graph TD;
    A[图像捕获] --> B[图像预处理]
    B --> C[二w码定位]
    C --> D[几何校正]
    D --> E[解码]
    E --> F[输出结果]
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// build.gradle
dependencies {
    implementation 'com.google.zxing:core:3.4.0'
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.9'
}

// MainActivity.java
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // QR code generation and scanning logic here.
    }
}

// QRCodeUtils.java
import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.common.BitMatrix;

import android.graphics.Bitmap;

public class QRCodeUtils {

    public static Bitmap generateQRCode(String text) throws WriterException {
        QRCodeWriter writer = new QRCodeWriter();
        BitMatrix bitMatrix = writer.encode(text, BarcodeFormat.QR_CODE, 512, 512);
        
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);

        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                bitmap.setPixel(x, y, bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE);
            }
        }
        return bitmap;
    }
}
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// QRCodeUtilsTest.java
import org.junit.Test;
import static org.junit.Assert.*;

public class QRCodeUtilsTest {

    @Test
    public void testGenerateQRCode() {
        try {
            Bitmap qrCode = QRCodeUtils.generateQRCode("https://example.com");
            assertNotNull(qrCode);
        } catch (WriterException e) {
            fail("QR Code generation failed");
        }
    }
}
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