将相机图像保存在手机记忆库中的自定义位置

Posted 2021-04-12

我正在尝试拍照并将其保存到手机记忆库中的自定义位置。每次我尝试将图像保存到application / data / data / [package]的默认位置。我想存储在自定义位置，如/ emulated / 0 / My_clicks /。我没有使用任何SD卡，所以我想将图像保存在手机内存中。当我在Google上搜索时，我将图像保存在SD卡上的公共文件夹中，而不是保存在自定义位置。

我的代码看起来像这样：

first fragment.Java

public void onCreateView(.....)
{
  // ...
        mphotobutton=(ImageButton)v.findViewById(R.id.crime_imagebutton);

        mphotobutton.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                Intent i = new Intent(getActivity(),SecondActivity.class);
                startActivityForResult(i,REQUEST_PHOTO);
            }
        });
  // ...

}

public void onActivityResult(int requestcode, int resultcode, Intent data)
{
        if(requestcode==REQUEST_PHOTO)   
        {

            String filename=data.getStringExtra(SecondFragment.EXTRA_PHOTO_FILENAME);
            if(filename!=null)
            {
                Log.d(TAG, "filenam: " + filename);

                Photo p =new Photo(filename);

                Log.i(TAG,"Crime: "+mCrime.getTitle() +" has a photo");


                BitmapDrawable b=null;

                if(p!=null)
                {
                    String path = getActivity().getFileStreamPath(p.getfilename()).getAbsolutePath();

                    b=PictureUtils.getScaledDrawable(getActivity(),path);
                }

                mphotoview.setImageDrawable(b);

            }

        }

}

second fragment.Java

public void onCreateView(....)
{
   // ...

    takepicturebutton.setOnClickListener(new View.OnClickListener(){
                    public void onClick(View v)
                    {
                        if(mcamera!=null)
                        mcamera.takePicture(mshuttercallback,null,mjpegcallback);
                    }
    });

  ...


}  //  onCreateView()

private Camera.ShutterCallback mshuttercallback= new Camera.ShutterCallback()
{
    public void onShutter()
            {
                    // display the progress indicator
                    mprogresscontainer.setVisibility(View.VISIBLE);
            }
};

private Camera.PictureCallback mjpegcallback=new Camera.PictureCallback()
{
    public void onPictureTaken(byte[] data, Camera camera)
    {
            //create a filename
             String filename= UUID.randomUUID().toString()+".jpg";

            // save the jpeg data to disk
            FileOutputStream os=null;
            boolean success=true;

            try
            {
                os=getActivity().openFileOutput(filename, Context.MODE_PRIVATE);
                os.write(data);
            }
            catch (Exception e)
            {
                Log.e(TAG,"Error writing to file "+filename,e);
                success=false;
            }
            finally
            {
                try
                {
                    if(os!=null)
                    os.close();
                }
                catch (Exception e)
                {
                    Log.e(TAG,"Error closing file "+filename,e);
                    success=false;
                }
            } // finally

            if(success)
            {
                Log.i(TAG, "JPEG saved at " + filename);
                Intent i = new Intent();
                i.putExtra(EXTRA_PHOTO_FILENAME,filename);
                getActivity().setResult(Activity.RESULT_OK,i);
            }
            else
                getActivity().setResult(Activity.RESULT_CANCELED);

            getActivity().finish();

    } // onPictureTaken()

};  // mjpegcallback

AnroidManifest.xml

<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera"/>

图片保存在名为SecondFragment.java的SecondActivity片段中。如何将图像保存到手机存储器中的自定义位置（例如：/ storage / emulated / 0 / my_click /）NOT IN SD CARD（我没有使用任何SD卡）？如何编码保存图像？

请帮我。

答案

Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS)将为您提供/ storage / emulated / 0 / Documents的路径。你还需要

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

请注意，对于Android，外部存储不是（必然）SD卡。

另一答案

最后我做出了解决方案....感谢Alex Cohn

查看上面的代码并与下面的代码进行比较

首先确保使用java代码在目录“/ storage / emulated / 0 /”中创建文件夹“My_c​​licks”或手动制作自己的...我手动完成

SecondFragment.java

private Camera.PictureCallback mjpegcallback=new Camera.PictureCallback()

{

    ......

    }
        public void onPictureTaken(byte[] data, Camera camera)
                {

                    String filename="MrCrime-"+new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date())+".jpg";

                    // save the jpeg data to disk
                    FileOutputStream os=null;
                    boolean success=true;


                    //  getExternalStorageDirectory()  ==>  this method return directory path "/storage/emulated/0/"  THANKS TO Alex Cohn
                    String imagepath=Environment.getExternalStorageDirectory()+"/My_clicks/"+filename;

                    File imagefile=new File(imagepath);

                    try
                    {

                        os=new FileOutputStream(imagefile);


                        //os=getActivity().openFileOutput(filename, Context.MODE_PRIVATE);
                        os.write(data);
                    }
                    catch(Exception e)
                    {
                        Log.e(TAG,"Error writing to file "+filename,e);
                        success=false;
                    }

            .........

} // mjpegcallback

FirstFragment.java

public void onActivityResult(int requestcode, int resultcode, Intent data)
{
        if(requestcode==REQUEST_PHOTO)   
        {

            String imagename=data.getStringExtra(SecondFragment.EXTRA_PHOTO_FILENAME);
            if(imagename!=null)
            {
                Log.d(TAG, "imagename: " + imagename);

                Photo p =new Photo(imagename);

                Log.i(TAG,"Crime: "+mCrime.getTitle() +" has a photo");

                //Photo p = mCrime.getphoto();
                BitmapDrawable b=null;

                if(p!=null)
                {
                    //String path = getActivity().getFileStreamPath(p.getfilename()).getAbsolutePath();

                     //String filename = p.getfilename();
                     String imagepath = Environment.getExternalStorageDirectory()+"/My_clicks/"+imagename;

                    b=PictureUtils.getScaledDrawable(getActivity(),imagepath);
                }

                mphotoview.setImageDrawable(b);

            }

        }

}

希望有人会帮助......