RecyclerView全套方案系列二

目錄

1、MainAdapter

2、item_layout

3、MainAdapterClickListener

4、MainActivity

5、activity_main

6、strings.xml

---

1、MainAdapter

public class MainAdapter extends RecyclerView.Adapter<MainAdapter.MainViewHolder> {

    private List<String> mList;

    private OnItemClickListener onItemClickListener;

    public MainAdapter(List<String> list) {
        mList = list;
    }

    public void setItemListener(OnItemClickListener listener) {
        this.onItemClickListener = listener;
    }

    @NonNull
    @Override
    public MainViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.item_name, parent, false);
        return new MainAdapter.MainViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull final MainViewHolder holder, int position) {
        String name = mList.get(position);
        TextView tv = holder.itemView.findViewById(R.id.rv_item_name_tv);
        tv.setText(name);
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (onItemClickListener != null) {
                    int index = holder.getAdapterPosition();
                    onItemClickListener.onItemClick(v, holder, index);
                }
            }
        });
    }

    @Override
    public int getItemCount() {
        if (mList != null)
            return mList.size();
        return 0;
    }

    public interface OnItemClickListener {
        void onItemClick(View view, RecyclerView.ViewHolder holder, int position);
    }

    static class MainViewHolder extends RecyclerView.ViewHolder {
        MainViewHolder(@NonNull View itemView) {
            super(itemView);
        }
    }


}

2、item_layout

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/rv_item_name_tv"
    android:layout_width="match_parent"
    android:layout_height="45dp"
    android:layout_marginTop="10dp"
    android:layout_marginBottom="10dp"
    android:background="#2d6baa"
    android:gravity="center"
    android:text="功能按鈕"
    android:textColor="#ffffff"
    android:textSize="18sp">

</TextView>

3、MainAdapterClickListener

public class MainAdapterClickListener implements MainAdapter.OnItemClickListener {
    @Override
    public void onItemClick(View view, RecyclerView.ViewHolder holder, int position) {
        processClickView(view.getContext(), position);
    }

    private void processClickView(Context context, int position) {
        switch (position) {
            case 0:
                Toast.makeText(context, "111", Toast.LENGTH_SHORT).show();
                break;
            case 1:
                Toast.makeText(context, "222", Toast.LENGTH_SHORT).show();
                break;
            case 2:
                Toast.makeText(context, "333", Toast.LENGTH_SHORT).show();
                break;
            case 3:
                Toast.makeText(context, "444", Toast.LENGTH_SHORT).show();
                break;
        }
    }
}

4、MainActivity

public class MainActivity extends AppCompatActivity {

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

    private void initView() {
        RecyclerView rvMain = findViewById(R.id.rvMain);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        rvMain.setLayoutManager(layoutManager);
        DividerItemDecoration decoration = new DividerItemDecoration(this, DividerItemDecoration.HORIZONTAL);
        rvMain.addItemDecoration(decoration);
        MainAdapter adapter = new MainAdapter(getData());
        rvMain.setAdapter(adapter);
        adapter.setItemListener(new MainAdapterClickListener());
    }

    private List<String> getData() {
        String[] name = getResources().getStringArray(R.array.rv_item_name);
        if (name == null || name.length == 0) {
            return Collections.emptyList();
        }
        return Arrays.asList(name);
    }
}

5、activity_main

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rvMain"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        tools:listitem="@layout/item_module_function"
        />

</LinearLayout>

6、strings.xml

<resources>
    <string name="app_name">UserCenterModel</string>

    <string-array name="rv_item_name">
        <item>111111111</item>
        <item>222222222</item>
        <item>333333333</item>
        <item>444444444</item>
    </string-array>
</resources>