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我使用此代码将我的sqlite数据库从“Assets”目录复制到Android手机“/ data/data/my_packname/databases /”目录。使用我自己的sqlite数据库的问题
public class DataBaseHelper extends SQLiteOpenHelper{
private SQLiteDatabase myDataBase;
private final Context myContext;
public DataBaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
this.myContext = context;
}
...
private void copyDataBase() throws IOException{
//Open your local db as the input stream
AssetManager am = this.myContext.getAssets();
InputStream myInput = am.open(DATABASE_NAME);
// Path to the just created empty db
String outFileName = DATABASE_PATH + DATABASE_NAME;
//Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
//transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer)) > 0){
myOutput.write(buffer, 0, length);
}
//Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
...
}
但行
while ((length = myInput.read(buffer)) > 0){
我有IOException异常!
谁能告诉我我做错了什么?
看看你是否可以纠正你的格式,并显示您的数据库名称是什么。还要设置一个中断点,看看你的myimput是否打开了它看起来没有的文件。可能拼写错误或路径不正确。 – Emile 2011-01-13 14:18:02