+import android.content.SharedPreferences;
 import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+import android.widget.TextView;
 
 import androidx.appcompat.app.AppCompatActivity;
 
-public class UserInfoActivity extends AppCompatActivity {
+public class UserInfoActivity extends AppCompatActivity implements View.OnClickListener {
 
+    private String username = "";
+    private String phone = "";
+    private String email = "";
+
+    @SuppressLint("SetTextI18n")
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_user_info);
+
+        // 判断用户是否已经登录
+        // 如果未登录，则跳转至登录页面
+        SharedPreferences preferences = getSharedPreferences("loginStatus", MODE_PRIVATE);
+        boolean isLogin = preferences.getBoolean("isLoggedIn", false);
+        System.out.println(isLogin);
+        if (!isLogin) {
+            // 跳转到 LoginActivity
+            Intent intent = new Intent(UserInfoActivity.this, LoginActivity.class);
+            startActivity(intent);
+            finish();
+            return;
+        }
+
+        username = preferences.getString("username", null);
+        email = preferences.getString("email", null);
+        phone = preferences.getString("phone", null);
+
+        TextView userName = findViewById(R.id.user_username);
+        TextView userPhone = findViewById(R.id.user_phone);
+        TextView userEmail = findViewById(R.id.user_email);
+        userName.setText(userName.getText() + username);
+        userPhone.setText(userPhone.getText() + phone);
+        userEmail.setText(userEmail.getText() + email);
+
+        Button btnLogout = findViewById(R.id.logout);
+        btnLogout.setOnClickListener(this);
+    }
+
+    @Override
+    public void onClick(View view) {
+        if (view.getId() == R.id.logout) {
+            SharedPreferences preferences = getSharedPreferences("loginStatus", MODE_PRIVATE);
+            SharedPreferences.Editor edit = preferences.edit();
+            edit.remove("isLoggedIn");
+            edit.apply();
+
+            finish();
+            startActivity(new Intent(this, LoginActivity.class));
+        }
     }
 }

app/src/main/res/layout/activity_login.xml

@@ -23,7 +23,7 @@
         android:textSize="18sp" />
 
     <EditText
-        android:id="@+id/editTextTextPersonName"
+        android:id="@+id/login_username"
         android:layout_width="357dp"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"
@@ -35,7 +35,7 @@
         android:textSize="15sp" />
 
     <EditText
-        android:id="@+id/editTextTextPassword"
+        android:id="@+id/login_passwd"
         android:layout_width="357dp"
         android:layout_height="wrap_content"
         android:layout_margin="10dp"

app/src/main/res/layout/activity_register.xml

@@ -41,7 +41,7 @@
         android:hint="来将可留姓名？"
         android:inputType="textPersonName"
         android:lines="1"
-        android:textSize="15sp" />
+        android:textSize="@dimen/normal_font_size" />
 
     <EditText
         android:id="@+id/passwd"
@@ -54,7 +54,7 @@
         android:hint="对对暗号"
         android:inputType="textPassword"
         android:lines="1"
-        android:textSize="15sp" />
+        android:textSize="@dimen/normal_font_size" />
 
     <EditText
         android:id="@+id/passwd2"
@@ -67,7 +67,7 @@
         android:hint="重复暗号"
         android:inputType="textPassword"
         android:lines="1"
-        android:textSize="15sp" />
+        android:textSize="@dimen/normal_font_size" />
 
     <EditText
         android:id="@+id/phone"
@@ -80,7 +80,7 @@
         android:inputType="phone"
         android:lines="1"
         android:textAllCaps="false"
-        android:textSize="15sp" />
+        android:textSize="@dimen/normal_font_size" />
 
     <EditText
         android:id="@+id/email"
@@ -92,7 +92,7 @@
         android:hint="邮箱也留个噻"
         android:inputType="textEmailAddress"
         android:lines="1"
-        android:textSize="15sp" />
+        android:textSize="@dimen/normal_font_size" />
 
     <Button
         android:id="@+id/btn_register"

app/src/main/res/layout/activity_user_info.xml

@@ -11,8 +11,8 @@
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginTop="55dp"
+        android:layout_marginTop="45dp"
-        android:layout_marginBottom="35dp"
+        android:layout_marginBottom="30dp"
         android:gravity="center">
 
         <ImageView
@@ -22,7 +22,64 @@
     </LinearLayout>
 
     <LinearLayout
-        android:id="@+id/user_edit"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@drawable/shape_infoitem"
+        android:gravity="center">
+
+        <ImageView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:src="@drawable/ic_user" />
+
+        <TextView
+            android:id="@+id/user_username"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="8"
+            android:text="  用户名："
+            android:textSize="@dimen/normal_font_size" />
+
+        <ImageView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_gravity="end"
+            android:layout_weight="1"
+            android:src="@drawable/ic_arrow_right" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@drawable/shape_infoitem"
+        android:gravity="center">
+
+        <ImageView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:src="@drawable/ic_phone" />
+
+        <TextView
+            android:id="@+id/user_phone"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="8"
+            android:text="  手机号："
+            android:textSize="@dimen/normal_font_size" />
+
+        <ImageView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_gravity="end"
+            android:layout_weight="1"
+            android:src="@drawable/ic_arrow_right" />
+
+    </LinearLayout>
+
+    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginBottom="15dp"
@@ -33,14 +90,15 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="1"
-            android:src="@drawable/ic_edit" />
+            android:src="@drawable/ic_email" />
 
         <TextView
+            android:id="@+id/user_email"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_weight="8"
-            android:text="  修改信息"
+            android:text="  邮箱："
-            android:textSize="16sp" />
+            android:textSize="@dimen/normal_font_size" />
 
         <ImageView
             android:layout_width="0dp"
@@ -70,7 +128,7 @@
             android:layout_height="wrap_content"
             android:layout_weight="8"
             android:text="  设置"
-            android:textSize="16sp" />
+            android:textSize="@dimen/normal_font_size" />
 
         <ImageView
             android:layout_width="0dp"
@@ -99,7 +157,7 @@
             android:layout_height="wrap_content"
             android:layout_weight="8"
             android:text="  更多"
-            android:textSize="16sp" />
+            android:textSize="@dimen/normal_font_size" />
 
         <ImageView
             android:layout_width="0dp"
@@ -110,16 +168,35 @@
 
     </LinearLayout>
 
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="20dp"
+        android:gravity="center">
+
+
+    </LinearLayout>
+
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
+        <Button
+            android:id="@+id/logout"
+            android:layout_width="200dp"
+            android:layout_height="wrap_content"
+            android:layout_above="@+id/footnote"
+            android:layout_centerHorizontal="true"
+            android:layout_marginBottom="30dp"
+            android:text="退出登录" />
+
         <TextView
+            android:id="@+id/footnote"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_alignParentBottom="true"
             android:layout_marginBottom="10dp"
-            android:text="联系我：liuyxcc@gmail.com"
+            android:text="@string/footnote"
             android:textAlignment="center" />
     </RelativeLayout>
 

app/src/main/res/values/dimens.xml

@@ -3,4 +3,5 @@
     <dimen name="activity_horizontal_margin">16dp</dimen>
     <dimen name="activity_vertical_margin">16dp</dimen>
     <dimen name="fab_margin">16dp</dimen>
+    <dimen name="normal_font_size">16sp</dimen>
 </resources>

app/src/main/res/values/strings.xml

@@ -10,4 +10,6 @@
     <string name="hello_first_fragment">Hello first fragment</string>
     <string name="hello_second_fragment">Hello second fragment. Arg: %1$s</string>
     <string name="title_activity_register">RegisterActivity</string>
+
+    <string name="footnote">联系我：liuyxcc@gmail.com</string>
 </resources>