要做的事情，就是最多选择三张图片，在用户选择以后右上角会出来一个小X用来删除选中的图片，着里最多就只能选择上传三张。所以就选择了使用直接三个imgview

当上传一张的时候露出第二个添加图片，添加成功以后现在右上角的X
当上传第二张的时候要露出第三个添加图片，添加成功以后现在右上角的X
当点其中任意一个X以后，要自动缩进，这样就涉及到每一个X的处理方式有要稍微有点不一样
// 获得图片
try {
assert data != null;
imageUri = data.getData();
//该uri就是照片文件夹对应的uri
Bitmap bit = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
//获取选中图片的base64
//图片转base64
imgBase64 = ImageUtil.imageToBase64(bit);
//如果list里面不存在图片就最加，如果已经存在了就替换
if(baseList.size()<1){
baseList.add(imgBase64);
}else {
baseList.set(0,imgBase64);
}
vBinding.iv1.setImageBitmap(bit);
vBinding.ivDelete1.setVisibility(View.VISIBLE);
vBinding.iv2.setVisibility(View.VISIBLE);
} catch (Exception e) {
e.printStackTrace();
}

上面是从相册或者相机获取图片后的处理方法，都保存在了baseList里面，第二个和第三个和这个一样的，把判断修改一下就好

点击图片右上角的X的时候的处理，需要按照下标删掉图片

/**
* 在图片删除以后自定补位
* @param baseList
*/
private void imgInit(List baseList){
if(!UtilWant.isNull(baseList)){
switch (baseList.size()){
case 0:
vBinding.iv2.setVisibility(View.GONE);
vBinding.iv3.setVisibility(View.GONE);
vBinding.iv1.setVisibility(View.VISIBLE);
vBinding.iv1.setImageResource(R.mipmap.icon_add_img);

                vBinding.ivDelete1.setVisibility(View.GONE);
                vBinding.ivDelete2.setVisibility(View.GONE);
                vBinding.ivDelete3.setVisibility(View.GONE);
                break;
            case 1:
                vBinding.iv1.setImageBitmap(ImageUtil.stringToBitmap(baseList.get(0)));
                vBinding.iv2.setImageResource(R.mipmap.icon_add_img);
                vBinding.iv2.setVisibility(View.VISIBLE);
                vBinding.iv3.setVisibility(View.GONE);
                vBinding.ivDelete2.setVisibility(View.GONE);
                vBinding.ivDelete3.setVisibility(View.GONE);
                break;
            case 2:
                vBinding.iv1.setImageBitmap(ImageUtil.stringToBitmap(baseList.get(0)));
                vBinding.iv2.setImageBitmap(ImageUtil.stringToBitmap(baseList.get(1)));
                vBinding.iv3.setImageResource(R.mipmap.icon_add_img);
                vBinding.iv3.setVisibility(View.VISIBLE);
                vBinding.iv1.setVisibility(View.VISIBLE);
                vBinding.iv2.setVisibility(View.VISIBLE);
                vBinding.ivDelete1.setVisibility(View.VISIBLE);
                vBinding.ivDelete2.setVisibility(View.VISIBLE);
                vBinding.ivDelete3.setVisibility(View.GONE);
                break;
            case 3:
                break;
        }
    }else {
        vBinding.iv2.setVisibility(View.GONE);
        vBinding.iv3.setVisibility(View.GONE);
        vBinding.iv1.setVisibility(View.VISIBLE);
        vBinding.iv1.setImageResource(R.mipmap.icon_add_img);

        vBinding.ivDelete1.setVisibility(View.GONE);
        vBinding.ivDelete2.setVisibility(View.GONE);
        vBinding.ivDelete3.setVisibility(View.GONE);
    }
}

好了完事了，然后把baseList传给后台就可以了
代码写之前多想，想明白了写起来就胸有成竹了！

加油打工人！！！