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私の問題は、私は5つのテーブルがあり、挿入と選択が必要です。5つのテーブルと挿入と選択を持つデータベース
私がやったことはすべてのテーブルクラスのためのものであり、そこに私は私は私は非常に多く見つかっ
public class DBAdapter {
public static final String DB_NAME = "mol.db";
private static final int DB_VERSION = 1;
private static final String TAG = "DBAdapter"; //to log
private final Context context;
private SQLiteDatabase db;
public DBAdapter(Context context)
{
this.context = context;
OpenHelper openHelper = new OpenHelper(this.context);
this.db = openHelper.getWritableDatabase();
}
public static class OpenHelper extends SQLiteOpenHelper
{
public OpenHelper(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
db.execSQL(Contact.SQL_CREATE);
db.execSQL(Country.SQL_CREATE);
db.execSQL(Picture.SQL_CREATE);
db.execSQL(Product.SQL_CREATE);
db.execSQL(Project.SQL_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
Log.w(TAG, "Upgrading database from version "
+ oldVersion + " to " + newVersion
+ ", which will destroy all old data");
db.execSQL(Contact.SQL_DROP);
db.execSQL(Country.SQL_DROP);
db.execSQL(Picture.SQL_DROP);
db.execSQL(Product.SQL_DROP);
db.execSQL(Project.SQL_DROP);
onCreate(db);
}
データベースを作成したがDBAdapterクラスを持っているこの
public class Contact
private static String IDCont = "id_contact";
private static String NameCont = "name_contact";
private static String StreetCont = "street_contact";
private static String Street2Cont = "street2_contact";
private static String Street3Cont = "street3_contact";
private static String ZipCont = "zip_contact";
private static String CityCont = "city_contact";
private static String CountryCont = "country_contact";
private static String Iso2Cont = "iso2_contact";
private static String PhoneCont = "phone_contact";
private static String Phone2Cont = "phone2_contact";
private static String FaxCont = "fax_contact";
private static String MailCont = "mail_contact";
private static String Mail2Cont = "mail2_contact";
private static String InternetCont = "internet_contact";
private static String DrivemapCont = "drivemap_contact";
private static String PictureCont = "picture_contact";
private static String LatitudeCont = "latitude_contact";
private static String LongitudeCont = "longitude_contact";
public static final String TABLE_NAME = "contact";
public static final String SQL_CREATE = "CREATE TABLE IF NOT EXISTS " + TABLE_NAME + "(" +
IDCont + "INTEGER not NULL," +
NameCont + " TEXT not NULL," +
StreetCont + " TEXT," +
Street2Cont + " TEXT," +
Street3Cont + " TEXT," +
ZipCont + " TEXT," +
CityCont + " TEXT," +
CountryCont + " TEXT," +
Iso2Cont + " TEXT," +
PhoneCont + " TEXT," +
Phone2Cont + " TEXT," +
FaxCont + " TEXT," +
MailCont + " TEXT," +
Mail2Cont + " TEXT," +
InternetCont + " TEXT," + //website of the contact
DrivemapCont + " TEXT," + //a link to a drivemap to the contact
PictureCont + " TEXT," + //a photo of the contact building (contact is not a person)
LatitudeCont + " TEXT," +
LongitudeCont + " TEXT," +
"primary key(id_contact)" +
"foreign key(iso2)";
and my insert looks like this
public boolean SQL_INSERT_CONTACT(int IDContIns, String NameContIns, String StreetContIns,
String Street2ContIns, String Street3ContIns, String ZipContIns,
String CityContIns, String CountryContIns, String Iso2ContIns,
String PhoneContIns, String Phone2ContIns, String FaxContIns,
String MailContIns, String Mail2ContIns, String InternetContIns,
String DrivemapContIns, String PictureContIns, String LatitudeContIns,
String LongitudeContIns) {
try{
db.execSQL("INSERT INTO " + "contact" +
"(" + IDCont + ", " + NameCont + ", " + StreetCont + ", " +
Street2Cont + ", " + Street3Cont + ", " + ZipCont + ", " +
CityCont + ", " + CountryCont + ", " + Iso2Cont + ", " +
PhoneCont + ", " + Phone2Cont + ", " + FaxCont + ", " +
MailCont + ", " + Mail2Cont + ", " + InternetCont + ", " +
DrivemapCont + ", " + PictureCont + ", " + LatitudeCont + ", " +
LongitudeCont + ") " +
"VALUES (" + IDContIns + ", " + NameContIns +", " + StreetContIns + ", " +
Street2ContIns + ", " + Street3ContIns + ", " + ZipContIns + ", " +
CityContIns + ", " + CountryContIns + ", " + Iso2ContIns + ", " +
PhoneContIns + ", " + Phone2ContIns + ", " + FaxContIns + ", " +
MailContIns + ", " + Mail2ContIns + ", " + InternetContIns + ", " +
DrivemapContIns + ", " + PictureContIns + ", " + LatitudeContIns + ", " +
LongitudeContIns +")");
return true;
}
catch (SQLException e) {
return false;
}
}
のようなSQL文を書きました別のものを試してみましたが、私は仕事をすることができませんでした。 私は自分のアクティビティでデータベースにアクセスするにはどうすればいいですか？ と私はどのように動作するように挿入するのですか？ そして、 ？私はそれだけで3列
public class Country {
private static String Iso2Count = "iso2_country";
private static String NameCount = "name_country";
private static String FlagCount = "flag_image_url_country";
public static final String TABLE_NAME = "country";
public static final String SQL_CREATE = "CREATE TABLE IF NOT EXISTS " + TABLE_NAME + "(" +
Iso2Count + " TEXT not NULL," +
NameCount + " TEXT not NULL," +
FlagCount + " TEXT not NULL," +
"primary key(iso2_country)";
public boolean SQL_INSERT_COUNTRY(String Iso2CountIns, String NameCountIns, String FlagCountIns) {
try{
db.execSQL("INSERT INTO " + "country" +
"(" + Iso2Count + ", " + NameCount + ", " + FlagCount + ") " +
"VALUES (" + Iso2CountIns + ", " + NameCountIns +", " + FlagCountIns + ")");
return true;
}
catch (SQLException e) {
return false;
}
}
public class MainTabActivity extends TabActivity {
private Context context;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.maintabactivity);
TabHost mTabHost = getTabHost();
Intent intent1 = new Intent().setClass(this,MapOfLight.class);
//Intent intent2 = new Intent().setClass(this,Test.class); //Testactivity
//Intent intent2 = new Intent().setClass(this,DetailView.class); //DetailView
Intent intent2 = new Intent().setClass(this,ObjectList.class); //ObjectList
//Intent intent2 = new Intent().setClass(this,Gallery.class); //Gallery
Intent intent3 = new Intent().setClass(this,ContactDetail.class);
mTabHost.addTab(mTabHost.newTabSpec("tab_mol").setIndicator(this.getText(R.string.mol), getResources().getDrawable(R.drawable.ic_tab_mol)).setContent(intent1));
mTabHost.addTab(mTabHost.newTabSpec("tab_highlights").setIndicator(this.getText(R.string.highlights),getResources().getDrawable(R.drawable.ic_tab_highlights)).setContent(intent2));
mTabHost.addTab(mTabHost.newTabSpec("tab_contacts").setIndicator(this.getText(R.string.contact),getResources().getDrawable(R.drawable.ic_tab_contact)).setContent(intent3));
mTabHost.setCurrentTab(1);
SQLiteDatabase db;
DBAdapter dh = null;
OpenHelper openHelper = new OpenHelper(this.context);
dh = new DBAdapter(this);
db = openHelper.getWritableDatabase();
dh.SQL_INSERT_COUNTRY("AT", "Austria", "AUT");
}
}
を試してみましたか あなたの助けに感謝
のthats
もう一つの質問は、挿入を入れて、別のクラスに各テーブルから選択する方が良いです、私は各テーブルの1クラスを持っているか、DBAdapterクラス？
どうしたらうまくいかないのですか？何かエラーがありますか？何か？ –
あなたの正確な問題を明記してください。 DBに接続できません。 INSERTは失敗しますか？ ...関連するエラーメッセージを表示することを忘れないでください。 –
強制的に強制終了するエラーメッセージは表示されません。 – kirbby