在 Android 设置中,如果用户不想,可以关闭通知。那么有没有像
isNotificationAllowed()
这样的方法来检查我的应用程序是否允许显示通知?以及如何打开android设置页面来引导我的用户打开通知?
编辑-新答案:
Google 似乎添加了正确的 API 调用:
NotificationManagerCompat.from(context).areNotificationsEnabled()
旧答案:
对于正在查看此问题的任何人,请注意 NotificationListenerService 不同于“显示通知”。 这两个是不同的东西!如果应用程序有权访问
NotificationListenerService
并不意味着会显示其通知,反之亦然。为了检查用户是否阻止了来自您应用的通知,您可以使用反射:
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() {
AppOpsManager mAppOps = (AppOpsManager) GlobalContext.getContext().getSystemService(Context.APP_OPS_SERVICE);
ApplicationInfo appInfo = GlobalContext.getContext().getApplicationInfo();
String pkg = GlobalContext.getContext().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;
}
}
NotificationManagerCompat.from(context).areNotificationsEnabled()
似乎是一条路要走。
这里是这个问题更完整的答案
fun areNotificationsEnabled(context: Context, channelId: String = "fcm_fallback_notification_channel"): Boolean {
// check if global notification switch is ON or OFF
if (NotificationManagerCompat.from(context).areNotificationsEnabled())
// if its ON then we need to check for individual channels in OREO
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val manager = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
val channel = manager.getNotificationChannel(channelId)
return channel?.importance != NotificationManager.IMPORTANCE_NONE
} else {
// if this less then OREO it means that notifications are enabled
true
}
// if this is less then OREO it means that notifications are disabled
return false
}
if(NotificationManagerCompat.from(context).areNotificationsEnabled())
{
//Do your Work
}
else
{
//Ask for permission
}
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Main Code Below-
//NotificationManagerCompat.from(context).areNotificationsEnabled()
if(NotificationManagerCompat.from(this).areNotificationsEnabled())
{
Toast.makeText(this, "Notification is on for this Application", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(this, "Notification is off for this Application", Toast.LENGTH_SHORT).show();
}
}
}
2023-03-18:Android 13(SDK 33 TIRAMISU)引入了一个新的运行时权限(android.permission.POST_NOTIFICATIONS),用于应用发布通知(在 Android 13 之前默认允许)。
如果您应用的目标SDK低于33并且运行在Android 13设备上,用户第一次打开您的应用系统会自动请求此权限,然后由用户决定您的应用是否允许发布通知。
如果您的应用程序针对 SDK 33 和正在运行的 Android 13 设备,则默认情况下不允许 发布通知,直到您明确请求并且用户允许为止。
注意,用户可能允许你的应用发布通知,但同时禁用了特定的通知渠道,因此仅测试是否授予权限是不够的,还需要测试通知渠道是否启用。
下面是一个示例辅助函数(在 Kotlin 中),用于检查是否允许通知:
fun isPermissionGranted(context: Context, permission: String): Boolean =
ActivityCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED
fun isNotificationAllowed(context: Context, channelId: String? = null): Boolean {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
if (!isPermissionGranted(Manifest.permission.POST_NOTIFICATIONS)) return false
}
if (!NotificationManagerCompat.from(context).areNotificationsEnabled()) return false
if (channelId == null) return true
runCatching {
val mgr = context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
val channel = mgr.getNotificationChannel(channelId)
return channel.importance != NotificationManager.IMPORTANCE_NONE
}
return false
}
试试这个:
if (Settings.Secure.getString(getActivity().getContentResolver(), "enabled_notification_listeners").contains(getActivity().getPackageName())) {
// Notification access service already enabled
Toast.makeText(getActivity(),"notification enabled",Toast.LENGTH_LONG).show();
} else {
Intent intent = new Intent();
intent.setClassName("com.android.settings", "com.android.settings.Settings$AppNotificationSettingsActivity");
intent.putExtra("app_package", getPackageName());
intent.putExtra("app_uid", getApplicationInfo().uid);
startActivity(intent);
}