android ViewBinding使用（替代findViewById）

1.开启viewBinding功能 在项目build.gradle 中加入：

viewBinding.enabled = true

2.Activity 绑定 java 代码：

private ActivityMainBinding mBinding;
 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mBinding = ActivityMainBinding.inflate(getLayoutInflater());
        setContentView(mBinding.getRoot());
        mBinding.textView.setText("HelloWorld");
}

kotlin 代码：

private lateinit var mBinding: ActivityMainBinding 
override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    mBinding = ActivityMainBinding .inflate(layoutInflater)
    setContentView(mBinding.root)
    mBinding.textView.text("HelloWorld");
}

3.fragment中使用

public class MainFragment extends Fragment {
    private FragmentMainBinding mBinding;
 
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        mBinding = FragmentMainBinding.inflate(inflater, container, false);
        mBinding.textView.setText("测试");
        return mBinding.getRoot();
    }
}

4.在 Dialog中使用

Dialog dialog = new Dialog(getContext());
        DialogTipBinding dialogTipBinding = DialogTipBinding.inflate(LayoutInflater.from(getContext()));
        dialog.setContentView(dialogTipBinding.getRoot());
        dialogTipBinding.tvTip.setText("温馨提示");
        dialog.show();

5.在 RecyclerView.Adapter中使用

public class MyAdapter extends RecyclerView.Adapter {
 
    private List mDataList;
 
    public MyAdapter(List mDataList) {
        this.mDataList = mDataList;
    }
 
    @NonNull
    @Override
    public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        RecyclerItemAdapterBinding binding = RecyclerItemAdapterBinding.inflate(LayoutInflater.from(parent.getContext()), parent, false);
        MyViewHolder myViewHolder = new MyViewHolder(binding);
        return myViewHolder;
    }
 
    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
        holder.mBinding.tvPrice.setText(mDataList.get(position));
    }
 
    @Override
    public int getItemCount() {
        return this.mDataList.size();
    }
 
    class MyViewHolder extends RecyclerView.ViewHolder {
        RecyclerItemAdapterBinding mBinding;
        public MyViewHolder(@NonNull RecyclerItemAdapterBinding binding ) {
            super(binding.getRoot());
            mBinding = binding;
        }
    }
}

6.在 Layout 文件中有include使用

新建include_cotent.xml

public class MainActivity extends AppCompatActivity {
    private ActivityMainBinding mBinding;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mBinding = ActivityMainBinding.inflate(getLayoutInflater());
        setContentView(mBinding.getRoot());
        IncludeContentBinding includeContentBinding = IncludeContentBinding .bind(mBinding.getRoot());
        includeContentBinding.content.setText("内容..");
    }
}