空对象引用上的android.view.View android.view.View.findViewById（int）'问题

Question

java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
        at com.test.apptest.Home.HomePageActivity.onCreateOptionsMenu(HomePageActivity.java:366)

第366行为：

ImageView searchIcon = (ImageView)searchView.findViewById(R.id.search_mag_icon);

显然，我正在尝试使用具有空值的对象引用。我试图了解问题出在哪里，在这里我分享了部分代码片段：

HomePageActivity.java

@Override
public boolean onCreateOptionsMenu(final Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.

    getMenuInflater().inflate(R.menu.home, menu);
    MenuItem myActionMenuItem = menu.findItem(R.id.action_search);
    Drawable drawable = menu.findItem(R.id.action_search).getIcon();
    if (drawable != null) {
        drawable.mutate();
        drawable.setColorFilter(Color.parseColor(sharedObjects.getPrimaryColor()), PorterDuff.Mode.SRC_ATOP);
    }
    final SearchView searchView = (SearchView) myActionMenuItem.getActionView();
    ImageView searchIcon = (ImageView)searchView.findViewById(R.id.search_mag_icon); // <-- Here is the error
    searchIcon.setColorFilter(Color.parseColor(sharedObjects.getPrimaryColor()));

    ImageView searchClose = searchView.findViewById(R.id.search_close_btn);
    searchClose.setColorFilter(Color.parseColor(sharedObjects.getPrimaryColor()));
    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    EditText searchEditText = (EditText) searchView.findViewById(R.id.search_src_text);
    searchEditText.setTextColor(Color.BLACK);
    searchEditText.setHintTextColor(Color.parseColor(sharedObjects.getFooterColor()));

   searchEditText.setTextColor(Color.parseColor(sharedObjects.getPrimaryColor()));
    searchEditText.setDrawingCacheBackgroundColor(Color.parseColor(sharedObjects.getPrimaryColor()));
    searchEditText.setBackgroundTintList(ColorStateList.valueOf(Color.parseColor(sharedObjects.getPrimaryColor())));
    searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
    searchView.setIconifiedByDefault(true);
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            Log.e("Submit", query);

            (menu.findItem(R.id.action_search)).collapseActionView();
            Intent intent = new Intent(HomePageActivity.this, SearchActivity.class);
            intent.putExtra(AppConstants.KEYWORD, query);
            startActivity(intent);
            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
            Log.e("TextChange", newText);
            return false;
        }
    });
    return true;
}

UPDATE

这是完整代码：

activity_homepage.xml：https://www.codepile.net/pile/X5yWyp18

HomePageactivity.java：https://www.codepile.net/pile/oJyYQWJK

任何帮助，我们都会在整个下午进行调查，我们将不胜感激

Answer 1

从堆栈跟踪中可以明显看出，您要在其上调用方法searchView的对象findViewById(R.id.search_mag_icon)为空。因此，为了解决此错误：

Answer 2

首先检查，如果myActionMenuItem.getActionView()是否返回null。