Android自定义摄像头应用程序图片在我重新启动手机之前不会出现在多媒体资料中

我一直在开发一个摄像头应用程序，我希望当我按下“捕获”按钮时，它会拍摄一张照片并保存到SD卡，以便在多媒体资料中查看

然而，目前它无法保存我希望它如何保存。当前，当我按“捕获”时，它会拍摄照片，但只有在我完全重新启动手机后，照片才会显示在多媒体资料中

这个问题困扰了我好几个星期，我主要是按照安卓提供的教程

这是我处理图片的主类的代码

 private PictureCallback mPicture = new PictureCallback() 
   {

    @Override
    public void onPictureTaken(byte[] data, Camera camera)
      {
        File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
        if (pictureFile == null){
           Log.d(TAG, "Error creating media file, check storage permissions: ");
            return;
        }

        try {
            FileOutputStream fos = new FileOutputStream(pictureFile);
            fos.write(data);
            fos.close();
        } catch (FileNotFoundException e) {
          //  Log.d(TAG, "File not found: " + e.getMessage());
        } catch (IOException e) {
        //    Log.d(TAG, "Error accessing file: " + e.getMessage());
        }
    }
};


private static File getOutputMediaFile(int type){
    // To be safe, you should check that the SDCard is mounted
    // using Environment.getExternalStorageState() before doing this.

    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
              Environment.DIRECTORY_PICTURES), "MyCameraApp");
    // This location works best if you want the created images to be shared
    // between applications and persist after your app has been uninstalled.

    // Create the storage directory if it does not exist
    if (! mediaStorageDir.exists()){
        if (! mediaStorageDir.mkdirs()){
            Log.d("MyCameraApp", "failed to create directory");
            return null;
        }
    }

    // Create a media file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    File mediaFile;
    if (type == MEDIA_TYPE_IMAGE){
        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
        "IMG_"+ timeStamp + ".jpg");
    } else if(type == MEDIA_TYPE_VIDEO) {
        mediaFile = new File(mediaStorageDir.getPath() + File.separator +
        "VID_"+ timeStamp + ".mp4");
    } else {
        return null;
    }

    return mediaFile;
}

public void onClick(View v) {

    mCamera.takePicture(null, null, mPicture);
    Context context = getApplicationContext();
    CharSequence text = "Click Detected";
    int duration = Toast.LENGTH_SHORT;

    Toast toast = Toast.makeText(context, text, duration);
    toast.show();

  }

单击“捕获”时，我的日志猫显示以下内容

级别：E 标签：照相机 文本：在照相机的handlemessage\u MSG\u RAW\u图像中

我的权限是

---

非常感谢您的帮助。谢谢

这个问题是重复的（尤其是阴影神的答案）

要修复代码，请在fos.close（）之后将以下内容添加到onPictureTaken

似乎对KITKAT不起作用。它引发权限拒绝异常并使应用程序崩溃。为此，我做了如下工作：

String path = mediaStorageDir.getPath() + File.separator
                + "IMG_Some_name.jpg";
CameraActivity.this.sendBroadcast(new Intent(
                         Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri
                        .parse("file://" + path)));

---

希望有帮助。

MediaScannerConnection可以使用KitKat中的视频或图像、示例和代码更新多媒体资料，如所示：

---

在KITKAT上不起作用。如果有解决办法，请提供帮助？

File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(
    Environment.DIRECTORY_PICTURES), "MyCameraApp");
sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, 
    Uri.parse("file://"+ mediaStorageDir)));

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"+ Environment.getExternalStorageDirectory())));

String path = mediaStorageDir.getPath() + File.separator
                + "IMG_Some_name.jpg";
CameraActivity.this.sendBroadcast(new Intent(
                         Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri
                        .parse("file://" + path)));