无法打开数据库/无法将（数据库）的区域设置更改为“en_US”
我已经阅读了无法将db’/data/data/my.easymedi.controller/databases/EasyMediInfo.db’的语言环境更改为’en_US’的解决方案，但它对我没有帮助。 我仍然有同样的错误。
这些是我的DBHelper类。 你能调查一下并帮助我吗？
package com.example.mgr; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.sql.Date; import java.util.ArrayList; 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; public class DBHelper extends SQLiteOpenHelper{ //The Android's default system path of your application database. private static String DB_PATH = "/data/data/com.example.mgr/databases/"; private static String DB_NAME = "Mgr.Test.db"; private SQLiteDatabase myDataBase; private final Context myContext; public static final String KEY_ROWID = "_id"; public static final String KEY_DATE = "DataWstawiena"; public static final String KEY_TRESC = "Tresc"; public static final String DATABASE_NAME = "Mgr.Test"; public static final String DATABASE_TABLE = "InformacjeZDziekanatu"; private static int DATABASE_VERSION = 18; /** * Constructor * Takes and keeps a reference of the passed context in order to access to the application assets and resources. * @param context */ public DBHelper(Context context) { super(context, DB_NAME, null, DATABASE_VERSION); System.out.println("------Odpalam DBHelpera---wolane z konstruktora----"); this.myContext = context; } /** * Creates a empty database on the system and rewrites it with your own database. * */ public void createDataBase() throws IOException{ boolean dbExist = checkDataBase(); System.out.println("----Baza istnieje: " + dbExist + "-----"); if(dbExist){ System.out.println("----Baza istnieje!"); this.getReadableDatabase(); System.out.println("----Baza istnieje! znow"); //do nothing - database already exist } dbExist = checkDataBase(); if(!dbExist){ System.out.println("----Baza nie istnieje"); //By calling this method and empty database will be created into the default system path //of your application so we are gonna be able to overwrite that database with our database. this.getReadableDatabase(); try { System.out.println("Bede kopiowal"); copyDataBase(); } catch (IOException e) { throw new Error("Error copying database"); } } } /** * Check if the database already exist to avoid re-copying the file each time you open the application. * @return true if it exists, false if it doesn't */ private boolean checkDataBase(){ SQLiteDatabase checkDB = null; System.out.println("----Baza istnieje w checkDB!"); try{ String myPath = DB_PATH + DB_NAME; checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.NO_LOCALIZED_COLLATORS|SQLiteDatabase.OPEN_READONLY); System.out.println("Bazka otwarta!"); }catch(SQLiteException e){ System.out.println("database does't exist yet"); } if(checkDB != null){ System.out.println("Zamykam baze"); checkDB.close(); } return checkDB != null ? true : false; } /** * Copies your database from your local assets-folder to the just created empty database in the * system folder, from where it can be accessed and handled. * This is done by transfering bytestream. * */ private void copyDataBase() throws IOException{ //Open your local db as the input stream InputStream myInput = myContext.getAssets().open(DB_NAME); // Path to the just created empty db String outFileName = DB_PATH + DB_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 SQLiteDatabase openDataBase() throws SQLException{ String myPath = DB_PATH + DB_NAME; myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.NO_LOCALIZED_COLLATORS|SQLiteDatabase.OPEN_READONLY); return myDataBase; } @Override public synchronized void close() { if(myDataBase != null) myDataBase.close(); super.close(); } @Override public void onCreate(SQLiteDatabase db) { } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { try { copyDataBase(); } catch (IOException e) { e.printStackTrace(); } System.out.println(" ----Jestem w mtodzie onUpgrade------"); //DATABASE_VERSION++; } /** * Wykonuje zapytanie SQL * @param query - zapytanie SQL * @return zwraca Stringa z rezultatem */ public String executeQuery(String query){ String result = ""; Cursor cursor = myDataBase.rawQuery(query, null); String dataWs ="Data Wstawienia "; String tresc = "Tresc"; result = dataWs + tresc + "\n"; if(cursor.moveToFirst()) { do { result += cursor.getString(1) +" "+ cursor.getString(3)+"\n"; }while(cursor.moveToNext()); } return result; } /** * Wykonuje zapytanie SQL i zwraca tablice * @param query - zapytanie SQL * @return zwraca tablie Stringa z rezultatem */ public ArrayList executeQueryTab(String query){ ArrayList result = new ArrayList(); Cursor cursor = myDataBase.rawQuery(query, null); String dataWs ="Data Wstawienia "; String tresc = "Tresc"; result.add(dataWs + tresc); if(cursor.moveToFirst()) { do { result.add(cursor.getString(1) +" "+ cursor.getString(3)); }while(cursor.moveToNext()); } return result; } // Add your public helper methods to access and get content from the database. // You could return cursors by doing "return myDataBase.query(....)" so it'd be easy // to you to create adapters for your views. }
它以前工作得很好，但我已经对数据库进行了一些升级，然后停止了工作。 我想这是这个错误的根源，但我不确定。
提前致谢！
根据您的要求：
我在MainActivity类中调用了createDataBase方法，如下所示：
package com.example.mgr; import java.io.IOException; import java.util.ArrayList; import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.os.Bundle; import android.preference.PreferenceManager; import android.view.Gravity; import android.view.View; import android.view.View.OnClickListener; import android.widget.Adapter; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener { SharedPreferences preferences; TextView tv; Adapter adapter; SQLiteDatabase as; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button infDlaStudButton = (Button) findViewById(R.id.infDlaStud); Button infDlaKandButton = (Button) findViewById(R.id.infDlaKand); preferences = PreferenceManager.getDefaultSharedPreferences(this); DBHelper myDbHelper = new DBHelper(this); infDlaStudButton.setOnClickListener(this); infDlaKandButton.setOnClickListener(this); infDlaKandButton.setOnClickListener(new OnClickListener() { public void onClick(View arg0) { ble(); } }); infDlaStudButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { ble(); } }); try { myDbHelper.createDataBase(); System.out.println("Stworzyłam bazę danych"); } catch (IOException ioe) { throw new Error("nie moge to create database"); } System.out.println("bede otwierdal baze danych w glowej metodzie"); myDbHelper.openDataBase(); } void ble() { Intent intent = new Intent(); intent.setClass(MainActivity.this, SecondActivity.class); startActivity(intent); } @Override public void onClick(View arg0) { Toast.makeText(this, "ble", Toast.LENGTH_LONG).show(); // TODO Auto-generated method stub } }
是的， android_metadata表存在于数据库中并具有“ en_US ”值。
我创建了新的，非常简单的数据库Drzewo.db 。 当这个表只有2个表时： andoid_metadata和另一个表（ Przyjeci ）然后一切正常！ 但后来我添加了新表并试图进行升级，我也有同样的错误。
有我的日志 （来自这个新数据库）：
12-04 19:58:41.959: E/SQLiteLog(2293): (11) database corruption at line 50741 of [00bb9c9ce4] 12-04 19:58:41.959: E/SQLiteLog(2293): (11) database corruption at line 50780 of [00bb9c9ce4] 12-04 19:58:41.969: E/SQLiteLog(2293): (11) statement aborts at 16: [SELECT locale FROM android_metadata UNION SELECT NULL ORDER BY locale DESC LIMIT 1] 12-04 19:58:42.056: E/SQLiteDatabase(2293): Failed to open database '/data/data/com.example.mgr/databases/Drzewo.db'. 12-04 19:58:42.056: E/SQLiteDatabase(2293): android.database.sqlite.SQLiteException: Failed to change locale for db '/data/data/com.example.mgr/databases/Drzewo.db' to 'en_US'. 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteConnection.setLocaleFromConfiguration(SQLiteConnection.java:386) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:218) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:854) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:229) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:188) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at com.example.mgr.DBHelper.createDataBase(DBHelper.java:53) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at com.example.mgr.MainActivity.onCreate(MainActivity.java:73) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.app.Activity.performCreate(Activity.java:5104) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.app.ActivityThread.access$600(ActivityThread.java:141) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.os.Handler.dispatchMessage(Handler.java:99) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.os.Looper.loop(Looper.java:137) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.app.ActivityThread.main(ActivityThread.java:5041) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at java.lang.reflect.Method.invokeNative(Native Method) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at java.lang.reflect.Method.invoke(Method.java:511) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at dalvik.system.NativeStart.main(Native Method) 12-04 19:58:42.056: E/SQLiteDatabase(2293): Caused by: android.database.sqlite.SQLiteDatabaseCorruptException: database disk image is malformed (code 11) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteConnection.nativeExecuteForString(Native Method) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteConnection.executeForString(SQLiteConnection.java:634) 12-04 19:58:42.056: E/SQLiteDatabase(2293): at android.database.sqlite.SQLiteConnection.setLocaleFromConfiguration(SQLiteConnection.java:367) 12-04 19:58:42.056: E/SQLiteDatabase(2293): ... 28 more 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): Couldn't open Drzewo.db for writing (will try read-only): 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): android.database.sqlite.SQLiteException: Failed to change locale for db '/data/data/com.example.mgr/databases/Drzewo.db' to 'en_US'. 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteConnection.setLocaleFromConfiguration(SQLiteConnection.java:386) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:218) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:804) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:854) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:229) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:188) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at com.example.mgr.DBHelper.createDataBase(DBHelper.java:53) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at com.example.mgr.MainActivity.onCreate(MainActivity.java:73) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.app.Activity.performCreate(Activity.java:5104) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.app.ActivityThread.access$600(ActivityThread.java:141) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.os.Handler.dispatchMessage(Handler.java:99) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.os.Looper.loop(Looper.java:137) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.app.ActivityThread.main(ActivityThread.java:5041) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at java.lang.reflect.Method.invokeNative(Native Method) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at java.lang.reflect.Method.invoke(Method.java:511) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at dalvik.system.NativeStart.main(Native Method) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): Caused by: android.database.sqlite.SQLiteDatabaseCorruptException: database disk image is malformed (code 11) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteConnection.nativeExecuteForString(Native Method) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteConnection.executeForString(SQLiteConnection.java:634) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): at android.database.sqlite.SQLiteConnection.setLocaleFromConfiguration(SQLiteConnection.java:367) 12-04 19:58:42.219: E/SQLiteOpenHelper(2293): ... 28 more 12-04 19:58:42.259: D/AndroidRuntime(2293): Shutting down VM 12-04 19:58:42.280: W/dalvikvm(2293): threadid=1: thread exiting with uncaught exception (group=0x40a71930) 12-04 19:58:42.359: E/AndroidRuntime(2293): FATAL EXCEPTION: main 12-04 19:58:42.359: E/AndroidRuntime(2293): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mgr/com.example.mgr.MainActivity}: android.database.sqlite.SQLiteException: Can't upgrade read-only database from version 5 to 6: Drzewo.db 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.app.ActivityThread.access$600(ActivityThread.java:141) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.os.Handler.dispatchMessage(Handler.java:99) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.os.Looper.loop(Looper.java:137) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.app.ActivityThread.main(ActivityThread.java:5041) 12-04 19:58:42.359: E/AndroidRuntime(2293): at java.lang.reflect.Method.invokeNative(Native Method) 12-04 19:58:42.359: E/AndroidRuntime(2293): at java.lang.reflect.Method.invoke(Method.java:511) 12-04 19:58:42.359: E/AndroidRuntime(2293): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 12-04 19:58:42.359: E/AndroidRuntime(2293): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 12-04 19:58:42.359: E/AndroidRuntime(2293): at dalvik.system.NativeStart.main(Native Method) 12-04 19:58:42.359: E/AndroidRuntime(2293): Caused by: android.database.sqlite.SQLiteException: Can't upgrade read-only database from version 5 to 6: Drzewo.db 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:245) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:188) 12-04 19:58:42.359: E/AndroidRuntime(2293): at com.example.mgr.DBHelper.createDataBase(DBHelper.java:53) 12-04 19:58:42.359: E/AndroidRuntime(2293): at com.example.mgr.MainActivity.onCreate(MainActivity.java:73) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.app.Activity.performCreate(Activity.java:5104) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 12-04 19:58:42.359: E/AndroidRuntime(2293): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 12-04 19:58:42.359: E/AndroidRuntime(2293): ... 11 more
我在eclipse juno + Android 4.2.2上工作
可能数据库文件实际上已损坏。 您可以尝试使用sqlitebrowser打开它
此外，如果您在计算机中安装了sqlite，则可以执行其他一些检查并尝试将其还原以防万一已损坏。 您可以按照以下步骤操作：
- 在这里获取sqlite并安装它
- 打开命令添加sqlite oyour environnment变量路径的路径，以允许您在任何地方启动sqlite命令
-
转到您拥有数据库的目录，然后启动SQLite：
sqlite3 yourfile.db -
您可以通过以下方式检查数据库完整
pragma integrity_check; -
如果它说文件没问题，那么我们就输了！ 如果它已损坏，我们尝试恢复它。
有时，损坏的sqlite3数据库的最佳解决方案简单而有效：转储和恢复
-
将数据导出到sql文件：
echo .dump | sqlite3.exe yourdbname.db > yourdbname.sql -
更改文件名mv yourdbname.db yourdbname.db.original
-
用你的sql创建一个新的数据库。
sqlite3.exe -init yourdbname.sql yourdbname.db -
使用sqlite浏览器打开新文件，看看会发生什么！
我无法将所有这些代码放在评论中，所以请尝试这些：请记住，我没有添加所有的样板……好吗？
更改checkDb方法：
private boolean checkDataBase(){ File dbFile = new File( DATABASE_PATH, DATABASE_NAME ); return dbFile.exists(); }
更改createDb方法：
public void createDataBase() { if(checkDb()){ //do nothing } else { copyDatabase(); } }
更改copyDatabase（）方法：
private void copyDataBase(){ getReadableDatabase(); //add the rest of your current implementation }
将构造函数的可访问性更改为private并添加以下方法：
private DBHelper mInstance = null; public static DBHelper getInstance(Context context) { if(mInstance == null) mInstance = new DBHelper(context) return mInstance; } //remove the old openDatabase method public SQLiteDatabase openDatabase() { return getReadableDatabase(); //or you can use getWritableDatabase(); }
除了我注意到你发布的代码中的数据库版本是18，而你发布的日志中的数据是5或6？ 你能发布最新的日志吗？
您遇到的问题是无法打开该文件。 可能它的路径有问题（不同的Android版本之间可能会略有不同），无论如何，你永远不应该对它进行硬编码。
您可以使用context.getDatabasePath();获取数据库路径context.getDatabasePath(); 您将所需的名称传递给文件（无论它是否存在）。 实际上你应该这样做
为此，在任何地方使用String outFileName = DB_PATH + DB_NAME; 你应该改变它
String outFileName =myContext.getDatabasePath(DB_NAME).getPath() ;
这是您文件的真正有效位置。 所以，你的copyDataBase（）将是这样的
private void copyDataBase() throws IOException { // Open your local db as the input stream InputStream myInput = context.getAssets().open("db/" + DATABASE_NAME); // Path to the just created empty db String outFileName =myContext.getDatabasePath(DB_NAME).getPath() ; // 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(); }
和你的private boolean checkDataBase()相同的变化
试试这个
db = SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.NO_LOCALIZED_COLLATORS | SQLiteDatabase.OPEN_READWRITE);