在Android中从外部.sql文件导入Sqlite模式和Sqlite数据

要求：我不想使用任何java类创建数据库。我想为我的android应用程序提供schema.sql（创建数据库和表）和seeddata.sqlite（将数据插入表）文件。当我的应用程序第一次运行时，应该先运行schema.sqlite，然后再运行seeddata.sql。

---

问题：我不知道该怎么做。

如果我理解您的问题，以下内容可能与您所寻找的内容大致相同：-

    SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(this.getDatabasePath("mydb"),null);
    // Loop through schema.sql (Noting that execSQL will only execute 1 SQL statment at a time)
    db.execSQL("CREATE TABLE IF NOT EXISTS tablea (_name TEXT, _anotherrow TEXT, _etc TEXT)");
    if (DatabaseUtils.queryNumEntries(db,"tablea") < 1) {
        // Loop through seeddata here (if actual SQL then use execSQL)
        ContentValues cv = new ContentValues();
        cv.put("_name", "This is the name.");
        cv.put("_anotherrow", "Someother data");
        cv.put("_etc", "and on and on.....");
        db.insert("tablea", null, cv);
    }
    Cursor csr = db.query("tablea",null,null,null,null,null,null);
    while (csr.moveToNext()) {
        Log.d("TABLEINFO","Row " + csr.getPosition());
        for(String s: csr.getColumnNames()) {
            Log.d("TABLEINFO","\tColumn=" + s + " Data=" + csr.getString(csr.getColumnIndex(s)));
        }
    }

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完整工作解决方案

• 1个文件schema.sql，该文件已放入资产文件夹（在本例中，该文件用于名为importschemanddata

  D:\Android\u Applications\importschemanddata\app\src\main\assets\schema.sql的项目）

:-

• 2文件seeddata.sql（同样放在资产文件夹中）

:-

注意：您可能需要创建资产文件夹（有关位置，请参见上文）

• 3代码（在本例中为MainActivity）

:-

初次运行的结果：- 后续运行的结果：-

---

逐行阅读您的文件（

java.io.BufferedReader#readLine

）并使用

SQLiteDatabase#execSQL

我感谢您，这是一个完美的解决方案。Thanks@MikeT是否可以通过android代码将.sql文件导入sqlite？如果可以，如何…@GajuKollur这就是答案（完整的工作解决方案）@MikeT但在解决方案中有一个模式文件…但我只有.sql文件..我必须通过读取此文件来创建一个适当的表，并通过读取相同的.sql文件将数据插入数据库..@GajuKollur 1 file 100文件，只要文件包含有效的sql，就可以使用相同的原则调用它们。您只需相应地修改代码。

11-24 17:06:04.601 3360-3360/? D/TABLEINFO: Row 0
11-24 17:06:04.601 3360-3360/? D/TABLEINFO:     Column=_name Data=This is the name.
11-24 17:06:04.601 3360-3360/? D/TABLEINFO:     Column=_anotherrow Data=Someother data
11-24 17:06:04.601 3360-3360/? D/TABLEINFO:     Column=_etc Data=and on and on.....

CREATE TABLE tablea (_id INTEGER PRIMARY KEY, _name TEXT, _otherdata TEXT, _etc)
CREATE TABLE tableb (_id INTEGER PRIMARY KEY, _name TEXT, _otherdata TEXT, _etc)
CREATE TABLE tablec (_id INTEGER PRIMARY KEY, _name TEXT, _otherdata TEXT, _etc)

INSERT INTO tablea (_name,_otherdata, _etc) VALUES("Fred","Data for Fred","even more data for Fred.")
INSERT INTO tablea (_name,_otherdata, _etc) VALUES("Bert","Data for Bert","even more data for Bert.")
INSERT INTO tablea (_name,_otherdata, _etc) VALUES("Tom","Data for Tom","even more data for Tom.")
INSERT INTO tablea (_name,_otherdata, _etc) VALUES("Harry","Harry has this data.","Harry has even more data.")
INSERT INTO tableb (_name,_otherdata, _etc) VALUES("Fred","Data for Fred","even more data for Fred.")
INSERT INTO tableb (_name,_otherdata, _etc) VALUES("Bert","Data for Bert","even more data for Bert.")
INSERT INTO tableb (_name,_otherdata, _etc) VALUES("Tom","Data for Tom","even more data for Tom.")
INSERT INTO tableb (_name,_otherdata, _etc) VALUES("Harry","Harry has this data.","Harry has even more data.")
INSERT INTO tablec (_name,_otherdata, _etc) VALUES("Fred","Data for Fred","even more data for Fred.")
INSERT INTO tablec (_name,_otherdata, _etc) VALUES("Bert","Data for Bert","even more data for Bert.")
INSERT INTO tablec (_name,_otherdata, _etc) VALUES("Tom","Data for Tom","even more data for Tom.")
INSERT INTO tablec (_name,_otherdata, _etc) VALUES("Harry","Harry has this data.","Harry has even more data.")

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        InputStream schema, seeddata;
        String lineofdata;
        SQLiteDatabase db;
        Cursor csr;

        try {
            schema = this.getAssets().open("schema.sql");
            seeddata = this.getAssets().open("seeddata.sql");
        } catch (IOException ioe) {
            ioe.printStackTrace();
            return; //???? used return just for brevity
        }
        File dbpath = new File(this.getDatabasePath("mydb").getParent());
        if (!dbpath.exists()) {
            dbpath.mkdirs();

            db = SQLiteDatabase.openOrCreateDatabase(this.getDatabasePath("mydb"), null);
            BufferedReader br = new BufferedReader(new InputStreamReader(schema));
            try {
                while ((lineofdata = br.readLine()) != null) {
                    Log.d("ACTIONSQL", "Actioning " + lineofdata);
                    db.execSQL(lineofdata);
                }
                schema.close();
            } catch (IOException ioe) {
                ioe.printStackTrace();
                try {
                    schema.close();
                } catch (IOException ioe2) {
                    ioe2.printStackTrace();
                }
            }
            db.close();
            db = SQLiteDatabase.openDatabase(this.getDatabasePath("mydb").getPath(),null, Context.MODE_PRIVATE);
            lineofdata = "";
            br = new BufferedReader(new InputStreamReader(seeddata));
            try {
                while ((lineofdata = br.readLine()) != null) {
                    Log.d("ACTIONSQL", "Actioning " + lineofdata);
                    db.execSQL(lineofdata);
                }
            } catch (IOException ioe) {
                ioe.printStackTrace();
                db.endTransaction();
            }
        }  else {
            db = SQLiteDatabase.openDatabase(this.getDatabasePath("mydb").getPath(),null,Context.MODE_PRIVATE);
        }

        csr = db.query("tablea",null,null,null,null,null,null);
        while (csr.moveToNext()) {
            Log.d("TABLEINFO","Row " + csr.getPosition());
            for(String s: csr.getColumnNames()) {
                Log.d("TABLEINFO","\tColumn=" + s + " Data=" + csr.getString(csr.getColumnIndex(s)));
            }
        }
        csr = db.query("tableb",null,null,null,null,null,null);
        while (csr.moveToNext()) {
            Log.d("TABLEINFO","Row " + csr.getPosition());
            for(String s: csr.getColumnNames()) {
                Log.d("TABLEINFO","\tColumn=" + s + " Data=" + csr.getString(csr.getColumnIndex(s)));
            }
        }
        csr = db.query("tablec",null,null,null,null,null,null);
        while (csr.moveToNext()) {
            Log.d("TABLEINFO","Row " + csr.getPosition());
            for(String s: csr.getColumnNames()) {
                Log.d("TABLEINFO","\tColumn=" + s + " Data=" + csr.getString(csr.getColumnIndex(s)));
            }
        }
    }
}

11-24 19:20:02.182 4652-4652/? D/ACTIONSQL: Actioning CREATE TABLE tablea (_id INTEGER PRIMARY KEY, _name TEXT, _otherdata TEXT, _etc)
11-24 19:20:02.187 4652-4652/? D/ACTIONSQL: Actioning CREATE TABLE tableb (_id INTEGER PRIMARY KEY, _name TEXT, _otherdata TEXT, _etc)
11-24 19:20:02.191 4652-4652/? D/ACTIONSQL: Actioning CREATE TABLE tablec (_id INTEGER PRIMARY KEY, _name TEXT, _otherdata TEXT, _etc)
11-24 19:20:02.197 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tablea (_name,_otherdata, _etc) VALUES("Fred","Data for Fred","even more data for Fred.")
11-24 19:20:02.201 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tablea (_name,_otherdata, _etc) VALUES("Bert","Data for Bert","even more data for Bert.")
11-24 19:20:02.204 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tablea (_name,_otherdata, _etc) VALUES("Tom","Data for Tom","even more data for Tom.")
11-24 19:20:02.206 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tablea (_name,_otherdata, _etc) VALUES("Harry","Harry has this data.","Harry has even more data.")
11-24 19:20:02.209 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tableb (_name,_otherdata, _etc) VALUES("Fred","Data for Fred","even more data for Fred.")
11-24 19:20:02.213 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tableb (_name,_otherdata, _etc) VALUES("Bert","Data for Bert","even more data for Bert.")
11-24 19:20:02.216 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tableb (_name,_otherdata, _etc) VALUES("Tom","Data for Tom","even more data for Tom.")
11-24 19:20:02.219 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tableb (_name,_otherdata, _etc) VALUES("Harry","Harry has this data.","Harry has even more data.")
11-24 19:20:02.222 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tablec (_name,_otherdata, _etc) VALUES("Fred","Data for Fred","even more data for Fred.")
11-24 19:20:02.224 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tablec (_name,_otherdata, _etc) VALUES("Bert","Data for Bert","even more data for Bert.")
11-24 19:20:02.227 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tablec (_name,_otherdata, _etc) VALUES("Tom","Data for Tom","even more data for Tom.")
11-24 19:20:02.231 4652-4652/? D/ACTIONSQL: Actioning INSERT INTO tablec (_name,_otherdata, _etc) VALUES("Harry","Harry has this data.","Harry has even more data.")
11-24 19:20:02.235 4652-4652/? D/TABLEINFO: Row 0
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_id Data=1
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_name Data=Fred
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Data for Fred
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_etc Data=even more data for Fred.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO: Row 1
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_id Data=2
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_name Data=Bert
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Data for Bert
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_etc Data=even more data for Bert.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO: Row 2
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_id Data=3
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_name Data=Tom
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Data for Tom
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_etc Data=even more data for Tom.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO: Row 3
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_id Data=4
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_name Data=Harry
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Harry has this data.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_etc Data=Harry has even more data.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO: Row 0
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_id Data=1
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_name Data=Fred
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Data for Fred
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_etc Data=even more data for Fred.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO: Row 1
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_id Data=2
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_name Data=Bert
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Data for Bert
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_etc Data=even more data for Bert.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO: Row 2
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_id Data=3
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_name Data=Tom
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Data for Tom
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_etc Data=even more data for Tom.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO: Row 3
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_id Data=4
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_name Data=Harry
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Harry has this data.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO:     Column=_etc Data=Harry has even more data.
11-24 19:20:02.235 4652-4652/? D/TABLEINFO: Row 0
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_id Data=1
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_name Data=Fred
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Data for Fred
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_etc Data=even more data for Fred.
11-24 19:20:02.236 4652-4652/? D/TABLEINFO: Row 1
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_id Data=2
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_name Data=Bert
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Data for Bert
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_etc Data=even more data for Bert.
11-24 19:20:02.236 4652-4652/? D/TABLEINFO: Row 2
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_id Data=3
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_name Data=Tom
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Data for Tom
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_etc Data=even more data for Tom.
11-24 19:20:02.236 4652-4652/? D/TABLEINFO: Row 3
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_id Data=4
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_name Data=Harry
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_otherdata Data=Harry has this data.
11-24 19:20:02.236 4652-4652/? D/TABLEINFO:     Column=_etc Data=Harry has even more data.

11-24 19:20:20.605 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 0
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=1
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Fred
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Data for Fred
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=even more data for Fred.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 1
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=2
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Bert
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Data for Bert
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=even more data for Bert.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 2
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=3
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Tom
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Data for Tom
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=even more data for Tom.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 3
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=4
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Harry
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Harry has this data.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=Harry has even more data.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 0
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=1
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Fred
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Data for Fred
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=even more data for Fred.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 1
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=2
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Bert
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Data for Bert
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=even more data for Bert.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 2
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=3
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Tom
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Data for Tom
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=even more data for Tom.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 3
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=4
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Harry
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Harry has this data.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=Harry has even more data.
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 0
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=1
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Fred
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Data for Fred
11-24 19:20:20.606 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=even more data for Fred.
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 1
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=2
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Bert
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Data for Bert
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=even more data for Bert.
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 2
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=3
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Tom
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Data for Tom
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=even more data for Tom.
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO: Row 3
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_id Data=4
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_name Data=Harry
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_otherdata Data=Harry has this data.
11-24 19:20:20.607 4709-4709/mjt.importschemaanddata D/TABLEINFO:   Column=_etc Data=Harry has even more data.