Android : Change The Behavior Of Back Button
Oct 27, 2010
I want to change the behavior of back button,
I have 3 activity, activity1, activity2, and activity3
another activity, activity4 is a login activity
start ->activity1-----click---->Activity2-----click---->activity3
CODE:......................
Now my question is that, when i click on apps, i want to start activity4. I'm not able to do this, always start of application is opening the activity2 in this case (back button).
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Nov 18, 2011
Any way that you can make the back button in the browser retain the same function that it normally would - IE taking you back to the last program you were in. I hate how it takes you back a page instead - I mean the Browser's back button is there for a reason, right?
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Mar 5, 2009
Say a user runs my app from the HOME screen. The app has 3 tabs. Say he/she selectes a different tab, so he/she is in a different screen (same task). Now - if the user presses BACK - the device returns to the HOME screen. If the user launches my app again - the default tab is shown. BUT - if the user presses HOME - the device returns to the HOME screen (same). If the user launches my app again - the OTHER tab is shown.
I understand (sort of) the logic - BACK returns to previous app, popping my app from the history stack, so when launched again - it is started from scratch. But this is confusing my customers - they say it's a bug ! They dont understand the different between two keys doing the same thing as far as they see (returning to HOME). Moreover - I see a different behavior with the built-in DIALER app - I change tabs, press HOME, launch the app again - and it starts with the default tab.
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Oct 20, 2010
I need to specify the full button images for both the up and down positions. My impression is that the most probable choice is to use an custom button based on the ImageView and specify the image for up and down positions. I am using the OnTouchEvent method to capture the ACTION_DOWN, but I'm not getting the ACTION_UP event.
Is there a better choice for creating a button that controls the full button image, catches the Down/Up and can subdivide the down time into time slices? If not, how do I catch the up event.
My application expects a screen touch on the "button" and not a keyboard action.
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Jun 18, 2010
Is there any way i can make my listactivity (rather listview) highlight the List Item when it is clicked (pressed) upon? (...and remain highlighted) The default behavior, simply highlights the item for a moment, and it gradually fades to black... Currently, the highlighting only happens when we use the DPad... It'd be ideal if atleast one list item is "highlighted" at all times. Worst case scenario, i may have to keep track of the "last clicked item" (by default the first) and change its background or something...but i was hoping there was an easier way...
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Dec 21, 2009
I have an app where pressing button on the screen launches an intent with a new screen and buttons. Everything is working very well, but I'm got one small visual problem. When I press the button on screen on my phone, the new page slides in from the right, pushing the old page off screen left. This happens very quickly, but the overall effect is a bit jarring. Is there a way to stop pages from display this way? If possible, I'd like the page to just appear over the old page, without any scrolling.
Is this possible in Android?
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Dec 24, 2009
I wrote a http proxy on Android 1.5 four months ago. It can work properly on both 1.5 and 1.6 emulator, with APN proxy setting to 127.0.0.1. However, when i port this app to 2.0.1, it's not working anymore. Did browser on emulator 2.0.1 change its behavior? It seems that the browser no longer consider APN proxy as http proxy anymore. Or it's simply a bug on emulator?
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Jul 15, 2010
This is my first android device and i'm loving it... but one thing that irks me is the use, or lack thereof, of the back button.
As I am navigating menus and options in the Settings, I cannot simply go back one menu using the back key. For example, if I go to Settings->Battery Manager->Battery Profile Options and want to go back to the Settings screen, I cannot.
Pushing the back button does nothing and I can only go back to the Settings menu by going Home, then re-entering.
Another quirk regarding the back button is when reading emails. Using a regular email account such as Hotmail, I cannot simply read an email and go back to the inbox using the button.
It makes navigating the phone very tedious.
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May 23, 2010
I have two questions:
1) Before the update, there was a sound that indicated when the call was ended. Anyway to get that back?
2) Has anyone figured out a way to change the end button behavior that was previously controlled by the Spare Parts app? I would like to end button to go home and then go to sleep but Spare Parts can't do it under the new software. Any ideas?
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May 1, 2010
Three Droids in the family, had for approx 1 month, with no real battery problems other than drain with GPS use. Battery usage extremely predictable. Until yesterday. Day before yesterday, wife's phone reported battery charge of ~30% after being on media dock charger all night. Figured it was a connection glitch of some kind. Happened again today, then while I was looking at the phone, battery went from ~20% to 100%. Now seemed more like a status reading problem. Picked up my phone from its media dock - a different one - and surprise surprise, it too was reading ~30% after being on dock charging all night.
(Yes, we have power and the docks are plugged in.) Powering down phone doesn't reset status, still reads ~30%.
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Sep 2, 2010
I have 3 activities in my app: Activity1 -> Activity2 -> Activity3. Inside Activity3, if the user presses Back, I would like to return to Activity2. In Activity3's onPause event, I added a finish() statement. That's probably not even necessary, but I wanted to make sure this Activity gets cleaned up. This works fine.
However, while in Activity3, if the user presses Home or starts a new app (through notification bar or some other means), I want both Activity3 and Activity2 to finish. If the user returns to this app, he should resume with Activity1.
I have figured out how to do one or the other, but I can't figure out how to handle both cases, if it's even possible. Can I trap the "Back" button in Activity3 and send a message back to Activity2 telling it not to finish()? It seems like the Activities follow the same lifecycle flow (Pause, Stop) regardless of what you do to send them to the background. Just to answer the question of why I want this behavior, imagine that Activity1 is a login screen, Activity2 is a selection screen, and Activity3 is a content screen. If I press Back from the content page, I want to be able to make a new selection. If I exit via any other means (Home, notification bar), I want the user to be "logged out".
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Mar 31, 2009
I call WebView.clearHistory(), but I am still able to go back after doing so. I want to reuse a WebView, but I don't want the back button to allow the user to go back further than the current "session" of using the WebView. Anybody know what is the best way to handle this? I thought for sure that clearHistory() would do it.
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Oct 11, 2010
In my android application i have a video list screen,a buffering screen and a videoplayer screen.
As soon as the user clicks an item from videolist screen ,he is navigated to buffering screen and then to videoplayer.
In the buffering screen i am using Async task and doing the loading process in on background process.
Now my issue is like the user if has selested a video then gets navigated to buffering screen.But if the user clicks back when he is in buffering screen then initially he is getting navigated to videolist screen but immediately after that again he is navigated to videoplayer screen.
What i would like to have is either the back button should be made disable in buffering or should prevent the player tostart if back is clicked.
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Jun 16, 2009
In My code I am displaying a AlertDialog based on some condition.
CODE:.......................
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Jul 27, 2010
I have a single activity with multiple views that represent different steps in a wizard. I have gotten code working that will save and restore the wizard to the correct screen, but after a save/restore cycle I cannot seem to get setContentView to work. The code executes without throwing any exceptions but the view isn't actually updated. Why would this be happening? SOLVED I was using a handler to change screens, but on restore I wasn't using the newly constructed one, so messages were being sent to a handler that didn't have control of the screen.
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Jul 19, 2010
I'm finding that I'm using the back button A LOT whether browsing the web or just navigating the OS. It kind of sucks because the buttons on the droid x are well, really small, and sometimes hard to press because they are so narrow and flimsy feeling. And depending on how you are holding the phone, it could be a good bit of distance for your thumb to travel or I'm finding myself having to reposition the phone in my hands just to reach the back button, which you seem to need very frequently.
Anyone know of any kind of back 'swipe' implementation ? Like some software you can install that makes it if you swipe left to right on maybe the top bar it goes back?
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May 5, 2010
Instead of trying to grab the notification bar and swiping it down, simply start ABOVE the screen and swipe down. Fast or slow makes no difference.
You can swipe it back up, or simply hit the back button.
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Sep 8, 2013
In the last few days I am having to press the back button twice when using both the stock android browser and the latest version of chrome on my rooted S3.
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Nov 7, 2012
i update ics in spice mi355 bt in my phone status in about phn only 2.3.6 only show it bt looks are change.and menu button change to option button clockwise.hw do i knw whther ics change in phn or nt?bt file is download in our forum 1ly size is 90 mb.
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Jan 4, 2010
On pressing the back button, I'd like my application to go into the stopped state, rather than the destroyed state. In the Android docs it states: not all activities have the behavior that they are destroyed when BACK is pressed. When the user starts playing music in the Music application and then presses BACK, the application overrides the normal back behavior, preventing the player activity from being destroyed, and continues playing music, even though its activity is no longer visible
How do I replicate this functionality in my own application? I think there must be three possibilities.
1) Capture the back button press (as below) and then call whatever method(s) the home button calls...........
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Sep 1, 2009
Trying to the do as the title describes with the following code, but it doesn't seem to work. It just does nothing once i have altered the keyCode. Do i have to do something to the event?
..............
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Oct 7, 2010
The above is the code I have written for filling borders of Button with black color.The same code I was using for 3 buttons by setting as background.Now, when I click button1, red color appears and goes when I releases. But I want Red color to be visible, until I press next button.Though I release Button1 after press, Red color should be visible. But Red color should only disappear when I press any other button.
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Jul 15, 2010
I am a new to android development I want to override the default back button operation in android,please let me know how i can do this in code.
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Jul 4, 2010
This has been brought up before, but I was unable to find a satisfying answer. And I know it's a newbish question.
What is the difference between exiting an app with the back button compared to the home button? I am not talking about switching to the home screen, I am talking about a scenario when you want to exit an app. For example, you play a game, you're done - do you press home or back? Or, you're in the Facebook app and you want to exit to the homescreen - what do you press - back or home? At first, I thought both buttons do the same with the difference that home brings you to the homescreen instantly while back goes through your previous steps/pages/screens in the current app and then returns you the homescreen.
But later I noticed that 'reactivating' some apps that were exited via the back button cause them to 'reload' (the loading screen shows up - with certain games, grooveshark's loading screen, etc.) while they switch back instantly when "exited" with the home button.
I gather the way to 'leave' an app you don't plan on using for at least a short while (I am not talking about closing the app, I know it's up to Android, or some task-killer) is the back button, while home is more for task switching/starting new apps while old ones are running.
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Aug 12, 2009
I want to get the Text data value from Sub-Activity back. And everything is ok. But when the Sub-activity was opened, then I just click back "button" on the phone, it throw an exception error. I found on the android NotePad life-cycle control toturial but It's hard to understand. Can someone help me? This is my code:
public class SBooks extends ListActivity {
private String title_raw;
private SBooksDbAdapter mDbHelper;private static final int ACTIVITY_SEARCH = 0;private static final int SEARCH_ID = Menu.FIRST; @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.sbooks_list);
mDbHelper = new SBooksDbAdapter(this);
mDbHelper.open();
Create Menu Option
@Override public boolean onCreateOptionsMenu(Menu menu) {
boolean result = super.onCreateOptionsMenu(menu);
menu.add(0, SEARCH_ID, 0, R.string.menu_search);
return result;
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch(item.getItemId()){
case SEARCH_ID:
Intent intent = new Intent(this, SBooksSearch.class);
startActivityForResult(intent, ACTIVITY_SEARCH);
return super.onOptionsItemSelected(item);
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent){
super.onActivityResult(requestCode, resultCode, intent);
switch(requestCode){
case ACTIVITY_SEARCH:
Bundle bundle = intent.getExtras();
title_raw = bundle.getString(SBooksDbAdapter.KEY_TITLE_RAW);
if(title_raw!=null){
Cursor cursor = mDbHelper.searchData(title_raw);
String[] from = new String[]{ SBooksDbAdapter.KEY_ROWID,
SBooksDbAdapter.KEY_TITLE, SBooksDbAdapter.KEY_LYRICS };
int[] to = new int[]{ R.id.id, R.id.title, R.id.lyrics };
SimpleCursorAdapter adapter =
new SimpleCursorAdapter(this, R.layout.sbooks_row, cursor, from, to );
setListAdapter(adapter);This is my Sub-Activity:
public class SBooksSearch extends Activity {
private EditText mTextSearch;
private Button searchButton;
private SBooksDbAdapter mDbHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.sbooks_search);
mTextSearch = (EditText)findViewById(R.id.text_search);
searchButton = (Button)findViewById(R.id.btn_search);
searchButton.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
Intent intent = new Intent();
intent.putExtra(SBooksDbAdapter.KEY_TITLE_RAW, mTextSearch.getText().toString());
setResult(RESULT_OK, intent);
finish();
@Override
protected void onSaveInstanceState(Bundle outState){
super.onSaveInstanceState(outState);
@Override
protected void onPause(){
super.onPause();
checkState();
@Override
protected void onResume(){
super.onResume();
}private void checkState() {
This is Logcat:
08-12 18:44:39.211: WARN/InputManagerService(581): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@43719140 (uid=10004 pid=623)
08-12 18:44:39.510: INFO/ActivityManager(581): Displayed activity com.original.sbooks/.SBooks: 4934 ms
08-12 18:44:40.821: WARN/KeyCharacterMap(730): No keyboard for id 0
08-12 18:44:40.821: WARN/KeyCharacterMap(730): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
08-12 18:44:41.412: INFO/ARMAssembler(581): generated scanline__00000177:03515104_00001A01_00000000 [ 64 ipp] (89 ins) at [0x297608:0x29776c] in 952924 ns
08-12 18:44:41.520: INFO/ARMAssembler(581): generated scanline__00000177:03515104_00000A01_00000000 [ 46 ipp] (70 ins) at [0x297798:0x2978b0] in 517061 ns
08-12 18:44:42.171: INFO/ActivityManager(581): Starting activity: Intent { comp={com.original.sbooks/com.original.sbooks.SBooksSearch} }
08-12 18:44:52.196: WARN/ActivityManager(581): Launch timeout has expired, giving up wake lock!
08-12 18:44:52.279: WARN/ActivityManager(581): Activity idle timeout for HistoryRecord{436bfc80 {com.original.sbooks/com.original.sbooks.SBooksSearch}}
08-12 18:44:57.350: DEBUG/dalvikvm(620): GC freed 4103 objects / 231808 bytes in 75ms
08-12 18:45:05.130: DEBUG/dalvikvm(649): GC freed 2604 objects / 150112 bytes in 88ms
08-12 18:45:10.120: DEBUG/dalvikvm(623): GC freed 2750 objects / 149592 bytes in 71ms
08-12 18:45:11.920: INFO/ActivityManager(581): Displayed activity com.original.sbooks/.SBooksSearch: 29748 ms
08-12 18:45:17.263: WARN/ActivityManager(581): Activity pause timeout for HistoryRecord{436bfc80 {com.original.sbooks/com.original.sbooks.SBooksSearch}}
08-12 18:45:26.762: WARN/ActivityManager(581): Launch timeout has expired, giving up wake lock!
08-12 18:45:27.272: WARN/ActivityManager(581): Activity idle timeout for HistoryRecord{435a7760 {com.original.sbooks/com.original.sbooks.SBooks}}
08-12 18:46:04.905: DEBUG/AndroidRuntime(730): Shutting down VM
08-12 18:46:04.905: WARN/dalvikvm(730): threadid=3: thread exiting with uncaught exception (group=0x4000fe70)
08-12 18:46:04.905: ERROR/AndroidRuntime(730): Uncaught handler: thread main exiting due to uncaught exception
08-12 18:46:04.991: ERROR/AndroidRuntime(730): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=0, data=null} to activity {com.original.sbooks/com.original.sbooks.SBooks}: java.lang.NullPointerException
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at android.app.ActivityThread.deliverResults(ActivityThread.java:3005)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3047)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at android.app.ActivityThread.access$2300(ActivityThread.java:112)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1721)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at android.os.Handler.dispatchMessage(Handler.java:99)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at android.os.Looper.loop(Looper.java:123)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at android.app.ActivityThread.main(ActivityThread.java:3948)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at java.lang.reflect.Method.invokeNative(Native Method)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at java.lang.reflect.Method.invoke(Method.java:521)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at dalvik.system.NativeStart.main(Native Method)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): Caused by: java.lang.NullPointerException
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at com.original.sbooks.SBooks.onActivityResult(SBooks.java:111)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at android.app.Activity.dispatchActivityResult(Activity.java:3595)
08-12 18:46:04.991: ERROR/AndroidRuntime(730): at android.app.ActivityThread.deliverResults(ActivityThread.java:3001)
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Aug 25, 2010
I was wondering how or if it is possible to exclude activities from the back buttons history list? For example not letting the user back into the Splash Screen?
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Nov 24, 2010
I want to implement back button functionality in my Android Application similar to the back button in the Browser but without using Intents.
I m going to view a sport listview, in that i click football listview , in that i click my favorite player listview, suppose if the user press back button in football listview then i have to diaplay sport listview.
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Sep 1, 2009
I have a bunch of activities that are launching each other through intents. somehow, i got into a code state where some of the screens the back button (physical button) works, but others it does not.
I didn't do anything intentionally to disable the back button - what could be causing the back button not to work?
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Nov 2, 2010
on the ui i am having a back button displayed. there are three activities say A,B,C. Activity A is splash screen. Activity B is home screen. Activity C is edit screen. on edit screen only i am having a back button. when the user press that i open the activity B which also contains some sort of http request and response. i want that the previous activity from stack should get displayed? how can i achieve that? i am able to open previous activity on pressing the back button of device? when i press back button on device there doesnt goes any http request? i want to achieve this behaviour when i press the ui back button.
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Aug 17, 2010
My app chains some activities.
if you press the back button, you go back through old activities then you suddenly quit the application !
so I need to show a message like "do you really want to exit" if it's the last activity on stack
I know how to override the back button but i can't figure how to know how many activity are in history
CODE:..................
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