问题
In my android app I have to popup a dialog on a button click event. But when I click on the button the app stops working. I load the pre designed layout into the dialog. I will post a code segment.
Button login = (Button) findViewById(R.id.btn_login);
login.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
final Dialog dialog = new Dialog(getApplication());
dialog.setContentView(R.layout.journey_details);
dialog.setTitle("Android Custom Dialog Box");
Button dialogButton = (Button) dialog.findViewById(R.id.btn_start_jrny);
dialogButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
});
And It shows the following error in the Log cat.
E/AndroidRuntime(1412): FATAL EXCEPTION: main
E/AndroidRuntime(1412): Process: com.xont.geotracker, PID: 1412
E/AndroidRuntime(1412): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
E/AndroidRuntime(1412): at android.view.ViewRootImpl.setView(ViewRootImpl.java:538)
E/AndroidRuntime(1412): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:259)
E/AndroidRuntime(1412): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
E/AndroidRuntime(1412): at android.app.Dialog.show(Dialog.java:286)
E/AndroidRuntime(1412): at com.xont.geotracker.Loging$1.onClick(Loging.java:61)
E/AndroidRuntime(1412): at android.view.View.performClick(View.java:4424)
E/AndroidRuntime(1412): at android.view.View$PerformClick.run(View.java:18383)
E/AndroidRuntime(1412): at android.os.Handler.handleCallback(Handler.java:733)
E/AndroidRuntime(1412): at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime(1412): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime(1412): at android.app.ActivityThread.main(ActivityThread.java:4998)
E/AndroidRuntime(1412): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(1412): at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime(1412): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
E/AndroidRuntime(1412): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
E/AndroidRuntime(1412): at dalvik.system.NativeStart.main(Native Method)
Can someone help me to figure out the error. Need help. Thank you!
回答1:
change
final Dialog dialog = new Dialog(getApplication());
to
final Dialog dialog = new Dialog(YourActivity.this);
and if you are inside Fragment, change to
final Dialog dialog = new Dialog(getActivity());
Dialog
requires a Context
reference whose window token is not null. here ApplicationContext's window token is null where as Activity
will have it's own window
来源:https://stackoverflow.com/questions/20779377/android-custom-dialog-gives-an-error