android - 在 android 图像中替换 gridview 中的问题

Question

我在这里提供我的代码。我将图像分成 9 个部分，并在 GridView 中显示如何通过单击它们来更改图像，即(第一次单击的图像应替换为第二次单击的图像，反之亦然)我有使用位图数组分割图像并将它们放置在 GridView 中。那么如何通过单击两个图像来更改 GridView 中的图像应该完成图像的交换谁能帮助我。

public class Imagepieces extends Activity {
                ArrayList<Bitmap> breakedimages,duplicate;
                GridView g;
                int i=0,temp,temp2,rpos;

                @Override

                protected void onCreate(Bundle savedInstanceState) {
                    // TODO Auto-generated method stub
                    super.onCreate(savedInstanceState);
                    setContentView(R.layout.activity_image);
                    breakedimages = getIntent().getParcelableArrayListExtra("breaked image");
                    duplicate = new ArrayList<Bitmap>(breakedimages);
                    Collections.shuffle(duplicate);
                    g = (GridView) findViewById(R.id.gridView1);
                    g.setAdapter(new CutAdapter(this, breakedimages));
                    g.setNumColumns((int) Math.sqrt(breakedimages.size()));
                    g.setOnItemClickListener(new OnItemClickListener() {

                        @Override
                        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                                long arg3) {                
                            // TODO Auto-generated method stub
                            //=================================================
                            {






                        }
                    });
                }

                class CutAdapter extends BaseAdapter {
                    int iwidth, iheight; 
                    Context context;

                    public CutAdapter(Imagepieces ipieces, ArrayList<Bitmap> breakedimages) {
                        // TODO Auto-generated constructor stub
                        iwidth = breakedimages.get(0).getWidth();
                        iheight = breakedimages.get(0).getHeight();
                        context = ipieces;
                    }

                    @Override
                    public int getCount() {
                        // TODO Auto-generated method stub
                        return duplicate.size();
                    }

                    @Override
                    public Object getItem(int arg0) {
                        // TODO Auto-generated method stub
                        return duplicate.get(arg0);
                    }

                    @Override
                    public long getItemId(int arg0) {
                        // TODO Auto-generated method stub
                        return arg0;
                    }

                    @Override
                    public View getView(int arg0, View arg1, ViewGroup arg2) {
                        // TODO Auto-generated method stub
                        ImageView i=new ImageView(context);

                        i.setLayoutParams(new GridView.LayoutParams(iwidth +5,iheight +5));
                        i.setPadding(0, 0, 0, 0);
                        i.setImageBitmap(duplicate.get(arg0));

                        return i;
                    }

                }
            }



can any one do the need for me as i have stuck here how to move the images among themselves 

Answer 1

首先按照@Terril Thomas的选择两张图片进行交换，

这里是交换List中两个Image的方法，

  public void swapImage(Bitmap i1,Bitmap i2){

    int position1,position2;
    position1 = duplicate.indexOf(i1);
    duplicate.remove(position1);
    position2 = duplicate.indexOf(i1);
    duplicate.remove(position2);

    if(position2>position1){
        duplicate.add(position2, i1);
        duplicate.add(position1, i2);
    }
    if(position2<position1){
        duplicate.add(position1, i2);
        duplicate.add(position2, i1);
    }
}

像这样改变onCreate

CutAdapter ca = new CutAdapter(this, breakedimages);
g.setAdapter(ca);

比刷新你的适配器

    ca.notifyDataSetChanged();