How to get all table names in android sqlite database?

How to get all table names in android sqlite database?

To get a list of all table names in an Android SQLite database, you can query the sqlite_master table, which is a system table that stores metadata about the database schema. Here's an example of how to do it using Android's SQLiteOpenHelper class:

import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; public class DatabaseHelper extends SQLiteOpenHelper { private static final String DATABASE_NAME = "your_database_name.db"; private static final int DATABASE_VERSION = 1; public DatabaseHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } @Override public void onCreate(SQLiteDatabase db) { // Create your database tables here // ... } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { // Upgrade your database here // ... } public String[] getAllTableNames() { SQLiteDatabase db = getReadableDatabase(); Cursor cursor = db.query("sqlite_master", new String[]{"name"}, "type='table'", null, null, null, null); String[] tableNames = null; if (cursor != null) { int count = cursor.getCount(); tableNames = new String[count]; int index = 0; while (cursor.moveToNext()) { tableNames[index] = cursor.getString(0); index++; } cursor.close(); } db.close(); return tableNames; } }

In this example:

  1. Create a subclass of SQLiteOpenHelper called DatabaseHelper.

  2. Override the onCreate and onUpgrade methods to define your database schema and upgrade logic if needed.

  3. Define a method getAllTableNames to retrieve all table names from the sqlite_master table.

  4. Inside the getAllTableNames method:

    • Get a readable database using getReadableDatabase().

    • Query the sqlite_master table for rows where the type is 'table', which filters out other objects like indexes and views.

    • Extract the table names from the query result.

    • Close the cursor and the database when done.

To use this DatabaseHelper class to get the table names:

DatabaseHelper dbHelper = new DatabaseHelper(context); String[] tableNames = dbHelper.getAllTableNames();

Replace "your_database_name.db" with the name of your SQLite database file, and make sure to create your database tables in the onCreate method of the DatabaseHelper class.

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