StackOverflow2013

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10627017
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2012-05-16T21:32:49.983
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2012-05-16T21:32:49.983
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2017-05-23T11:59:40.877
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10617524
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Body
A few things: <ol> <li><a href="https://stackoverflow.com/questions/8752193/fastest-and-most-efficient-way-to-pre-populate-database-in-android/8855122#8855122">See my answer here</a> for general tips when doing bulk INSERTs.</li> <li>There is no need to have a temporary container for your INSERT statements (in this case, the ArrayList<>). Simply use <a href="https://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html#beginTransaction%28%29" rel="nofollow noreferrer">beginTransaction()</a> and <a href="https://developer.android.com/reference/android/database/sqlite/SQLiteDatabase.html#endTransaction%28%29" rel="nofollow noreferrer">endTransaction()</a> in a try...finally.</li> <li>Utilize pre-compiled statements via <a href="https://developer.android.com/reference/android/database/sqlite/SQLiteStatement.html" rel="nofollow noreferrer">SQLiteStatement</a> vs building each INSERT statement as in your example. This is needless thrashing.</li> </ol> Quick and dirty example: <pre><code>// note: untested code used for illustration! private boolean bulkInsertData(SQLiteDatabase db, final String tableName) { final int NUM_ROWS = 10000000; Random random = new Random(); try { SQLiteStatement insStmt = insStmt = db.compileStatement("INSERT INTO " + tableName + " (a, b, c) VALUES (?, ?, ?);"); db.beginTransaction(); try { for(int i = 0; i < NUM_ROWS; i++) { insStmt.bindLong(1, i); insStmt.bindLong(2, random.nextInt(100000)); insStmt.bindString(3, String.valueOf(i)); insStmt.executeInsert(); // should really check value here! } db.setTransactionSuccessful(); } finally { db.endTransaction(); } } catch(SQLException se) { return false; } return true; } </code></pre>
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1. POinsert a lot of data into sqlite in android
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