viewBinding

导入

build.gradle:app（Groovy）文件文件中添加

    viewBinding {
        enabled = true
    }

以上废弃了，变更为

   buildFeatures {
        viewBinding = true
    }

以上又废弃了（报Access to ‘viewBinding’ exceeds its access rights），变更为

    buildFeatures {
        viewBinding true
    }

使用（java+kotlin）

• activities

  private ResultProfileBinding binding;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      binding = ResultProfileBinding.inflate(getLayoutInflater());
      View view = binding.getRoot();
      setContentView(view);
  }
  

  private lateinit var binding: ResultProfileBinding
  
  override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      binding = ResultProfileBinding.inflate(layoutInflater)
      val view = binding.root
      setContentView(view)
  }
  

• fragments

  private ResultProfileBinding binding;
  
  @Override
  public View onCreateView (LayoutInflater inflater,
                            ViewGroup container,
                            Bundle savedInstanceState) {
      binding = ResultProfileBinding.inflate(inflater, container, false);
      View view = binding.getRoot();
      return view;
  }
  
  @Override
  public void onDestroyView() {
      super.onDestroyView();
      binding = null;
  }
  

  private var _binding: ResultProfileBinding? = null
  // This property is only valid between onCreateView and
  // onDestroyView.
  private val binding get() = _binding!!
  
  override fun onCreateView(
      inflater: LayoutInflater,
      container: ViewGroup?,
      savedInstanceState: Bundle?
  ): View? {
      _binding = ResultProfileBinding.inflate(inflater, container, false)
      val view = binding.root
      return view
  }
  
  override fun onDestroyView() {
      super.onDestroyView()
      _binding = null
  }
  

• adapter items

  adapter中

      @NonNull
      @Override
      public TestViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
          return new TestViewHolder(TestRecyclerItemBinding.inflate(LayoutInflater.from(parent.getContext()), parent, false));
      }
  

      override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): TestViewHolder {
          return TestViewHolder(
              TestRecyclerItemBinding.inflate(
                  LayoutInflater.from(parent.context),
                  parent,
                  false
              )
          )
      }
  

  viewHolder中

      class TestViewHolder extends RecyclerView.ViewHolder {
          
          public TestViewHolder(@NonNull TestRecyclerItemBinding itemBinding) {
              super(itemBinding.getRoot());
          }
      }
  

      class TestViewHolder(
          private val binding: TestRecyclerItemBinding
      ) : RecyclerView.ViewHolder(binding.root) {
          // TODO:   
  
      }