我有一个奇怪的问题，第一次运行我的应用程序并尝试将资源文件夹中的数据库复制到它，它崩溃但是之后它没关系并且数据库被复制了，我真的想要消除第一次崩溃我的应用。我一直在寻找，但我找不到和我一样有问题的人。这是我从assets文件夹复制数据库的类：
public class holidaysDatabaseAdapter extends SQLiteOpenHelper{
private static String DATABASE_NAME = "holydays.sqlite";
//public final static String DATABASE_PATH = "/data/data/myPackage/databases/";
private static final int DATABASE_VERSION = 1;
private SQLiteDatabase dataBase;
private final Context dbContext;
public holidaysDatabaseAdapter(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
this.dbContext = context;
// DATABASE_NAME = "holydays.sqlite";
// checking database and open it if exists
if (checkDataBase()) {
openDataBase();
} else
{
try {
this.getReadableDatabase();
copyDataBase();
this.close();
openDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
Toast.makeText(context, "Initial database is created", Toast.LENGTH_LONG).show();
}
}
private void copyDataBase() throws IOException{
InputStream myInput = dbContext.getAssets().open(DATABASE_NAME);
// String outFileName =dbContext.getDatabasePath("holidays.sqlite").toString();
// DATABASE_PATH + DATABASE_NAME;
OutputStream myOutput = new FileOutputStream(dbContext.getDatabasePath("holidays.sqlite"));
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}
myOutput.flush();
myOutput.close();
myInput.close();
}
public void openDataBase() throws SQLException {
String dbPath = dbContext.getDatabasePath("holidays.sqlite").toString();
dataBase = SQLiteDatabase.openDatabase(dbPath, null, SQLiteDatabase.NO_LOCALIZED_COLLATORS | SQLiteDatabase.CREATE_IF_NECESSARY);
}
public boolean checkDataBase() {
SQLiteDatabase checkDB = null;
boolean exist = false;
try {
String dbPath = dbContext.getDatabasePath("holidays.sqlite").toString();
checkDB = SQLiteDatabase.openDatabase(dbPath, null,
SQLiteDatabase.OPEN_READONLY);
} catch (SQLiteException e) {
Log.v("db log", "database does't exist :"+e.toString());
}
if (checkDB != null) {
exist = true;
checkDB.close();
}
return exist;
}
public Cursor fetchAllProfiles() {
Cursor mCursor = dataBase.query("ninety", new String[] {"_id","date","description"},
null, null, null, null, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
return mCursor;
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
}
@Override
public void onCreate(SQLiteDatabase db) {
// TODO Auto-generated method stub
}}
我在我的应用中实例化了：
holidaysDatabaseAdapter db=new holidaysDatabaseAdapter(this);
我的LogCat是：
02-07 13:13:23.199: E/SQLiteLog(29509): (14) cannot open file at line 30046 of [9491ba7d73]
02-07 13:13:23.199: E/SQLiteLog(29509): (14) os_unix.c:30046: (2) open(/data/data/ir.nimbit.newcrm/databases/holidays.sqlite) -
02-07 13:13:23.202: E/SQLiteDatabase(29509): Failed to open database '/data/data/ir.nimbit.newcrm/databases/holidays.sqlite'.
02-07 13:13:23.202: E/SQLiteDatabase(29509): android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteConnection.nativeOpen(Native Method)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:209)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:193)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:463)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:185)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:177)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:806)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:791)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:669)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at ir.nimbit.database.holidaysDatabaseAdapter.checkDataBase(holidaysDatabaseAdapter.java:79)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at ir.nimbit.database.holidaysDatabaseAdapter.<init>(holidaysDatabaseAdapter.java:35)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at ir.nimbit.newcrm.firstPage.onCreate(firstPage.java:95)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.app.Activity.performCreate(Activity.java:5933)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.app.ActivityThread.access$800(ActivityThread.java:144)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.os.Handler.dispatchMessage(Handler.java:102)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.os.Looper.loop(Looper.java:135)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at android.app.ActivityThread.main(ActivityThread.java:5221)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at java.lang.reflect.Method.invoke(Native Method)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at java.lang.reflect.Method.invoke(Method.java:372)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
02-07 13:13:23.202: E/SQLiteDatabase(29509): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
02-07 13:13:23.202: V/db log(29509): database does't exist :android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database
02-07 13:13:23.264: D/AndroidRuntime(29509): Shutting down VM
02-07 13:13:23.266: E/AndroidRuntime(29509): FATAL EXCEPTION: main
02-07 13:13:23.266: E/AndroidRuntime(29509): Process: ir.nimbit.newcrm, PID: 29509
02-07 13:13:23.266: E/AndroidRuntime(29509): java.lang.Error: Error copying database
02-07 13:13:23.266: E/AndroidRuntime(29509): at ir.nimbit.database.holidaysDatabaseAdapter.<init>(holidaysDatabaseAdapter.java:46)
02-07 13:13:23.266: E/AndroidRuntime(29509): at ir.nimbit.newcrm.firstPage.onCreate(firstPage.java:95)
02-07 13:13:23.266: E/AndroidRuntime(29509): at android.app.Activity.performCreate(Activity.java:5933)
02-07 13:13:23.266: E/AndroidRuntime(29509): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
02-07 13:13:23.266: E/AndroidRuntime(29509): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
02-07 13:13:23.266: E/AndroidRuntime(29509): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
02-07 13:13:23.266: E/AndroidRuntime(29509): at android.app.ActivityThread.access$800(ActivityThread.java:144)
02-07 13:13:23.266: E/AndroidRuntime(29509): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
02-07 13:13:23.266: E/AndroidRuntime(29509): at android.os.Handler.dispatchMessage(Handler.java:102)
02-07 13:13:23.266: E/AndroidRuntime(29509): at android.os.Looper.loop(Looper.java:135)
02-07 13:13:23.266: E/AndroidRuntime(29509): at android.app.ActivityThread.main(ActivityThread.java:5221)
02-07 13:13:23.266: E/AndroidRuntime(29509): at java.lang.reflect.Method.invoke(Native Method)
02-07 13:13:23.266: E/AndroidRuntime(29509): at java.lang.reflect.Method.invoke(Method.java:372)
02-07 13:13:23.266: E/AndroidRuntime(29509): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
02-07 13:13:23.266: E/AndroidRuntime(29509): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
请指导我。谢谢