我试图从我的数据库中读取但是我收到了这些错误。我的数据库位于assets文件夹中。我已经下载了AnyDBAdapter类，只是尝试使用一个简单的select函数..
02-18 14:18:24.168: E/SQLiteLog(964): (14) cannot open file at line 30176 of [00bb9c9ce4]
02-18 14:18:24.168: E/SQLiteLog(964): (14) os_unix.c:30176: (2) open(/data/data/com.onlywithalcohol.mk/databases/Alcohol_DB) -
02-18 14:18:24.387: E/SQLiteDatabase(964): Failed to open database '/data/data/com.onlywithalcohol.mk/databases/Alcohol_DB'.
02-18 14:18:24.387: E/SQLiteDatabase(964): android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:209)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:669)
02-18 14:18:24.387: E/SQLiteDatabase(964): at com.onlywithalcohol.mk.AnyDBAdapter$DatabaseHelper.checkDataBase(AnyDBAdapter.java:150)
02-18 14:18:24.387: E/SQLiteDatabase(964): at com.onlywithalcohol.mk.AnyDBAdapter$DatabaseHelper.createDataBase(AnyDBAdapter.java:119)
02-18 14:18:24.387: E/SQLiteDatabase(964): at com.onlywithalcohol.mk.AnyDBAdapter.open(AnyDBAdapter.java:47)
02-18 14:18:24.387: E/SQLiteDatabase(964): at com.onlywithalcohol.mk.Main$1.onClick(Main.java:30)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.view.View.performClick(View.java:4202)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.view.View$PerformClick.run(View.java:17340)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.os.Handler.handleCallback(Handler.java:725)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.os.Handler.dispatchMessage(Handler.java:92)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.os.Looper.loop(Looper.java:137)
02-18 14:18:24.387: E/SQLiteDatabase(964): at android.app.ActivityThread.main(ActivityThread.java:5039)
02-18 14:18:24.387: E/SQLiteDatabase(964): at java.lang.reflect.Method.invokeNative(Native Method)
02-18 14:18:24.387: E/SQLiteDatabase(964): at java.lang.reflect.Method.invoke(Method.java:511)
02-18 14:18:24.387: E/SQLiteDatabase(964): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
02-18 14:18:24.387: E/SQLiteDatabase(964): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
02-18 14:18:24.387: E/SQLiteDatabase(964): at dalvik.system.NativeStart.main(Native Method)
02-18 14:18:24.648: D/AndroidRuntime(964): Shutting down VM
02-18 14:18:24.648: W/dalvikvm(964): threadid=1: thread exiting with uncaught exception (group=0x40a70930)
02-18 14:18:24.748: E/AndroidRuntime(964): FATAL EXCEPTION: main
02-18 14:18:24.748: E/AndroidRuntime(964): java.lang.Error: Error copying database
02-18 14:18:24.748: E/AndroidRuntime(964): at com.onlywithalcohol.mk.AnyDBAdapter$DatabaseHelper.createDataBase(AnyDBAdapter.java:135)
02-18 14:18:24.748: E/AndroidRuntime(964): at com.onlywithalcohol.mk.AnyDBAdapter.open(AnyDBAdapter.java:47)
02-18 14:18:24.748: E/AndroidRuntime(964): at com.onlywithalcohol.mk.Main$1.onClick(Main.java:30)
02-18 14:18:24.748: E/AndroidRuntime(964): at android.view.View.performClick(View.java:4202)
02-18 14:18:24.748: E/AndroidRuntime(964): at android.view.View$PerformClick.run(View.java:17340)
02-18 14:18:24.748: E/AndroidRuntime(964): at android.os.Handler.handleCallback(Handler.java:725)
02-18 14:18:24.748: E/AndroidRuntime(964): at android.os.Handler.dispatchMessage(Handler.java:92)
02-18 14:18:24.748: E/AndroidRuntime(964): at android.os.Looper.loop(Looper.java:137)
02-18 14:18:24.748: E/AndroidRuntime(964): at android.app.ActivityThread.main(ActivityThread.java:5039)
02-18 14:18:24.748: E/AndroidRuntime(964): at java.lang.reflect.Method.invokeNative(Native Method)
02-18 14:18:24.748: E/AndroidRuntime(964): at java.lang.reflect.Method.invoke(Method.java:511)
02-18 14:18:24.748: E/AndroidRuntime(964): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
02-18 14:18:24.748: E/AndroidRuntime(964): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
02-18 14:18:24.748: E/AndroidRuntime(964): at dalvik.system.NativeStart.main(Native Method)
这是我的AnyDBAdapter类：
package com.onlywithalcohol.mk;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class AnyDBAdapter {
private static final String TAG = "AnyDBAdapter";
private DatabaseHelper mDbHelper;
private static SQLiteDatabase mDb;
//make sure this matches the
//package com.MyPackage;
//at the top of this file
private static String DB_PATH = "/data/data/com.onlywithalcohol.mk/databases/";
//make sure this matches your database name in your assets folder
// my database file does not have an extension on it
// if yours does
// add the extention
private static final String DATABASE_NAME = "Alcohol_DB";
//Im using an sqlite3 database, I have no clue if this makes a difference or not
private static final int DATABASE_VERSION = 3;
private final Context adapterContext;
public AnyDBAdapter(Context context) {
this.adapterContext = context;
}
public AnyDBAdapter open() throws SQLException {
mDbHelper = new DatabaseHelper(adapterContext);
try {
mDbHelper.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
try {
mDbHelper.openDataBase();
} catch (SQLException sqle) {
throw sqle;
}
return this;
}
public Cursor selectRecord(int id){
Cursor c = mDb.rawQuery("SELECT title FROM alcorecords"
+ " WHERE id ='"+id+"'", null);
return c;
}
//Usage from outside
// AnyDBAdapter dba = new AnyDBAdapter(contextObject); //in my case contextObject is a Map
// dba.open();
// Cursor c = dba.ExampleSelect("Rawr!");
// contextObject.startManagingCursor(c);
// String s1 = "", s2 = "";
// if(c.moveToFirst())
// do {
// s1 = c.getString(0);
// s2 = c.getString(1);
// } while (c.moveToNext());
// dba.close();
public Cursor ExampleSelect(String myVariable)
{
String query = "SELECT locale, ? FROM android_metadata";
return mDb.rawQuery(query, new String[]{myVariable});
}
//Usage
// AnyDBAdatper dba = new AnyDBAdapter(contextObjecT);
// dba.open();
// dba.ExampleCommand("en-CA", "en-GB");
// dba.close();
public void ExampleCommand(String myVariable1, String myVariable2)
{
String command = "INSERT INTO android_metadata (locale) SELECT ? UNION ALL SELECT ?";
mDb.execSQL(command, new String[]{ myVariable1, myVariable2});
}
public void close() {
mDbHelper.close();
}
private static class DatabaseHelper extends SQLiteOpenHelper {
Context helperContext;
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
helperContext = context;
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database!!!!!");
//db.execSQL("");
onCreate(db);
}
public void createDataBase() throws IOException {
boolean dbExist = checkDataBase();
if (dbExist) {
} else {
//make sure your database has this table already created in it
//this does not actually work here
/*
* db.execSQL("CREATE TABLE IF NOT EXISTS \"android_metadata\" (\"locale\" TEXT DEFAULT 'en_US')"
* );
* db.execSQL("INSERT INTO \"android_metadata\" VALUES ('en_US')"
* );
*/
this.getReadableDatabase();
try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
public SQLiteDatabase getDatabase() {
String myPath = DB_PATH + DATABASE_NAME;
return SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READONLY);
}
private boolean checkDataBase() {
SQLiteDatabase checkDB = null;
try {
String myPath = DB_PATH + DATABASE_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READONLY);
} catch (SQLiteException e) {
}
if (checkDB != null) {
checkDB.close();
}
return checkDB != null ? true : false;
}
private void copyDataBase() throws IOException {
// Open your local db as the input stream
InputStream myInput = helperContext.getAssets().open(DATABASE_NAME);
// Path to the just created empty db
String outFileName = DB_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();
}
public void openDataBase() throws SQLException {
// Open the database
String myPath = DB_PATH + DATABASE_NAME;
mDb = SQLiteDatabase.openDatabase(myPath, null,
SQLiteDatabase.OPEN_READWRITE);
}
@Override
public synchronized void close() {
if (mDb != null)
mDb.close();
super.close();
}
}
}
我所要做的就是：
AnyDBAdapter adapter = new AnyDBAdapter(getApplicationContext());
adapter.open();
adapter.selectRecord(num);
答案 0 :(得分：0)
这是你的数据库路径吗，
private static String DB_PATH = "/data/data/com.onlywithalcohol.mk/databases/";
如果没有，则将其更改为您的数据库名称。