我想一个位图图像保存到我的手机里面的一个目录（库）。该应用程序正在开发中Xamarin所以code是C＃。

我似乎无法弄清楚如何创建一个目录，并保存位图。有什么建议？

 公共无效createBitmap（查看视图）{view.DrawingCacheEnabled = TRUE; view.BuildDrawingCache（真）;位图m_Bitmap = view.GetDrawingCache（真）;    字符串storagePath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;    java.io.File的storageDirectory =新的java.io.File（storagePath）;    //storageDirectory.mkdirs（）;    //保存位图    // MemoryStream的流=新的MemoryStream（）;    //m_Bitmap.Com$p$pss（Bitmap.Com pressFormat.Png，100，流）;    //stream.Close（）;    尝试{        串文件路径= storageDirectory.ToString（）+APPNAME.png;        FOS的FileOutputStream =新的FileOutputStream（文件路径）;        BOS的BufferedOutputStream =新的BufferedOutputStream（FOS）;        m_Bitmap.Com preSS（Bitmap.Com pressFormat.Png，100，BOS）;        bos.Flush（）;        bos.Close（）;    }赶上（Java.IO.FileNotFoundException E）{        的System.Console.WriteLine（FILENOTFOUND）;    }赶上（java.io.IOException异常五）{        的System.Console.WriteLine（IOException异常）;    } 

解决方案

这这里是一个超薄办法导出位图为 PNG -file使用SD卡仅 C＃的东西：

 无效ExportBitmapAsPNG（位图位图）{    VAR sdCardPath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;    变种文件路径= System.IO.Path.Combine（sdCardPathtest.png）;    VAR流=新的FileStream（文件路径，FileMode.Create）;    bitmap.Com preSS（Bitmap.Com pressFormat.Png，100，流）;    stream.Close（）;} 

I am trying to save a bitmap image to a directory (gallery) inside my phone. The app is being developed in Xamarin so the code is C#.

I cant seem to figure out how to make a directory, and save a Bitmap. Any suggestions?

public void createBitmap(View view){ view.DrawingCacheEnabled = true; view.BuildDrawingCache (true); Bitmap m_Bitmap = view.GetDrawingCache(true);

    String storagePath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
    Java.IO.File storageDirectory = new Java.IO.File(storagePath);
    //storageDirectory.mkdirs ();



    //save the bitmap
    //MemoryStream stream = new MemoryStream ();
    //m_Bitmap.Compress (Bitmap.CompressFormat.Png, 100, stream);
    //stream.Close();



    try{

        String filePath = storageDirectory.ToString() + "APPNAME.png";
        FileOutputStream fos = new FileOutputStream (filePath);
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        m_Bitmap.Compress (Bitmap.CompressFormat.Png, 100, bos);
        bos.Flush();
        bos.Close();
    } catch (Java.IO.FileNotFoundException e) {
        System.Console.WriteLine ("FILENOTFOUND");
    } catch (Java.IO.IOException e) {
        System.Console.WriteLine ("IOEXCEPTION");
    }

This here is a slim way to export a Bitmap as PNG-file to the sd-card using only C# stuff:

void ExportBitmapAsPNG(Bitmap bitmap)
{
    var sdCardPath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
    var filePath = System.IO.Path.Combine(sdCardPath, "test.png");
    var stream = new FileStream(filePath, FileMode.Create);
    bitmap.Compress(Bitmap.CompressFormat.Png, 100, stream);
    stream.Close();
}