android – Convert String text to Bitmap-ThrowExceptions

Exception or error:

Is it possible to convert string text that is inside an EditText box into a Bitmap? In other words, is there any way to convert string text into a Bitmap that means the text will display as an image?

Below is my Code:

class TextToImage extends Activity {

    protected void onCreate(Bundle savedInstanceState) {
        //create String object to be converted to image
        String sampleText = "SAMPLE TEXT";
        String fileName = "Image";

        //create a File Object
        File newFile = new File("./" + fileName + ".jpeg");

        //create the font you wish to use
        Font font = new Font("Tahoma", Font.PLAIN, 11);

        //create the FontRenderContext object which helps us to measure the text
        FontRenderContext frc = new FontRenderContext(null, true, true);
    }
}
How to solve:

You can create a Bitmap of the appropriate size, create a Canvas for the Bitmap, and then draw your text into it. You can use a Paint object to measure the text so you’ll know the size needed for the bitmap. You can do something like this (untested):

public Bitmap textAsBitmap(String text, float textSize, int textColor) {
    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    paint.setTextSize(textSize);
    paint.setColor(textColor);
    paint.setTextAlign(Paint.Align.LEFT);
    float baseline = -paint.ascent(); // ascent() is negative
    int width = (int) (paint.measureText(text) + 0.5f); // round
    int height = (int) (baseline + paint.descent() + 0.5f);
    Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(image);
    canvas.drawText(text, 0, baseline, paint);
    return image;
}

###

try this :

    public static Bitmap drawText(String text, int textWidth, int textSize) {
// Get text dimensions
TextPaint textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG
| Paint.LINEAR_TEXT_FLAG);
textPaint.setStyle(Paint.Style.FILL);
textPaint.setColor(Color.BLACK);
textPaint.setTextSize(textSize);
StaticLayout mTextLayout = new StaticLayout(text, textPaint,
textWidth, Alignment.ALIGN_NORMAL, 1.0f, 0.0f, false);

// Create bitmap and canvas to draw to
Bitmap b = Bitmap.createBitmap(textWidth, mTextLayout.getHeight(), Config.RGB_565);
Canvas c = new Canvas(b);

// Draw background
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG
| Paint.LINEAR_TEXT_FLAG);
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.WHITE);
c.drawPaint(paint);

// Draw text
c.save();
c.translate(0, 0);
mTextLayout.draw(c);
c.restore();

return b;
}

###

String text = "Hello world!";
Bitmap b = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
c.drawBitmap(b, 0, 0, null);
TextPaint textPaint = new TextPaint();
textPaint.setAntiAlias(true);
textPaint.setTextSize(16.0F);
StaticLayout sl= new StaticLayout(text, textPaint, b.getWidth()-8, Alignment.ALIGN_CENTER, 1.0f, 0.0f, false);
c.translate(6, 40);
sl.draw(c);
return b

###

I’ve adapted @TedHopp‘s answer to ensure the image created is always square, which can be useful depending on where the image is to be displayed, such as in a NavigationDrawer icon or suchlike. The text is horizontally centered in the middle of the image.

public static Bitmap textAsBitmap(String text, float textSize, int textColor) {
    // adapted from https://stackoverflow.com/a/8799344/1476989
    Paint paint = new Paint(ANTI_ALIAS_FLAG);
    paint.setTextSize(textSize);
    paint.setColor(textColor);
    paint.setTextAlign(Paint.Align.LEFT);
    float baseline = -paint.ascent(); // ascent() is negative
    int width = (int) (paint.measureText(text) + 0.0f); // round
    int height = (int) (baseline + paint.descent() + 0.0f);

    int trueWidth = width;
    if(width>height)height=width; else width=height;
    Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas(image);
    canvas.drawText(text, width/2-trueWidth/2, baseline, paint);
    return image;
}

###

For only String I don’t know but,

You will get Bitmap image of the whole EditText not only String with this,

mEditText.setCursorVisible(false); 
mEditText.buildDrawingCache(); 
Bitmap bmp = Bitmap.createBitmap(mEditText.getDrawingCache()); 

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