在android应用中,有时候会用到系统通知是否开启的状态,以便进行下一步操作,所以,获取到状态是很有必要的,之前一直苦于找不到合适的方法来解决,因为毕竟涉及到系统,不好办,今日看到大神支招,试了一下,很好用,贴出来,大家看,干了这碗安利!
有图有真相,首先到设置里边关闭该应用的通知开关:
然后在应用中,点击按钮,获取状态:
这时候,回到设置里,打开通知按钮:
再次点击应用中的测试按钮,可以看到,通知已经可用了:
代码量很少,但是很精辟,就一个工具类,用到了java反射原理:
public class NotificationsUtils { private static final String CHECK_OP_NO_THROW = "checkOpNoThrow"; private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION"; public static boolean isNotificationEnabled(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; /* 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 = (int)opPostNotificationValue.get(Integer.class); return ((int)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; } }
投稿作者:赵伟伟
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