所以我正在添加一个可扩展的晶圆厂，但我遇到了这个错误，我不明白为什么......
这是日志中的确切错误：
ava.lang.ClassCastException：com.nambimobile.widgets.efab.ExpandableFabLayout 无法在 CategoryActivity.onCreate（CategoryActivity.java:56）中转换为 com.nambimobile.widgets.efab.ExpandableFab
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts;
import androidx.appcompat.app.AppCompatActivity;
import androidx.lifecycle.ViewModelProvider;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
public class CategoryActivity extends AppCompatActivity implements CategoryAdapter.onCategoryClickListener {
public static final String CATEGORY_NAME = "category_name";
private NoteViewModel noteViewModel;
private CategoryAdapter adapter;
private RecyclerView recyclerView;
private List<FolderWithNotes> folderWithNotes;
private Note note;
private Folder folder;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
noteViewModel = new ViewModelProvider.AndroidViewModelFactory(this.getApplication()).create(NoteViewModel.class);
recyclerView = findViewById(R.id.category_recyclerview);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
noteViewModel.getFolderWithNotes().observe(this, folderWithNotes -> {
});
ExpandableFab exFab = findViewById(R.id.exFab);
exFab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
switch (view.getId()) {
case (R.id.exfab_add_category):
Intent intent = new Intent(CategoryActivity.this, AddCategoryActivity.class);
startActivity(intent);
case (R.id.exfab_delete_category):
default:
break;
}
}
});
ActivityResultLauncher<Intent> launcher = registerForActivityResult( new ActivityResultContracts.StartActivityForResult(), result -> {
if(result.getResultCode() == Activity.RESULT_OK) {
Intent data = result.getData();
String category = data.getStringExtra(AddCategoryActivity.CATEGORY_REPLY);
String notes = data.getStringExtra(AddNoteActivity.NOTE_REPLY);
Folder folder = new Folder(note.getFolder_name());
noteViewModel.insert(folder, note);
}
});
}
@Override
protected void onResume() {
super.onResume();
adapter = new CategoryAdapter(folderWithNotes, this, this);
recyclerView.setAdapter(adapter);
}
@Override
public void onCategoryClick(int position) {
// code to transfer to AddNoteActivity (where the note list is) by clicking the category folder
noteViewModel.getFolderWithNotes().observe(this, folderWithNotes -> {
Intent intent = new Intent(CategoryActivity.this, NotesActivity.class);
intent.putExtra(CATEGORY_NAME, folderWithNotes.get(position).getFolder().getFolderName());
});
}
public void addCategoryClicked(View view) {
EditText editCategory = findViewById(R.id.et_add_category);
String categoryTitle = editCategory.getText().toString().trim();
Intent intent = new Intent(CategoryActivity.this, AddCategoryActivity.class);
}
public void deleteCategoryClicked(View view) {
}
// @Override
// public void addCategoryClicked(int position) {
//
// }
//
}