<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.kill_attendance">
        <!-- 申請Android權限-->
    <!--網(wǎng)絡訪問-->
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

    <!-- Permissions options for the `contacts` group -->
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.WRITE_CONTACTS" />
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />

    <!-- Permissions options for the `storage` group -->
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <!-- Permissions options for the `camera` group -->
    <uses-permission android:name="android.permission.CAMERA" />

    <!-- Permissions options for the `location` group -->
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />

    <!-- Permissions options for the `microphone` or `speech` group -->
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
         <!-- app名稱,圖標 -->
    <application
        android:name="io.flutter.app.FlutterApplication"
        android:label="應用名稱"
        android:icon="@mipmap/icon">
        <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">
            <!-- This keeps the window background of the activity showing
                 until Flutter renders its first frame. It can be removed if
                 there is no splash screen (such as the default splash screen
                 defined in @style/LaunchTheme). -->
            <meta-data
                android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
                android:value="true" />
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
</manifest>

await Map<PermissionGroup, PermissionStatus> map= PermissionHandler().requestPermissions([ 權限列表])

PermissionStatus contactsPermStatus = await PermissionHandler().checkPermissionStatus(PermissionGroup.contacts);

  ///請求權限
  void _requestPermission() async {
    debugPrint("進入閃屏頁面");
    // 申請權限
    // PermissionStatus storageStatus ;
    PermissionStatus cameraStatus;

     await PermissionHandler().requestPermissions(
          [ PermissionGroup.camera]).then((value) {
             debugPrint("返回:$value");
            // storageStatus=value[PermissionGroup.storage];
            cameraStatus=value[PermissionGroup.camera];
          });
    debugPrint("請求權限,并獲取權限:$cameraStatus");

    //校驗權限
    if (cameraStatus == PermissionStatus.granted) {
      debugPrint("校驗權限:用戶都同意了");
      //用戶都同意了(用&&)
      ///權限都申請成功初始化閃屏
      _initSplash();
    } else if ( cameraStatus == PermissionStatus.denied) {
      debugPrint("校驗權限:有任何一組權限被用戶拒絕");
      //用戶拒絕了(用||)
      ///有任何一組權限被用戶拒絕
      //拼接提示權限文本
      StringBuffer sb = new StringBuffer();
      sb.write(cameraStatus == PermissionStatus.denied ? "相機," : "");
      String tip = Utils.removePostfix(sb.toString(), ",");

      Utils.showCustomDialog(
          context,
          ConfirmDialog(
            "您拒絕了應用的必要權限:\n[$tip],是否重新申請?",
            canBackDismiss: false,
            confirmCallback: () => _requestPermission(),
            cancelCallback: () => SystemNavigator.pop(),
          ));
    } else if (  cameraStatus == PermissionStatus.neverAskAgain) {
      debugPrint("校驗權限:有權限永久拒絕");
      //有權限永久拒絕(用||)
      ///有任何一組權限選了不再提示
      //拼接提示權限文本
      StringBuffer sb = new StringBuffer();
      sb.write(cameraStatus == PermissionStatus.neverAskAgain ? "相機," : "");
      String tip = Utils.removePostfix(sb.toString(), ",");

      Utils.showCustomDialog(
          context,
          ConfirmDialog(
            "您禁用了應用的必要權限:\n[$tip],請到設置里允許?",
            canBackDismiss: false,
            confirmText: "去設置",
            confirmCallback: () async {
              await PermissionHandler().openAppSettings(); //打開設置頁面
              SystemNavigator.pop();
            },
            cancelCallback: () => SystemNavigator.pop(),
          ));
    }

  }

await [權限列表].request();   //可以使用then,用權限獲取狀態(tài)

  ///請求權限
  void _requestPermission() async {
    debugPrint("進入閃屏頁面");
    // 申請權限
    // PermissionStatus cameraStatus;

    await [Permission.camera].request();
    // .then((value){
      //設置申請后的結果
        // cameraStatus=value[Permission.camera];
      // });
    //或者直接調(diào)用:
    debugPrint("請求權限,并獲取權限");
    if(await Permission.camera.isDenied){

    }
    
    //校驗權限
    if (await Permission.camera.isGranted) {
      debugPrint("校驗權限:用戶都同意了");
      //用戶都同意了(用&&)
      ///權限都申請成功初始化閃屏
      _initSplash();
    } else if ( await Permission.camera.isDenied) {
      debugPrint("校驗權限:有任何一組權限被用戶拒絕");
      //用戶拒絕了(用||)
      ///有任何一組權限被用戶拒絕
      //拼接提示權限文本
      StringBuffer sb = new StringBuffer();
      sb.write(await Permission.camera.isDenied? "相機," : "");
      String tip = Utils.removePostfix(sb.toString(), ",");

      Utils.showCustomDialog(
          context,
          ConfirmDialog(
            "您拒絕了應用的必要權限:\n[$tip],是否重新申請?",
            canBackDismiss: false,
            confirmCallback: () => _requestPermission(),
            cancelCallback: () => SystemNavigator.pop(),
          ));
    } else if ( await Permission.camera.isPermanentlyDenied) {
      debugPrint("校驗權限:有權限永久拒絕");
      //有權限永久拒絕(用||)
      ///有任何一組權限選了不再提示
      //拼接提示權限文本
      StringBuffer sb = new StringBuffer();
      sb.write( await Permission.camera.isPermanentlyDenied ? "相機," : "");
      String tip = Utils.removePostfix(sb.toString(), ",");

      Utils.showCustomDialog(
          context,
          ConfirmDialog(
            "您禁用了應用的必要權限:\n[$tip],請到設置里允許?",
            canBackDismiss: false,
            confirmText: "去設置",
            confirmCallback: () async {
              await openAppSettings(); //打開設置頁面
              SystemNavigator.pop();
            },
            cancelCallback: () => SystemNavigator.pop(),
          ));
    }

  }