主要实现给GridView加CheckBox选中后可以加蒙版FruitAdapter
添加CheckBox和蒙版只需在FruitAdapter中完成造作即可
{private LayoutInflater mInflater;private List<Fruit> mFruits;private boolean mCheckBoxManager[];public FruitAdapter(LayoutInflater mInflater, List<Fruit> mFruits) {this.mInflater = mInflater;this.mFruits = mFruits;mCheckBoxManager = new boolean[mFruits.size()];}() {return mFruits.size();}@Overridepublic Object getItem(int position) {return position;}(int position) {return position;}position, View convertView, ViewGroup parent) {ViewHolder vh = null;if (convertView == null) {convertView = mInflater.inflate(R.layout.gridview_item, null);vh = new ViewHolder();vh.imageView = (ImageView) convertView.findViewById(R.id.image);vh.textView = (TextView) convertView.findViewById(R.id.textview);vh.checkBox = (CheckBox) convertView.findViewById(R.id.checkbox);vh.imageViewTint = (ImageView) convertView.findViewById(R.id.imageview_tint);convertView.setTag(vh);} else {vh = (ViewHolder) convertView.getTag();}Fruit fruit = mFruits.get(position);vh.imageView.setImageResource(fruit.getImg());vh.textView.setText(fruit.getName());vh.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {(CompoundButton buttonView, boolean isChecked) {mCheckBoxManager[position] = isChecked;Log.d(“蒙版”, “” + mCheckBoxManager[position] + position);notifyDataSetChanged();}});vh.checkBox.setChecked(mCheckBoxManager[position]);if (mCheckBoxManager[position]) {vh.imageViewTint.setVisibility(View.VISIBLE);} else {vh.imageViewTint.setVisibility(View.INVISIBLE);}return convertView;}static class ViewHolder {TextView textView;ImageView imageView;CheckBox checkBox;ImageView imageViewTint;}}
此外以下XML文件实现蒙版
==”match_parent”android:orientation=”vertical”><ImageView=”100dp”android:layout_centerInParent=”true”/><TextView===”center”/><CheckBox==”false” /><!–此ImageView时实现蒙版的关键需要设置visibility开始为invisible；使用Tint设置背景色蒙版不知道为什么就是不能实现，后改为background，也有同学说应该使用alignTop和alignLeft，，我试验过都可以，并不是此原因，目前排除法唯一的区别在于使用background个tint上面。。。。。–><ImageView===”@+id/textview”/></RelativeLayout>以下为其他文件{private LayoutInflater mInflater;private List<Fruit>mFruits;private GridView mGridView;private FruitAdapter fruitAdapter;(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_grid_view);mGridView= (GridView) findViewById(R.id.gridview);//忘记获得inflater会报空指针mInflater=getLayoutInflater();mFruits=new ArrayList<>();for(int i=0;i<10;i++){Fruit apple=new Fruit(“苹果”,R.mipmap.car1);Fruit banana=new Fruit(“香蕉”,R.mipmap.car2);Fruit grape=new Fruit(“葡萄”,R.mipmap.car3);Fruit car=new Fruit(“葡萄”,R.mipmap.car4);Fruit car1=new Fruit(“葡萄”,R.mipmap.car5);Fruit car2=new Fruit(“葡萄”,R.mipmap.car6);Fruit car3=new Fruit(“葡萄”,R.mipmap.car7);Fruit car4=new Fruit(“葡萄”,R.mipmap.car8);Fruit car5=new Fruit(“葡萄”,R.mipmap.car9);mFruits.add(apple);mFruits.add(banana);mFruits.add(grape);mFruits.add(car);mFruits.add(car1);mFruits.add(car2);mFruits.add(car3);mFruits.add(car4);mFruits.add(car5);}fruitAdapter=new FruitAdapter(mInflater,mFruits);mGridView.setAdapter(fruitAdapter);}(Menu menu) {getMenuInflater().inflate(R.menu.menu_grid_view, menu);return true;}(MenuItem item) {int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}}********************************************{private String name;private int img;public Fruit(String name, int img) {this.name = name;this.img = img;}public String getName() {return name;}(String name) {this.name = name;}() {return img;}(int img) {this.img = img;}}联系朋友别欠费，天空辽阔任你飞，再多困难别后退! “
