Android : Back Button - Disable In Buffering Or Should Prevent The Player Tostart If Back Is Clicked
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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Feb 5, 2009
I have an application with main view having a search button. On clicking the search button, search results are displayed in a text view. When I hit the back button at this view, instead of navigating to the previous screen, application itself gets closed. Could anybody please let me know how to go back to previous screen.
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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 2, 2010
I have an Activity with a list that is bound to a ListAdapter reading data into a ArrayList from a database. All is well when the data is first loaded. While the Activity is open and the list is being displayed it is possible and likely that the data in the database will be updated by a service but the list does not reflect the changes because the ArrayList does not know about the changes. If the Activity is no longer in the foreground as would be the case if the user goes to the home screen and then is brought back to the foreground I would like for the Activity to not display what it did prior but rather reload the data using the ListAdapter the view is bound to. I think something needs to call finish() but I am not sure what.
This is what I have in the Activity.
CODE:.......................
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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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Aug 30, 2010
I used onKeyDown function in the activity.....but when back button
button is clicked it first cancels the dialog box and goes to our
activity...I want both either both activity and dialog box closed when
clicking the back button or disable the back button when the dialog
box is shown...
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Jun 17, 2010
How to disable the back button when the alert box is on the screen I used onKeyDown function in the activity.....but when back button button is clicked it first cancels the dialog box and goes to our activity...I want both either both activity and dialog box closed when clicking the back button or disable the back button when the dialog box is shown...
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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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Sep 15, 2013
How to completely disable navbar when in full screen and use power button as "Back" and long press power means screen off. I want to save some precious screen space and avoid accidentally press navbar when playing games.
Is there a way to do it? I'm on CM10 - FXP - Ion lt28h
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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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Apr 12, 2010
I have a dialog with edittext for input. when i click yes button on dialog, it will validate the input and then close dialog. However, if the input is wrong, i want to remain in the same dialog. every time no matter what input it is, the dialog always automatically close when i click button. How can i disable this. By the way, i use PositiveButton and NegativeButton for the button on dialog
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May 7, 2010
Is there any way to determine when the user clicked the app icon to launch the app ? I mean say a user was using my app. Then he presses the home key as a result of which the app goes to the background. After sometime he clicks the app icon again. My question is do I get a call-back for this?
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Aug 1, 2012
I made mistake when clicked forget bluetooth device and now I can't get it back. It is my car handsfree and I can't rename it.
How to get back my device in bluetooth list?
Am using Ice cream sandwich.
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Sep 3, 2010
If I want to write a Screensaver or Lockscreen. Is there a way to prevent the home key from going back to the launcher?
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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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Jun 16, 2009
In My code I am displaying a AlertDialog based on some condition.
CODE:.......................
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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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Jun 2, 2010
I am using MediaPlayer to play a video in my app. The video takes a while to buffer and the videoview is blank for that time. Is there a way to start the buffering when the user is in the previous screen, so that when he comes to the video playing screen, the video is ready to play?
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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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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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Sep 1, 2010
I'm writing an application which will have two Activities, when the user presses the back button on the second activity a dialog should pop up asking the user to confirm the action. So how do I intercept this? I seriously doubt about this coz the backstack is a part of the OS itself. Has anyone found a workaround?
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Sep 27, 2010
I have an activity that calls the
CODE:.........
I would like to add a button to the notes_row.xml that displays at the bottom of the screen "on top of" the actual notes_row allowing the user to still scroll through the list but hit the button if they want. Every time I try to change the layout of notes_row, I get the button on each item in the list. I am pretty new to Android and I think I need to inflate the button somehow so that it is layered in front of the list but doesn't impede the list, how do I go about doing that?
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Sep 13, 2009
Why Update buffering is always 0% when mediaplayer play the rtsp? I try to play this both on the emulator and on the device. But eveytime it shows that the Update buffering is always 0%. Could anyone give me a reason?
At last it always shows the log
E/MediaPlayer( 1455): stop called in state 4
E/MediaPlayer( 1455): error (-38, 0)
E/PlayerDriver( 1088): Command (7) was canceled
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Feb 18, 2010
Is there any way to disable the 4 buttons at the bottom of the screen? I forget if there's a term for them but the Home, Menu, Back & Search buttons? It's almost impossible to play some games because I inevitably hit them for a split second and I lose all my progress.
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