仿QQ发送图片时选中后加蒙版(想看跑车请进)

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

public class FruitAdapter extends BaseAdapter {
    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()];
    }

    @Override
    public int getCount() {
        return mFruits.size();
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int 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() {
            @Override
            public void onCheckedChanged(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

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/image"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_centerInParent="true"
       />

    <TextView
        android:id="@+id/textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/image"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"
        android:gravity="center"
        />

    <CheckBox
        android:id="@+id/checkbox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"

        android:focusable="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
        android:id="@+id/imageview_tint"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/green_tind"
        android:visibility="invisible"
        android:layout_alignRight="@+id/checkbox"
        android:layout_alignBottom="@+id/textview"

        />
</RelativeLayout>

以下为其他文件

public class GridViewActivity extends ActionBarActivity {

    private LayoutInflater mInflater;
    private List<Fruit>mFruits;
    private GridView mGridView;
    private FruitAdapter fruitAdapter;

    @Override
    protected void onCreate(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);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        getMenuInflater().inflate(R.menu.menu_grid_view, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        int id = item.getItemId();

        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}
********************************************
public class Fruit {
    private String name;
    private int img;

    public Fruit(String name, int img) {
        this.name = name;
        this.img = img;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getImg() {
        return img;
    }

    public void setImg(int img) {
        this.img = img;
    }
}

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