I have a Android app that shows a dialog when a value is '1' and shows the dialog repeatedly till the value is set to '0'. A Runnable
calls a Handler
which starts the dialog, and the Runnable
loops with a delay.
Problem is that when I go to another activity with the same function and go back, the dialog is already open. This causes my app to crash. I already try to use removeMessage and removeCallback but still have the problem.
Handler
Handler myHandler = new Handler()
{
@Override
public void handleMessage(Message msg)
{
/* Dialog */
final AlertDialog.Builder AlertAlarm_Build;
LayoutInflater inflater = (LayoutInflater) Settings_Activity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
AlertAlarm_Build = new AlertDialog.Builder(Settings_Activity.this);
final View Disengaged_View;
Disengaged_View = inflater.inflate(R.layout.disengage_dialog,null);
final AlertDialog PasswordDialog = AlertAlarm_Build.create();
PasswordDialog.show();
final String[] given_password = new String[1];
final boolean[] Password_Pass = {false};
//respose
final RequestQueue requestHander;
requestHander = (RequestQueue) Volley.newRequestQueue(getApplicationContext());
...//Ask for password
//New
PasswordDialog.setOnDismissListener(new DialogInterface.OnDismissListener()
{
@Override
public void onDismiss(DialogInterface dialogInterface)
{
recreate();
}
});
}
};
Runnable
//Runnable
final Runnable aMyRunnable = new Runnable()
{
@Override
public void run()
{
RequestQueue requestRun;
requestRun = (RequestQueue) Volley.newRequestQueue(getApplicationContext());
if(New_engaged[0].equals("1") && New_alarm[0].equals("1"))
{
set_engaged[0] = "1";
myHandler.sendEmptyMessage(0);
}
else
{
requestRun.add(JOR_SystemCheck);
myHandler.postDelayed(this,5000);
}
}
};
onStop
protected void onStop() {
super.onStop();
myHandler.removeCallbacksAndMessages(aMyRunnable);
myHandler.removeMessages(0);
}
Error
/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.djwiz.eclipse5, PID: 17705
android.view.WindowManager$BadTokenException: Unable to add window -- token android.os.BinderProxy@f8866f3 is not valid; is your activity running?
at android.view.ViewRootImpl.setView(ViewRootImpl.java:765)
at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:356)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:92)
at android.app.Dialog.show(Dialog.java:330)
at com.example.djwiz.eclipse5.Settings_Activity$1.handleMessage(Settings_Activity.java:68)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Based on the documentation for removeCallbacksAndMessages
Remove any pending posts of callbacks and sent messages whose obj is token. If token is null, all callbacks and messages will be removed
Your code won't match any token:
myHandler.removeCallbacksAndMessages(aMyRunnable);
So the solution would be to use:
myHandler.removeCallbacksAndMessages(null);