public class MainActivity extends AppCompatActivity implements QRCodeView.Delegate {

  private ZXingView zXingView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    zXingView = (ZXingView) findViewById(R.id.zxingview);
    zXingView.setDelegate(this);//接收返回值
    zXingView.startSpotAndShowRect();//显示扫描框，并且延迟1.5秒后开始识别
  }

  @Override
  public void onScanQRCodeSuccess(String result) {//二维码返回的信息
    Log.i("zhh", "result:" + result);
    Toast.makeText(this, result, Toast.LENGTH_SHORT).show();
    vibrate();//兼容API23
    zXingView.startSpot();
  }

  @Override
  public void onScanQRCodeOpenCameraError() {
    Log.e("zhh", "打开相机出错");
    Toast.makeText(this, "打开相机出错", Toast.LENGTH_SHORT).show();
    finish();
  }


  @Override
  protected void onStart() {
    super.onStart();
    zXingView.startCamera();
  }

  @Override
  protected void onStop() {
    zXingView.stopCamera();
    super.onStop();
  }

  private void vibrate() {
    Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
    vibrator.vibrate(200);
  }

  @Override
  protected void onDestroy() {
    zXingView.onDestroy();
    super.onDestroy();
  }
}

<?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="com.zhh.test.MainActivity">

  <com.zhh.test.qrcode.ZXingView
    android:id="@+id/zxingview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:qrcv_animTime="1000"
    app:qrcv_barcodeRectHeight="220dp"
    app:qrcv_borderColor="@android:color/white"
    app:qrcv_borderSize="0px"
    app:qrcv_cornerColor="@color/colorPrimaryDark"
    app:qrcv_cornerLength="20dp"
    app:qrcv_cornerSize="3dp"
    app:qrcv_isBarcode="false"
    app:qrcv_isOnlyDecodeScanBoxArea="true"
    app:qrcv_isScanLineReverse="true"
    app:qrcv_isShowDefaultGridScanLineDrawable="true"
    app:qrcv_isShowDefaultScanLineDrawable="false"
    app:qrcv_isShowTipBackground="true"
    app:qrcv_isShowTipTextAsSingleLine="false"
    app:qrcv_isTipTextBelowRect="true"
    app:qrcv_maskColor="#88000000"
    app:qrcv_qrCodeTipText="将二维码放入框内，即可自动扫描"
    app:qrcv_rectWidth="200dp"
    app:qrcv_scanLineColor="@color/colorPrimaryDark"
    app:qrcv_scanLineMargin="0dp"
    app:qrcv_scanLineSize="1dp"
    app:qrcv_tipTextColor="@android:color/white"
    app:qrcv_tipTextSize="12sp"
    app:qrcv_toolbarHeight="56dp"
    app:qrcv_topOffset="90dp" />
</RelativeLayout>