2.14 GridRecyclerViewActivity

GridRecyclerViewActivity

package com.example.firstapp.recyclerview;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.graphics.Rect;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

import com.example.firstapp.R;

public class GridRecyclerViewActivity extends AppCompatActivity {


    private RecyclerView mRvGrid;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate( savedInstanceState );
        setContentView( R.layout.activity_grid_recycler_view );
        mRvGrid=findViewById( R.id.rv_grid );
        mRvGrid.setLayoutManager( new GridLayoutManager( GridRecyclerViewActivity.this,3 ) );//可以规定你一行想展示几个
        mRvGrid.setAdapter( new GridAdapter( GridRecyclerViewActivity.this, new GridAdapter.OnItemClickListener() {
            @Override
            public void onclick(int pos) {
                Toast.makeText( GridRecyclerViewActivity.this, "click"+pos, Toast.LENGTH_SHORT ).show();
            }
        } ) );
    }
}