ill make it fast and simple::

1- download APK editor pro, or buy it.

2- chose an app

3- chose full edit

4-chose decode all files

5-go to "files" tab

6- click on smali

7-go to smali folder  "here is all the codes"

8-try to understand the codes and find the file you need to change,(same as step 14).

9- E.g. "a.smali" or "b.smali" or any file

10-click on the file

11- you can see the code in smali

12-click on the three dots "option button"

13- chose java code

14- read the code in java

15- don't modify the java code

16-modify the smali code.

E.g. 1

------------------------------------

java ::: boolean r = false ;

smali ::::

const/4 v0, 0x0

sput-boolean v0, ***************;->r:Z

then you change it to :::

const/4 v0, 0x1

sput-boolean v0, ***************;->r:Z

we only changed 0x0 to 0x1

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E.g. 2

java ::: public static void c (boolean z){

r = z; } which is a method that overrides the r variable that I need to make sure its "true" all the time.

in java ill just change "r=z to r=true"
   but we can't, it will cause problems .. maybe they will fix it soon.

smali ::::

.method public static c(Z)V

    .locals 1
  //you might see ".registers" instead of ".locals" 

    sput-boolean p0, ********;->r:Z

    return-void

.end method

to do so in smali we will change it to :::

.method public static c(Z)V

    .locals 2  //change it to 2 because you need to add a new variable.

    const/4 v0,0x1 // the new variable which is " boolean bla bla = true;"

    sput-boolean v0, ********y;->r:Z
// change the p0 which it was the boolean z to our v0 which is bla bla

    return-void

.end method

---------------------------------------------------------------------

17- click on build

18- wait for it

19- you will see a choice called "try to patch"

20- if all good you can see the patch location, use this lucky patcher code in a text file and put the new odex patch next to it:::

[BEGIN]

[COPY_FILE]

{"file_name":"****.odex"}

{"to":"/data/*****/***.odex"}

[END]