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  • 10.28

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout 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:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:context=".MainActivity" >
    
        <TextView
            android:id="@+id/textView"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:background="#00BCD4"
            android:gravity="center"
            android:text="学生注册页面"
            android:textSize="30sp"
            android:textStyle="bold" />
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">
    
            <TableLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="50dp">
    
                <TableRow
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:gravity="center">
    
                    <TextView
                        android:id="@+id/textView3"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="姓名:" />
    
                    <EditText
                        android:id="@+id/e_name"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:ems="10"
                        android:inputType="textPersonName" />
                </TableRow>
    
                <TableRow
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:gravity="center">
    
                    <TextView
                        android:id="@+id/textView4"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="年龄:" />
    
                    <EditText
                        android:id="@+id/e_age"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:ems="10"
                        android:inputType="textPersonName" />
                </TableRow>
    
            </TableLayout>
    
            <Button
                android:id="@+id/button"
                android:layout_width="150dp"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:layout_margin="100dp"
                android:gravity="center"
                android:text="注册"
                android:textSize="20sp"
                android:textStyle="bold" />
        </LinearLayout>
    
    </LinearLayout>
    
    package com.example.blj;
    
    import androidx.appcompat.app.AppCompatActivity;
    
    import android.content.ContentValues;
    import android.database.sqlite.SQLiteDatabase;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.TextView;
    
    public class MainActivity extends AppCompatActivity   {
        private Button button;
        private TextView name;
        private EditText age;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            button = (Button)findViewById(R.id.button);
            name = (TextView)findViewById(R.id.e_name);
            age = (EditText) findViewById(R.id.e_age);
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    insert(name.getText().toString(),age.getText().toString());
                }
            });
        }
        public void insert(String name,String age){
            Student helper = new Student(this);
            SQLiteDatabase db = helper.getWritableDatabase();
            ContentValues values = new ContentValues();
            values.put("name",name);
            values.put("age",age);
            long id = db.insert("stu",null,values);
            db.close();
        }
    }
    package com.example.blj;
    
    import android.content.Context;
    import android.database.sqlite.SQLiteDatabase;
    import android.database.sqlite.SQLiteOpenHelper;
    
    import androidx.annotation.Nullable;
    
    public class Student extends SQLiteOpenHelper {
        public Student(@Nullable Context context) {
            super(context, "student.db", null, 3);
        }
    
        @Override
        public void onCreate(SQLiteDatabase db) {
            String sql = "CREATE TABLE stu(s_id INTEGER PRIMARY KEY AUTOINCREMENT,name VARCHAR(20),age INTEGER)";
            db.execSQL(sql);
        }
    
        @Override
        public void onUpgrade(SQLiteDatabase db, int i, int i1) {
            String sql = "CREATE TABLE bj(b_id INTEGER PRIMARY KEY AUTOINCREMENT,b_name VARCHAR(20))";
            db.execSQL(sql);
        }
    }
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  • 原文地址:https://www.cnblogs.com/zrz1/p/13931008.html
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