将字符串文本转换为位图 [英] Convert String text to Bitmap
本文介绍了将字符串文本转换为位图的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
是否可以将 EditText
框中的字符串文本转换为位图?换句话说,有什么方法可以将字符串文本转换为位图,这意味着文本将显示为图像?
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?
下面是我的代码:
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);
}
}
推荐答案
您可以创建一个适当大小的 Bitmap,为 Bitmap 创建一个 Canvas,然后将您的文本绘制到其中.您可以使用 Paint 对象来测量文本,以便了解位图所需的大小.你可以做这样的事情(未经测试):
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;
}
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