GridView 使用，GirdView 方法属性。GirdView 长按出现右上角图标，点击图标删除

女爷i 2022-05-10 14:38 182阅读 0赞

*  适配器和 ListView 一样。

### GirdView 方法属性![在这里插入图片描述][70] ###

**最终效果**  
![在这里插入图片描述][70 1]

### 使用 如： 长按出现右上角图标，点击图标删除 ###

#### activity\_main.xml ####

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">
    
        <GridView
            android:id="@+id/gv"
            android:horizontalSpacing="5dp"
            android:numColumns="3"
            android:stretchMode="columnWidth"
            android:verticalSpacing="5dp"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
    </LinearLayout>

#### item\_layout.xml ####

<?xml version="1.0" encoding="utf-8"?>
    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        >
    <LinearLayout
        android:layout_marginRight="4dp"
        android:layout_marginTop="4dp"
        android:gravity="center"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    
        <ImageView
            android:id="@+id/img"
            android:layout_marginLeft="20dp"
            android:src="@mipmap/ic_launcher_round"
            android:layout_width="50dp"
            android:layout_height="50dp" />
    
        <TextView
            android:id="@+id/tv"
            android:gravity="center"
            android:text="你好"
            android:textSize="28sp"
            android:layout_width="wrap_content"
            android:layout_height="50dp" />
    </LinearLayout>
    
        <ImageView
            android:id="@+id/delete_markView"
            android:layout_width="10dp"
            android:layout_height="wrap_content"
            android:layout_gravity="right|top"
            android:adjustViewBounds="true"
            android:src="@mipmap/ic_launcher_round"
            android:visibility="gone" />
    
    
    </FrameLayout>

#### Animal.java ####

public class Animal {
        public Animal(String animal, int imgId) {
            this.animal = animal;
            this.imgId = imgId;
        }
    
        private String animal;
        private int imgId;
    
        public int getImgId() {
            return imgId;
        }
    
        public void setImgId(int imgId) {
            this.imgId = imgId;
        }
    
        public String getAnimal() {
            return animal;
        }
    
        public void setAnimal(String animal) {
            this.animal = animal;
        }
    }

#### GirdAdapter.java ####

public class GirdAdapter extends BaseAdapter {
        private Context context;
        private List<Animal> datas;
        final int position = 0;
        private boolean mIsShowDelete;
    
        public GirdAdapter(Context context, List<Animal> datas)
        {
            this.context = context;
            this.datas = datas;
        }
    
    
        // 子项个数
        @Override
        public int getCount() {
            return datas.size();
        }
        // 返回子项对象
        @Override
        public Object getItem(int position) {
            return datas.get(position);
        }
    
        // 返回子项下标
        @Override
        public long getItemId(int position) {
            return position;
        }
    
        // 创建 ViewHolder 类
        class ViewHolder {
            ImageView animalImage,deleteImage;
            TextView animalName;
    
        }
        // 返回子项视图
        @Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            Animal animal = (Animal) getItem(position);
            View view;
            ViewHolder viewHolder;
            if(convertView == null)
            {
                view = LayoutInflater.from(context).inflate(R.layout.item_layout,null);
                viewHolder = new ViewHolder();
                viewHolder.animalImage = view.findViewById(R.id.img);
                viewHolder.animalName = view.findViewById(R.id.tv);
                viewHolder.deleteImage = view.findViewById(R.id.delete_markView);
    
                view.setTag(viewHolder);
            }else{
                view = convertView;
                viewHolder = (ViewHolder) view.getTag();
            }
            viewHolder.animalName.setText(animal.getAnimal());
            viewHolder.animalImage.setImageResource(animal.getImgId());
            viewHolder.deleteImage.setVisibility(mIsShowDelete ? View.VISIBLE :View.GONE);
            if(mIsShowDelete)
            {
                viewHolder.deleteImage.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        datas.remove(position);
                        setmIsShowDelete(false);
                    }
                });
            }
            return view;
        }
    
        public void setmIsShowDelete(boolean mIsShowDelete){
            this.mIsShowDelete = mIsShowDelete;
            notifyDataSetChanged();
        }
    
    
    }

#### MainActivity ####

public class MainActivity extends AppCompatActivity{
    
    
        private GridView gridView;
        private List<Animal> datas = new ArrayList<>();
        private GirdAdapter girdAdapter;
        private  boolean isShowDelete;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            initialData();
            gridView = findViewById(R.id.gv);
            girdAdapter = new GirdAdapter(this,datas);
            gridView.setAdapter(girdAdapter);
    
            gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                    Toast.makeText(MainActivity.this, datas.get(position).getAnimal(), Toast.LENGTH_SHORT).show();
                }
            });
    
            // 删除
            gridView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
                @Override
                public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
                    if(isShowDelete)
                    {
                        isShowDelete = false;
                        girdAdapter.setmIsShowDelete(isShowDelete);
                    }else{ // 删除图片隐藏长时按显示
                        isShowDelete = true;
                        girdAdapter.setmIsShowDelete(isShowDelete);
    
                    }
                    return false;
                }
            });
    
    
    
        }
    
        private void initialData() {
            for (int i = 0; i < 20; i++) {
                datas.add(new Animal("安卓"+i,R.drawable.ic_launcher_round));
            }
        }
    }

[70]: /images/20220505/df9be13d84c842baaac485a955fd2d19.png
[70 1]: /images/20220505/cf42e0bdf6d6478f90f012c3738f1931.png