Question
As I'm working with many tables in my Android application, I decide to create database(DB) in SQLite managers (such as firefox plugin or navicat for sqlite). I finished creating them and export the .sql file ! but I don't know how to use this file! Of course I found some post about this to put DB (on a rooted phone) in ...data/data/{your package name}/ ..etc but I don't understand what to do after this step!! (I know the code for introducing the db to the android app only!!)
Can anyone tell me step by step How to use my created db with these methods in my Application??-
Is it good way to use these SQLite managers or despite of being complicated to create multi tables in android with codes, you prefer it???
What is the main differense between sqlite 2 and 3? Are they supported by different Android version or only updates for Sqlite?
Edit: After copying the dB into assest folder and using the code for copying it:
https://stackoverflow.com/questions/15391066
italiano
english
français
española
中国
日本の
العربية
Deutsch
한국어
Português
Russian
03-16 11:32:20.370: I/SqliteDatabaseCpp(3999): sqlite returned: error code = 14, msg = cannot open file at line 27712 of [8609a15dfa], db=/data/data/com.androidhive.xmlparsing/databases/surveydb.sqlite
03-16 11:32:20.370: I/SqliteDatabaseCpp(3999): sqlite returned: error code = 14, msg = os_unix.c: open() at line 27712 - "" errno=2 path=/data/data/com.androidhive.xmlparsing/databases/surveydb.sqlite, db=/data/data/com.androidhive.xmlparsing/databases/surveydb.sqlite
03-16 11:32:20.370: E/SqliteDatabaseCpp(3999): sqlite3_open_v2("/data/data/com.androidhive.xmlparsing/databases/surveydb.sqlite", &handle, 1, NULL) failed
03-16 11:32:20.380: E/SQLiteDatabase(3999): Failed to open the database. closing it.
03-16 11:32:20.380: E/SQLiteDatabase(3999): android.database.sqlite.SQLiteCantOpenDatabaseException: unable to open database file
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.database.sqlite.SQLiteDatabase.dbopen(Native Method)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:983)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:956)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:932)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at database.AssetDatabaseHelper.checkExist(AssetDatabaseHelper.java:55)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at database.AssetDatabaseHelper.importIfNotExist(AssetDatabaseHelper.java:81)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at com.androidhive.xmlparsing.AndroidXMLParsingActivity.onCreate(AndroidXMLParsingActivity.java:78)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1050)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1782)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1834)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.app.ActivityThread.access$500(ActivityThread.java:122)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1027)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.os.Handler.dispatchMessage(Handler.java:99)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.os.Looper.loop(Looper.java:132)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at android.app.ActivityThread.main(ActivityThread.java:4126)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at java.lang.reflect.Method.invokeNative(Native Method)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at java.lang.reflect.Method.invoke(Method.java:491)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
03-16 11:32:20.380: E/SQLiteDatabase(3999): at dalvik.system.NativeStart.main(Native Method)
03-16 11:32:20.380: W/System.err(3999): android.database.sqlite.SQLiteCantOpenDatabaseException: unable to open database file
03-16 11:32:20.380: W/System.err(3999): at android.database.sqlite.SQLiteDatabase.dbopen(Native Method)
03-16 11:32:20.380: W/System.err(3999): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:983)
03-16 11:32:20.380: W/System.err(3999): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:956)
03-16 11:32:20.380: W/System.err(3999): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:932)
03-16 11:32:20.380: W/System.err(3999): at database.AssetDatabaseHelper.checkExist(AssetDatabaseHelper.java:55)
03-16 11:32:20.380: W/System.err(3999): at database.AssetDatabaseHelper.importIfNotExist(AssetDatabaseHelper.java:81)
03-16 11:32:20.380: W/System.err(3999): at com.androidhive.xmlparsing.AndroidXMLParsingActivity.onCreate(AndroidXMLParsingActivity.java:78)
03-16 11:32:20.380: W/System.err(3999): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1050)
03-16 11:32:20.380: W/System.err(3999): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1782)
03-16 11:32:20.380: W/System.err(3999): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1834)
03-16 11:32:20.380: W/System.err(3999): at android.app.ActivityThread.access$500(ActivityThread.java:122)
03-16 11:32:20.380: W/System.err(3999): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1027)
03-16 11:32:20.380: W/System.err(3999): at android.os.Handler.dispatchMessage(Handler.java:99)
03-16 11:32:20.380: W/System.err(3999): at android.os.Looper.loop(Looper.java:132)
03-16 11:32:20.380: W/System.err(3999): at android.app.ActivityThread.main(ActivityThread.java:4126)
03-16 11:32:20.380: W/System.err(3999): at java.lang.reflect.Method.invokeNative(Native Method)
03-16 11:32:20.380: W/System.err(3999): at java.lang.reflect.Method.invoke(Method.java:491)
03-16 11:32:20.380: W/System.err(3999): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:844)
03-16 11:32:20.380: W/System.err(3999): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
03-16 11:32:20.380: W/System.err(3999): at dalvik.system.NativeStart.main(Native Method)
I used this code:
public class AssetDatabaseHelper extends SQLiteOpenHelper{
private String dbName;
private String db_path;
private Context context;
/**
* A helpe r class to import db files.
*
* @param context
* base/app context
* @param dbName
* The name of the db in asset folder .
*/
public AssetDatabaseHelper(Context context, String dbName) {
super(context, dbName, null, 1);
this.dbName = dbName;
this.context = context;
db_path = "/data/data/" + context.getPackageName() + "/databases/";
}
/**
* Check if the database already exist to avoid re-copying the file each
* time you open the application.
*
* @return true if it exists, false if it doesn't
*/
public boolean checkExist() {
SQLiteDatabase checkDB = null;
try {
String myPath = db_path + dbName;
checkDB = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READONLY);
} catch (SQLiteException e) {
e.printStackTrace();
} catch (Exception ep) {
ep.printStackTrace();
}
if (checkDB != null) {
checkDB.close();
}
return checkDB != null ? true : false;
}
/**
* Creates a empty database on the system and rewrites it with your own
* database.
* */
public void importIfNotExist() throws IOException {
boolean dbExist = checkExist();
if (dbExist) {
// do nothing - database already exist
} else {
this.getReadableDatabase();
try {
copyDatabase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
/**
* Creates copies the database from asset to the new database location.
* */
private void copyDatabase() throws IOException {
InputStream is = context.getAssets().open(dbName);
OutputStream os = new FileOutputStream(db_path + dbName);
byte[] buffer = new byte[4096];
int length;
while ((length = is.read(buffer)) > 0) {
os.write(buffer, 0, length);
}
os.flush();
os.close();
is.close();
this.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}
UpdATE 2: db sCRIPTS:
CREATE TABLE "**" ("_id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "**" TEXT, "****" INTEGER);
CREATE TABLE "***" ("_id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "***" INTEGER UNIQUE , "***" TEXT);
CREATE TABLE "**" ("_id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "***" INTEGER UNIQUE , "**" INTEGER, "**" INTEGER, "**" TEXT, "impGender" TEXT, "**" TEXT, "***" INTEGER, "***" DATETIME DEFAULT CURRENT_TIMESTAMP);
CREATE TABLE "**" ("_id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "**" TEXT);
CREATE TABLE "**" ("_id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "***" INTEGER UNIQUE , "***" TEXT, "srQType" INTEGER, "***" INTEGER, "**" BOOL, "**" FLOAT, "**" FLOAT, "**" INTEGER, "**" UNIQUE );
CREATE TABLE "*" ("_id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "**" INTEGER NOT NULL UNIQUE , "***" INTEGER, "**" INTEGER, "**" INTEGER, "**" INTEGER, "**" TEXT, "**" TEXT);
CREATE TABLE "**" ("_id" INTEGER PRIMARY KEY, "***" TEXT);
CREATE TABLE "**" ("_id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL , "**" TEXT, "srDesc" TEXT, "***" INTEGER, "**" DATETIME, "**" DATETIME, "****" INTEGER, "srCode" INTEGER);
CREATE TABLE "android_metadata" ("locale" TEXT DEFAULT 'en_US');
And at the end:
new AssetDatabaseHelper(this , "surveydb.sqlite").importIfNotExist();
what is the problem?
Can you help me?
Solution
Steps to use imported database:
Import your database by executing the code below.
AssetDatabaseHelper dbHelper = new AssetDatabaseHelper(
getBaseContext(), YOUR_DATABASE_NAME);
try {
dbHelper.importIfNotExist();
} catch (IOException e) {
e.printStackTrace();
}
