Question

这是我的应用中的边缘情况崩溃。用户有一个运行Android 4.4的Galaxy Tab4。该应用程序可以在其设备的某个用户帐户上正常运行，但在另一个帐户中，它在尝试创建数据库时首次运行时始终崩溃。我使用SQLiteOpenHelper调用getReadableDatabase，它与SQLiteCantOpenDatabaseException崩溃。

public class DBAccess extends SQLiteOpenHelper {
    private static DBAccess mInstance = null;
    private static String DB_NAME = "scripturetyper.db";
    private final Context myContext;
    private String sDefaultUserName = "";

    public static DBAccess getInstance(Context context){
        if(mInstance == null){
            mInstance = new DBAccess(context.getApplicationContext());
        }
        return mInstance;
    }

    public DBAccess(Context context) {
        super(context, DB_NAME, null, 1);
        this.myContext = context;
        this.close();
        try {
            this.createDataBase();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    // Creates a empty database on the system and rewrites it with your own database.
    public void createDataBase() throws IOException{
        boolean dbExist = checkDataBase();
        if(dbExist){
            //do nothing - database already exist
        }else{
            //By calling this method an 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(); //line 58
            this.close();
            copyDataBase();
        }
    }

    // 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 does not
    private boolean checkDataBase(){
        SQLiteDatabase checkDB = null;
        try{
            checkDB = SQLiteDatabase.openDatabase(myContext.getDatabasePath(DB_NAME).getAbsolutePath(), null, SQLiteDatabase.NO_LOCALIZED_COLLATORS);
        }catch(SQLiteException e){
            //database does't exist yet.
        }

        if(checkDB != null){
            checkDB.close();
        }
        return checkDB != null ? true : false;
    }
    ...

堆栈追踪：

java.lang.RuntimeException：无法启动活动ComponentInfo {com.millennialsolutions.scripturetyper / com.millennialsolutions.scripturetyper.ActivityMain}： android.database.sqlite.SQLiteCantOpenDatabaseException：未知错误（代码14）：无法打开数据库在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2331）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2389）在android.app.ActivityThread.access $ 900（ActivityThread.java:169）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1277）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:136）在android.app.ActivityThread.main（ActivityThread.java:5479） at java.lang.reflect.Method.invokeNative（Native Method）在java.lang.reflect.Method.invoke（Method.java:515）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1283）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1099） at dalvik.system.NativeStart.main（Native Method）引起：android.database.sqlite.SQLiteCantOpenDatabaseException：未知错误（代码14）：无法打开数据库在android.database.sqlite.SQLiteConnection.nativeOpen（本机方法）在android.database.sqlite.SQLiteConnection.open（SQLiteConnection.java:338）在android.database.sqlite.SQLiteConnection.open（SQLiteConnection.java:232）在android.database.sqlite.SQLiteConnectionPool.openConnectionLocked（SQLiteConnectionPool.java:512）在android.database.sqlite.SQLiteConnectionPool.open（SQLiteConnectionPool.java:206）在android.database.sqlite.SQLiteConnectionPool.open（SQLiteConnectionPool.java:178）在android.database.sqlite.SQLiteDatabase.openInner（SQLiteDatabase.java:902）在android.database.sqlite.SQLiteDatabase.open（SQLiteDatabase.java:872）在android.database.sqlite.SQLiteDatabase.openDatabase（SQLiteDatabase.java:709）在android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked（SQLiteOpenHelper.java:235）在android.database.sqlite.SQLiteOpenHelper.getReadableDatabase（SQLiteOpenHelper.java:188）在com.millennialsolutions.scripturetyper.DBAccess.createDataBase（DBAccess.java:58）在com.millennialsolutions.scripturetyper.DBAccess。（DBAccess.java:43）在com.millennialsolutions.scripturetyper.DBAccess.getInstance（DBAccess.java:32） at com.millennialsolutions.scripturetyper.Query.ExecuteString（Query.java:206）在com.millennialsolutions.scripturetyper.DBUpdates.RunDbUpdates（DBUpdates.java:20）在com.millennialsolutions.scripturetyper.ActivityMain.LoadApp（ActivityMain.java:854）在com.millennialsolutions.scripturetyper.ActivityMain.onCreate（ActivityMain.java:646）在android.app.Activity.performCreate（Activity.java:5451）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1093）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2295）

SQLiteCantOpenDatabaseException：发生在一个用户帐户上，但不发生在另一个用户帐户上

0 个答案: