calling a method in a smali file using ApplicationContext - applicationcontext

Question

I want to call a method using p0 ApplicationContext:Landroid/content/Context.
How can I get the ApplicationContext for the class?
I tried calling my method from the init method of the class in order to copy p0, but android failed to verify the class with this.
Any ideas? I will provide more detail if required.
#JesusFreke : More info
1 EDITED CRASH
10-06 15:43:48.081 14308 14557 E AndroidRuntime: FATAL EXCEPTION: WFSync
10-06 15:43:48.081 14308 14557 E AndroidRuntime: Process: com.zynga.words3, PID: 14308
10-06 15:43:48.081 14308 14557 E AndroidRuntime: java.lang.VerifyError: Verifier rejected class com.zynga.wfframework.appmodel.game.GameCenter$6: void com.zynga.wfframework.appmodel.game.GameCenter$6.<init>(com.zynga.wfframework.appmodel.game.GameCenter, android.content.Context, com.zynga.wfframework.appmodel.AppModelCallback, java.util.Date, long, java.util.Date, long, com.zynga.wfframework.remoteservice.IRemoteService$PollType, com.zynga.wfframework.appmodel.sync.SyncService$SyncServicePollType, android.content.Intent, int) failed to verify: void com.zynga.wfframework.appmodel.game.GameCenter$6.<init>(com.zynga.wfframework.appmodel.game.GameCenter, android.content.Context, com.zynga.wfframework.appmodel.AppModelCallback, java.util.Date, long, java.util.Date, long, com.zynga.wfframework.remoteservice.IRemoteService$PollType, com.zynga.wfframework.appmodel.sync.SyncService$SyncServicePollType, android.content.Intent, int):
[0x41] 'this' arg must be initialized
(declaration of 'com.zynga.wfframework.appmodel.game.GameCenter$6' appears in /data/app/com.zynga.words3-2/base.apk:classes3.dex)
10-06 15:43:48.081 14308 14557 E AndroidRuntime: at com.zynga.wfframework.appmodel.game.GameCenter.refreshState(SourceFile:1201)
10-06 15:43:48.081 14308 14557 E AndroidRuntime: at com.zynga.wfframework.appmodel.game.GameCenter.refreshState(SourceFile:1144)
10-06 15:43:48.081 14308 14557 E AndroidRuntime: at com.zynga.wfframework.appmodel.sync.SyncService$1.run(SourceFile:189)
10-06 15:43:48.081 14308 14557 E AndroidRuntime: at java.lang.Thread.run(Thread.java:761)
2 PARTIAL CODE
.method constructor <init>(Lcom/zynga/wfframework/appmodel/game/GameCenter;Landroid/content/Context;Lcom/zynga/wfframework/appmodel/AppModelCallback;Ljava/util/Date;JLjava/util/Date;JLcom/zynga/wfframework/remoteservice/IRemoteService$PollType;Lcom/zynga/wfframework/appmodel/sync/SyncService$SyncServicePollType;Landroid/content/Intent;I)V
.registers 16
...
##41
#v0=(Reference,Lcom/zynga/wfframework/remoteservice/RemoteServiceSyncResult;);v1=(Null);p0=(UninitThis,Lcom/zynga/wfframework/appmodel/game/GameCenter$6;);
invoke-virtual {p0, v1, v0}, Lcom/zynga/wfframework/appmodel/game/GameCenter$6;->onPostExecute(ILcom/zynga/wfframework/remoteservice/RemoteServiceSyncResult;)V
Why is p0 not initialised? What can I do to catch it initialised?
Hope you can help. By the way, I fixed the problem in another way, but this relies on an error method in the class being called. I would prefer to find another solution.

Answer 1

In a constructor, the this argument (p0) starts out as uninitialized, and it can't be used until it has been initialized. You must call the superclass's <init> method to initialize it.
e.g. if the super class is Lcom/some/superclass;, and it has a no-args constructor, you would need to add
invoke-direct {p0}, Lcom/some/superclass;-><init>()V
at some point before you try to use p0.
Assuming you're starting out with a working method to begin with, the constructor should already have such an instruction. In which case, you just need to move your method call after it.