In my app I want to make a change that at any point of time i.e at any activity I press Home button it shows a dialog box asking for "You want to logout?" .
I have read that overriding of Home button is not possible.
Is that true?
Any ideas?
hi you can't handle Home button in android as per to my knowledge. but yes you can do like this follow this Catch keypress with android
There is no direct way to do the same. like you can not get the KeyDown event for the HOME key. but we can get the HOME key captured and stay in the same screen by following code
#Override
public void onAttachedToWindow() {
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
super.onAttachedToWindow();
}
You can override the "back" button but you cannot override the Home button. It is the user's "ctrl+alt+del" for android!
Related
I want to block home button,back button and minimize button in navigation bar. Is it possible to block this button in android version 4.4.2?
Normally you're not supposed to block the usage of the Home button. Users should always be able to exit your app through the use of the home button. There is no api to disable this button.
1) If it is really necessary to block this button, you can make a custom OS with that functionality. There are most likely better solutions though.
2) You could register your app as a launcher app. This way you will know when the user presses the Home button and can act accordingly.
You can override the functionality of the back button.
Override onBackPressed in your activity.
I don't know what you mean with the "minimize button".
#Override
public void onBackPressed()
{
super.onBackPressed();
}
in this code remove super.onBackPressed(); line.
To remove back button.
I want to disable back button from closing the app.
How can i disable back button?
You can override the onBackPressed() method and determine what happens in that method. Like this:
#Override
public void onBackPressed() {
// do nothing because you don't want them to leave when it's pressed
}
Just add that method to your activity class and you're good to go.
However, this is bad app design. What you would most likely want to do is make a dialog pop up that asks them if they are sure they want to leave. You would add the dialog code inside that method so that when the back button is pressed, the dialog pops up.
Generally, that's not a good idea. Users hate to feel "trapped" in your app.
Many users are able to start apps "on top of" other apps. When they hit "back" they may expect your app to stop, and the app they were in previously to appear. This is different from "home" where they expect all apps to go to the background.
Users familiar and comfortable with this functionality will not like it if you change "back" - although you may give them options like "press back again to exit" as some apps do. It depends on your particular situation.
So if you are in need of it, here is a good reference:
Android - How To Override the "Back" button so it doesn't Finish() my Activity?
I want to show alert when user presses home button on device(do you want to exit the app ?)
How to do it ?
You can't handle Home button click, because of Android policy (Home button click event handling android). Of course, you can use onPause()/onStop() method of your current Activity, but your application will be moved to background too quick and user will not see your dialog, I think.
Also, note that Home not closes the app - just moves to background. User usually close app by pressing Back on main activity, try to handle it:
#Override
public void onBackPressed() {
// your dialog here
}
Is is not possible for Android apps to override the functionality of the home button. The best you can do is show the dialog when the user presses back in your topmost Activity.
You can find more information at the following SO answers:
https://stackoverflow.com/a/7240268/3214339
Android Overriding home key
Write the show alert dialog code in onPause() it will work perfectly.
i`m writing game for android using libgdx.
And have problem that game controls are near android buttons HOME and BACK.
There is easy way to handle BACK button, but i havent found something for HOME button. All i want - when user accidentally presses HOME button - to handle it and popup dialog if user want to leave game but not to minimize it at once.
You can't handle Home button (nor Lock Screen).
Reference: How to catch Home/Lock Screen button
For anyone who might stumble on this, a plausible solution would be to implement the onPause method in your android launcher
#Override
protected void onPause(){
//do whatever you need to on pause
super.onPause();
}
How can I start a progress dialog when the default Home Key button of Android is pressed? If it's possible, then how?
I've tried using the onKeyDown method, but it doesn't work.
Not really, no. You cant override the home button as you would the back or search.Take a look at this discussion:
Overriding the Home button - how do I get rid of the choice?
Duplicates this: Android - capture/suppress Home and EndCall buttons events?
The short answer: you can not handle Home button, but you can write a replacement Home Screen application.
Because the 'Home' button is such an essential feature to android (It provides the user with a quick one-touch button to get back to their home screen) that they made it so we can't run custom code to modify what it does. We do however, somewhat have control over what happens when the user presses the menu, back, or search buttons.
It's always best to conform to Android's UI design guidelines, this article on application design is a great read on how exactly we should go about things.
The prevailing wisdom says it cannot be done.
Checkout this conversation:
Home key press Event Listener
Maybe the below code would work the way you want it to. But I don't think you can trap the Home key absolutely.
Override below method in your activity.
#Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
}
Then after you can listen home key in your activity.
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(keyCode == KeyEvent.KEYCODE_HOME)
{}
});
Hope this may helpful to you.