如何在 android 中批量插入 sqlite

Question

我正在使用 SQLiteOpenHelper 进行数据插入。我需要插入 2500 个 id 和 2500 个名字，所以太花时间了。请任何人帮助我如何减少插入时间。我们可以一次插入多条记录吗？任何人帮助我。先感谢您。代码：

public class DatabaseHandler extends SQLiteOpenHelper {
    SQLiteDatabase db;
    private static final int DATABASE_VERSION = 8;
    private static final String TABLE_CITY = "CITYDETAILS";
    public DatabaseHandler(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
        this.mContext = context;
}

public void onCreate(SQLiteDatabase db) {
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_CITY );
    String CREATE_CITY_TABLE = "CREATE TABLE " + TABLE_CITY + "("
                + CityId + " INTEGER," + CityName + " TEXT " + ")";
    db.execSQL(CREATE_CITY_TABLE);
    db.execSQL(CREATE_RechargeTypes_TABLE);
    this.db=db;
 }

 @Override
 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
     // Drop older table if existed
     // Create tables again
     onCreate(db);
 }

 public  void add_city(String cityid,String cityname){
     SQLiteDatabase db = this.getWritableDatabase();
     db.beginTransaction();
     ContentValues values = new ContentValues();
     values.put(CityId, cityid);
     values.put(CityName, cityname);
     db.insert(TABLE_CITY, null, values);
     db.insertWithOnConflict(TABLE_CITY, null, values, SQLiteDatabase.CONFLICT_IGNORE);
     db.setTransactionSuccessful();
     db.endTransaction();
     }
}

activity 课程：

try{
            String Status = result.get("Status").getAsString();
            if (TextUtils.equals(Status, "true")) {
                Gson gson = new Gson();

                JsonArray array = result.get("data")
                        .getAsJsonArray();
                Type type = new TypeToken<ArrayList<Cities>>() {
                }.getType();
                setmCities((ArrayList<Cities>) gson.fromJson(array, type));
                for(int i=0;i< array.size();i++) {

                   db.add_city(mCities.get(i).getCityid(),mCities.get(i).getCityname());

                }
            }

Answer 1

使用事务插入所有行 -- 不是每个事务插入一行。

SQLiteDatabase db = ...
db.beginTransaction();
try {
    // do ALL your inserts here
    db.setTransactionSuccessful()
} finally {
    db.endTransaction();
}

编辑

public void add_cities(List<Cities> list) {
    SQLiteDatabase db = this.getWritableDatabase();
    db.beginTransaction();
    try {
        ContentValues values = new ContentValues();
        for (Cities city : list) {
            values.put(CityId, city.getCityid());
            values.put(CityName, city.getCityName());
            db.insert(TABLE_CITY, null, values);
        }
        db.setTransactionSuccessful();
    } finally {
        db.endTransaction();
    }
}

所有插入，一个事务。

Answer 2

将您的查询放在 string.xml 中的字符串数组中，使用资源处理程序在代码中打开它们并循环执行它们。在循环之前使用 beginTransaction() 和 entTransaction() 方法在失败的情况下回滚更改。

Answer 3

谢谢@karakuri。我将城市 ID 和城市名称列表传递给 add_city 函数并遍历该列表并插入所有数据。由此我们可以在很短的时间内将数据插入数据库。

数据库class:

public void add_cities(ArrayList<Cities> list) {
        SQLiteDatabase db = this.getWritableDatabase();
        db.beginTransaction();
        try {
            ContentValues values = new ContentValues();
            for (Cities city : list) {
                values.put(CityId, city.getCityid());
                values.put(CityName, city.getCityname());
                db.insert(TABLE_CITY, null, values);
            }
            db.setTransactionSuccessful();
        } finally {
            db.endTransaction();
        }
    }

数据class:

public class Cities {
    public String getCityid() {
        return cityid;
    }

    public void setCityid(String cityid) {
        this.cityid = cityid;
    }

    public String getCityname() {
        return cityname;
    }

    public void setCityname(String cityname) {
        this.cityname = cityname;
    }

    @Expose

    private String cityid="0";

    @Expose
    private String cityname="";

    public Cities(){
    }

}

activity class:

 ArrayList<Cities> mCities;
     protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_splash);
            db = new DatabaseHandler(getApplicationContext());
           executeCircleAndOperatorsList();

        }
      void executeCircleAndOperatorsList() {
     db.ClearTables();
            ServiceClient serviceClient = ServiceUtil.getServiceClient();
            JsonParser jsonParser = new JsonParser();

           mCitiesCallback = new CancelableCallback(citiescallback);

            serviceClient.getCities("getCities_v1", mCitiesCallback);
    }
    Callback<JsonObject> citiescallback=new Callback<JsonObject>() {

            @Override
            public void success(final JsonObject jsonObject, Response response) {
                Thread t=new Thread(new Runnable() {
                    @Override
                    public void run() {
                        parsecities(jsonObject);
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(getApplicationContext(), "msg msg", Toast.LENGTH_SHORT).show();

                                Intent intent=new Intent(SplashActivity.this,LoginAcivtiy.class);
                                startActivity(intent);
                            }
                        });
                    }
                });
                t.start();

            }

            @Override
            public void failure(RetrofitError error) {

            }
        };
        public void parsecities(JsonObject result) {
            //Log.v("TAG_RESULT", "" +result.toString());
            try{
                String Status = result.get("Status").getAsString();
                if (TextUtils.equals(Status, "true")) {
                    Gson gson = new Gson();

                    JsonArray array = result.get("data")
                            .getAsJsonArray();
                    Type type = new TypeToken<ArrayList<Cities>>() {
                    }.getType();
                    setmCities((ArrayList<Cities>) gson.fromJson(array, type));
                    long start = System.currentTimeMillis();
                    db.add_cities(mCities);

                    System.out.println(System.currentTimeMillis() - start);
                    circle_list=db.get_cities();
                    Log.v("TAG_CIRCLELIST",""+circle_list);



                }
                else if (TextUtils.equals("Status", "false")) {

                    // showToast(operators.getMessage());

                } else {
                    throw new JSONException("Something went wrong ");
                }        }catch(Exception e){
                e.printStackTrace();

            }

        }
      public void setmCities(ArrayList<Cities> mCities) {
            this.mCities = mCities;
        }
    }

Answer 4

试试 SQLiteStatement
比 beginTransaction()

快 2-3 倍

public void add_cities(ArrayList<Cities> list) {
    SQLiteDatabase database = this.getWritableDatabase();
    String sql = "INSERT INTO " + TABLE_NAME + " VALUES(?, ?)";
    SQLiteStatement statement = database.compileStatement(sql);
    database.beginTransaction();
    try {
        for (Cities c : list) {
            statement.clearBindings();
            statement.bindLong(1, c.getCityId());
            statement.bindLong(2, c.getCityName());
            statement.execute();
        }
        database.setTransactionSuccessful();
    } finally {
        database.endTransaction();
    }
}

Answer 5

这个答案来晚了，但我可以帮助其他人以简单的方式插入许多行有一种方法可以插入多行 让我们创建我们想要插入的值（根据您的值添加一个循环）

public String getMultiInsertValues(){
      StringBuilder valueToInsert = new StringBuilder()
//start loop
      valueToInsert.append("(")
      valueToInsert.append(id)
      valueToInsert.append("),")
      valueToInsert.append("(")
      valueToInsert.append(name)
      valueToInsert.append("),")
//end of the loop      
      valueToInsert.deleteCharAt(valueToInsert.lastIndexOf(","))
      valueToInsert.append(";")
      return valueToInsert.toString()
}

然后我们将这个值加到sql

    String sql = "INSERT INTO " + tableName + " ( id ) VALUES \n" + valueToInsert 
    //value to Insert from the last function

最后我们应该执行这个sql

SQLiteDatabase db = getWritableDatabase();
db.execSQL(sql);

注意 sqlite 中有最大变量和条款条件你应该将你的值除以 500 并使用上述解决方案插入每个 500，因为会有多个 sql 查询 i建议您像其他答案中提到的那样使用 beginTransaction

如何在 android 中批量插入 sqlite

how to bulk insert in sqlite in android

sqlite

android

sqliteopenhelper