将包含uri路径的字符串转换为arraylist <uri>

时间:2018-11-18 18:34:35

标签: java android android-studio uri android-image

我正在创建一个记事本程序,用户可以在其中将图像添加到他的笔记中。当他创建新笔记并拾取一些图像时,它们的路径(uri)存储在arraylist中,该列表转换为xml标记(字符串类型转换)。当用户想要打开创建的注释时,从以前选择的图像会显示在gridview中。但是,当我尝试将字符串标记从xml文件转换为arraylist以便imageadapter可以将它们放入网格视图中时,出现转换类型错误。 edit 我得到的错误是-java.lang.String无法转换为android.net.Uri-

适配器是这个

`private Context ctx;
    private int pos;
    private LayoutInflater inflater;
    private ImageView ivGallery;
    ArrayList<Uri> mArrayUri;
    public GalleryAdapter(Context ctx, ArrayList<Uri> mArrayUri) {


        this.ctx = ctx;
        this.mArrayUri = mArrayUri;
    }

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

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

    @Override
    public long getItemId(int position) {
        return 0;
    }

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

        pos = position;
        inflater = (LayoutInflater) ctx
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        View itemView = inflater.inflate(R.layout.gv_item, parent, false);

        ivGallery = (ImageView) itemView.findViewById(R.id.ivGallery);

        ivGallery.setImageURI(mArrayUri.get(position));

        return itemView;
    }`

而我尝试将它们转换为数组并在网格视图中显示的方式是

`  String Paths = userData.get(1);


            ArrayList mArrayUri = new ArrayList<>(Arrays.asList(Paths.split(",")));
            galleryAdapter = new GalleryAdapter(getApplicationContext(),mArrayUri);
            gvGallery.setAdapter(galleryAdapter);
            gvGallery.setVerticalSpacing(gvGallery.getHorizontalSpacing());
            ViewGroup.MarginLayoutParams mlp = (ViewGroup.MarginLayoutParams) gvGallery
                    .getLayoutParams();
            mlp.setMargins(0, gvGallery.getHorizontalSpacing(), 0, 0);

`

xml创建代码是这个

` xmlSerializer.startDocument("UTF-8", true);
            xmlSerializer.startTag(null, "userData");
            xmlSerializer.startTag(null,"Text");
            xmlSerializer.text(NoteText);
            xmlSerializer.endTag(null, "Text");
            xmlSerializer.startTag(null,"Image Paths");
            xmlSerializer.text(String.valueOf(Gallery.ImagePaths));
            xmlSerializer.endTag(null,"Image Paths" );
            xmlSerializer.endTag(null, "userData");
            xmlSerializer.endDocument();`

1 个答案:

答案 0 :(得分:0)

您的代码非常好,只需将数组列表类型设置为字符串,然后将字符串值设为uri。

.text(String.valueof(Imagepath))中使用Uri.toString代替String valueof

示例:

Uri uri;
String myUriString;
myUriString = uri.toString();