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;
}
}