android如何把byte数据存到内存中并转为bitmap,求高手~~~~~~~~~~~~~~~~~~~~~~~~~~~

import javaioFile;
import androidappActivity;
import androidgraphicsBitmap;
import androidgraphicsBitmapFactory;
import androidosBundle;
import androidviewView;
import androidviewViewOnClickListener;
import androidwidgetImageView;
public class MainAct extends Activity {
private ImageView img;
//路径
private String filepath = "/sdcard/samplejpg";
@Override
public void onCreate(Bundle savedInstanceState) {
superonCreate(savedInstanceState);
setContentView(Rlayoutmain);
img = (ImageView) findViewById(Ridimg);
File file = new File(filepath);
if (fileexists()) {
Bitmap bm = BitmapFactorydecodeFile(filepath);
//将显示到ImageView中
imgsetImageBitmap(bm);
}
}
}
请参考

        //using SystemDrawing;
        //using SystemDrawingImaging;
        private void button1_Click(object sender, EventArgs e)
        {
            //用法
            F(textBox1, @"D:\1jpg");
            MessageBoxShow("ok");
        }
        /// <summary>
        /// 保存控件
        /// </summary>
        /// <param name="c">控件</param>
        /// <param name="f">文件名</param>
        public static void F(Control c, string f)
        {
            Bitmap i = new Bitmap(cWidth, cHeight);
            cDrawToBitmap(i, cClientRectangle);
            iSave(f, ImageFormatJpeg);
        }

InputStream is = getResources()openRawResource(Rdrawableicon);
Bitmap mBitmap = BitmapFactorydecodeStream(is);

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