【安卓开发】Kotlin编写DataBinding+RecyclerView组合

Kotlin语言，将DataBinding和RecyclerView结合开头错误自查Unresolved reference: BR在模块的build.gradle中添加Kotlin-apt插件plugins {id 'kotlin-kapt'}kapt {generateStubs = true}不废话，直接代码数据类data class TempText(val mText: String)a

春田花花幼稚园优秀毕业生

2352人浏览 · 2022-03-09 10:27:10

春田花花幼稚园优秀毕业生 · 2022-03-09 10:27:10 发布

Kotlin语言，将DataBinding和RecyclerView结合

开头错误自查

Unresolved reference: BR

在模块的build.gradle中添加Kotlin-apt插件

plugins {

    id 'kotlin-kapt'
}
kapt {
    generateStubs = true
}

不废话，直接代码

数据类

data class TempText(val mText: String)

adapter

class RecyclerViewLearnAdapter(private val dataTemp : Array<TempText>) :
    RecyclerView.Adapter<RecyclerViewLearnAdapter.BindingHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): BindingHolder {
        val binding = DataBindingUtil.inflate<ConfigRecyclerViewLearnListItemBinding>(
            LayoutInflater.from(parent.context),
            viewType,
            parent,
            false
        )
        return  BindingHolder(binding)
    }

    override fun onBindViewHolder(holder: BindingHolder, position: Int) {
        holder.bindData(dataTemp[position])
    }

    override fun getItemCount() = dataTemp.size

    override fun getItemViewType(position: Int): Int {
        return R.layout.config_recycler_view_learn_list_item
    }

    class BindingHolder(private var binding : ConfigRecyclerViewLearnListItemBinding) : RecyclerView.ViewHolder(binding.root){

        fun bindData(tempText: TempText){
            binding.setVariable(BR.tempText,tempText)
            binding.executePendingBindings()
        }
    }
}

item的布局文件

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">
    <data>
        <variable name="tempText" type="com.example.myapplication.data.TempText" />
    </data>
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        <EditText
            android:id="@+id/list_item_textview"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/ic_launcher_background"
            android:padding="10dp"
            android:text="@{tempText.mText}"
            android:textSize="16sp" />
    </LinearLayout>

</layout>

activity文件（JAVA）

public class RecyclerViewLearn extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.config_recycler_view_learn_activity);

        RecyclerView leftRecyclerView=findViewById(R.id.recycle_view_learn_recycleview1);
       
        TempText[] data=new TempText[7];
        data[0]=new TempText("12345678");
        data[1]=new TempText("azazazaz");
        data[2]=new TempText("!!!!!!!!");
        data[3]=new TempText("????????");
        data[4]=new TempText("########");
        data[5]=new TempText("********");
        data[6]=new TempText("????????");

        LinearLayoutManager leftLayoutManager = new LinearLayoutManager(this);
        leftRecyclerView.setLayoutManager(leftLayoutManager);
        RecyclerViewLearnAdapter leftAdapter=new RecyclerViewLearnAdapter(data);
        leftRecyclerView.setAdapter(leftAdapter);

    }
}