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I have the same problem on my HTC flyer(android 3.x)
when mixing "left to right" with "right to left", then sometimes cause StringIndexOutOfBoundsException.

my stacktrace like this

java.lang.StringIndexOutOfBoundsException: start=20 end=13 buffer.length=26 index=0 length=22
 at java.lang.String.getChars(String.java:943)
 at android.text.SpannableStringInternal.getChars(SpannableStringInternal.java:70)
 at android.text.TextUtils.getChars(TextUtils.java:66)
 at android.text.TextLine.set(TextLine.java:141)
 at android.text.Layout.draw(Layout.java:390)
 at android.widget.TextView.onDraw(TextView.java:4675)
 

to reproduce incorrect mLines generation please create StaticLayout with
width = 532
align = ALIGN_NORMAL
source =
"Gshsh jdjd jd. Fj bjjdjr jfjf.  Fjfjrhfjrjrj jfjrhrururjrjr urjrb hdjdjr jrjrjr jfjfj hdhdj jdjjff hdhdhdhgjfjf.           Hdhd.  hdjdjdhdbdhfjfjf"

where  are 0xE401 symbols that are replaced by ImageSpans with size of 64

this will produce the following mLines:

mLines   (id=830032126608)      
        [0]     1073741824 [0x40000000]
        [1]     0 [0x0] [^@ (NUL)]      
        [2]     8 [0x8] [^H (BS)]      
        [3]     1073741856 [0x40000020]
        [4]     42 [0x2a] [*]  
        [5]     8 [0x8] [^H (BS)]      
        [6]     1073741870 [0x4000002e]
        [7]     80 [0x50] [P]  
        [8]     8 [0x8] [^H (BS)]      
        [9]     1073741912 [0x40000058]
        [10]    118 [0x76] [v]  
        [11]    8 [0x8] [^H (BS)]      
        [12]    1073741892 [0x40000044]
        [13]    156 [0x9c] [^Ü]
        [14]    8 [0x8] [^H (BS)]      
        [15]    1073741925 [0x40000065]
        [16]    194 [0xc2] [Â]  
        [17]    8 [0x8] [^H (BS)]      
        [18]    1073741956 [0x40000084]
        [19]    232 [0xe8] [è]  
        [20]    9 [0x9] [^I (TAB)]      
        [21]    150 [0x96] [^Ö]
        [22]    290 [0x122] [Ģ]
        [23]    0 [0x0] [^@ (NUL)]      
        [24]    0 [0x0] [^@ (NUL)]      
        [25]    0 [0x0] [^@ (NUL)]      
        [26]    0 [0x0] [^@ (NUL)]      
        [27]    0 [0x0] [^@ (NUL)]      
        [28]    0 [0x0] [^@ (NUL)]      

-- line 3 has an offset 0x58, line 4 has an offset 0x44.

this would not crash because of English, but the layout is wrong.

such incorrectly calculated layout would crash for Arabic when TextLine.set would call  TextUtils.getChars

@Dmitri, could you attach a bugreport. I need to see the Android version and some other infos.

Can you also give the exact code you are using for repro?

Cannot repro on ICS (4.0.4 / IML76I). I am suspecting you are using a "pre ICS" version (Gingerbread for example ?)

the attached bugreport is for slightly different string that I had in the initial post, but the crash place is the same:
06-04 18:00:18.302  1063  1063 E AndroidRuntime: java.lang.StringIndexOutOfBoundsException: length=122; regionStart=117; regionLength=-6

06-04 18:00:18.302  1063  1063 E AndroidRuntime:        at java.lang.String.startEndAndLength(String.java:593)

06-04 18:00:18.302  1063  1063 E AndroidRuntime:        at java.lang.String.getChars(String.java:902)

06-04 18:00:18.302  1063  1063 E AndroidRuntime:        at android.text.SpannableStringInternal.getChars(SpannableStringInternal.java:70)

06-04 18:00:18.302  1063  1063 E AndroidRuntime:        at android.text.TextUtils.getChars(TextUtils.java:70)

06-04 18:00:18.302  1063  1063 E AndroidRuntime:        at android.text.TextLine.set(TextLine.java:150)

06-04 18:00:18.302  1063  1063 E AndroidRuntime:        at android.text.Layout.draw(Layout.java:424)

Hi
This is my error report and sample project
the String content is no meaning, I just want to reproduce my error.
On my galaxy nexus 4.0.2 and emulator 4.0 api level 14 (WVGA800) will crash.
If remove line 73(imagespans), then it works.

updated to 4.0.4; was not able to reproduce.
(before was testing 4.0.2)

My sample code still crash my emulator when i change to 4.0.3 level 15(WVGA800)

Flyer 3.2.1 will crash too(need to change the TextView's content)

Is there any work around to avoid this if I still want imagespan in TextView?

the workaround i found was to extend TextView; extend Spannable.Factory; set my spannable factory to TextView; this spannable factory creates spannable that delegates all methods to SpannableString, but getChars (in getChars i check if start < end); override TextView.setText where i call super.setText(text, TextView.BufferType.SPANNABLE) if ((Build.VERSION.SDK_INT >= 11) && (text instanceof Spanned))

Hello Dimitri,
is there any news regarding this issue ? i think i have the exact same bug on my app.
Would you care to post the code which you extended textview ?

Thanks

I got this issue too. Thanks in advance.

Sorry dude.
No one posted code - I couldn't find a solution so I just found another way to do what i wanted without using spannable ...

Thank you for your feedback. We have tried our best to address the issue reported, however our product team has shifted work priority which doesn't include this issue. For now, we will be closing the issue as "Won't Fix (Obsolete)". If this issue still currently exists, we request that you log a new issue along with the latest bug report here: https://goo.gl/TbMiIO and reference this bug for context.