Android快速实现扫描二维码功能

先去把工程文件下下载
github

然后找到lib-zxing这个文件夹

在AndroidStudio中导入模块

选择刚刚那个文件夹即可
把这些参数改成和工程一样即可然后开始编译

中间还处理一些import包的问题，删掉然后重新导入即可

等到build完全没有错误即可
代码应用

 
    private void goScan(){
        startActivityForResult(new Intent(this, CaptureActivity.class),0);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode==RESULT_OK){
            Bundle bundle = data.getExtras();
            if (bundle != null) {
                String result=bundle.getString("result_string");
                System.out.println(result);
            }
        }
    }

    private void ScanPermissionGet(){
        //动态权限申请
        if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA}, 1);
        }else{
            goScan();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case 1:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    //扫码
                    goScan();
                } else {
                    Toast.makeText(this, "你拒绝了权限申请，无法打开相机扫码哟！", Toast.LENGTH_SHORT).show();
                }
                break;
            default:
        }
    }

然后就可以了