注：参数content为生成二维码bitmap的内容，该二维码bitmap在和文本title组合生成一个新的bitmap
package info.ecloud.merchant.util;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.journeyapps.barcodescanner.BarcodeEncoder;
import java.util.Hashtable;
public class SaveImageUtils {
private static final String CHARSET = "UTF-8";
/**
* 生成图片 加上title的图片
* @param content
* @param title
* @return
*/
public static Bitmap createImage(String content,String title) {
int picWidth = 520;//生成图片的宽度
int picHeight = 565;//生成图片的高度
int titleTextSize = 25;
int textColor = Color.BLACK;
int qrWidth = 370;
int qrHeight = 370;
int paddingTop = 5;
int paddingMiddle = 20;
int paddingBottom = 20;
//最终生成的图片
Bitmap result = Bitmap.createBitmap(picWidth,picHeight,Bitmap.Config.ARGB_8888);
Paint paint = new Paint();
paint.setColor(Color.WHITE);
Canvas canvas = new Canvas(result);
//先画一整块白色矩形块
canvas.drawRect(0,0,picWidth,picHeight,paint);
//画title文字
Rect bounds = new Rect();
paint.setColor(textColor);
paint.setTextSize(titleTextSize);
//获取文字的字宽高，以便将文字与图片中心对齐
paint.getTextBounds(title,0,title.length(),bounds);
//画白色矩形块
int qrTop = paddingTop+titleTextSize+paddingMiddle;//二维码的顶部高度
//画二维码
Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
hints.put(EncodeHintType.MARGIN, 5);
Bitmap image = null;
try {
BarcodeEncoder barcodeEncoder = new BarcodeEncoder();
image = barcodeEncoder.encodeBitmap((String) content, BarcodeFormat.QR_CODE, 400, 400);
} catch (Exception e) {
e.printStackTrace();
}
paint.setColor(Color.BLACK);
canvas.drawBitmap(image,(picWidth-qrWidth)/2,qrTop,paint);
//画文字
paint.setColor(Color.BLACK);
paint.setTextSize(titleTextSize);
int line = 3;
int textTop = qrTop+qrHeight+paddingBottom;//地址的顶部高度
for (int i = 0 ; i < line ; i++){
String[] split = title.split("-");
paint.getTextBounds(title,0,split[i].length(),bounds);
canvas.drawText(split[i],picWidth/2-bounds.width()/2,textTop+i*titleTextSize+i*5+bounds.height()/2,paint);
}
canvas.save();
canvas.restore();
return result;
}
}
