Android 扫一扫功能 二维码 条形码

1.build.gradle中添加

compile 'com.google.zxing:core:3.2.1'

compile 'cn.bingoogolapple:bga-qrcodecore:1.1.7@aar'

compile 'cn.bingoogolapple:bga-zxing:1.1.7@aar'

2.AndroidMainfest中添加权限

、  

3.新建类QRActivity

/**

 * 二维码扫描类 

 * 二维码生成方法如下

 * QRCodeEncoder.syncEncodeQRCode(context:内容,size：图片大小)

 */

public class QRActivity extends AppCompatActivity implements QRCodeView.Delegate {

    private ZXingView mQRCodeView;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_qr);

        mQRCodeView = (ZXingView) findViewById(R.id.qr);

        if (ContextCompat.checkSelfPermission(this,

                Manifest.permission.CAMERA)

                != PackageManager.PERMISSION_GRANTED) {

            ActivityCompat.requestPermissions(this,

                    new String[]{Manifest.permission.CAMERA},

                    1);

        } else {

            mQRCodeView.startSpot();

            mQRCodeView.setDelegate(this);

        }

    }

    @Override

    protected void onStart() {

        super.onStart();

        //打开后置摄像头预览,但并没有开始扫描

        mQRCodeView.startCamera();

        //开启扫描框

        mQRCodeView.showScanRect();

        mQRCodeView.startSpot();

    }

    @Override

    protected void onStop() {

        mQRCodeView.stopCamera();

        super.onStop();

    }

    @Override

    public void onScanQRCodeSuccess(String result) {

        Toast.makeText(this, result, Toast.LENGTH_SHORT).show()；

    }

    @Override
    public void onScanQRCodeOpenCameraError() {
    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if (requestCode == 1) {
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //打开后置摄像头预览,但并没有开始扫描
                mQRCodeView.startCamera();
                //开启扫描框
                mQRCodeView.showScanRect();
                mQRCodeView.startSpot();
                return;
            }
        }
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

4.新建布局文件activity_qr

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

   

        android:id="@+id/qr"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        app:qrcv_animTime="1000"

        app:qrcv_borderColor="#00000000"

        app:qrcv_borderSize="1dp"

        app:qrcv_cornerColor="#ffffff"

        app:qrcv_cornerLength="20dp"

        app:qrcv_cornerSize="3dp"

        app:qrcv_maskColor="#33FFFFFF"

        app:qrcv_rectWidth="220dp"

        app:qrcv_scanLineColor="#ffffff"

        app:qrcv_scanLineSize="1dp"

        app:qrcv_topOffset="100dp" />