Question

我想保持简短。我已经将GridAdapter设置为Gridview。 Unfortunatley我不是使用标准的图片路径，而是使用我自己创建的一些。

这是我的ImageAdapter - 在视图下你会看到-imageView.setImageBitmap（extractThumbnail（bm，10,10））; - 此行仅刷新当前图像视图...如何使用Contructor View下的循环为每张图片创建图像视图？ - 光标对我不起作用我认为，它们只能处理预定义的内容URI。

我很乐意得到一些帮助。坦克你提前

private class ImageAdapter extends BaseAdapter {
    private Context mContext;

    public ImageAdapter(Context c) {
        mContext = c;
    }

    public int getCount() {
        return 1;
    }

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

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

    // create a new ImageView for each item referenced by the Adapter
    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {  // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(8, 8, 8, 8);
        } else {
            imageView = (ImageView) convertView;
        }

        File f = new File(IMAGE_DIRECTORY);
        File[] files = f.listFiles();
        imageView.setImageURI(Uri.parse(Environment.getExternalStorageDirectory()+"/MyDir/"));
        for(int i=0; i<files.length; i++){
            Bitmap bm = BitmapFactory.decodeFile(IMAGE_DIRECTORY + File.separator + files[i].getName());

            imageView.setImageBitmap(extractThumbnail(bm, 10, 10));

        }
         return imageView;
    }
}

Answer 1

我有同样的问题并以这种方式解决了。我希望有所帮助。

public class ImageAdapter extends BaseAdapter {

    private Context mContext;
    private Bitmap[]mis_fotos;

    public ImageAdapter(Context c) {
        mContext = c;    }

    public int getCount() {
        get_images();
        return mis_fotos.length;
        }

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

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

    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(200, 150));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setPadding(0, 0, 0, 0);
        } else {
            imageView = (ImageView) convertView;
        }
        imageView.setImageBitmap(mis_fotos[position]);
        return imageView;
    }

    private void get_images(){
        File directory = new File(Variables.PATH_FOTOS);   

        File[] archivos =directory.listFiles();
        mis_fotos= new Bitmap[archivos.length];

        for (int cont=0; cont<archivos.length;cont++){

            File imgFile = new  File(archivos[cont].toString());                
            mis_fotos[cont] = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
        }   
    }
}

Image Adapter将ImageViews动态添加到没有Cursor的GridView

1 个答案: