#25 Test of SQLite storage on DESKTOP and ANDROID app types

build.gradle

@@ -33,6 +33,8 @@ allprojects {
         box2DLightsVersion = '1.3'
         ashleyVersion = '1.3.1'
         aiVersion = '1.4.0'
+        sqlDroidVersion = '1.0.3'
+        sqlLiteJdbcVersion = '3.8.10.1'
     }
 
     repositories {
@@ -99,6 +101,7 @@ project(":android") {
         compile "com.badlogicgames.gdx:gdx-backend-android:$gdxVersion"
 	    compile "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
 	    compile "net.engio:mbassador:$mbassadorVersion"
+        compile "org.sqldroid:sqldroid:$sqlDroidVersion"
 	    natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-armeabi"
 	    natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-armeabi-v7a"
 	    natives "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-x86"
@@ -154,6 +157,7 @@ project(":core") {
 		compile "net.dermetfan.libgdx-utils:libgdx-utils:$gdxUtilsVersion"
 	    compile "net.engio:mbassador:$mbassadorVersion"
 	    compile "com.badlogicgames.gdx:gdx-freetype:$gdxVersion"
+        compile "org.xerial:sqlite-jdbc:$sqlLiteJdbcVersion"
 
 		testCompile "junit:junit:4.11"
 		testCompile "com.badlogicgames.gdx:gdx-backend-headless:$gdxVersion"               

core/src/cz/nic/tablexia/Tablexia.java

@@ -16,6 +16,7 @@ import cz.nic.tablexia.loader.application.ApplicationTextManager;
 import cz.nic.tablexia.loader.application.ApplicationTextureManager;
 import cz.nic.tablexia.loader.zip.ZipAssetLoader;
 import cz.nic.tablexia.menu.MainMenuContainer;
+import cz.nic.tablexia.persist.SqliteStorage;
 import cz.nic.tablexia.screen.AbstractTablexiaScreen;
 import cz.nic.tablexia.screen.loader.LoaderScreen;
 import cz.nic.tablexia.util.Log;
@@ -120,6 +121,8 @@ public class Tablexia extends TablexiaApplication {
 		// init event bus handlers
 		ApplicationBus.getInstance().subscribe(this);
 
+        SqliteStorage.storageTest();
+
         // start loading application scope data
         startLoading(TablexiaSettings.getInstance().getLocale());
     }

core/src/cz/nic/tablexia/persist/SqliteStorage.java

+package cz.nic.tablexia.persist;
+
+import com.badlogic.gdx.Application;
+import com.badlogic.gdx.Gdx;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import cz.nic.tablexia.loader.TablexiaAssetManager;
+import cz.nic.tablexia.util.Log;
+
+/**
+ * Created by matyas on 18.5.15.
+ */
+public class SqliteStorage {
+
+    private enum SQLDriverType {
+
+        DESKTOP(Application.ApplicationType.Desktop, "org.sqlite.JDBC", "jdbc:sqlite:"),
+        ANDROID(Application.ApplicationType.Android, "org.sqldroid.SQLDroidDriver", "jdbc:sqldroid:");
+
+        private Application.ApplicationType applicationType;
+        private String driverName;
+        private String databaseConnection;
+
+        SQLDriverType(Application.ApplicationType applicationType, String driverName, String databaseConnection) {
+            this.applicationType = applicationType;
+            this.driverName = driverName;
+            this.databaseConnection = databaseConnection;
+        }
+
+        public static String getDriverNameForApplicationType(Application.ApplicationType applicationType) {
+            for (SQLDriverType driverType : SQLDriverType.values()) {
+                if (driverType.applicationType == applicationType) {
+                    return driverType.driverName;
+                }
+            }
+            return null;
+        }
+
+        public static String getDatabseConnectionForApplicationType(Application.ApplicationType applicationType) {
+            for (SQLDriverType driverType : SQLDriverType.values()) {
+                if (driverType.applicationType == applicationType) {
+                    return driverType.databaseConnection;
+                }
+            }
+            return null;
+        }
+    }
+
+    public static void storageTest() {
+
+
+
+        Log.debug(SqliteStorage.class, "------->> POKUS");
+
+        String dbDirectory = Gdx.files.getExternalStoragePath() + TablexiaAssetManager.StorageType.EXTERNAL.getStoragePath();
+        String dbFileName = "tablexia.db";
+        String dbPath = dbDirectory + "/" + dbFileName;
+
+        // load the sqlite-JDBC driver using the current class loader
+        try {
+            //Class.forName("org.sqlite.JDBC");
+            Class.forName(SQLDriverType.getDriverNameForApplicationType(Gdx.app.getType()));
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+
+        Connection connection = null;
+        try
+        {
+            // create a database connection
+            connection = DriverManager.getConnection(SQLDriverType.getDatabseConnectionForApplicationType(Gdx.app.getType()) + dbPath);
+            Statement statement = connection.createStatement();
+            //statement.setQueryTimeout(30);  // set timeout to 30 sec.
+
+            Log.debug(SqliteStorage.class, "------->> POKUS2");
+
+            statement.executeUpdate("drop table if exists person");
+            statement.executeUpdate("create table person (id integer, name string)");
+            statement.executeUpdate("insert into person values(1, 'leo')");
+            statement.executeUpdate("insert into person values(2, 'yui')");
+            ResultSet rs = statement.executeQuery("select * from person");
+            while(rs.next())
+            {
+                // read the result set
+                System.out.println("name = " + rs.getString("name"));
+                System.out.println("id = " + rs.getInt("id"));
+            }
+        }
+        catch(SQLException e)
+        {
+            // if the error message is "out of memory",
+            // it probably means no database file is found
+            e.printStackTrace();
+        }
+        finally
+        {
+            Log.debug(SqliteStorage.class, "------->> POKUS3");
+            try
+            {
+                if(connection != null)
+                    connection.close();
+            }
+            catch(SQLException e)
+            {
+                // connection close failed.
+                System.err.println(e);
+            }
+        }
+    }
+}