flutter中如何获取app信息及设备信息，看这就够了

flutter中如何获取app信息及设备信息

app开发中不可避免要动态获取当前版本号、包名以及设备信息等，安卓原生可以使用如下方法
1 获取app VersionName：

    public static String getAppVersionName(final String packageName) {
        if (isSpace(packageName)) return "";
        try {
            PackageManager pm = Utils.getApp().getPackageManager();
            PackageInfo pi = pm.getPackageInfo(packageName, 0);
            return pi == null ? null : pi.versionName;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
            return "";
        }
    }

2 获取app VersionCode：

    public static int getAppVersionCode(final String packageName) {
        if (isSpace(packageName)) return -1;
        try {
            PackageManager pm = Utils.getApp().getPackageManager();
            PackageInfo pi = pm.getPackageInfo(packageName, 0);
            return pi == null ? -1 : pi.versionCode;
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
            return -1;
        }
    }

3 获取包名：

public static String getAppName(final String packageName) {
        if (isSpace(packageName)) return "";
        try {
            PackageManager pm = Utils.getApp().getPackageManager();
            PackageInfo pi = pm.getPackageInfo(packageName, 0);
            return pi == null ? null : pi.applicationInfo.loadLabel(pm).toString();
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
            return "";
        }
    }

以及获取设备信息：

  public static String getDevicesType() {
        model = android.os.Build.MODEL;//手机型号
        carrier = Build.MANUFACTURER;//手机厂商
        LogUtils.d("model== " + model + "       carrie=r=" + carrier);
        return carrier;
    }

那么在flutter项目中应该日和获取这些信息呢？
ok 直接上代码
首先添加两个依赖
package_info 和 device_info_plus（之前的device_info已经弃用）
在项目pubspec.yaml文件中添加

 package_info: ^2.0.2
  device_info_plus: ^8.2.2
  

在需要使用的分别导包
import ‘package:device_info_plus/device_info_plus.dart’;
import ‘package:package_info/package_info.dart’;
获取app信息：

  static Future<String> getAppInfo() async {
    PackageInfo packageInfo = await PackageInfo.fromPlatform();
    _appName = packageInfo.appName;
    _packageName = packageInfo.packageName;
    _version = packageInfo.version;
    _buildNumber = packageInfo.buildNumber;
    LogD("_appName=" +
        _appName +
        "   _packageName=" +
        _packageName +
        "    _version=" +
        _version);
    return _appName + _packageName + _version + _buildNumber;
  }

获取设备信息：

 //设备机型判断
  DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
  AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
  LogD('devices  model ： ${androidInfo.model}'); // e.g. "Moto G (4)"
  if (androidInfo.model == "手持端") {
    //todo  do something
  }

如果是ios设备则

IosDeviceInfo iosDeviceInfo = await deviceInfo.iosInfo;

运行结果如图：