无用之用，可为大用

.idea/vcs.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$/pvcqgtu9x" vcs="Git" />
-  </component>
-</project>

app/src/main/AndroidManifest.xml

@@ -18,6 +18,7 @@
         </activity> <!-- 添加实现类 -->
         <activity android:name=".MainActivity" />
         <activity android:name=".LoginActivity" />
+        <activity android:name=".RegisterActivity" />
     </application>
 
 </manifest>

app/src/main/java/com/example/test/DBUtils.java

@@ -8,10 +8,12 @@ import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 
+import static android.content.ContentValues.TAG;
+
 public class DBUtils {
 
     private static String driver = "com.mysql.jdbc.Driver";//mysql驱动
-    private static String url = "jdbc:mysql://114.55.30.62/懒虫";//mysql数据库连接url
+    private static String url = "jdbc:mysql://114.55.30.62:3306/懒虫";//mysql数据库连接url
     private static String user = "root";
     private static String password = "root";
 
@@ -72,6 +74,7 @@ public class DBUtils {
             e.printStackTrace();
         } finally {
             try {
+
                 conn.close();
                 if (st != null) {
                     st.close();
@@ -84,24 +87,19 @@ public class DBUtils {
         return  -1;
 
     }
-    public boolean getInfo(int id){
+    public int getroomflag(int id){
         Connection conn = getConnection();
         Statement st = null;
         try {
             st = conn.createStatement();
-            String sql = "select * from user where uid='"+id+"'";
+            String sql = "select flag from room where id='"+id+"'";
             PreparedStatement ps = conn.prepareStatement(sql);
             if(ps!=null){
                 ResultSet rs = ps.executeQuery();
                 rs.next();
-                UserBean.uid=id;
-                UserBean.username=rs.getString("username") ;
-                UserBean.password=rs.getString("userpassword") ;
-                //UserBean.name=rs.getString("name");
-                //UserBean.age=rs.getInt("age");
-               // UserBean.imgurl=rs.getString("imgurl");
-                Log.v("uid",id+"");
-                return true;
+                int flag= rs.getInt("flag");
+                Log.v("flag",flag+"");
+                return flag;
             }
         } catch (SQLException e) {
             e.printStackTrace();
@@ -110,57 +108,62 @@ public class DBUtils {
                 conn.close();
                 if (st != null) {
                     st.close();
+
                 }
             } catch (SQLException e) {
                 e.printStackTrace();
             }
         }
-        return  false;
+        return  -1;
     }
-    public int getroomflag(int id){
+
+    public boolean setflag(int id,int flag){
         Connection conn = getConnection();
         Statement st = null;
         try {
             st = conn.createStatement();
-            String sql = "select flag from room where id='"+id+"'";
+            String sql = "update  room set flag='"+flag+"'where  id= '"+id+"'";
             PreparedStatement ps = conn.prepareStatement(sql);
-            if(ps!=null){
-                ResultSet rs = ps.executeQuery();
-                rs.next();
-                int flag= rs.getInt("flag");
-                Log.v("flag",flag+"");
-                return flag;
-            }
+            // ps.setInt(1, flag);
+            ps.executeUpdate();
+            return true;
         } catch (SQLException e) {
             e.printStackTrace();
         } finally {
             try {
-                conn.close();
                 if (st != null) {
                     st.close();
-
                 }
             } catch (SQLException e) {
                 e.printStackTrace();
             }
         }
-        return  -1;
+        return false;
     }
-
-    public boolean setflag(int id,int flag){
+    public boolean getInfo(int id){
         Connection conn = getConnection();
         Statement st = null;
         try {
             st = conn.createStatement();
-            String sql = "update  room set flag='"+flag+"'where  id= '"+id+"'";
+            String sql = "select * from user where uid='"+id+"'";
             PreparedStatement ps = conn.prepareStatement(sql);
-            // ps.setInt(1, flag);
-            ps.executeUpdate();
-            return true;
+            if(ps!=null){
+                ResultSet rs = ps.executeQuery();
+                rs.next();
+                UserBean.uid=id;
+                UserBean.username=rs.getString("username") ;
+                UserBean.password=rs.getString("userpassword") ;
+                //UserBean.name=rs.getString("name");
+               // UserBean.age=rs.getInt("age");
+                //User.imgurl=rs.getString("imgurl");
+                Log.v("uid",id+"");
+                return true;
+            }
         } catch (SQLException e) {
             e.printStackTrace();
         } finally {
             try {
+                conn.close();
                 if (st != null) {
                     st.close();
                 }
@@ -168,8 +171,7 @@ public class DBUtils {
                 e.printStackTrace();
             }
         }
-        return false;
+        return  false;
     }
 
-
 }

app/src/main/java/com/example/test/LoginActivity.java

@@ -38,7 +38,7 @@ public class LoginActivity extends AppCompatActivity {
                         int id=db.searchUser(username,userpassword);
                         Log.v("login",username+userpassword);
                         Log.v("login","lelelel");
-                        if(id!=-1){
+                            if(id!=-1){
 
 
                             //登陆成功
@@ -69,32 +69,10 @@ public class LoginActivity extends AppCompatActivity {
         register.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                final String username=name.getText().toString();
-                final String userpassword=password.getText().toString();
-
-                new Thread(){
-                    public void run(){
-                        //
-                        boolean result=db.insertUser(username,userpassword);
-                        Log.v("login",username+userpassword);
-                        Log.v("login","lelelel");
-                        if(result){
-                            //注册成功
-                            Looper.prepare();
-                            Toast toast=Toast.makeText(context, "注册成功",Toast.LENGTH_SHORT);
-                            toast.show();
-                            Looper.loop();
-                        }
-                        else{
-                            //注册失败
-                            Looper.prepare();
-                            Toast toast=Toast.makeText(context, "用户名已存在",Toast.LENGTH_SHORT);
-                            toast.show();
-                            Looper.loop();
-                        }
-                    }
-                }.start();
-
+                Log.v("login","start");
+                Intent intent = new Intent(LoginActivity.this,RegisterActivity.class);
+                startActivity(intent);
+               // Looper.loop();
             }
         });
 

app/src/main/java/com/example/test/RegisterActivity.java

@@ -0,0 +1,119 @@
+package com.example.test;
+
+import android.content.Intent;
+import android.content.pm.ActivityInfo;
+import android.graphics.Color;
+import android.os.Bundle;
+
+import android.text.TextUtils;
+import android.util.Log;
+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 androidx.appcompat.app.AppCompatActivity;
+
+public class RegisterActivity extends AppCompatActivity {
+    private TextView tv_main_title;//标题
+    private TextView tv_back;//返回按钮
+    private Button btn_doregister;//注册按钮
+    //用户名，密码，再次输入的密码的控件
+    private EditText et_user_name,et_psw,et_psw_again;
+    //用户名，密码，再次输入的密码的控件的获取值
+    private String userName, userpassword,pswAgain;
+    //标题布局
+    private RelativeLayout rl_title_bar;
+    DBUtils db=new DBUtils();
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        //设置页面布局 ,注册界面
+        setContentView(R.layout.activity_register);
+        //设置此界面为竖屏
+        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
+        init();
+    }
+
+    private void init() {
+        //从main_title_bar.xml 页面布局中获取对应的UI控件
+        tv_main_title=findViewById(R.id.tv_main_title);
+        tv_main_title.setText("注册");
+        tv_back=findViewById(R.id.tv_back);
+        //布局根元素
+        rl_title_bar=findViewById(R.id.title_bar);
+        rl_title_bar.setBackgroundColor(Color.TRANSPARENT);
+        //从activity_register.xml 页面中获取对应的UI控件
+        btn_doregister=findViewById(R.id.btn_doregister);
+        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);
+        tv_back.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                //返回键
+                RegisterActivity.this.finish();
+            }
+        });
+        //注册按钮
+        btn_doregister.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                //获取输入在相应控件中的字符串
+                getEditString();
+                Log.v("login",userName);
+                //判断输入框内容
+                if(TextUtils.isEmpty(userName)){
+                    Toast.makeText(RegisterActivity.this, "请输入用户名", Toast.LENGTH_SHORT).show();
+                   // return;
+                }else if(TextUtils.isEmpty(userpassword)){
+                    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(!userpassword.equals(pswAgain)){
+                    Toast.makeText(RegisterActivity.this, "输入两次的密码不一样", Toast.LENGTH_SHORT).show();
+                  //  return;
+                    /**
+                     *从mysql中读取输入的用户名，判断mysql中是否有此用户名
+                     */
+                }else{
+                    Toast.makeText(RegisterActivity.this, "注册成功", Toast.LENGTH_SHORT).show();
+
+                    //把账号、密码和账号标识保存到sp里面
+                    /**
+                     * 保存账号和密码到mysql中
+                     */
+                    new Thread(){
+                        public void run(){
+                            db.insertUser(userName, userpassword);
+                            //注册成功后把账号传递到LoginActivity.java中
+                            // 返回值到loginActivity显示
+                            Log.v("login","startgergrger53425324543532454254324525324");
+                            Intent data = new Intent();
+                            data.putExtra("userName", userName);
+                            setResult(RESULT_OK, data);
+                            //RESULT_OK为Activity系统常量，状态码为-1，
+                            // 表示此页面下的内容操作成功将data返回到上一页面，如果是用back返回过去的则不存在用setResult传递data值
+                            RegisterActivity.this.finish();
+                        }
+                    }.start();
+
+                }
+            }
+        });
+    }
+    /**
+     * 获取控件中的字符串
+     */
+    private void getEditString(){
+        userName=et_user_name.getText().toString().trim();
+        userpassword =et_psw.getText().toString().trim();
+        pswAgain=et_psw_again.getText().toString().trim();
+        Log.v("login",userName);
+    }
+}

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

@@ -81,7 +81,7 @@
         android:layout_marginTop="15dp"
         android:layout_marginRight="35dp"
         android:background="@drawable/register_selector"
-        android:text="注册"
+        android:text="注 册"
         android:textColor="@android:color/white"
         android:textSize="18sp" />
     <!--显示tv register , find_psw -->

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

@@ -69,16 +69,17 @@
         android:textColor="#000000"
         android:textColorHint="#a3a3a3"
         android:textSize="14sp"/>
+
     <Button
-        android:id="@+id/btn_register"
+        android:id="@+id/btn_doregister"
         android:layout_width="fill_parent"
         android:layout_height="40dp"
         android:layout_gravity="center_horizontal"
         android:layout_marginLeft="35dp"
-        android:layout_marginRight="35dp"
         android:layout_marginTop="15dp"
+        android:layout_marginRight="35dp"
         android:background="@drawable/register_selector"
-        android:text="注 册"
+        android:text="注  册"
         android:textColor="@android:color/white"
-        android:textSize="18sp"/>
+        android:textSize="18sp" />
 </LinearLayout>