jublikon jublikon - 6 months ago 21
Android Question

Bad window token, you cannot show a dialog before an Activity is created or after it's hidden

I am using an AppIntro library in my app.

It has 3 slides. I want to ask the user something when the third slide is shown. To achieve that I am using material dialogs by afollestad.

My code in the AppIntro Activity looks like that:

@Override
public void onNextPressed() {
if(this.pager.getCurrentItem() == 2) {
MaterialDialog dialog = new MaterialDialog.Builder(getApplicationContext())
.title("QR Code scannen")
.content("Möchtest du den QR Code scannen oder selbst eingeben?")
.positiveText("eingeben")
.negativeText("scannen")
.onPositive(new MaterialDialog.SingleButtonCallback() {
@Override
public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
Intent intent = new Intent(getApplicationContext(), RegistrationActivity.class);
startActivity(intent);
}
})
.onNegative(new MaterialDialog.SingleButtonCallback() {
@Override
public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
// TODO
}
})
.show();
}
}


Running the App I get the following issue when I slide to the third slide:

com.afollestad.materialdialogs.MaterialDialog$DialogException: Bad window token, you cannot show a dialog before an Activity is created or after it's hidden.
at

com.afollestad.materialdialogs.MaterialDialog.show(MaterialDialog.java:1328)
at com.afollestad.materialdialogs.MaterialDialog$Builder.show(MaterialDialog.java:1317)
at com.ads.adstimer.fragment.Registration.RegistrationActivity.onNextPressed(RegistrationActivity.java:64)
at com.github.paolorotolo.appintro.AppIntro$2.onClick(AppIntro.java:118)
at android.view.View.performClick(View.java:5204)
at android.view.View$PerformClick.run(View.java:21153)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)


I do not really understand the problem.
Because the AppIntro Activity is already loaded and I expect it to show a dialog when a specific fragment is shown.

How can I achieve to show a dialog when a specific slide is shown?

aga aga
Answer
MaterialDialog dialog = new MaterialDialog.Builder(getApplicationContext())

I suppose you need to pass the Activity instance here, not the application context.