1.依赖

 implementation 'cn.bingoogolapple:bga-qrcode-zxing:1.3.6'

2.权限

<uses-permission android:name="android.permission.CAMERA" />

3.布局

<cn.bingoogolapple.qrcode.zxing.ZXingView
    android:id="@+id/scan_qr_code"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:qrcv_borderColor="#fff" 
    app:qrcv_borderSize="1dp"
    app:qrcv_cornerLength="20dp"
    app:qrcv_cornerColor="#ff00"
    app:qrcv_cornerSize="3dp"
    app:qrcv_maskColor="#33ffffff"
    app:qrcv_rectWidth="200dp"
    app:qrcv_scanLineColor="@color/colorPrimary"
    app:qrcv_scanLineSize="1dp"
    app:qrcv_topOffset="90dp"
    >
</cn.bingoogolapple.qrcode.zxing.ZXingView>

4.代码

扫描二维码

public class ScanQrCodeActivity extends AppCompatActivity implements QRCodeView.Delegate {

    @BindView(R.id.scan_qr_code)
    ZXingView scanQrCode;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scan_qr_code);
    ButterKnife.bind(this);
    //scanQrCode.setType(BarcodeType.CUSTOM,);
    //设置扫描二维码的代理
    scanQrCode.setDelegate(this);
    //显示扫描框
    scanQrCode.showScanRect();
    //隐藏扫描框
    //scanQrCode.hiddenScanRect();

    //打开后置摄像头开始预览，但是并未开始识别
    scanQrCode.startCamera();
    //关闭摄像头预览，并且隐藏扫描框
    //scanQrCode.stopCamera();

    //开始识别
    scanQrCode.startSpot();
    //停止识别
    //scanQrCode.stopSpot();

    //停止识别，并且隐藏扫描框
    //scanQrCode.stopSpotAndHiddenRect();

    // 显示扫描框，并开始识别
    scanQrCode.startSpotAndShowRect();

    //打开闪光灯
    //scanQrCode.openFlashlight();
    //关闭散网灯
    scanQrCode.closeFlashlight();

    //解析本地图片二维码。返回二维码图片里的内容 或 null
    //解析 Bitmap 二维码。返回二维码图片里的内容 或 null
    //scanQrCode.decodeQRCode("");
}

@Override
public void onScanQRCodeSuccess(String result) {
    Toast.makeText(ScanQrCodeActivity.this,result,Toast.LENGTH_SHORT).show();
}

@Override
public void onCameraAmbientBrightnessChanged(boolean isDark) {

}

@Override
public void onScanQRCodeOpenCameraError() {

}
}

制作二维码

public class MakeQrCodeActivity extends AppCompatActivity {

@BindView(R.id.make_value)
EditText makeValue;
@BindView(R.id.make_image)
Button makeImage;
@BindView(R.id.image)
ImageView image;
Handler handler=new Handler(){
    @Override
    public void handleMessage(Message msg) {
        super.handleMessage(msg);
        switch (msg.what){
            case 0:
                break;
        }
    }
};
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_make_qr_code);
    ButterKnife.bind(this);
}

@OnClick({R.id.make_image, R.id.image})
public void onViewClicked(View view) {
    switch (view.getId()) {
        case R.id.make_image:
            String make = makeValue.getText().toString().trim();
            makeQrImaae(make);
            break;
    }
}

private void makeQrImaae(final String make) {
    Bitmap bitmap = QRCodeEncoder.syncEncodeQRCode(make, 200);
    image.setImageBitmap(bitmap);
}
}