feature/android f9e68ed00e4 2/3: Fix occasional crash

[Po Lu]

branch: feature/android
commit f9e68ed00e469d841c58681cd9d06e3d985614ad
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Fix occasional crash
    
    * src/androidterm.c (android_build_extracted_text): Return NULL
    if text class not initialized.
    (android_update_selection): Check that EXTRACTED is not NULL.
---
 src/androidterm.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/androidterm.c b/src/androidterm.c
index f4a535292f2..b502b1c6de5 100644
--- a/src/androidterm.c
+++ b/src/androidterm.c
@@ -5080,6 +5080,10 @@ android_build_extracted_text (jstring text, ptrdiff_t 
start,
 
   env = android_java_env;
 
+  /* Return NULL if the class has not yet been obtained.  */
+  if (!text_class.class)
+    return NULL;
+
   /* Create an ExtractedText object containing this information.  */
   object = (*env)->NewObject (env, text_class.class,
                              text_class.constructor);
@@ -5333,11 +5337,14 @@ android_update_selection (struct frame *f, struct 
window *w)
       android_exception_check_1 (string);
       ANDROID_DELETE_LOCAL_REF (string);
 
-      /* extracted is now an associated ExtractedText object.  Perform
-        the update.  */
-      android_update_extracted_text (FRAME_ANDROID_WINDOW (f),
-                                    extracted, token);
-      ANDROID_DELETE_LOCAL_REF (extracted);
+      if (extracted)
+       {
+         /* extracted is now an associated ExtractedText object.
+            Perform the update.  */
+         android_update_extracted_text (FRAME_ANDROID_WINDOW (f),
+                                        extracted, token);
+         ANDROID_DELETE_LOCAL_REF (extracted);
+       }
     }
 }