sqliteopenhelper

Why can't I use Resources.getSystem() without a Runtime error?

由 帅比萌擦擦* 提交于 2019-11-26 14:52:21
问题 public class BobDatabase extends SQLiteOpenHelper{ private static final String DATABASE_NAME = "bob.db"; private static final int DATABASE_VERSION = 1; public static final String DEFAULT_PROFILE = "default_profile"; public BobDatabase(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } @Override public void onCreate(SQLiteDatabase database) { createProfileTable(database); createTimeTable(database); createEventTable(database); createLocationTable(database); } /** *

DB File in Assets Folder. Will it be Updated?

由 喜你入骨 提交于 2019-11-26 13:03:54
问题 I\'m new to the Android SQLite whole thing. This is what I have: I have db.sqlite in my assets folder. The intent of the db is to READ ONLY. The user will not write to it. When the app gets updated, the db.sqlite will be replaced be a new db (I\'ll delete the old file from the project and add the new one). What I\'m concerned about is: Will the old db file gets deleted? (that\'s what I want; replacing the old one with the new one) Why ask? Because when I debug my app, each time I update the

Confusion: How does SQLiteOpenHelper onUpgrade() behave? And together with import of an old database backup?

由 此生再无相见时 提交于 2019-11-26 10:32:19
问题 let\'s assume I have a database table test_table with 2 columns and a corresponding create script in the SQLiteOpenHelper: DB_VERSION = 1: public void onCreate(SQLiteDatabase db) { db.execSql(\"CREATE table test_table (COL_A, COL_B); } This is the initial app version 1, which is published in the Play Store. After a while there\'s an update to the app and the utilized database. I guess the SQLiteOpenHelper class has to be adapted like this: DB_VERSION = 2: public void onCreate(SQLiteDatabase

Android SQLite Example [closed]

由 丶灬走出姿态 提交于 2019-11-26 06:37:31
I am new to Android and I have to create an application where I need to use a SQLite database. I am not so well equipped with the SQLite. Could you tell me what the purpose and use of the SQLiteOpenHelper class, and provide a simple database creation and insertion example? Vinay Sqlite helper class helps us to manage database creation and version management. SQLiteOpenHelper takes care of all database management activities. To use it, 1.Override onCreate(), onUpgrade() methods of SQLiteOpenHelper . Optionally override onOpen() method. 2.Use this subclass to create either a readable or writable

Android SQLite Example [closed]

由 烈酒焚心 提交于 2019-11-26 01:57:57
问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I am new to Android and I have to create an application where I need to use a SQLite database. I am not so well equipped with the SQLite. Could you tell me what the purpose and use of the SQLiteOpenHelper class,

When is SQLiteOpenHelper onCreate() / onUpgrade() run?

由 北慕城南 提交于 2019-11-25 21:30:22
问题 I have created my tables in my SQLiteOpenHelper onCreate() but receive SQLiteException: no such table or SQLiteException: no such column errors. Why? NOTE: (This is the amalgamated summary of tens of similar questions every week. Attempting to provide a \"canonical\" community wiki question/answer here so that all those questions can be directed to a good reference.) 回答1: SQLiteOpenHelper onCreate() and onUpgrade() callbacks are invoked when the database is actually opened, for example by a
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