Android billing exception

Question

I am testing my billing and I got this exception:

java.lang.IllegalStateException: Can't start async operation (launchPurchaseFlow) because another async operation(launchPurchaseFlow) is in progress.
        at utils.IabHelper.flagStartAsync(IabHelper.java:711)
        at utils.IabHelper.launchPurchaseFlow(IabHelper.java:316)
        at utils.IabHelper.launchPurchaseFlow(IabHelper.java:294)
        at com.problemio.SubscribeIntroActivity$6.onClick(SubscribeIntroActivity.java:117)
        at android.view.View.performClick(View.java:2532)
        at android.view.View$PerformClick.run(View.java:9308)
        at android.os.Handler.handleCallback(Handler.java:587)
        at android.os.Handler.dispatchMessage(Handler.java:92)
        at android.os.Looper.loop(Looper.java:150)
        at android.app.ActivityThread.main(ActivityThread.java:4293)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:507)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
        at dalvik.system.NativeStart.main(Native Method)

After I ran this code:

    Button subscribe = (Button)findViewById(R.id.subscribe);
    subscribe.setOnClickListener(new Button.OnClickListener() 
    {  
       public void onClick(View v) 
       {              
           // FIRST CHECK IF THE USER IS ALREADY A SUBSCRIBER.
          mHelper.launchPurchaseFlow(SubscribeIntroActivity.this, SUBSCRIBE_SKU, RC_REQUEST, mPurchaseFinishedListener);

       }
    });   

But prior to this I ran it as a test user and with the test product id which was this: android.test.purchased and it worked. But when I changed product id to one of my own products ids, it crashed with the exception above.

Any ideas why that happened? Thanks!

Answer 1

The IabHelper will only allow a single asynchronous query to be executed at a time. You need to implement onActivityResult() and pass the parameters into the handleActivityResult() method of the IabHelper.

The in-app billing sample code implements the method like this:

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Log.d(TAG, "onActivityResult(" + requestCode + "," + resultCode + "," + data);

    // Pass on the activity result to the helper for handling
    if (!mHelper.handleActivityResult(requestCode, resultCode, data)) {
        // not handled, so handle it ourselves (here's where you'd
        // perform any handling of activity results not related to in-app
        // billing...
        super.onActivityResult(requestCode, resultCode, data);
    }
    else {
        Log.d(TAG, "onActivityResult handled by IABUtil.");
    }
}

Answer 2

Just in case someone is missing the forest for the trees like I was...

I received a java.lang.IllegalStateException stack trace in the Play Developer Console which didn't provide much more than the error message... so I was stumped.

I couldn't figure out how this was happening at first because I never thought to try tapping the button that triggers IAB twice! (it looks disabled after the first tap due to an overlay that let's taps through, [sometimes]).

So, make sure your users can't tap your button twice.

Answer 3

You are using sample code of google and in IabHelper class line 793 there is this piece of code

 if (mAsyncInProgress) throw new IllegalStateException("Can't start async operation (" +
            operation + ") because another async operation(" + mAsyncOperation + ") is in       progress.");

and when you make a purchase for first time 'mAsyncInProgress' becomes true,and until you haven't consumed your purchase it remains true ,so you need to consume your purchase. I recommend you to read all Classes in util package completely,it will help you.

after any successful purchase you need to consume it

mHelper.consumeAsync(purchase, mConsumeFinishedListener)

but sometimes the consume request fails so you need to handle your purchases every time your activity is created :

mHelper.queryInventoryAsync(mGotInventoryListener);

and try to consume your purchases in mGotInventoryListener callback.