ItemsProvider.java 文件源码

/**
 * Apply the given set of {@link ContentProviderOperation}, executing inside
 * a {@link SQLiteDatabase} transaction. All changes will be rolled back if
 * any single one fails.
 */
public ContentProviderResult[] applyBatch(ArrayList<ContentProviderOperation> operations)
        throws OperationApplicationException {
    final SQLiteDatabase db = mOpenHelper.getWritableDatabase();
    db.beginTransaction();
    try {
        final int numOperations = operations.size();
        final ContentProviderResult[] results = new ContentProviderResult[numOperations];
        for (int i = 0; i < numOperations; i++) {
            results[i] = operations.get(i).apply(this, results, i);
        }
        db.setTransactionSuccessful();
        return results;
    } finally {
        db.endTransaction();
    }
}