Using camera to take photo and save to gallery

问题

I have went through several documentation and stacks, however I'm not quite sure how do I implement this...

And help or sample codes would really help me understand more.

Here are the sets of codes that runs the camera and it's working perfectly fine, my next question is, how do I let it automatically saved into phone gallery?

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
        tvCameraTiles = (TextView) findViewById(R.id.tvCameraTiles);

        tvCameraTiles.setOnClickListener(new  View.OnClickListener()
        {
             @Override
             public void onClick(View v)
             {
                 dispatchTakePictureIntent();
             }
         });
    }

    private void dispatchTakePictureIntent()
    {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        if (takePictureIntent.resolveActivity(getPackageManager()) != null)
        {
            startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
        }
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK)
        {
            //Get Camera Image File Data
//            Bundle extras = data.getExtras();
//            Bitmap imageBitmap = (Bitmap) extras.get("data");
//            mImageView.setImageBitmap(imageBitmap);
        }
    }

回答1:

have you read this https://developer.android.com/training/camera/photobasics.html ?

Especially the part:

private void galleryAddPic() {
    Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
    File f = new File(mCurrentPhotoPath);
    Uri contentUri = Uri.fromFile(f);
    mediaScanIntent.setData(contentUri);
    this.sendBroadcast(mediaScanIntent);
}

You don't seem to save the photo in the external storage, so it should work.

EDIT: I tried to make a really basic application following the documentation with the method galleryAddPic.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button photoButton = (Button) findViewById(R.id.photobutton);
    photoButton.setOnClickListener(new  View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            dispatchTakePictureIntent();
        }
    });
}

static final int REQUEST_IMAGE_CAPTURE = 1;

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        //Bundle extras = data.getExtras();
        //Bitmap imageBitmap = (Bitmap) extras.get("data");
        //mImageView.setImageBitmap(imageBitmap);
        galleryAddPic();
    }
}

String mCurrentPhotoPath;

private File createImageFile() throws IOException {
    File storageDir = Environment.getExternalStorageDirectory();
    File image = File.createTempFile(
            "example",  /* prefix */
            ".jpg",         /* suffix */
            storageDir      /* directory */
    );
    mCurrentPhotoPath = image.getAbsolutePath();
    return image;
}

private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        File photoFile = null;
        try {
            photoFile = createImageFile();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        if (photoFile != null) {
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
            startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
        }
    }
}

private void galleryAddPic() {
    Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
    File f = new File(mCurrentPhotoPath);
    Uri contentUri = Uri.fromFile(f);
    mediaScanIntent.setData(contentUri);
    this.sendBroadcast(mediaScanIntent);
}

This is working for me! I take a picture using the camera app, and then it's showed in the gallery app. I modified the code regarding the FileProvider part, now it passes the Uri with the help of the method Uri.fromFile(photoFile). I save the photo in a different position too, check the code in the method createImageFile for this one.

In the Android Studio emulator is working fine, let me know about you.

回答2:

I tried out Rex B code snippet, but ended up getting a error on Android Studio.

 android.os.FileUriExposedException: file:///storage/emulated/0/example6941495009290613124.jpg exposed beyond app through ClipData.Item.getUri()

If anyone got this error, I found a simple fix

StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());

I added these two lines to the onClick method

  Button photoButton = (Button) findViewById(R.id.photobutton);
    photoButton.setOnClickListener(new  View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
        StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
        StrictMode.setVmPolicy(builder.build());
            dispatchTakePictureIntent();
        }
    });
}

I know this is old post, but I'm sure someone will come by this one day.

回答3:

First the file will be created and the ByteStream will be written on the file and saved. you don't do anything for this file to be present in the gallery. This will automatically refreshed by gallery.

来源：https://stackoverflow.com/questions/41777836/using-camera-to-take-photo-and-save-to-gallery