Android | 教你如何开发扫二维码功能

  这里就不啰嗦了，到官网下载和安装：Android studio官网下载链接，Android studio安装流程参考链接

  在application标签内添加对扫码页面的声明

  在启动扫码Activity的地方添加动态权限申请。

public void loadScanKitBtnClick(View view) {
    requestPermission(CAMERA_REQ_CODE, DECODE);
}
private void requestPermission(int requestCode, int mode) {
    ActivityCompat.requestPermissions(
            this,
            new String[]{Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE},
            requestCode);
}

  扫码格式通过setHmsScanTypes指定为QR码，小伙伴们如果需要支持其它码可以自己指定。

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    if (permissions == null || grantResults == null) {
        return;
    }
    if (grantResults.length < 2 || grantResults[0] != PackageManager.PERMISSION_GRANTED || grantResults[1] != PackageManager.PERMISSION_GRANTED) {
        return;
    }
    if (requestCode == CAMERA_REQ_CODE) {
        ScanUtil.startScan(this, REQUEST_CODE_SCAN_ONE, new HmsScanAnalyzerOptions.Creator().setHmsScanTypes(HmsScan.QRCODE_SCAN_TYPE).create());
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
   super.onActivityResult(requestCode, resultCode, data);
   if (resultCode != RESULT_OK || data == null) {
       return;
   }
   if (requestCode == REQUEST_CODE_SCAN_ONE) {
       HmsScan obj = data.getParcelableExtra(ScanUtil.RESULT);
       if (obj != null) {
           this.textView.setText(obj.originalValue);
       }
   }
}