小编ren*_*der的帖子

是否可以在我的适配器中创建多视图类型..就像为我的标题添加视图然后在标题下面是一个列表.

我的适配器的代码段:

 public class StoreAdapter extends RecyclerView.Adapter<StoreAdapter.BindingHolder> {

        List<Store> mStoreList;

        public class BindingHolder extends RecyclerView.ViewHolder {
            private ViewDataBinding binding;
            public BindingHolder(View v) {


  super(v);
            binding = DataBindingUtil.bind(v);
        }
        public ViewDataBinding getBinding() {
            return binding;
        }
    }

    public StoreAdapter(List<Store> storeList) {
        this.mStoreList = storeList;
    }

    @Override
    public BindingHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_row_store, parent, false);
        BindingHolder holder = new BindingHolder(v);
        return holder;
    }

    @Override
    public void onBindViewHolder(BindingHolder holder, int position) {
        final Store store =  mStoreList.get(position);
        holder.getBinding().setVariable(BR.store, …

目录

@Entity(tableName = "directory")
class Directory(@PrimaryKey(autoGenerate = false) var id: Int? = null,
                @ColumnInfo(name = DIR_NAME) var dirName: String? = null,
                @Ignore var dirImages: List<Images>? = null

) : Serializable {
    companion object {
        const val DIR_NAME = "dirName"
        const val DIR_IMAGES = "dirImages"
    }
}

影像模型

@Entity(foreignKeys = arrayOf(ForeignKey(entity = Directory::class,
        parentColumns = arrayOf("id"),
        childColumns = arrayOf("id"),
        onDelete = ForeignKey.CASCADE)))

data class Images(
        @PrimaryKey(autoGenerate = false) val id: Int? = null,
        @ColumnInfo(name = "image") val images: String
) { …

这是在MainActivity中用作BroadcastReceiver的代码

 //Initializing our broadcast receiver
    mRegistrationBroadcastReceiver = new BroadcastReceiver() {

        //When the broadcast received
        //We are sending the broadcast from GCMRegistrationIntentService

        @Override
        public void onReceive(Context context, Intent intent) {
            //If the broadcast has received with success
            //that means device is registered successfully
            if(intent.getAction().equals(GCMRegistrationIntentService.REGISTRATION_SUCCESS)){
                //Getting the registration token from the intent
                String token = intent.getStringExtra("token");
                //Displaying the token as toast
                Toast.makeText(getApplicationContext(), "Registration token:" + token, Toast.LENGTH_LONG).show();

                //if the intent is not with success then displaying error messages
            } else if(intent.getAction().equals(GCMRegistrationIntentService.REGISTRATION_ERROR)){
                Toast.makeText(getApplicationContext(), …

布局：

<android.support.design.widget.BottomNavigationView
                android:id="@+id/navigation"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="bottom"
             app:onNavigationItemSelected="@{viewModel.onNavigationItemSelected}"
                android:background="?android:attr/windowBackground"
                app:menu="@menu/menu_home_tab" />

代码：

@BindingAdapter("onNavigationItemSelected")
    public static void setOnNavigationItemSelected(
            BottomNavigationView view, BottomNavigationView listener) {
        view.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {

                switch (item.getItemId()) {
                    case R.id.navigation_dashboard:
                        Log.d("test","test1");
                        return true;
                    case R.id.navigation_notifications:
                        Log.d("test","test2");
                        return true;

                }
                return false;
            }

        });

    }

这将返回一个错误

Error:(183, 49) Could not find accessor viewmodel.onNavigationItemSelected 

我正在尝试在我的底部导航视图上实现数据绑定