Android获取应用通知栏权限,并跳转通知设置页面(全版本适配)

前言

现在一般应用都需要集成推送功能,给用户推送一些相关的消息,这就需要应用取得应用通知栏权限,但是目前国内大部分厂商默认都是不开启通知栏权限的,所以在需要的时候,就要先检测是否开启通知栏权限,如果未开启,则要引导用户去设置中打开通知栏权限。

获取是否开启通知栏权限

不多比比,直接上代码:

public class NotificationUtil {
    private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";
    private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";
    
    //调用该方法获取是否开启通知栏权限
    public static boolean isNotifyEnabled(Context context) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            return isEnableV26(context);
        } else {
            return isEnabledV19(context);
        }
    }

    /**
     * 8.0以下判断
     *
     * @param context api19  4.4及以上判断
     * @return
     */
    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    private static boolean isEnabledV19(Context context) {

        AppOpsManager mAppOps =
                (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);

        ApplicationInfo appInfo = context.getApplicationInfo();
        String pkg = context.getApplicationContext().getPackageName();
        int uid = appInfo.uid;
        Class appOpsClass = null;

        try {
            appOpsClass = Class.forName(AppOpsManager.class.getName());

            Method checkOpNoThrowMethod =
                    appOpsClass.getMethod(CHECK_OP_NO_THROW,
                            Integer.TYPE, Integer.TYPE, String.class);

            Field opPostNotificationValue = appOpsClass.getDeclaredField(OP_POST_NOTIFICATION);
            int value = (Integer) opPostNotificationValue.get(Integer.class);

            return ((Integer) checkOpNoThrowMethod.invoke(mAppOps, value, uid, pkg) ==
                    AppOpsManager.MODE_ALLOWED);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }


    /**
     * 8.0及以上通知权限判断
     *
     * @param context
     * @return
     */
    private static boolean isEnableV26(Context context) {
        ApplicationInfo appInfo = context.getApplicationInfo();
        String pkg = context.getApplicationContext().getPackageName();
        int uid = appInfo.uid;
        try {
            NotificationManager notificationManager = (NotificationManager)
                    context.getSystemService(Context.NOTIFICATION_SERVICE);
            Method sServiceField = notificationManager.getClass().getDeclaredMethod("getService");
            sServiceField.setAccessible(true);
            Object sService = sServiceField.invoke(notificationManager);

            Method method = sService.getClass().getDeclaredMethod("areNotificationsEnabledForPackage"
                    , String.class, Integer.TYPE);
            method.setAccessible(true);
            return (boolean) method.invoke(sService, pkg, uid);
        } catch (Exception e) {
            return true;
        }
    }
}

那么4.4以下的版本能否通过反射获取?答案是否定的!
我在stackoverflow上找到一个回答:
Android 4.1: How to check notifications are disabled for the application?

回答中说,在12年的IO大会上有人问了,项目负责人说不能

还有一点就是,回答在16年被编辑,v4包中加入的

NotificationManagerCompat.from(this).areNotificationsEnabled();

可以判断是否开启通知栏权限。

亲测,使用support v4:28.0.0使用此api可以全版本判断获取是否开启通知栏权限!

跳转通知设置页面

		Intent localIntent = new Intent();
        //直接跳转到应用通知设置的代码:
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {//8.0及以上
            localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
            localIntent.setData(Uri.fromParts("package", getPackageName(), null));
        } else if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {//5.0以上到8.0以下
            localIntent.setAction("android.settings.APP_NOTIFICATION_SETTINGS");
            localIntent.putExtra("app_package", getPackageName());
            localIntent.putExtra("app_uid", getApplicationInfo().uid);
        } else if (android.os.Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {//4.4
            localIntent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
            localIntent.addCategory(Intent.CATEGORY_DEFAULT);
            localIntent.setData(Uri.parse("package:" + getPackageName()));
        } else {
            //4.4以下没有从app跳转到应用通知设置页面的Action,可考虑跳转到应用详情页面,
            localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            if (Build.VERSION.SDK_INT >= 9) {
                localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
                localIntent.setData(Uri.fromParts("package", getPackageName(), null));
            } else if (Build.VERSION.SDK_INT <= 8) {
                localIntent.setAction(Intent.ACTION_VIEW);
                localIntent.setClassName("com.android.settings", "com.android.setting.InstalledAppDetails");
                localIntent.putExtra("com.android.settings.ApplicationPkgName", getPackageName());
            }
        }
        startActivity(localIntent);

好了,完结!

参考文章:
https://www.jianshu.com/p/2d0a9d5559fc
https://www.jianshu.com/p/757476ca3d67

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