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PODealing with sqlite 'database is locked' errors in Android
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2011-05-12T05:47:24.483
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I have an application which has times of heavy database activity. From time to time I used to get SQLite 'database is locked' errors leading to SQLiteExceptions. Whie I have tried to use: <pre><code>if((!db.isDbLockedByCurrentThread())&&(!db.isDbLockedByOtherThreads())) { </code></pre> before using save or insert but this hasn't been successful. So, I have set up the following in a class eg. MyApplication which extends Application like so: <pre><code>private AtomicBoolean writingToDataBaseFlag = new AtomicBoolean(false); </code></pre> with an accessor: <pre><code>public AtomicBoolean getWritingToDataBaseFlag() { return writingToDataBaseFlag; } </code></pre> and any time I want to perform an insert or save I do something like this: <pre><code>boolean succeeded = false; while(!succeeded) { if(application.getWritingToDataBaseFlag().compareAndSet(false, true)) { if((!db.isDbLockedByCurrentThread())&&(!db.isDbLockedByOtherThreads())) { if(!activity.isFinishing()) { set_id(db.insert(SDIGENRE, SDIID, cv)); } } application.getWritingToDataBaseFlag().compareAndSet(true, false); succeeded = true; } else { // Wait 100 millis try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } } </code></pre> This seems to have worked well for quite a while. <ol> <li>Is this the right way to go about getting around this issue?</li> <li>I have started to see these errors again; is there any advice on how to debug this issue?</li> </ol> Thanks for any help, Julius.
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<android><sqlite>
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Dealing with sqlite 'database is locked' errors in Android
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