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://" + "")));

     }