New admob plugin. I am getting a NullPointerException. Why?

Solar2D Monetization (in-app purchases, ads, etc.)
#1

Hi,

Why am I getting a java.lang.NullPointerException when I try the following code in main.lua? 

Here is my main.lua. Error occurs at the admob.load line.

local admob = require( "plugin.admob" ) local function admobAdListener( event )     if ( event.phase == "init" ) then  -- Successful initialization         print( event.provider )     end end   admob.init( admobAdListener, { appId="ca-app-pub-\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*~\*\*\*\*\*\*\*\*\*\*\*\*\*" } )  --Notice the "~" This is correct right? local function onSystemEvent( event ) if ( event.type == "applicationStart" ) then     admob.load( "interstitial", { adUnitId="ca-app-pub-\*\*\*\*\*\*\*\*\*\*\*\*\*\*/\*\*\*\*\*\*\*\*\*\*\*\*" } ) end end

Here is the error when deployed on a device. Device is old (API 16) maybe thats the problem but I have successfully managed to load and show ads but in another scene. Why am I getting this error at main.lua?

I/Corona ( 5122): ERROR: Runtime error I/Corona ( 5122): main.lua:707: java.lang.NullPointerException I/Corona ( 5122): Java Stack Trace: I/Corona ( 5122): plugin.admob.LuaLoader$Load.invoke(LuaLoader.java:670) I/Corona ( 5122): com.ansca.corona.JavaToNativeShim.nativeRender(Native Method) I/Corona ( 5122): com.ansca.corona.JavaToNativeShim.render(JavaToNativeShim.java:182) I/Corona ( 5122): com.ansca.corona.Controller.updateRuntimeState(Controller.java:347) I/Corona ( 5122): com.ansca.corona.graphics.opengl.CoronaGLSurfaceView$CoronaRenderer.onDrawFrame(CoronaGLSurfaceView.java:421) I/Corona ( 5122): com.ansca.corona.graphics.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1623) I/Corona ( 5122): com.ansca.corona.graphics.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1378)
#2

The plugin must initialize properly before calling other AdMob API functions. Move admob.load() to the admobAdListener function after checking for the “init” phase.

#3

This solved it. 

One other issue I am having is I am loading the ads in main.lua as shown and then I go to another scene. While in main.lua I confirm that the ad is loaded with print( admob.isLoaded( “banner” ) ). It returns true after a couple of seconds.

Now when I go to another scene 

local composer = require( "composer" ) local admob = require( "plugin.admob" ) function scene:show( event ) local group = self.view admob.show( "banner", { y="bottom" } ) end

the banner that is confirmed to be loaded in main.lua is not displayed and I get the error “WARNING: admob.load(adType, options), Banner not loaded”

Why is this and how can I fix it? Why am I losing the banner I loaded in the previous scene. Do I need to load() and init() in every scene?

#4

That’s a bit strange. It shouldn’t lose the banner between scene changes. I’ll investigate once I get back on Tuesday after the holidays. In the mean time, there is no harm in issuing a load() after you change scene, however init() should only be called once.

#5

Figured out whats happening.

I load a banner in main.lua and then I attempt to load a banner again at scene:show() when I change to another scene. So I am losing the previously load banner when I attempt load a new one.

This should not happen. If I am attempting to load an already loaded ad unit my attempt should be ignored and my previously load ad should not be discarded. It wasn’t being discarded in admob v2. 

#6

In that case you should move isLoaded() to your new scene before you try to load a banner again.

#7

Thats what I did. Thank you.

#8

The plugin must initialize properly before calling other AdMob API functions. Move admob.load() to the admobAdListener function after checking for the “init” phase.

#9

This solved it. 

One other issue I am having is I am loading the ads in main.lua as shown and then I go to another scene. While in main.lua I confirm that the ad is loaded with print( admob.isLoaded( “banner” ) ). It returns true after a couple of seconds.

Now when I go to another scene 

local composer = require( "composer" ) local admob = require( "plugin.admob" ) function scene:show( event ) local group = self.view admob.show( "banner", { y="bottom" } ) end

the banner that is confirmed to be loaded in main.lua is not displayed and I get the error “WARNING: admob.load(adType, options), Banner not loaded”

Why is this and how can I fix it? Why am I losing the banner I loaded in the previous scene. Do I need to load() and init() in every scene?

#10

That’s a bit strange. It shouldn’t lose the banner between scene changes. I’ll investigate once I get back on Tuesday after the holidays. In the mean time, there is no harm in issuing a load() after you change scene, however init() should only be called once.

#11

Figured out whats happening.

I load a banner in main.lua and then I attempt to load a banner again at scene:show() when I change to another scene. So I am losing the previously load banner when I attempt load a new one.

This should not happen. If I am attempting to load an already loaded ad unit my attempt should be ignored and my previously load ad should not be discarded. It wasn’t being discarded in admob v2. 

#12

In that case you should move isLoaded() to your new scene before you try to load a banner again.

#13

Thats what I did. Thank you.