如何创建一个自定义对话框，要求准许在黑莓 [英] how to create a custom dialog for asking permission in blackberry

问题描述

如何创建应用程序描述符请求允许在黑莓和存储自定义对话框。我已经创造了这个code，但我不能够让我们的自定义消息并获得异常未捕获的异常：无应用程序实例

 

类PermissionTest扩展的UIApplication {    私有静态的String [] = dialogChoice {退出};    静态布尔permissionsOk = FALSE;    //主要方法
    公共静态无效的主要（字串[] args）{
        _assertHasPermissions（）;
        PermissionTest该app =新PermissionTest（）;
        theApp.enterEventDispatcher（）;
    }    公共PermissionTest（）{
        如果（permissionsOk）
            。UiApplication.getUiApplication（）pushScreen（新的主屏幕（））;
        其他
            。UiApplication.getUiApplication（）pushScreen（新PermissionScreen（））;
    }    //要求授权
    私有静态无效_assertHasPermissions（）{        尝试{
            //捕捉权限的当前状态，并检查对
            // 要求。
            ApplicationPermissionsManager APM = ApplicationPermissionsManager
                    .getInstance（）;
            ApplicationPermissions原= apm.getApplicationPermissions（）;            //设置并附加理由提供商
            apm.addReasonProvider（
                    ApplicationDescriptor.currentApplicationDescriptor（），
                    新ReasonProvider（）{
                        公共字符串的getMessage（int i）以{
                            弦乐味精=我需要为了权限才能正常工作。
                            开关（ⅰ）{
                            案例ApplicationPermissions.PERMISSION_LOCATION_API：
                                味精=所需的基于位置的服务。
                                打破;
                            案例ApplicationPermissions.PERMISSION_BROWSER_FILTER：
                                味精=所需的基于位置的服务。
                                打破;
                            案例ApplicationPermissions.PERMISSION_EMAIL：
                                味精=所需的基于位置的服务。
                                打破;
                            }
                            返回味精;
                        }
                    }）;            如果（原
                    .getPermission（ApplicationPermissions.PERMISSION_LOCATION_API）== ApplicationPermissions.VALUE_ALLOW
                    ＆功放;＆安培;原版的
                            .getPermission（ApplicationPermissions.PERMISSION_BROWSER_FILTER）== ApplicationPermissions.VALUE_PROMPT
                    ＆功放;＆安培;原版的
                            .getPermission（ApplicationPermissions.VALUE_ALLOW）== ApplicationPermissions.VALUE_ALLOW）{
                permissionsOk = TRUE;
            }其他{
                //创建为每个权限的许可请求你
                //应用
                //需求。请注意，您不想列出所有可能的
                //许可
                //值，因为它提供了应用价值不大
                //或用户。
                //请只要求需要为您的权限
                //应用程序。
                ApplicationPermissions permRequest =新ApplicationPermissions（）;
                permRequest
                        .addPermission（ApplicationPermissions.PERMISSION_LOCATION_API）;
                permRequest
                        .addPermission（ApplicationPermissions.PERMISSION_BROWSER_FILTER）;
                permRequest
                        .addPermission（ApplicationPermissions.PERMISSION_EMAIL）;                permissionsOk = apm.invokePermissionsRequest（permRequest）;
            }            / *
             *如果（permissionsOk）{//什么都不做}其他{//退出
             * System.exit（0）; }
             * /}赶上（例外五）{
            UiApplication.getUiApplication（）的invokeLater（Runnable的新（）{
                公共无效的run（）{
                    Dialog.ask（
                            应用程序安装错误，请重新安装应用程序
                            dialogChoice，0）;
                }
            }）;
        }
    }
}


解决方案

您不能，apm.invokePermissionsRequest（）始终显示的默认对话框。

一个ReasonProvider只提供，如果权限设置为提示，显示在描述字符串和用户进行确认。

how to create a custom dialog for asking permission in blackberry and store in application Descriptor. i have created this code but i am not able get our custom message and getting Exception Uncaught Exception:no Application Instance.

class PermissionTest extends UiApplication {

    private static String[] dialogChoice = { "Exit" };

    static boolean permissionsOk = false;

    // main method
    public static void main(String[] args) {
        _assertHasPermissions();
        PermissionTest theApp = new PermissionTest();
        theApp.enterEventDispatcher();
    }

    public PermissionTest() {
        if (permissionsOk)
            UiApplication.getUiApplication().pushScreen(new HomeScreen());
        else
            UiApplication.getUiApplication().pushScreen(new PermissionScreen());
    }

    // ASK FOR PERMISSIONS
    private static void _assertHasPermissions() {

        try {
            // Capture the current state of permissions and check against the
            // requirements.
            ApplicationPermissionsManager apm = ApplicationPermissionsManager
                    .getInstance();
            ApplicationPermissions original = apm.getApplicationPermissions();

            // Set up and attach a reason provider
            apm.addReasonProvider(
                    ApplicationDescriptor.currentApplicationDescriptor(),
                    new ReasonProvider() {
                        public String getMessage(int i) {
                            String msg = "I need the permissions in order to work properly.";
                            switch (i) {
                            case ApplicationPermissions.PERMISSION_LOCATION_API:
                                msg = "Needed for location based services.";
                                break;
                            case ApplicationPermissions.PERMISSION_BROWSER_FILTER:
                                msg = "Needed for location based services.";
                                break;
                            case ApplicationPermissions.PERMISSION_EMAIL:
                                msg = "Needed for location based services.";
                                break;
                            }
                            return msg;
                        }
                    });

            if (original
                    .getPermission(ApplicationPermissions.PERMISSION_LOCATION_API) == ApplicationPermissions.VALUE_ALLOW
                    && original
                            .getPermission(ApplicationPermissions.PERMISSION_BROWSER_FILTER) == ApplicationPermissions.VALUE_PROMPT
                    && original
                            .getPermission(ApplicationPermissions.VALUE_ALLOW) == ApplicationPermissions.VALUE_ALLOW) {
                permissionsOk = true;
            } else {
                // Create a permission request for each of the permissions your
                // application
                // needs. Note that you do not want to list all of the possible
                // permission
                // values since that provides little value for the application
                // or the user.
                // Please only request the permissions needed for your
                // application.
                ApplicationPermissions permRequest = new ApplicationPermissions();
                permRequest
                        .addPermission(ApplicationPermissions.PERMISSION_LOCATION_API);
                permRequest
                        .addPermission(ApplicationPermissions.PERMISSION_BROWSER_FILTER);
                permRequest
                        .addPermission(ApplicationPermissions.PERMISSION_EMAIL);

                permissionsOk = apm.invokePermissionsRequest(permRequest);
            }

            /*
             * if (permissionsOk) { // do nothing } else { // exit
             * System.exit(0); }
             */} catch (Exception e) {
            UiApplication.getUiApplication().invokeLater(new Runnable() {
                public void run() {
                    Dialog.ask(
                            "Application install error, Please re-install application",
                            dialogChoice, 0);
                }
            });
        }
    }
}

解决方案

You can't, apm.invokePermissionsRequest() always shows the default dialog box.

A ReasonProvider only provides the description string that is displayed if the permission is set to PROMPT and the user has to confirm it.

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