Android把bitmap转为file类型 ，图片转base64**

Android后台需要file文件，把bitmap转为file类型

直接上代码

//将Bitmap类型的图片转化成file类型，便于上传到服务器
public File saveFile(Bitmap bm) throws IOException {
String fileName = new Date().getTime() + “”;
String path = Environment.getExternalStorageDirectory() + “/cads”;
File dirFile = new File(path);
if (!dirFile.exists()) {
dirFile.mkdir();
}
File myCaptureFile = new File(path + fileName);
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(myCaptureFile));
bm.compress(Bitmap.CompressFormat.JPEG, 80, bos);
bos.flush();
bos.close();
return myCaptureFile;

}

/**

• 吧图片转为base64
  */

public static String imageToBase64(Bitmap bitmap) {
String result = null;
ByteArrayOutputStream baos = null;
try {
if (bitmap != null) {
baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);

            baos.flush();
            baos.close();

            byte[] bitmapBytes = baos.toByteArray();
            result = Base64.encodeToString(bitmapBytes, Base64.DEFAULT);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (baos != null) {
                baos.flush();
                baos.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return result;
}