Android判断当前应用通知是否打开，跳转到打开通知界面

判断当前应用通知是否打开方法：

private boolean isNotificationEnabled(Context context) {  
  
        String CHECK_OP_NO_THROW = "checkOpNoThrow";  
        String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";  
          
       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;  
     /* Context.APP_OPS_MANAGER */  
       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 (ClassNotFoundException e) {  
           e.printStackTrace();  
       } catch (NoSuchMethodException e) {  
           e.printStackTrace();  
       } catch (NoSuchFieldException e) {  
           e.printStackTrace();  
       } catch (InvocationTargetException e) {  
           e.printStackTrace();  
       } catch (IllegalAccessException e) {  
           e.printStackTrace();  
       }  
       return false;  
   } 

返回值为true时，通知栏打开，false未打开。

跳转设置页面：

private void goToSet(){  
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.BASE) {  
            // 进入设置系统应用权限界面  
            Intent intent = new Intent(Settings.ACTION_SETTINGS);  
            startActivity(intent);  
            return;  
        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {// 运行系统在5.x环境使用  
            // 进入设置系统应用权限界面  
            Intent intent = new Intent(Settings.ACTION_SETTINGS);  
            startActivity(intent);  
            return;  
        }  
    }