Initial commit

app/src/main/AndroidManifest.xml

@@ -12,7 +12,7 @@
         android:theme="@style/Theme.AppCompat.NoActionBar"
         tools:targetApi="31">
         <activity
-            android:name=".RegisterActivity"
+            android:name=".activity.RegisterActivity"
             android:exported="false" />
         <activity
             android:name=".activity.SplashActivity"

app/src/main/java/com/youxuegu/MainActivity.java

@@ -2,8 +2,11 @@ package com.youxuegu;
 
 import androidx.appcompat.app.AppCompatActivity;
 
+import android.content.Intent;
 import android.os.Bundle;
 
+import com.youxuegu.activity.RegisterActivity;
+
 /**
  * @author YoVinchen
  */
@@ -13,5 +16,7 @@ public class MainActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+        Intent intent = new Intent(MainActivity.this, RegisterActivity.class);
+        startActivity(intent);
     }
 }

app/src/main/java/com/youxuegu/activity/RegisterActivity.java

@@ -2,19 +2,107 @@ package com.youxuegu.activity;
 
 import androidx.appcompat.app.AppCompatActivity;
 
+import android.content.Intent;
+import android.graphics.Color;
 import android.os.Bundle;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.RelativeLayout;
+import android.widget.TextView;
+import android.widget.Toast;
 
 import com.youxuegu.R;
+import com.youxuegu.utils.UtilsHelper;
 
 /**
  * @author YoVinchen
  */
 public class RegisterActivity extends AppCompatActivity {
 
+    //标题栏与返回按钮
+    private TextView tv_mian_title, tv_back;
+    //标题栏布局
+    private RelativeLayout rl_title_bar;
+    //注册按钮
+    private Button btn_register;
+    //用户名密码二次密码输入框
+    private EditText et_user_name, et_psw, et_psw_again;
+    private String userName, psw, pswAgain;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_register);
     }
 
+    private void init() {
+        tv_mian_title = findViewById(R.id.tv_main_title);
+        tv_mian_title.setText("注册");
+        tv_back = findViewById(R.id.tv_back);
+        rl_title_bar = findViewById(R.id.title_bar);
+        //设置标题栏的背景颜色为透明
+        rl_title_bar.setBackgroundColor(Color.TRANSPARENT);
+        btn_register = findViewById(R.id.btn_register);
+        et_user_name = findViewById(R.id.et_user_name);
+        et_psw = findViewById(R.id.et_psw);
+        et_psw_again = findViewById(R.id.et_psw_again);
+
+        //返回按钮的点击事件
+        tv_back.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                RegisterActivity.this.finish();
+            }
+        });
+        //注册按钮的点击事件
+        btn_register.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                getEditString();
+                if (TextUtils.isEmpty(userName)) {
+                    Toast.makeText(RegisterActivity.this, "请输入用户名", Toast.LENGTH_SHORT).show();
+                    return;
+                } else if (TextUtils.isEmpty(psw)) {
+                    Toast.makeText(RegisterActivity.this, "请输入密码", Toast.LENGTH_SHORT).show();
+                    return;
+                } else if (TextUtils.isEmpty(pswAgain)) {
+                    Toast.makeText(RegisterActivity.this, "请再次输入密码", Toast.LENGTH_SHORT).show();
+                    return;
+                }else if (psw.equals(pswAgain)) {
+                    Toast.makeText(RegisterActivity.this, "输入两次密码不一致", Toast.LENGTH_SHORT).show();
+                    return;
+                }else if (psw.equals(pswAgain)) {
+                    Toast.makeText(RegisterActivity.this, "输入两次密码不一致", Toast.LENGTH_SHORT).show();
+                    return;
+                }else if (UtilsHelper.isExistUserName(RegisterActivity.this,userName)) {
+                    Toast.makeText(RegisterActivity.this, "此用户名已存在", Toast.LENGTH_SHORT).show();
+                    return;
+                }else {
+                    Toast.makeText(RegisterActivity.this, "注册成功", Toast.LENGTH_SHORT).show();
+                    //把用户名和密码保存到SharedPreferences文件中
+                    UtilsHelper.saveUserInfo(RegisterActivity.this, userName, psw);
+                    //注册成功后把用户名传递到LoginActivity中
+                    Intent data =new Intent();
+                    data.putExtra("userName", userName);
+                    setResult(RESULT_OK, data);
+                    RegisterActivity.this.finish();
+                }
+            }
+        });
+    }
+
+    /**
+     * 获取界面控件中的注册信息
+     */
+    private void getEditString() {
+        //获取注册界面中输入的用户名信息
+        userName = et_user_name.getText().toString().trim();
+        //获取注册界面中输入的密码信息
+        psw = et_psw.getText().toString().trim();
+        //获取注册界面中输入的二次密码信息
+        pswAgain = et_psw_again.getText().toString().trim();
+    }
+
 }