如何通过 android 数据库中存储的图像名称将图像设置为图像视图？

Question

我有一个 class 在数据库中获取两个字段（名称和图像）并将名称设置为文本视图并将图像设置为图像视图现在我的图像有问题，如何通过存储在数据库中的图像名称将图像设置为图像视图？请帮助我！

我的源代码：

public class ListMovie extends BaseAdapter {

    private Resources res = null;
    private Activity activity;
    private ArrayList<HashMap<String, String>> data;
    private LayoutInflater inflate;
    ViewHolder holder;

    public ListMovie(Activity a, ArrayList<HashMap<String, String>> d) {
        // TODO Auto-generated constructor stub

        activity = a;
        data = d;
        inflate = (LayoutInflater) activity
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return data.size();
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

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

    @Override
    public View getView(int arg0, View view, ViewGroup arg2) {
        // TODO Auto-generated method stub

        View v1 = view;

        if (v1 == null) {

            v1 = inflate.inflate(R.layout.item, null);
            holder = new ViewHolder();

            holder.txt_name = (TextView) v1.findViewById(R.id.item_name);

            holder.img = (ImageView) v1.findViewById(R.id.item_img);


            v1.setTag(holder);

        } else {

            holder = (ViewHolder) v1.getTag();

        }
        HashMap<String, String> song = new HashMap<String, String>();
        song = data.get(arg0);


        holder.txt_name.setText(song.get("name"));

        return v1;

    }
    static class ViewHolder {
        TextView txt_name;
        ImageView img;  
    }
}

Answer 1

您可以使用 Android Universal Image Loader library or ion 动态加载图像。

编辑：

试试这个 link。它有一个很好的例子来说明如何通过代码加载图像。

Answer 2

如果你的图片在 /res 文件夹中，你可以在 getView 中使用它：

int resourceId = res.getIdentifier(name, "drawable", 
   context.getPackageName());//initialize res and context in adapter's contructor
img.setImageResource(resourceId);

完整代码：

class ListMovie extends BaseAdapter {

    private Resources res = null;
    private Activity activity;
    private ArrayList<HashMap<String, String>> data;
    private LayoutInflater inflate;
    ViewHolder holder;

    public ListMovie(Activity a, ArrayList<HashMap<String, String>> d) {
        activity = a;
        data = d;
        inflate = (LayoutInflater) activity
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        res = a.getResources();
    }
    @Override
    public int getCount() {
        return data.size();
    }

    @Override
    public HashMap<String, String> getItem(int position) {
        return data.get(position);
    }

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

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

        if (view == null) {
            view = inflate.inflate(R.layout.item, null);
            holder = new ViewHolder();
            holder.txt_name = (TextView) view.findViewById(R.id.item_name);
            holder.img = (ImageView) view.findViewById(R.id.item_img);
            view.setTag(holder);

        } else {
            holder = (ViewHolder) view.getTag();
        }
        HashMap<String, String> song = new HashMap<String, String>();
        song = data.get(position);
        holder.txt_name.setText(song.get("name"));
        int resourceId = res.getIdentifier(image_name, "drawable",
                activity.getPackageName());//initialize res and context in adapter's contructor
        img.setImageResource(resourceId);
        return view;

    }
    static class ViewHolder {
        TextView txt_name;
        ImageView img;
    }
}

用您的图片名称更改 image_name

如何通过 android 数据库中存储的图像名称将图像设置为图像视图？

how to set image to image view by image name that stored in database in android?

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