问题

我是Android的新手，正在尝试开发一个应用程序，用于读取WhatsApp通知并对其执行某些操作

我尝试了不同的方法来检查用户是否授予了"BIND_NOTIFICATION_LISTENER_SERVICE"权限，但是没有任何效果。它总是显示权限未被授予，但事实并非如此。以下是代码部分：

if (ContextCompat.checkSelfPermission(this, Manifest.permission.BIND_NOTIFICATION_LISTENER_SERVICE) == PackageManager.PERMISSION_GRANTED) {
    Log.i(TAG, "应用已获得权限！");
} else
    Log.i(TAG, "应用未获得权限 " + ContextCompat.checkSelfPermission(this, Manifest.permission.BIND_NOTIFICATION_LISTENER_SERVICE));

以下是我在应用程序中更改的设置：
startActivity(new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS"));

清单文件：

    android:label="Whatsapp Nachrichten leser"
    android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
    <intent-filter>
        <action android:name="android.service.notification.NotificationListenerService" />
    </intent-filter>
</service>```

监听服务已经完美运行。它只是显示我没有权限。
（对于我的糟糕英语表示抱歉）

<details>
<summary>英文:</summary>

I am new to Android and I am trying to develop an app, which reads Whatsapp Notifications and does something with them :)

I tried different things, to check, if user granted the permission &quot;BIND_NOTIFICATION_LISTENER_SERVICE&quot;
But nothing worked. It always said, that the permission isn&#39;t granted. But that isn&#39;t true. Here is the code:
```//Checke Permissions
        if(ContextCompat.checkSelfPermission(this, Manifest.permission.BIND_NOTIFICATION_LISTENER_SERVICE) == PackageManager.PERMISSION_GRANTED){
            Log.i(TAG, &quot;App has permission!&quot;);
        } else
            Log.i(TAG, &quot;App hasn&#39;t permission &quot; + ContextCompat.checkSelfPermission(this, Manifest.permission.BIND_NOTIFICATION_LISTENER_SERVICE));

That are the settings, which I changed in the App:
startActivity(new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS"));

Manifest:

            android:label="Whatsapp Nachrichten leser"
            android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
            <intent-filter>
                <action android:name="android.service.notification.NotificationListenerService" />
            </intent-filter>
        </service>

The Listener-Service works perfectly. It only sais, I don't have the permission.
(Sorry for my bad english)

答案1

得分: 7

这是解决方案：

private boolean isNotificationServiceEnabled(Context c){
        String pkgName = c.getPackageName();
        final String flat = Settings.Secure.getString(c.getContentResolver(),
                "enabled_notification_listeners");
        if (!TextUtils.isEmpty(flat)) {
            final String[] names = flat.split(":");
            for (int i = 0; i < names.length; i++) {
                final ComponentName cn = ComponentName.unflattenFromString(names[i]);
                if (cn != null) {
                    if (TextUtils.equals(pkgName, cn.getPackageName())) {
                        return true;
                    }
                }
            }
        }
        return false;
    }

private boolean isNotificationServiceEnabled(Context c){
        String pkgName = c.getPackageName();
        final String flat = Settings.Secure.getString(c.getContentResolver(),
                "enabled_notification_listeners");
        if (!TextUtils.isEmpty(flat)) {
            final String[] names = flat.split(":");
            for (int i = 0; i < names.length; i++) {
                final ComponentName cn = ComponentName.unflattenFromString(names[i]);
                if (cn != null) {
                    if (TextUtils.equals(pkgName, cn.getPackageName())) {
                        return true;
                    }
                }
            }
        }
        return false;
    }

答案2

得分: 3

谷歌为此提供了官方的 API：

NotificationManagerCompat.getEnabledListenerPackages(context).contains(context.packageName)

NotificationManagerCompat.getEnabledListenerPackages(context).contains(context.packageName)