java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.String.toLowerCase()' on a null object reference

Question

The application is stopping when I type on the keyboard to search for videos. The NullPointerException error is shown on line 100 in the VideoFilesActivity.java file. How to solve this problem? Please help me.

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@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.video_menu,menu);
    MenuItem menuItem = menu.findItem(R.id.search_video);
    SearchView searchView = (SearchView) menuItem.getActionView();
    searchView.setOnQueryTextListener(this);
    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onQueryTextSubmit(String query) {
    return false;
}

@Override
public boolean onQueryTextChange(String newText) {
    String inputs = newText.toLowerCase();
    ArrayList<MediaFiles> mediaFiles = new ArrayList<>();
    for (MediaFiles media:videoFilesArrayList) {
        if (media.getTitle().toLowerCase().contains(inputs)) {
          mediaFiles.add(media);
        }
    }
    VideoFilesActivity.videoFilesAdapter.updateVideoFiles(mediaFiles);
    return true;
}

}

Answer 1

Some of the array list(videoFilesArrayList) entries might be null.