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>