Call method when home button pressed

Question

I have this method in one of my Android Activities    Override public boolean onKeyDown int keyCode  KeyEvent event        if keyCode    KeyEvent KEYCODE BACK                Log d  Test    Back button pressed               else if keyCode    KeyEvent KEYCODE HOME                Log d  Test    Home button pressed               return super onKeyDown keyCode  event       But  even though the KEYCODE HOME is valid  the log method never fires  This works for the back button though  Does anyone know why this is and how to get this to work

User · Answer

The HOME button cannot be intercepted by applications. This is a by-design behavior in Android. The reason is to prevent malicious apps from gaining control over your phone (If the user cannot press back or home, he might never be able to exit the app). The Home button is considered the user's "safe zone" and will always launch the user's configured home app.

The only exception to the above is any app configured as home replacement. Which means it has the following declared in its AndroidManifest.xml for the relevant activity:

<intent-filter>
   <action android:name="android.intent.action.MAIN" />
   <category android:name="android.intent.category.HOME" />
   <category android:name="android.intent.category.DEFAULT" />
</intent-filter>

When pressing the home button, the current home app's activity's onNewIntent will be called.

User · Answer

Using BroadcastReceiver  protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState          something        for home listen     InnerRecevier innerReceiver   new InnerRecevier        IntentFilter intentFilter   new IntentFilter Intent ACTION CLOSE SYSTEM DIALOGS       registerReceiver innerReceiver  intentFilter            for home listen class InnerRecevier extends BroadcastReceiver        final String SYSTEM DIALOG REASON KEY    reason       final String SYSTEM DIALOG REASON HOME KEY    homekey         Override     public void onReceive Context context  Intent intent            String action   intent getAction            if  Intent ACTION CLOSE SYSTEM DIALOGS equals action                 String reason   intent getStringExtra SYSTEM DIALOG REASON KEY               if  reason    null                    if  reason equals SYSTEM DIALOG REASON HOME KEY                            home is Pressed

User · Answer

use onPause   method to do what you want to do on home button

User · Answer

It took me almost a month to get through this  Just now I solved this issue  In your activity s onPause   you have to include the following if condition       if  this isFinishing               Insert your finishing code here         The function isFinishing   returns a boolean  True if your App is actually closing  False if your app is still running but for example the screen turns off   Hope it helps

User · Answer

I found that when I press the button HOME the onStop   method is called You can use the following piece of code to monitor it    Override     protected void onStop                  super onStop            Log d tag   MYonStop is called               insert here your instructions

User · Answer

The Home button is a very dangerous button to override and  because of that  Android will not let you override its behavior the same way you do the BACK button   Take a look at this discussion   You will notice that the home button seems to be implemented as a intent invocation  so you ll end up having to add an intent category to your activity   Then  any time the user hits home  your app will show up as an option   You should consider what it is you are looking to accomplish with the home button   If its not to replace the default home screen of the device  I would be wary of overloading the HOME button  but it is possible  per discussion in above thread

User · Answer

KeyEvent KEYCODE HOME can NOT be intercepted   It would be quite bad if it would be possible    Edit   I just see Nicks answer  which is perfectly complete

User · Answer

I also struggled with HOME button for awhile  I wanted to stop skip a background service  which polls location  when user clicks HOME button   here is what I implemented as  hack-like  solution      keep the state of the app on SharedPreferences using boolean value   on each activity     onResume   -  set appactive true      onPause   -  set appactive false   and the background service checks the appstate in each loop  skips the action      IF appactive false   it works well for me  at least not draining the battery anymore   hope this helps

User · Answer

I have a simple solution on handling home button press  Here is my code  it can be useful   public class LifeCycleActivity extends Activity     boolean activitySwitchFlag   false    Override public boolean onKeyDown int keyCode  KeyEvent event         if keyCode    KeyEvent KEYCODE BACK                activitySwitchFlag   true             activity switch stuff           return true            return false         Called when the activity is first created      Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout main       Override  public void onPause        super onPause        Log v  TAG    onPause         if activitySwitchFlag          Log v  TAG    activity switch        else         Log v  TAG    home button        activitySwitchFlag   false     public void gotoNext View view       activitySwitchFlag   true      startActivity new Intent LifeCycleActivity this  NextActivity class           As a summary  put a boolean in the activity  when activity switch occurs startactivity event   set the variable and in onpause event check this variable

[android] Call method when home button pressed

Examples related to android

Examples related to button

Examples related to menu

Examples related to android-sdk-1.6