Fix a bug with some text fields

Not sure when this happens exactly, but it is possible that
InputConnection#getTextBeforeCursor returns null. This
happens for example upon rotating the screen with the
composing field empty in Gmail.
In this case, StringBuilder#append will convert the null
pointer into the string "null", which is sure better than a
crash, but can have a number of bad side-effects, like
auto-caps not working.

Bug: 7533034
Change-Id: Ia1cfab432c13a12ff1c2f013c59bac05a587f553

1 files changed, 2 insertions, 1 deletions

diff --git a/java/src/com/android/inputmethod/latin/RichInputConnection.java b/java/src/com/android/inputmethod/latin/RichInputConnection.java
index 21441369e..75b67bfc6 100644
--- a/java/src/com/android/inputmethod/latin/RichInputConnection.java
+++ b/java/src/com/android/inputmethod/latin/RichInputConnection.java
@@ -145,7 +145,8 @@ public final class RichInputConnection {
         mCurrentCursorPosition = newCursorPosition;
         mComposingText.setLength(0);
         mCommittedTextBeforeComposingText.setLength(0);
-        mCommittedTextBeforeComposingText.append(getTextBeforeCursor(DEFAULT_TEXT_CACHE_SIZE, 0));
+        final CharSequence textBeforeCursor = getTextBeforeCursor(DEFAULT_TEXT_CACHE_SIZE, 0);
+        if (null != textBeforeCursor) mCommittedTextBeforeComposingText.append(textBeforeCursor);
         mCharAfterTheCursor = getTextAfterCursor(1, 0);
         if (null != mIC) {
             mIC.finishComposingText();