Android 保存图片到相册

    /**
      * 保存图片到相册
      */
     public void saveImageToGallery(Bitmap mBitmap) {
         if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

             ToastUtils.showToast(CodeActivity.this, "sdcard未使用");
             return;
         }
         // 首先保存图片
         File appDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getAbsoluteFile();
         if (!appDir.exists()) {
             appDir.mkdir();
         }
         String fileName = System.currentTimeMillis() + ".jpg";
         File file = new File(appDir, fileName);
         try {
             FileOutputStream fos = new FileOutputStream(file);
             mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
             fos.flush();
             fos.close();
         } catch (FileNotFoundException e) {
             e.printStackTrace();
             return;
         } catch (IOException e) {
             e.printStackTrace();
             return;
         }

         // 其次把文件插入到系统图库
         try {
             MediaStore.Images.Media.insertImage(getApplication().getContentResolver(), file.getAbsolutePath(), fileName, null);
         } catch (FileNotFoundException e) {
             e.printStackTrace();
         } // 最后通知图库更新

         getApplication().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + "")));

     }