hiding root and recompiling - Android Q&A, Help & Troubleshooting

I have an app which will not run since my phone is rooted, however it is simply an app to show me the balance in my HSA acount so i have absolutely no concerns if it is compromised due to my being rooted. no account numbers are displayed the only information is why my current balance is.
so i downloaded the apktool and copied the apk off my phone and unpacked it.
here is what i found:
# direct methods
.method public constructor <init>()V
.locals 0
.prologue
.line 5
invoke-direct {p0}, Ljava/lang/Object;-><init>()V
return-void
.end method
.method public static isRooted()Z
.locals 6
.prologue
const/4 v5, 0x1
.line 15
sget-object v0, Landroid/os/Build;->TAGS:Ljava/lang/String;
.line 16
.local v0, buildTags:Ljava/lang/String;
if-eqz v0, :cond_0
const-string v3, "test-keys"
invoke-virtual {v0, v3}, Ljava/lang/String;->contains(Ljava/lang/CharSequenceZ
move-result v3
if-eqz v3, :cond_0
move v3, v5
.line 39
:goto_0
return v3
.line 22
:cond_0
:try_start_0
new-instance v1, Ljava/io/File;
const-string v3, "/system/app/Superuser.apk"
invoke-direct {v1, v3}, Ljava/io/File;-><init>(Ljava/lang/StringV
.line 23
.local v1, file:Ljava/io/File;
invoke-virtual {v1}, Ljava/io/File;->exists()Z
:try_end_0
.catch Ljava/lang/Throwable; {:try_start_0 .. :try_end_0} :catch_0
move-result v3
if-eqz v3, :cond_1
move v3, v5
.line 24
goto :goto_0
.line 26
.end local v1 #file:Ljava/io/File;
:catch_0
move-exception v3
.line 31
:cond_1
:try_start_1
invoke-static {}, Ljava/lang/Runtime;->getRuntime()Ljava/lang/Runtime;
move-result-object v3
const-string v4, "su"
invoke-virtual {v3, v4}, Ljava/lang/Runtime;->exec(Ljava/lang/StringLjava/lang/Process;
:try_end_1
.catch Ljava/lang/Throwable; {:try_start_1 .. :try_end_1} :catch_1
move-result-object v2
.line 32
.local v2, proc:Ljava/lang/Process;
if-eqz v2, :cond_2
move v3, v5
.line 33
goto :goto_0
.line 35
.end local v2 #proc:Ljava/lang/Process;
:catch_1
move-exception v3
.line 39
:cond_2
const/4 v3, 0x0
goto :goto_0
.end method
from this I took the step of renaming superuser.apk after i had disabled it, and the app would finally open.
for the line that lists /system/app/superuser.apk i can change the name, but can someone point out the invoker and tell me what to change on the line that is invoking sudo so i can recompile the app and try it out?
or can i simply null a variable so that it returns a "no root here" value?

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cnlson said:
I have an app which will not run since my phone is rooted, however it is simply an app to show me the balance in my HSA acount so i have absolutely no concerns if it is compromised due to my being rooted. no account numbers are displayed the only information is why my current balance is.
so i downloaded the apktool and copied the apk off my phone and unpacked it.
here is what i found:
# direct methods
.method public constructor <init>()V
.locals 0
.prologue
.line 5
invoke-direct {p0}, Ljava/lang/Object;-><init>()V
return-void
.end method
.method public static isRooted()Z
.locals 6
.prologue
const/4 v5, 0x1
.line 15
sget-object v0, Landroid/os/Build;->TAGS:Ljava/lang/String;
.line 16
.local v0, buildTags:Ljava/lang/String;
if-eqz v0, :cond_0
const-string v3, "test-keys"
invoke-virtual {v0, v3}, Ljava/lang/String;->contains(Ljava/lang/CharSequenceZ
move-result v3
if-eqz v3, :cond_0
move v3, v5
.line 39
:goto_0
return v3
.line 22
:cond_0
:try_start_0
new-instance v1, Ljava/io/File;
const-string v3, "/system/app/Superuser.apk"
invoke-direct {v1, v3}, Ljava/io/File;-><init>(Ljava/lang/StringV
.line 23
.local v1, file:Ljava/io/File;
invoke-virtual {v1}, Ljava/io/File;->exists()Z
:try_end_0
.catch Ljava/lang/Throwable; {:try_start_0 .. :try_end_0} :catch_0
move-result v3
if-eqz v3, :cond_1
move v3, v5
.line 24
goto :goto_0
.line 26
.end local v1 #file:Ljava/io/File;
:catch_0
move-exception v3
.line 31
:cond_1
:try_start_1
invoke-static {}, Ljava/lang/Runtime;->getRuntime()Ljava/lang/Runtime;
move-result-object v3
const-string v4, "su"
invoke-virtual {v3, v4}, Ljava/lang/Runtime;->exec(Ljava/lang/StringLjava/lang/Process;
:try_end_1
.catch Ljava/lang/Throwable; {:try_start_1 .. :try_end_1} :catch_1
move-result-object v2
.line 32
.local v2, proc:Ljava/lang/Process;
if-eqz v2, :cond_2
move v3, v5
.line 33
goto :goto_0
.line 35
.end local v2 #proc:Ljava/lang/Process;
:catch_1
move-exception v3
.line 39
:cond_2
const/4 v3, 0x0
goto :goto_0
.end method
from this I took the step of renaming superuser.apk after i had disabled it, and the app would finally open.
for the line that lists /system/app/superuser.apk i can change the name, but can someone point out the invoker and tell me what to change on the line that is invoking sudo so i can recompile the app and try it out?
or can i simply null a variable so that it returns a "no root here" value?
Click to expand...
Click to collapse
just rename the superuser.apk word and the test-keys to something else so it fails the check.
that works for the apps i've used to do this.