修复 一些崩溃问题

app/src/main/java/org/autojs/autojs/autojs/AutoJs.java

@@ -52,7 +52,10 @@ public class AutoJs extends com.stardust.autojs.AutoJs {
     }
 
 
-    public static void initInstance(Application application) {
+    public synchronized static void initInstance(Application application) {
+        if (instance != null) {
+            return;
+        }
         instance = new AutoJs(application);
     }
 

app/src/main/java/org/autojs/autojs/ui/edit/editor/JavaScriptHighlighter.java

@@ -40,7 +40,7 @@ public class JavaScriptHighlighter implements SimpleTextWatcher.AfterTextChanged
         }
 
         public void addToken(int tokenStart, int tokenEnd, int color) {
-            if(mCount < tokenStart){
+            if (mCount < tokenStart) {
                 int c = mCount > 0 ? colors[mCount - 1] : color;
                 for (int i = mCount; i < tokenStart; i++) {
                     colors[i] = c;
@@ -93,10 +93,13 @@ public class JavaScriptHighlighter implements SimpleTextWatcher.AfterTextChanged
     }
 
     public void updateTokens(String sourceString) {
-        if(mTheme == null){
+        if (mTheme == null) {
             return;
         }
         final int id = mRunningHighlighterId.incrementAndGet();
+        if (mExecutorService.isShutdown() || mExecutorService.isTerminated() || mExecutorService.isTerminating()) {
+            return;
+        }
         mExecutorService.execute(() -> {
             try {
                 mLogger.reset();

app/src/main/java/org/autojs/autojs/ui/explorer/ExplorerView.java

@@ -168,6 +168,9 @@ public class ExplorerView extends ThemeColorSwipeRefreshLayout implements SwipeR
         Stack<ScriptFile> dirs = new Stack<>();
         while (!dir.equals(root)) {
             dir = dir.getParentFile();
+            if (dir == null) {
+                break;
+            }
             dirs.push(dir);
         }
         ExplorerDirPage parent = null;

app/src/main/java/org/autojs/autojs/ui/main/community/CommunityFragment.java

@@ -117,7 +117,7 @@ public class CommunityFragment extends ViewPagerFragment implements BackPressedH
 
     private boolean isInPostsPage() {
         String url = mWebView.getUrl();
-        return url.matches(POSTS_PAGE_PATTERN);
+        return url != null &&  url.matches(POSTS_PAGE_PATTERN);
     }
 
     @Override