将纯文本添加到从相机意图拍摄的照片中

Question

我有一个使用相机意图并将拍摄的照片保存到特定文件夹的应用程序。现在我还缺少一项功能，那就是在拍照后我应该添加纯文本（时间戳，图片 lower/upper 边框上的更多信息）并保存。

如何实现？我的代码如下

public void takePicture( View view)
{
    Intent intentCamera = new Intent();
    intentCamera.setAction(MediaStore.ACTION_IMAGE_CAPTURE);

    File photofile = null;
    try{
        photofile=createImageFile();
        intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photofile));
        startActivityForResult(intentCamera, ActivityStartamera);
        //Toast.makeText(this,Uri.fromFile(photofile).toString(), Toast.LENGTH_LONG).show();
    }
    catch (IOException e)
    {
        e.printStackTrace();
        Toast.makeText(this, "Error happened", Toast.LENGTH_LONG).show();
        imageFileName="";
    }
}

protected  void onActivityResult (int requestCode, int resultCode, Intent data)
{
    if(requestCode == ActivityStartamera && resultCode == RESULT_OK)
    {
        //
        //here i should add plain text to taken picture
        //
        Toast.makeText(this, "Picture taken", Toast.LENGTH_LONG).show();
    }
    else{
        image.delete();
    }
}

File createImageFile () throws IOException{
    String timeStamp = new SimpleDateFormat("MMyyyydd_HHmmss").format(new Date());
    imageFileName = "picture_"+timeStamp;

    storage = Environment.getExternalStoragePublicDirectory("PicturesForApp");
    if (!storage.exists())
    {
        Toast.makeText(this, "Folder made for pictures", Toast.LENGTH_LONG).show();
        storage.mkdirs();
    }
    image = new File(storage + "/" +imageFileName +".jpg");
    return image;
}

我试过类似 this 但不成功。

Answer 1

请使用这个方法，我相信它会对你有所帮助。

 public Bitmap addTextToImage(Bitmap src, String textToAddOnImage, int x, int y, int color, int alpha, int size, boolean underline) {
    int w = src.getWidth();
    int h = src.getHeight();
    Bitmap result = Bitmap.createBitmap(w, h, src.getConfig());

    Canvas canvas = new Canvas(result);
    canvas.drawBitmap(src, 0, 0, null);

    Paint paint = new Paint();
    paint.setColor(color);
    paint.setAlpha(alpha);
    paint.setTextSize(size);
    paint.setAntiAlias(true);
    paint.setUnderlineText(underline);
    canvas.drawText(textToAddOnImage, x, y, paint);

    return result;
}

像这样调用这个方法

// use this bitmap to show in imageView and you can also save the bitmap.

Bitmap bmp = addTextToImage(srcBitmap, "Mustanser Iqbal", 200, 200, Color.GREEN, 80, 24, false);

File f = new File(mediaStorageDir.getPath() + File.separator + "IMG_" + fileName + ".png");
FileOutputStream fos = new FileOutputStream(f);
bmp.compress(Bitmap.CompressFormat.PNG, 90, fos);

将纯文本添加到从相机意图拍摄的照片中

Add plain text to picture taken from camera intent

android

android-camera-intent