ionic cordova相册插件和监听Android返回键

ionic混合开发调用Android系统相册，官方的cordova-image-picker插件在直接用的时候会在Android6.0以上的版本由于没有获得相应的存储权限而闪退。

• 解决方法一：

  • 在原有的cordova插件上面改动，添加了动态授权，我放在了github 用法和原来的相同。

      function getImgPicker() {
        var options = {
          maximumImagesCount: 1,
          width: 800,
          height: 800,
          quality: 80,
          title:'',
          message:'',
          outputType:1
        };
        window.imagePicker.getPictures(function (results) {
          vm.userInfo.Url = results[0];
          console.log(vm.userInfo.Url);
          vm.upload(vm.userInfo.Url);
        }, function (err) {
          publicMethod.showLoadingNoBackdrop('调取相册失败');
          console.log(angular.toJson(error, true));
        }, options);
      }
    

• 解决方法二：

  • 添加一个新的插件，专门获取所需的权限cordova-plugin-android-permissions，下面是用法。

      var permissions = cordova.plugins.permissions;
      permissions.hasPermission(permissions.CAMERA, checkPermissionCallback, null);
       
      function checkPermissionCallback(status) {
        if(!status.hasPermission) {
          var errorCallback = function() {
            console.warn('Camera permission is not turned on');
          }
          permissions.requestPermission(
            permissions.CAMERA,
            function(status) {
              if(!status.hasPermission) errorCallback();
            },
            errorCallback);
        }
      }
    

ionic 监听Android的返回键和双击退出程序(直接上代码)

$ionicPlatform.registerBackButtonAction(function (e) {
  e.preventDefault();
  //判断处于哪个页面时双击退出
  if ($location.path() == '/tab/home' || $location.path() == '/tab/activity' ||
    $location.path() == '/tab/person' || $location.path() == '/tab/share' || $location.path() == '/tab/study') {
    if ($rootScope.backButtonPressedOnceToExit) {
      ionic.Platform.exitApp();
    } else {
      $rootScope.backButtonPressedOnceToExit = true;
      $cordovaToast.show("再按一次退出系统", "short", "bottom");
      $timeout(function () {
        $rootScope.backButtonPressedOnceToExit = false;
      }, 2000);
    }
  } else if ($location.path() == '/blueprint-list' || $location.path() == '/megagame-list') {
    $state.go('tab.activity');   //此处判断当前所处的View,并返回到tab页
  } else if ($ionicHistory.backView()) {
    $ionicHistory.goBack();
  } else {
    if ($rootScope.backButtonPressedOnceToExit) {
      ionic.Platform.exitApp();
    } else {
      $rootScope.backButtonPressedOnceToExit = true;
      $cordovaToast.show("再按一次退出系统", "short", "bottom");
      $timeout(function () {
        $rootScope.backButtonPressedOnceToExit = false;
      }, 2000);
    }
  }
  return false;
}, 101);