MainActivity.java – our program’s first run, it also contains the AsyncTask that will be executed when the user clicks a button. I made the code as simple as possible for this example to be clear and easy to follow. Our source code will have three main files, the MainActivity.java, DatabaseHandler.java and activity_main.xml. Last, right click the project and click run. Next, Open android studio and click file and the open project. Next, after you finished download the source code, extract the zip file. 3.0 Android SQLite Transaction Example Source Code First, download the source code given below. This SQL trigger is executed after the table has been created (see DatabaseHandler.java below)Īnother important factor in speeding up your insert is using prepared statements. If you’re using INSERT OR REPLACE INTO command, you have to create a trigger. In our case, we use INSERT OR REPLACE INTO on the insert query since we want to update a row if it already exists, based on the trigger (INDEX) created. The usual insert command in Android is slow, so we had to use a transaction and prepared statement. 2.0 Insert Speed Problemīut before we were able to efficiently insert the records to the database, we run into the problem of “insert speed”. All records were downloaded and inserted to the device SQLite database. android database wiki promise android-library database-management sqlite-android android-database android-promise Updated Kotlin balch / AuctionBrowser Star 7. Manage sqlite databases in android with ease. We had to paginate the download, so in our case, we had 6 pages. Fund open source developers The ReadME Project. But to be safer, I made it to 5,000 records per page. 7,000 records and our app was able to read and parse it all. So I tried some more test until I found the correct number of records per URL. I tried to parse it but failed, memory leaks occur, sometimes it was an out of memory error. Our Android app has to read, parse and store the data on the device SQLite database.ģ0,000 records in one URL load is not advisable, we did several tests. The data were from a URL with data in JSON format. All B-trees are stored in the same disk file. Separate B-trees are used for each table and each index in the database. An SQLite database is maintained on disk using a B-tree implementation found in the btree.c source file. I think that’s a lot of data for a phone app, but that’s the way our app is. Some functions such as coalesce() and typeof() are implemented as bytecode directly by the code generator. So, there is no need to perform any database setup or administration task. By default SQLite database is embedded in android. Recently, my app was required to download 30,000 records during sync. SQLite is an open-source relational database that is used to perform database operations on Android devices such as storing, manipulating or retrieving persistent data from the database. This post will cover the following contents:ģ.0 Android SQLite Transaction Example Source Codeĥ.0 Other Tips On Improving Insert Speed 1.0 The Back Story I’m really excited to share this since it helped me a lot and maybe it can help some more people as well. Today I’m going to share an Android SQLite transaction example that I consider as one of the most useful test I made with Android SQLite.
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