在重新启动手机之前,Android自定义相机应用图片不会显示在图库中

Question

我一直在研究相机应用程序,我希望它是当我按下"捕获"按钮它拍照并将其保存到SD卡,以便可以在库中查看.

然而,目前它无法保存我想要的方式.目前,当我按下捕获时,它会拍照,但是在完全重新启动手机后,图片才显示在图库中.

这个问题一直困扰着我好几个星期,我大多数都遵循了android给出的教程.

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cat显示以下内容

级别:E标签:相机文本:CAMERA_MSG_RAW_IMAGE的handlemessage中

我的权限是

uses-permission android:name="android.permission.CAMERA"
uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" 

任何帮助深表感谢.谢谢

Answer 1

这个问题是Image的副本,保存到sdcard,没有出现在Android的Gallery应用程序中(特别是ShadowGod的回答)

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

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