错误这一行：
mDataBase = SQLiteDatabase.openDatabase(dbPath, "123", null, SQLiteDatabase.NO_LOCALIZED_COLLATORS);
打开数据库时。但怎么了？如何用密码打开数据库？谁能帮我？
- 我在 SQLITE Db Browser > File> Set encryption 上设置密码
- 在android部分打开这个密码
- 打开时显示错误
error : net.sqlcipher.database.SQLiteException: file is not a database: , while compiling: select count(*) from sqlite_master
任何人都可以帮我解决它吗？提前致谢
import android.content.Context;
import android.database.SQLException;
//import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import net.sqlcipher.database.SQLiteDatabase;
import net.sqlcipher.database.SQLiteDatabase;
import net.sqlcipher.database.SQLiteOpenHelper;
import net.sqlcipher.database.SQLiteDatabase.CursorFactory;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.File;
import net.sqlcipher.database.SQLiteDatabase;
import android.app.Activity;
import android.os.Bundle;
public class DatabaseHelper extends SQLiteOpenHelper {
private static String TAG = DatabaseHelper.class.getName();
private static String DB_PATH = "";
private static String DB_NAME = "ec.db";// Database name
private SQLiteDatabase mDataBase;
private final Context mContext;
File databaseFile=null;
public DatabaseHelper(Context context) {
super(context, DB_NAME, null, 1);
DB_PATH = context.getApplicationInfo().dataDir + "/databases/";
this.mContext = context;
SQLiteDatabase.loadLibs(context);
File databaseFile = context.getDatabasePath(DB_NAME);
databaseFile.mkdirs();
}
public void createDataBase() throws IOException {
// If database not exists copy it from the assets
boolean mDataBaseExist = checkDataBase();
if (!mDataBaseExist) {
this.getWritableDatabase("123");
this.close();
try {
// Copy the database from assests
copyDataBase();
Log.e(TAG, "createDatabase database created");
} catch (IOException mIOException) {
throw new Error(mIOException.toString() + " : " + DB_PATH
+ DB_NAME);// "ErrorCopyingDataBase"
}
}
}
private boolean checkDataBase() {
File dbFile = new File(DB_PATH + DB_NAME);
return dbFile.exists();
}
// Copy the database from assets
private void copyDataBase() throws IOException {
InputStream mInput = mContext.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
OutputStream mOutput = new FileOutputStream(outFileName);
byte[] mBuffer = new byte[4096];
int mLength;
while ((mLength = mInput.read(mBuffer)) > 0) {
mOutput.write(mBuffer, 0, mLength);
}
mOutput.flush();
mOutput.close();
mInput.close();
}
// Open the database, so we can query it
public boolean openDataBase() throws SQLException {
String mPath = DB_PATH + DB_NAME;
//File dbFile = new File(DB_PATH + DB_NAME);
//File databaseFile = mContext.getDatabasePath(DB_NAME);
//databaseFile.mkdirs();
//databaseFile.delete();
SQLiteDatabase.loadLibs(mContext);
String dbPath = mContext.getDatabasePath("ec.db").getPath();
//databaseFile.delete();
SQLiteDatabase.loadLibs(mContext);
//mDataBase = SQLiteDatabase.openOrCreateDatabase(databaseFile, "123", null);
//mDataBase = SQLiteDatabase.openDatabase(mPath, "123",null, SQLiteDatabase.NO_LOCALIZED_COLLATORS);
mDataBase = SQLiteDatabase.openDatabase(dbPath, "123", null, SQLiteDatabase.NO_LOCALIZED_COLLATORS);
return mDataBase != null;
}
@Override
public synchronized void close() {
if (mDataBase != null)
mDataBase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}