@Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); lesson = (Lesson) this.getIntent().getSerializableExtra("data"); ActionBar actionBar = getSupportActionBar(); actionBar.setTitle(lesson.getName()); setContentView(R.layout.activity_lesson_six); ButterKnife.bind(this); noteDao = new Note_imp(); btnAdd.setOnClickListener( view -> { addNote(); }); btnSerach.setOnClickListener( view -> { search(editText.getText().toString()); }); // 生成适配器 sixAdapter = new SixAdapter(this, noteDao.getAllNotes()); listView.setAdapter(sixAdapter); search(null); }