这个方法可以说是网上特别多，所以我不多说，放在这里的主要原因是为了保存这个方法，今后需要用到时方便用，

/
//**

• 保存图片的另一种方式

• @param bitmap
  */

  private void saveTOSD(Bitmap bitmap) { // TODO Auto-generated method stub
  String sdStatus = Environment.getExternalStorageState();
  if(!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 检测sd是否可用
  Log.i("TestFile", "SD card is not avaiable/writeable right now.");
  return;
  }

  String name = new DateFormat().format("yyyyMMdd_hhmmss",Calendar.getInstance(Locale.CHINA))+ ".jpg";
  FileOutputStream b = null;

  File file = new File("/sdcard/myImage/");
  file.mkdirs();// 创建文件夹 String
  fileName = "/sdcard/myImage/"+name;

  try {
  b = new FileOutputStream(fileName);
  }
  bitmap.compress(Bitmap.CompressFormat.JPEG, 100, b);// 把数据写入文件 }
  catch (FileNotFoundException e)
  {
  e.printStackTrace();
  } finally {
  try {
  b.flush();
  b.close();
  }
  catch (IOException e){
  e.printStackTrace();
  }
  }
  }

还有一个方法：这个方法是保存图片，并且在相册中显示图片

public void saveImage(Bitmap bmp) {
File appDir = new File(Environment.getExternalStorageDirectory(), "Amu");
if(!appDir.exists()) {
appDir.mkdir();
}
String fileName = "Qiangzhi"+System.currentTimeMillis() + ".jpg";
File file = new File(appDir,fileName);
try {
FileOutputStream fos = new FileOutputStream(file);
bmp.compress(CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
}
catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();

    }

    //保存图片同时显示在相册中
    Toast.makeText(getApplicationContext(),"保存成功!",Toast.LENGTH_SHORT).show();
    Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
    Uri uri = Uri.fromFile(appDir);
    intent.setData(uri);
    getApplicationContext().sendBroadcast(intent);

}