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compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

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public Bitmap encodeBitmap(String contents, BarcodeFormat format, int width, int height, Map<EncodeHintType, ?> hints) throws WriterException

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package com.example.xianyu;
import android.graphics.Bitmap;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.journeyapps.barcodescanner.BarcodeEncoder;
import java.util.HashMap;
import java.util.Map;

public class  QRcode{
   public Bitmap qrcode(String content){
    int width = 400;
    int height = 400;
       //HashMap设置二维码参数
       Map map = new HashMap();
       //   设置容错率 L>M>Q>H  等级越高扫描时间越长,准确率越高
       map.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
       //设置字符集
       map.put(EncodeHintType.CHARACTER_SET,"utf-8");
       //设置外边距
       map.put(EncodeHintType.MARGIN,1);
       //利用编码器，生成二维码
       BarcodeEncoder barcodeEncoder = new BarcodeEncoder();
       Bitmap bitmap = null;
       try {
           bitmap = barcodeEncoder.encodeBitmap(content, BarcodeFormat.QR_CODE, width, height,map);
       } catch (WriterException e) {
           e.printStackTrace();
       }
       return  bitmap;
    }
}

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public class MainActivity extends AppCompatActivity {
 ImageView Code;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Code = findViewById(R.id.iv_code);
        QRcode qrcode = new QRcode();
        Bitmap  bitmap= qrcode.qrcode("CSDN");
        Code.setImageBitmap(bitmap);
        }

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IntentIntegrator.parseActivityResult(requestCode, resultCode, data);

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public static IntentResult parseActivityResult(int requestCode, int resultCode, Intent intent) {
        if (requestCode == REQUEST_CODE) {
            return parseActivityResult(resultCode, intent);
        }
        return null;
    }

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Code.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View view) {
              Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
              startActivityForResult(intent,REQUEST_CODE);
          }
      });

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@Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
            IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
        if(result != null) {
            if(result.getContents() == null) {
                Toast.makeText(this, "Cancelled", Toast.LENGTH_LONG).show();
            } else {
                Toast.makeText(this, "Scanned: " + result.getContents(), Toast.LENGTH_LONG).show();
            }
        } else {
            super.onActivityResult(requestCode, resultCode, data);
        }
        }

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喜欢Android的可以给我点个关注，不断更新干货