All geek questions in one place

Closing the Android dialog box

I am creating a custom dialog to form a screen with a simple look (which can become more complicated when I get it working). I have an xml layout that loads some text and an icon from R. However, when showDialog (int) is called, I find the power close.

I followed the instructions according to the dev manual: http://developer.android.com/intl/de/guide/topics/ui/dialogs.html

as follows:

@Override protected Dialog onCreateDialog(int id) { Dialog dialog; switch(id) { case DIAG_ABOUT: dialog = new Dialog(getApplicationContext()); dialog.setContentView(R.layout.aboutdialog); dialog.setTitle(R.string.about_title); dialog.setOwnerActivity(this); break; default: dialog = null; } return dialog; }

DIAG_ABOUT is defined as private static final int DIAG_ABOUT = 0;

The log cat shows the following trace:

 03-04 11:37:08.760: ERROR/AndroidRuntime(726): Uncaught handler: thread main exiting due to uncaught exception 03-04 11:37:08.780: ERROR/AndroidRuntime(726): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.view.ViewRoot.setView(ViewRoot.java:429) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:178) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.app.Dialog.show(Dialog.java:231) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.app.Activity.showDialog(Activity.java:2407) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at uk.me.cpearson.runningLate.Home.onOptionsItemSelected(Home.java:143) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.app.Activity.onMenuItemSelected(Activity.java:2085) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:820) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:139) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:813) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:519) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.view.View.onTouchEvent(View.java:3828) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.widget.TextView.onTouchEvent(TextView.java:6291) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.view.View.dispatchTouchEvent(View.java:3368) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:863) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:863) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1691) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.view.ViewRoot.handleMessage(ViewRoot.java:1525) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.os.Handler.dispatchMessage(Handler.java:99) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.os.Looper.loop(Looper.java:123) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at android.app.ActivityThread.main(ActivityThread.java:3948) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at java.lang.reflect.Method.invokeNative(Native Method) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at java.lang.reflect.Method.invoke(Method.java:521) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) 03-04 11:37:08.780: ERROR/AndroidRuntime(726): at dalvik.system.NativeStart.main(Native Method)

Can someone please indicate where I made a mistake, I am using SDK 1.5

+4
source share
1 answer

You need to use Activty as Context for Dialog , not Application .

Android is looking for a view to display the dialog box, and Application is not one, but your Activity . Application is an object that binds your application and has a Context , because it knows what language you use, etc., but it uses actions to display things to the user.

Replace:

 dialog = new Dialog(getApplicationContext());

from:

 dialog = new Dialog(this);
+10
source

Source: https://habr.com/ru/post/1303110/

More articles:


All Articles