zxing生成带logo的二维码

倒Zxing依赖

implementation 'cn.bingoogolapple:bga-qrcode-zxing:1.2.1'

代码段

import android.graphics.Bitmap;
import android.graphics.Matrix;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import java.util.Hashtable;
public class QRCode {

private static int MY_WIDTH = 50;//宽度值，影响中间图片大小

/**
 * 生成二维码，默认大小为500*500
 *
 * @param text 需要生成二维码的文字、网址等
 * @return bitmap
 */
public static Bitmap createQRCode(String text) {



    return createQRCode(text, 500);
}

/**
 * 生成二维码
 *
 * @param text 需要生成二维码的文字、网址等
 * @param size 需要生成二维码的大小（）
 * @return bitmap
 */
public static Bitmap createQRCode(String text, int size) {
    try {
        Hashtable<EncodeHintType, String> hints = new Hashtable<>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        BitMatrix bitMatrix = new QRCodeWriter().encode(text,
                BarcodeFormat.QR_CODE, size, size, hints);
        int[] pixels = new int[size * size];
        for (int y = 0; y < size; y++) {
            for (int x = 0; x < size; x++) {
                if (bitMatrix.get(x, y)) {
                    pixels[y * size + x] = 0xff000000;
                } else {
                    pixels[y * size + x] = 0xffffffff;
                }

            }
        }
        Bitmap bitmap = Bitmap.createBitmap(size, size,
                Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, size, 0, 0, size, size);
        return bitmap;
    } catch (WriterException e) {
        e.printStackTrace();
        return null;
    }
}

/**
 * 生成带logo的二维码，默认二维码的大小为500，logo为二维码的1/5
 *
 * @param text    需要生成二维码的文字、网址等
 * @param mBitmap logo文件
 * @return bitmap
 */
public static Bitmap createQRCodeWithLogo(String text, Bitmap mBitmap) {
    return createQRCodeWithLogo(text, 500, mBitmap);
}

/**
 * 生成带logo的二维码，logo默认为二维码的1/5
 *
 * @param text    需要生成二维码的文字、网址等
 * @param size    需要生成二维码的大小（）
 * @param mBitmap logo文件
 * @return bitmap
 */
public static Bitmap createQRCodeWithLogo(String text, int size, Bitmap mBitmap) {
    try {
        MY_WIDTH = size / 10;
        Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        /*
         * 设置容错级别，默认为ErrorCorrectionLevel.L
         * 因为中间加入logo所以建议你把容错级别调至H,否则可能会出现识别不了
         */
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        BitMatrix bitMatrix = new QRCodeWriter().encode(text,
                BarcodeFormat.QR_CODE, size, size, hints);

        int width = bitMatrix.getWidth();//矩阵高度
        int height = bitMatrix.getHeight();//矩阵宽度
        int halfW = width / 2;
        int halfH = height / 2;

        Matrix m = new Matrix();
        float sx = (float) 2 * MY_WIDTH / mBitmap.getWidth();
        float sy = (float) 2 * MY_WIDTH
                / mBitmap.getHeight();
        m.setScale(sx, sy);
        //设置缩放信息
        //将logo图片按martix设置的信息缩放
        mBitmap = Bitmap.createBitmap(mBitmap, 0, 0,
                mBitmap.getWidth(), mBitmap.getHeight(), m, false);

        int[] pixels = new int[size * size];
        for (int y = 0; y < size; y++) {
            for (int x = 0; x < size; x++) {
                if (x > halfW - MY_WIDTH && x < halfW + MY_WIDTH
                        && y > halfH - MY_WIDTH
                        && y < halfH + MY_WIDTH) {
                    //该位置用于存放图片信息
                    //记录图片每个像素信息
                    pixels[y * width + x] = mBitmap.getPixel(x - halfW
                            + MY_WIDTH, y - halfH + MY_WIDTH);
                } else {
                    if (bitMatrix.get(x, y)) {
                        pixels[y * size + x] = 0xff000000;
                    } else {
                        pixels[y * size + x] = 0xffffffff;
                    }
                }
            }
        }
        Bitmap bitmap = Bitmap.createBitmap(size, size,
                Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, size, 0, 0, size, size);
        return bitmap;
    } catch (WriterException e) {
        e.printStackTrace();
        return null;
    }
}
}

Activity里面要写的代码

public class MainActivity extends AppCompatActivity {

ImageView imageView;
Button button;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    imageView = findViewById(R.id.images);
    button = findViewById(R.id.button);


    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
	
            String contnet="啊哈"; //二维码的内容
            
            Bitmap bitmap = QRCode.createQRCodeWithLogo(contnet, 500,
                    BitmapFactory.decodeResource(getResources(), R.drawable.yan));
                    //用背景图接受二维码
            imageView.setImageBitmap(bitmap);
        }
    });
}
}

布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<Button
    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="生成二维码"/>

<ImageView
    android:id="@+id/images"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/yan"
    android:layout_centerInParent="true"
    />
</RelativeLayout>