要实现这个目标

ImageAdapter.java

public class ImageAdapter extends BaseAdapter {

    ArrayList<String> mList;
    LayoutInflater mInflater;
    Context mContext;
    SparseBooleanArray mSparseBooleanArray;
    ImageLoader imageLoader;
    DisplayImageOptions options;

    public ImageAdapter(Context context, ArrayList<String> imageList, ImageLoader _imageLoader, DisplayImageOptions _options) {
        // TODO Auto-generated constructor stub
        mContext = context;
        mInflater = LayoutInflater.from(mContext);
        mSparseBooleanArray = new SparseBooleanArray();
        mList = new ArrayList<String>();
        this.mList = imageList;
        imageLoader=_imageLoader;
        options=_options;
    }

    public ArrayList<String> getCheckedItems() {
        ArrayList<String> mTempArry = new ArrayList<String>();

        for(int i=0;i<mList.size();i++) {
            if(mSparseBooleanArray.get(i)) {
                mTempArry.add(mList.get(i));
            }
        }

        return mTempArry;
    }

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

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

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        if(convertView == null) {
            convertView = mInflater.inflate(R.layout.row_multiphoto_item, null);
        }

        CheckBox mCheckBox = (CheckBox) convertView.findViewById(R.id.checkBox1);
        final ImageView imageView = (ImageView) convertView.findViewById(R.id.imageView1);

        imageLoader.displayImage("file://"+mList.get(position), imageView, options, new SimpleImageLoadingListener() {
            @Override
            public void onLoadingComplete(Bitmap loadedImage) {
                Animation anim = AnimationUtils.loadAnimation(mContext, R.anim.fade_in);
                imageView.setAnimation(anim);
                anim.start();
            }
        });

        mCheckBox.setTag(position);
        mCheckBox.setChecked(mSparseBooleanArray.get(position));

        mCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub
                mSparseBooleanArray.put((Integer) buttonView.getTag(), isChecked);
            }
        });

        return convertView;
    }

}

row_multophoto_item.xml

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

    <com.windhyaworks.utils.SquareImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="2dp"
        android:scaleType="centerCrop" />

    <CheckBox
        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/imageView1"
        android:layout_centerVertical="true"/>

</RelativeLayout>

SquareImageView.java

public class SquareImageView extends ImageView {
    public SquareImageView(Context context) {
        super(context);
    }

    public SquareImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SquareImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth()); //Snap to width
    }
}

Answer 1

实施SquareImageView单击适配器内的侦听器并在某处管理所选项目列表并在适配器内部检查选择的项目列表是否包含适配器pos，setchecked为true，否则将其设置为false。

如何在android中对gridview进行选择

要实现这个目标

1 个答案: