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POForce close with in app billing function
 

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    <p>I have uploaded my app to Google Play, after few updates I'm getting error like this</p> <pre><code>java.lang.RuntimeException: Unable to start activity ComponentInfo{com.wipeout.simplegame/com.wipeout.simplegame.MainMenu}: java.lang.NullPointerException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667) at android.app.ActivityThread.access$1500(ActivityThread.java:117) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:130) at android.app.ActivityThread.main(ActivityThread.java:3687) 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:867) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException at com.wipeout.simplegame.screen.MainMenu.onCreate(MainMenu.java:238) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615) ... 11 more </code></pre> <p>Here is my MainMenu.java</p> <pre><code>private ImageView advertButton; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main_menu); advertButton = (ImageView) findViewById(R.id.advertOffButton); advertButton.setOnClickListener(new OnClickListener() { //line 238 @Override public void onClick(View v) { if (mHelper != null) { mHelper.flagEndAsync(); try { mHelper.launchPurchaseFlow(MainMenu.this, SKU_PREMIUM, RC_REQUEST, mPurchaseFinishedListener, ""); } catch (IllegalStateException ex) { } } } }); } </code></pre> <p>I set <code>flagEndAsync()</code> to the public in IabHelper, because I saw that helps somebody, but my problem still exist. Whole code in app billing I copied from Google developer site, so I don't know where is the problem. For me and few test accounts everything works great, but some people have problems with it.</p>
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    1. COIt looks like the most likely culprit is a `null` `MainMenu` object. Have you checked that that is not null?
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      1. USCodeman
    2. COSo, I should before `if (mHelper != null)` statement check that `if (MainMenu != null)` ? MainMenu.java of course is a standard android activity, so I think it's unnecessary
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    3. COI do not know how to check if it works.
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