如何以编程方式检查“enabled_notification_listeners”？

Question

我需要检查我的应用程序的服务在“通知访问”中是否已启用。

我正在使用这段代码来检查这一点。该代码在Nougat上运行良好，但在Marshmallow上崩溃。我怎样才能在棉花糖上做到这一点？

android.provider.Settings.Secure.getString(this.getContentResolver(), "enabled_notification_listeners").contains(getApplicationContext().getPackageName())

这是LogCat 中的错误：

12-06 15:28:02.905 4428-4428/com.inetsoho.app.SkyChat E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.inetsoho.app.SkyChat, PID: 4428
    java.lang.IllegalStateException: Could not execute method for android:onClick
        at android.view.View$DeclaredOnClickListener.onClick(View.java:4740)
        at android.view.View.performClick(View.java:5697)
        at android.view.View$PerformClick.run(View.java:22526)
        at android.os.Handler.handleCallback(Handler.java:739)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:158)
        at android.app.ActivityThread.main(ActivityThread.java:7224)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at android.view.View$DeclaredOnClickListener.onClick(View.java:4735)
        at android.view.View.performClick(View.java:5697) 
        at android.view.View$PerformClick.run(View.java:22526) 
        at android.os.Handler.handleCallback(Handler.java:739) 
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:158) 
        at android.app.ActivityThread.main(ActivityThread.java:7224) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
     Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.contains(java.lang.CharSequence)' on a null object reference
        at com.inetsoho.app.SkyChat.ui.activities.authorization.LandingActivity.SignUpPhoneNumberOnClickListener(LandingActivity.java:110)
        at java.lang.reflect.Method.invoke(Native Method) 
        at android.view.View$DeclaredOnClickListener.onClick(View.java:4735) 
        at android.view.View.performClick(View.java:5697) 
        at android.view.View$PerformClick.run(View.java:22526) 
        at android.os.Handler.handleCallback(Handler.java:739) 
        at android.os.Handler.dispatchMessage(Handler.java:95) 
        at android.os.Looper.loop(Looper.java:158) 
        at android.app.ActivityThread.main(ActivityThread.java:7224) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

Answer 1

使用此函数来获取我们的包是否有通知监听器。该函数将返回 True 或 false。

boolean hasNotificationAccess()
    {
        ContentResolver contentResolver = this.getContentResolver();
        String enabledNotificationListeners = Settings.Secure.getString(contentResolver, "enabled_notification_listeners");
        String packageName = this.getPackageName();

        // check to see if the enabledNotificationListeners String contains our package name
        return !(enabledNotificationListeners == null || !enabledNotificationListeners.contains(packageName));
    }