Question

我有一个图像列表路径。我想在Imageview中显示列表的所有图像。我试图在视图寻呼机中显示所有图像。为此，我在视图寻呼机中创建一个Imageview，但无法显示从列表到imageview的图像。任何人都可以帮助我如何实现它。

Answer 1

首先，您必须创建ArrayAdapter

   public class MyAdapter extends ArrayAdapter<String> {
    Context context;
    int layoutResourceId;
    ArrayList<String> pathToImage = null; 

    public NewsAdapter(Context context, int layoutResourceId, ArrayList<String> data) {
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        PurchaseHolder holder = null;

        if (row == null) {
            LayoutInflater inflater = ((Activity) context).getLayoutInflater();
            row = inflater.inflate(layoutResourceId, parent, false);
            holder = new PurchaseHolder();
            holder.iv=(ImageView)row.findViewById(R.id.iv_news_status);//your image view id in item.xml
            row.setTag(holder);
        } else {
            holder = (PurchaseHolder) row.getTag();
        }

   File imgFile = new  File(pathToImage.get(position);//your path to image
    if(imgFile.exists()){
     Bitmap myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
     holder.iv=.setImageBitmap(myBitmap);
     }
        return row;
    }

    private class PurchaseHolder {
        ImageView iv;

    }
}

在您的Activity类中创建下一个

MyAdapter adapter = new MyAdapter(MyActivity.this, R.layout.item, arrayListOfImagePath);
myListView.setAdapter(adapter);

如何使用listview，您可以在this教程中阅读。但是别忘了，你必须使用我在上面发布的适配器

如何在Android中的Imageview上显示列表项？

1 个答案: