【发布时间】：2018-10-19 11:09:03
【问题描述】：
代码
public class MainService extends JobIntentService {
WindowManager wm;
LayoutInflater li;
RelativeLayout ll;
View myview;
int NOTIFICATION_ID = 1;
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
String CHANNEL_ID = "my_service";
String CHANNEL_NAME = "My Background Service";
if (Build.VERSION.SDK_INT >= 26) {
// in APIs 26+ we should show a notifications
NotificationChannel channel = new NotificationChannel(CHANNEL_ID,
CHANNEL_NAME, NotificationManager.IMPORTANCE_NONE);
((NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE)).createNotificationChannel(channel);
Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
.setCategory(Notification.CATEGORY_SERVICE).setPriority(PRIORITY_MIN).build();
startForeground(NOTIFICATION_ID, notification);
}
wm = (WindowManager) getSystemService(WINDOW_SERVICE);
li = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
ll = new RelativeLayout(this);
ll.setBackgroundColor(Color.RED);
LinearLayout.LayoutParams layoutParameteres = new LinearLayout.LayoutParams(
50, 500);
ll.setBackgroundColor(Color.argb(66,255,0,0));
ll.setLayoutParams(layoutParameteres);
canDrawOnScreen();
final WindowManager.LayoutParams parameters = new WindowManager.LayoutParams(
50, 500, WindowManager.LayoutParams.TYPE_PHONE,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.TRANSLUCENT);
parameters.gravity = Gravity.RIGHT | Gravity.CENTER;
parameters.x = 0;
parameters.y = 0;
wm.addView(ll, parameters);
WindowManager.LayoutParams updatedParameters = parameters;
ll.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainService.this,UsersService.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startService(intent);
}
});
}
@Override
public void onDestroy() {
super.onDestroy();
stopSelf();
}
@Override
protected void onHandleWork(@NonNull Intent intent) {
}
private boolean canDrawOnScreen() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
return canDrawOnScreenM();
} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
return canDrawOverlaysUsingReflection(getApplicationContext());
} else
return true;
}
@RequiresApi(api = Build.VERSION_CODES.M)
private boolean canDrawOnScreenM() {
return Settings.canDrawOverlays(getApplicationContext());
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
public static boolean canDrawOverlaysUsingReflection(Context context) {
try {
AppOpsManager manager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
Class clazz = AppOpsManager.class;
Method dispatchMethod = clazz.getMethod("checkOp", new Class[]{int.class, int.class, String.class});
//AppOpsManager.OP_SYSTEM_ALERT_WINDOW = 24
int mode = (Integer) dispatchMethod.invoke(manager, new Object[]{24, Binder.getCallingUid(), context.getApplicationContext().getPackageName()});
return AppOpsManager.MODE_ALLOWED == mode;
} catch (Exception e) {
return false;
}
}
}
错误
java.lang.RuntimeException: Unable to create service com.appmaster.akash.messageplus.Services.MainService: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@463b2ce -- permission denied for window type 2002
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3414)
at android.app.ActivityThread.-wrap4(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1683)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@463b2ce -- permission denied for window type 2002
at android.view.ViewRootImpl.setView(ViewRootImpl.java:789)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:92)
at com.appmaster.akash.messageplus.Services.MainService.onCreate(MainService.java:83)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:3404)
at android.app.ActivityThread.-wrap4(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1683)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
此特定服务在较低的 API 中运行良好，但在 26 时遇到问题...我不太确定如何为服务授予权限，但仍然尝试过...所以有人可以帮我解决错误......它只是一项基本服务......同样在较低的API中，我也不知道如何直接从应用程序授予权限，所以我去设置并手动进行，然后它就可以工作了。因此，如果有人帮助我了解所有 API，那就太好了
【问题讨论】：
标签： java android android-studio exception service