Fix crash

app/src/leanback/java/com/fongmi/android/tv/ui/activity/CollectActivity.java

@@ -120,7 +120,7 @@ public class CollectActivity extends BaseActivity {
     private void search() {
         mAdapter.add(Collect.all());
         mPageAdapter.notifyDataSetChanged();
-        mExecutor = Executors.newCachedThreadPool();
+        mExecutor = Executors.newFixedThreadPool(5);
         mBinding.result.setText(getString(R.string.collect_result, getKeyword()));
         for (Site site : mSites) mExecutor.execute(() -> search(site));
     }