Question

将bitmap图像设置为ImageView的源代码时遇到了一些问题。这是我正在使用的代码：

 BitmapFactory.Options options = new BitmapFactory.Options();
    options.inTempStorage = new byte[16*1024];

    String path = Environment.getExternalStorageDirectory()+"/Stampii/"+objectId+".png";
    Log.i("","path : "+path);

    b = BitmapFactory.decodeFile(path,options);
    if(b==null){
       Log.i("","Bitmap is null");
    }

viewFlow = (ViewFlow) findViewById(R.id.viewflow);
        viewFlow.setAdapter(new ImageAdapter(Cards.this, b),position);

这是我如何保存图像：

File myDir=new File("/sdcard/Stampii");
                    myDir.mkdirs();

                    String filename = objectId+".png";
                    File file = new File(myDir, filename);
                    FileOutputStream fos;


                    fos = new FileOutputStream(file);
                    fos.write(mediaCardBuffer);
                    fos.flush();
                    fos.close();

ImageAdapter：

ublic class ImageAdapter extends BaseAdapter {

private LayoutInflater mInflater;

private Bitmap bitmap;

public ImageAdapter(Context context, Bitmap image) {
    mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    bitmap = image;
}

@Override
public int getCount() {
    return 0;
}

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

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.image_item, null);
    }
    ((ImageView) convertView.findViewById(R.id.imgView)).setImageBitmap(bitmap);
    return convertView;
}}

图像在SD卡上，我可以看到它，名称和路径是正确的。它只是没有出现。任何想法都是我的错误？

Answer 1

我认为getView永远不会被调用，因为你的适配器返回你有0个项目。尝试返回您要显示的该位图的1或多个实例的计数。

Android将ImageView位图设置为源问题

1 个答案: