Databases
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PO
 

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    <p>Just use:</p> <pre><code>SQLiteDatabase.openDatabase(DB_FULL_PATH, null, SQLiteDatabase.OPEN_READONLY); </code></pre> <p>where DB_FULL_PATH can be a path to your sdcard, like /sdcard/mydatabase.db</p> <p>Edit: </p> <p>This is what I call in my application to access the database....</p> <pre><code>private static DBUtil dbHelper = null; public void openDatabase() { if(dbHelper == null) { dbHelper = new DBUtil(this.context); dbHelper.openDataBase(SQLiteDatabase.OPEN_READWRITE); } } public void closeDatabase() { if(dbHelper != null) { dbHelper.close(); dbHelper = null; } } </code></pre> <p>... and this is the db helper class I'm using, which in fact extends SQLiteOpenHelper, so you will still have everything you want from this class.</p> <pre><code>package com.myapp.android.db; import android.content.Context; import android.database.SQLException; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteException; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log; import com.myapp.android.MyApp; import java.io.IOException; /** * Standard database utility class. * * TODO: Refactor. */ public class DBUtil extends SQLiteOpenHelper { /** * Database directory. * * &lt;p&gt; * Example: "/sdcard/myapp/db/" * &lt;/p&gt; */ public static String DB_DIRECTORY = null; /** * Name of the database file. * * &lt;p&gt; * Example: "mydatabase.db" * &lt;/p&gt; * */ public static String DB_NAME = null; /** * Full absolute path of the database. * * &lt;p&gt; * Example: "/sdcard/myapp/db/mydatabase.db" * &lt;/p&gt; */ public static String DB_FULL_PATH = null; static { DB_DIRECTORY = MyApp.DATA_REPOSITORY_URI + "/myapp/db/"; DB_NAME = "mydatabase.db"; DB_FULL_PATH = DB_DIRECTORY + DB_NAME; } private SQLiteDatabase myDataBase; /** * Constructor Takes and keeps a reference of the passed context in order to * access to the application assets and resources. * * @param context */ public DBUtil(Context context) { super(context, DB_NAME, null, 1); try { this.createDataBase(); } catch (IOException ioe) { throw new Error("Unable to create database"); } } /** * Creates a empty database on the system and rewrites it with your own * database. * */ public void createDataBase() throws IOException { if (!checkDataBase()) this.getWritableDatabase(); } /** * 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 */ private boolean checkDataBase() { SQLiteDatabase checkDB = null; try { checkDB = SQLiteDatabase.openDatabase(DB_FULL_PATH, null, SQLiteDatabase.OPEN_READONLY); } catch (SQLiteException e) { // database does't exist yet. } if (checkDB != null) { checkDB.close(); } return checkDB != null ? true : false; } public void openDataBase(int mode) throws SQLException { try { myDataBase = SQLiteDatabase.openDatabase(DB_FULL_PATH, null, mode); } catch(IllegalStateException e) { // Sometimes, esp. after application upgrade, the database will be non-closed, raising a IllegalStateException // below. Try to avoid by simply opening it again. Log.d(MyApp.APP, "Database non-closed. Reopening."); myDataBase = SQLiteDatabase.openDatabase(DB_FULL_PATH, null, mode); } } public void openDataBase() throws SQLException { openDataBase(SQLiteDatabase.OPEN_READWRITE); } public SQLiteDatabase getDb() { return myDataBase; } @Override public synchronized void close() { if (myDataBase != null) myDataBase.close(); super.close(); } @Override public void onCreate(SQLiteDatabase db) { } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } } </code></pre>
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    1. POIs it possible to move the internal DB to the SDCard?
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    1. USMathias Conradt
    1. USMathias Conradt
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    1. POIs it possible to move the internal DB to the SDCard?
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    1. COI am not certain this can be used in conjunction with SQLiteOpenHelper . Unfortunately I'm not at my workspace right now and can't test. Will vote up if it's as simple as that, though.
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    2. COWondering, why do you explicitly need SQLiteOpenHelper?
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    3. COIt has a bunch of helper methods for database creation and database upgrades. I'm not familiar with a simpler way of handling those actions.
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