byte[] GetImageFromText(string text, float fontSize)
{
//do make png image
//and returns byte array
}
I want to get a method like the one above.
thanks Lumis~
here is my final solution
float textSize = 30;
String text = "testing";
TextPaint tp = new TextPaint(TextPaint.ANTI_ALIAS_FLAG);
tp.setColor(Color.WHITE);
tp.setTextSize(textSize);
Rect bounds = new Rect();
tp.getTextBounds(text , 0, text.length(), bounds);
StaticLayout sl = new StaticLayout(text , tp, bounds.width()+5,
Layout.Alignment.ALIGN_NORMAL, 1f, 0f, false);
Bitmap bmp = Bitmap.createBitmap(bounds.width()+5, bounds.height()+5,
Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
sl.draw(canvas);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(CompressFormat.PNG, 100, stream);
byte[] image = stream.toByteArray();
You can do this drawing a text view into bitmap first, then you would have to save it as PNG into private app memory or SD card and send it. Here is an exmple how to convert text into bitmap: How to draw a TextView into a Bitmap (without ever beeing drawn on the display)
Related
I have a png image which I want to use as a frame for images in ImageView.
Sorry, it's white that's why invisible
Like this but with sides curved
What is the solution?
I've tried by converting png to patch 9, setting background of parent and source of image view, but none worked. Image doesn't fit inside.
I've done it using PorterDuff. Designed an extra image just with curved border and applied PorterDuff.Mode.SRC_OVER inside setImageResource of Custom Image View.
Here is the overriden function
#Override
public void setImageResource(int resId) {
Bitmap rawBmp = BitmapFactory.decodeResource(getContext().getResources(), resId);
Bitmap rawMask = BitmapFactory.decodeResource(getContext().getResources(), R.drawable.image_frame_arc_filled);
Bitmap rawBorderMask = BitmapFactory.decodeResource(getContext().getResources(), R.drawable.image_frame_arc);
Bitmap bmp = Bitmap.createScaledBitmap(rawBmp, rawBmp.getWidth(), rawBmp.getHeight(), true);
Bitmap mask = Bitmap.createScaledBitmap(rawMask, bmp.getWidth(), bmp.getHeight(), true);
Bitmap borderMask = Bitmap.createScaledBitmap(rawBorderMask, mask.getWidth(), mask.getHeight(), true);
Bitmap bitmap = Bitmap.createBitmap(mask.getWidth(), mask.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawBitmap(bmp, 0, 0, null);
Paint maskPaint = new Paint();
maskPaint.setXfermode(
new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
canvas.drawBitmap(mask, 0, 0, maskPaint);
maskPaint = new Paint();
maskPaint.setXfermode(
new PorterDuffXfermode(PorterDuff.Mode.SRC_OVER));
canvas.drawBitmap(borderMask, 0, 0, maskPaint);
this.setImageBitmap(bitmap);
}
I'm currently drawing a rectangle under a bitmap using the Canvas in Android. I am using the following code
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap bitmap = BitmapFactory.decodeFile(file.getPath(), options);
Bitmap b = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight() + 100, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
c.drawBitmap(bitmap, 0, 0, null);
Paint myPaint = new Paint();
myPaint.setColor(Color.rgb(0, 0, 0));
myPaint.setStrokeWidth(10);
Rect r = new Rect(0, bitmap.getHeight(), bitmap.getWidth(), bitmap.getHeight() + 100);
c.drawRect(r, myPaint);
Paint textPaint = new Paint();
textPaint.setTextSize(20);
textPaint.setColor(Color.WHITE);
textPaint.setTextAlign(Paint.Align.CENTER);
int width = r.width();
int numOfChars = textPaint.breakText(description,true,width,null);
int start = (altText.length()-numOfChars)/2;
c.drawText(description,start,start+numOfChars,r.exactCenterX(),r.exactCenterY(),textPaint);
iv.setImageBitmap(b);
The bitmap draws fine and the rectangle draws directly below it. The text draws centered inside the rectangle. My issue is that the text (which varies in length) draws outside the rectangle. What I would like to happen is have the text skip to a new line when it reaches the end of the rectangle (which is the same width as the bitmap)
This a xkcd comic reader, the alt text is the text I am trying to fit in the rectangle, the image is the comic itself which varies in width (and height)
This Example Work Correctly for conver text to image left align (TextPaint.Align.LEFT)
but when in change it to TextPaint.Align.RIGHT converted image was empty.
Convert text to image file on Android
this is my code:
final TextPaint textPaint = new TextPaint()
{
{
setColor(Color.rgb(0, 0, 0));
setTextAlign(TextPaint.Align.RIGHT);
setTextSize(textSize);
setTypeface(NormalFont(getApplicationContext()));
setAntiAlias(true);
}
};
final Rect bounds = new Rect();
textPaint.getTextBounds(text, 0, text.length(), bounds);
final Bitmap bmp = Bitmap.createBitmap(bounds.width(), bounds.height()+buttonPadding, Bitmap.Config.ARGB_8888); //use ARGB_8888 for better quality //RGB_565
final Canvas canvas = new Canvas(bmp);
canvas.drawText(text, 0, textSize, textPaint);
return bmp;
}
I got a problem with an Air Native Extension in Android.
The ANE receive a Bitmap from the Actionscript side, compress it in jpeg format and send it back to the Actionscript that will write it on the storage.
Everything is good but one last thing.
It seems that the channels order for Actionscript is different than in Android, so my compressed image have RED colors in place of BLUE.. here is the code:
Actionscript (I'm using a library called deng.fzip.FZipLibrary to get the bitmap from a zip package)
__image = __fl.getBitmapData(path);
__de = new DataExchange();
__ba = __de.bitmapEncode(__image) as ByteArray;
Android
...
try {
inputValue = (FREBitmapData)arg1[0];
inputValue.acquire();
int srcWidth = inputValue.getWidth();
int srcHeight = inputValue.getHeight();
Bitmap bm = Bitmap.createBitmap(srcWidth, srcHeight, Config.ARGB_8888);
bm.copyPixelsFromBuffer(inputValue.getBits());
ByteArrayOutputStream os = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG, 80, os);
compressed = os.toByteArray();
inputValue.release();
} catch (Exception e) {
e.printStackTrace();
}
try {
returnValue = FREByteArray.newByteArray();
returnValue.setProperty("length", FREObject.newObject(compressed.length));
returnValue.acquire();
ByteBuffer returnBytes = returnValue.getBytes();
returnBytes.put(compressed, 0, compressed.length);
returnValue.release();
}
...
Anyone have an idea on how to convert the red to blue in the android side before send the image back? Or it needs to be done in the actionscript side?
Thank you very much and regards,
Gianpiero
You can switch the colors like this:
(This code does not origin from me, unfortunately I forgot where I found it, so credit goes somewhere else)
private Bitmap m_encodingBitmap = null;
private Canvas m_canvas = null;
private Paint m_paint = null;
private final float[] m_bgrToRgbColorTransform =
{
0, 0, 1f, 0, 0,
0, 1f, 0, 0, 0,
1f, 0, 0, 0, 0,
0, 0, 0, 1f, 0
};
private final ColorMatrix m_colorMatrix = new ColorMatrix(m_bgrToRgbColorTransform);
private final ColorMatrixColorFilter m_colorFilter = new ColorMatrixColorFilter(m_colorMatrix);
...
try{
FREBitmapData as3Bitmap = (FREBitmapData)args[0];
as3Bitmap.acquire();
m_encodingBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
m_canvas = new Canvas(m_encodingBitmap);
m_paint = new Paint();
m_paint.setColorFilter(m_colorFilter);
m_encodingBitmap.copyPixelsFromBuffer(as3BitmapBytes);
as3Bitmap.release();
//
// Convert the bitmap from BGRA to RGBA.
//
m_canvas.drawBitmap(m_encodingBitmap, 0, 0, m_paint);
...
}
Hope that helps ... Timm
I have some question about water mark within android code!
Following code showed my idea about WaterMark!
However,It does not work normally.
e.g. only the image end with .png can be watered mark
Is there a scheme about water mark(.jpeg, .jpg, .wbmp, .bmp, .png or others)
protected static Bitmap getDrmPicture(Context context,String path){
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap originMap = BitmapFactory.decodeFile (path,options);
Bitmap waterMark = BitmapFactory.decodeResource(context.getResources(), R.drawable.close);
InputStream input;
byte[] b;
Bitmap waterMark = null;
try {
input = context.getResources().openRawResource(R.drawable.lock);
b = new byte[input.available()];
input.read(b);
waterMark = DecodeUtils.requestDecode(jc, b, null);
}catch(IOException e){
}
int w = originMap.getWidth();
int h = originMap.getHeight();
int ww = waterMark.getWidth();
int wh = waterMark.getHeight();
Bitmap newb = Bitmap.createBitmap(w, h,Bitmap.Config.ARGB_8888;);
Canvas cv = new Canvas(newb);
cv.drawBitmap(originMap, 0, 0, null);
cv.drawBitmap(waterMark, w - ww, h - wh, null);
cv.save(Canvas.ALL_SAVE_FLAG);
cv.restore();
return newb;
}
Thanks !
This is the code I use to apply watermark to a jpeg, it should work for you too,
public Bitmap applyWatermarkColorFilter(Drawable drawable) {
Bitmap image = ((BitmapDrawable)drawable).getBitmap();
Bitmap result = Bitmap.createBitmap(image.getWidth(), image.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(result);
canvas.drawBitmap(image, 0, 0, null);
Bitmap watermark = BitmapFactory.decodeResource(getResources(), R.drawable.watermark);
canvas.drawBitmap(watermark, image.getWidth()/2 - watermark.getWidth()/2,
image.getHeight()/2 - watermark.getHeight()/2,
null);
return result;
}
Basically after this u have to use Bitmap.compress(<arguments>) to get a jpg out of it.
Din't try for the other formats. May be it might be possible if you can extract the Bitmap out of them like how we do for jpg and png.
https://stackoverflow.com/questions/6756975/draw-multi-line-text-to-canvas
Measure height of multiline text
To center text vertically we need to know text height. Instantiate StaticLayout with text width according to your needs, for us it is simple the width of Bitmap/Canvas minus 16dp padding. The getHeight() then returns height of text.
Positioning text on Canvas
There are four simple steps to position text on Canvas:
Save the current matrix and clip with Canvas.save().
Apply translation to Canvas matrix with Canvas.translate(x,y).
Draw StaticLayout on Canvas with StaticLayout.draw(canvas).
Revert matrix translation with Canvas.restore() method.