1.新建安卓工程後新建一個類：DatabaseHelper.java，該類繼承自SQLiteOpenHelper，主要用於新建資料庫，新建資料表和更新資料庫：

public class DatabaseHelper extends SQLiteOpenHelper {
    //類沒有例項化,是不能用作父類構造器的引數,必須宣告為靜態
private static final String name = "youyu"; //資料庫名稱
private static final int version = 1; //資料庫版本
public DatabaseHelper(Context context) {
        super
 
(context, name, null, version);
    }

    @Override
public void onCreate(SQLiteDatabase db) {

    }

    @Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
       
    }
}

2.新建類YouYuDBHelper

public class YouYuDBHelper {
    private DatabaseHelper databaseHelper;
    public  
 
YouYuDBHelper(Context context){
        databaseHelper = new DatabaseHelper(context);
    }
    public void dropTable(String sql){

    }
    public void closeDataBase(String sql){
        databaseHelper.getWritableDatabase().close();
    }
    public void createTableUser(){//建立自己需要的表
String sql = "CREATE TABLE IF NOT EXISTS TB_User(id integer primary key autoincrement,name,year,job,address)"
 
;
        databaseHelper.getWritableDatabase().execSQL(sql);
    }
    public void insertUser(String name,String year,String job,String address){//資料插入
SQLiteDatabase db = databaseHelper.getWritableDatabase();
        String sql = "insert into TB_User(name,year,job,address) values(?,?,?,?)";
        db.execSQL(sql,new Object[]{name,year,job,address});
        db.close();
    }
    public List<User> selectUser(){//資料查詢，返回一個集合（可以根據自己的需要來修改返回值）
List<User> list = new ArrayList<>();
        SQLiteDatabase db = databaseHelper.getWritableDatabase();
        String sql = "select * from TB_User";
        Cursor cursor = db.rawQuery(sql,null);
        while (cursor.moveToNext()){
            User user = new User();
            user.setId(cursor.getInt(0));
            user.setName(cursor.getString(1));
            user.setYear(cursor.getString(2));
            user.setJob(cursor.getString(3));
            user.setAddress(cursor.getString(4));
            list.add(user);
        }
        cursor.close();
        db.close();
        return list;
    }
}

3.在Activity中的使用

public class MainActivity extends Activity implements View.OnClickListener{
    

   private TextView tv_content;
    private TextView tv_txt;
    private Button btn_insert;
    private Button btn_select;
    private YouYuDBHelper dbHelper;

    @Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();//初始化控制元件
        dbHelper = new YouYuDBHelper(MainActivity.this);
        dbHelper.createTableUser();//新建一個表
    }

    private void initView() {
        tv_content = (TextView)findViewById(R.id.tv_content);
        tv_txt = (TextView)findViewById(R.id.tv_txt);
        btn_insert = (Button)findViewById(R.id.btn_insert);
        btn_select = (Button)findViewById(R.id.btn_select);
      
        btn_insert.setOnClickListener(this);
        btn_select.setOnClickListener(this);
    }


 

    @Override
public void onClick(View v) {
        switch(v.getId()){
           
        
            case R.id.btn_insert:
                for (int i = 0;i < 4;i++){
                    dbHelper.insertUser("王日"+(i+1),"20","銷售","上海市嘉定區");//插入操作
                }
                break;
            case R.id.btn_select:
              List<User> list =  dbHelper.selectUser();//查詢操作
                tv_content.setText(list.get(0).getId()+"--"+list.get(0).getName()+"---"+list.get(0).getYear()+"--"+list.get(0).getJob()+"---"+list.get(0).getAddress());
                tv_txt.setText(list.get(1).getId()+"--"+list.get(1).getName()+"---"+list.get(1).getYear()+"--"+list.get(1).getJob()+"---"+list.get(1).getAddress());
                break;
        }
    }