I want to handle device home button click in my android application.When googled it is said that this
Link works.But I have some doubts.
Is it supported by all android versions?If not which of them are supported?
Is there any consequence exist because of using onAttachedToWindow() method?
Is there any way to handle Home button click(Except this)?
Thanks in Advance
This only works in previous version. But from os version 4.0 it is not working (although in my emulators this doesnt work after api level 11 but I am pointing ics according to many other links).
Found this on other posts.
On older Android version this is working. But Android changed this, because they say "Home Button should stay Home Button" and they don't want that anybody override the Home Button. And because of this reason your code is not working anymore.
If you want to do something when the home button is pressed, then do this in the onPause method.
yeah its work please try this code
#Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
}
And now handle the key event like this,
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(keyCode == KeyEvent.KEYCODE_HOME)
{
Log.i("Home Button","Clicked");
}
if(keyCode==KeyEvent.KEYCODE_BACK)
{
finish();
}
return false;
};
Related
I have an android application which kind of like a home screen of the build-in screen on android phone. I can list all the available applications and run them. One thing I don't know how to do is when user run an application from my apps, my application can trigger the hardware menu button to show the current application menus.
Is this possible ? If not, what about doing it if the device was rooted.
In activity use override onKeyDown like this :
#Override
public boolean onKeyDown(int keycode, KeyEvent e) {
switch(keycode) {
case KeyEvent.KEYCODE_MENU:
doSomething();
return true;
}
return super.onKeyDown(keycode, e);
}
In order to open up the menu from other application apart from the caller application, the device have to be rooted before the code to work.
I am making an app in which if power key is pressed twice,The app will perform some task.Please provide me some help.I have made it but its not working.
I am including my class files here,Please correct me if I am going into wrong direction.
Broadcaster
Listener
I don't know how to insert code here it is giving some error so I included links here.I am sorry for that.Please help me.
Android recommends avoiding double clicks and using the long-click besides the normal click.
For the long click use this :
#Override
public boolean onKeyLongPress(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_POWER) {
// Do something here...
return true;
}
return super.onKeyLongPress(keyCode, event);
}
You also need to add this to the manifest
<uses-permission android:name="android.permission.PREVENT_POWER_KEY" />
If this doesnt work properly onKeyDown
But I have never actually used this.
My personal opinion though is that you shouldn't hook the power key if you are planning to publish your app because unless it is doing something really an app shouldn't prevent the user from closing the screen
Solved the problem by receiving broadcast on ACTION_SCREEN_ON/OFF.
When the power button is pressed screen turns on/off depending on the fact whether screen is on or off at the time when pressing the power button.
I used this facility and put the logic in code such that if the user presses power button more than 5 times an sms will be sent to the trusted contacts.
I would like to disable the side volume buttons so the only way to control the volume will be from a dedicated activity inside my android app.
I managed to disable it for all my activities by adding the following code:
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
Log.d(TAG, "onKeyDown = " + keyCode);
if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
return true;
}
if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
return true;
}
return super.onKeyDown(keyCode, event);
}
But I don't know how to disable it for the activities i start from my app (for example I start the gallery app)!
I know it is possible as 'Volume Locker' app doing similar stuff.
It is not possible within public APIs to suppress the key events outside of your own Activities, if there is an app that has managed to do it what they are doing would be considered malicious by the platform designers and will get fixed at some point.
Based on the description given for that app (note: I've never used it personally)
Prevent accidental changes to your volume settings, install Volume Locker today.
This app helps prevent against accidental volume changes by confirming the change you made, by either tray notification or a pop up. If you don't approve the change, the volume will be reset within a set amount of seconds... By setting the timeout to "instant", the locked volumes will revert instantly without prompting.
I suspect what that is actually doing is listening for the volume buttons using a similar technique to the one in this answer and just reverting whatever change was made instantly(ish). That would make it seem to the user like the key press did nothing but in reality what happened is the volume changed and then quickly changed back.
i am trying to create a lock screen and for that i need to disable the home button..
i found the following code, its recommended by many and I tried it:
#Override
public void onAttachedToWindow()
{
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
super.onAttachedToWindow();
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
return false;
}
Now i know what its doing, I tried it on HTC Explorer, Sony Ericsson Experia Neo V, and Samsung Galaxy S2..
The code works in HTC and Sony but it seems to have no effect on Samsung Galaxy s2..
Please note that Samsung is rooted while others not...is rooted device the problem??
Any Suggestions pls?
I believe the problem is that the Home key really isn't meant to be disabled.
The only way to overwrite the home button in android is to act as a home replacement, so your app is opened when home is pressed. The user has to set your app as default app and when the screen is unlocked you open the default launcher.
The lockscreen in android isn't meant to be replaced.
When I test my android application on my phone, the application don't want to quit and make a bug on my phone. My little app take 70MB on my phone and still alive all the day...
How can I close it?
Do I have to put a Listner for the button "return" or there is some methods made from the SDK???
Thanks !
EDIT:
My application still runing, even if I press "HOME" ... this is not normal, is it?
Application on mobile aren't meant to quit, because it's against the UX of mobile user.
Have a look at this discussion. Android: Is quitting an application frowned upon?
you can override onKeyDown function like this
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if ((keyCode == KeyEvent.KEYCODE_BACK)) {
finish();
}
return super.onKeyDown(keyCode, event);
}