问题描述

android canvas保存为图片在手机中打开是一片黑色

//保存
public void save()
{

    File sd=Environment.getExternalStorageDirectory();
    String path=sd.getPath()+"/paint";
    File file=new File(path);
    file.mkdir();
    Bitmap  bm  =  Bitmap.createBitmap(480, 800, Config.ARGB_8888);
    Canvas  canvas  =  new  Canvas(bm);
    Paint  p  =  new  Paint();
    canvas.drawRect(50,  50,  200,  200,  p);
    canvas.save(Canvas.ALL_SAVE_FLAG  );
    canvas.restore();

    String fileName = path+"19961234.jpg";
    FileOutputStream  fos  =  null;
    try  {
        fos  =  new  FileOutputStream(fileName);
        bm.compress(Bitmap.CompressFormat.PNG,  100,  fos);
        fos.flush();
        fos.close();
    }
    catch  (FileNotFoundException  e)
    {  

    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }  

}

解决方案

Android Canvas 保存为图片

解决方案二：

怎么回事啊？ 谁来帮帮我