Forked from wontondon/AssetDatabaseOpenHelper.java
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August 29, 2015 14:24
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package com.javatarts.basketballgm.data; | |
import java.io.File; | |
import java.io.FileOutputStream; | |
import java.io.IOException; | |
import java.io.InputStream; | |
import java.io.OutputStream; | |
import android.content.Context; | |
import android.database.sqlite.SQLiteDatabase; | |
public class AssetDatabaseOpenHelper { | |
private static final String DB_NAME = "asset.db"; | |
private Context context; | |
public AssetDatabaseOpenHelper(Context context) { | |
this.context = context; | |
} | |
public SQLiteDatabase openDatabase() { | |
File dbFile = context.getDatabasePath(DB_NAME); | |
if (!dbFile.exists()) { | |
try { | |
copyDatabase(dbFile); | |
} catch (IOException e) { | |
throw new RuntimeException("Error creating source database", e); | |
} | |
} | |
return SQLiteDatabase.openDatabase(dbFile.getPath(), null, SQLiteDatabase.OPEN_READONLY); | |
} | |
private void copyDatabase(File dbFile) throws IOException { | |
InputStream is = context.getAssets().open(DB_NAME); | |
OutputStream os = new FileOutputStream(dbFile); | |
byte[] buffer = new byte[1024]; | |
while (is.read(buffer) > 0) { | |
os.write(buffer); | |
} | |
os.flush(); | |
os.close(); | |
is.close(); | |
} | |
} |
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