Android :: Emulate Back Button In Multi-view TabActivity

Jun 5, 2010

I have a TabActivity with several tabs. Each tab corresponds to a specific view, and those views may further switch to other views. For example, one of my tabs displays RSS feed list, after user clicks one of the RSS feed, it will switch to a view displaying a list of articles, and after user clicks one of the titles, a full article view will be displayed.I'm going to add support for "back" button in my application. For instance, in a full article view, after user presses the "back" button, it should switch back to the article list view. And if user presses it the "back" button again, my application should switch back to the feed list view.My idea is to maintain a Stack<View> during navigation, and every time user presses the "back" button, the program will pop a View out of the stack, and set it as the current view. But I would like to know how to set current view in TabHost.

Android :: Emulate back button in multi-view TabActivity


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Android : User Action Emulate Hardware 'Back' Button?

Sep 6, 2010

I looked around and although there are many related questions I didn't see one that answers my exact question:

I would like to create an app that runs in the background that provides the exact same functionality as the hard coded 'Back' button in all cases.

The reason? I (for example) have a Droid X, and it is BIG. it makes it extremely hard to use one-handed and having a swipe gesture function as a back button (like in Palm Pre for example) would greatly increase the ease of use.

as far as I'm concerned the app could just be one simple class that contains:
1) a listener for the 'back' swipe
2) a call to the physical hard button itself

Is this possible? are there built in APIs for the hard coded buttons that would allow me to call them without actually pressing them?

Again - I'm not interested in overriding the button, I'm interested in making a software call to it - or failing that, in emulating it's behavior in any and all states and other apps!

Please forgive the naivete of this post. I am a very novice programmer and really I just want to know whether this is possible before I start to devote myself to trying to build it.

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Android : Back Button - Go Main Page From View

Dec 11, 2009

Am creating a small application In View Page am doing update and delete operation from database am displaying data s in the top (ex 10 records) and bottom i have 2 buttons Edit and delete if user clicks Edit button it redirects to Edit page In Edit page i am displaying content for editing also i have 2 buttons update and cancel if user click update again am redirecting(using start activity) to view page It is not displaying new records. i went back to main page and then i clicked view page now it is updated How to solve this ??? Another problem is At the same if user clicks back button it is going all page which i went (through redirected page)

For example First i clicked view page from main page in view page am doing edit and delete operation after completing this it goes to view page Here i am clicking back button it is going previous page that is edit or delete page which i have performed last I need to go main page from view (after performing edit or delete op) How to do this ?

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Android :: One View Displays Multiple Canvas - Back Button Doesn't Work

Apr 7, 2010

I have a views on the main class and many other class with an onDraw() method to draw a canvas.

Java:

CODE:.....................

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Android :: SetClick Listener On Button In Tabactivity?

Aug 15, 2009

I have created a tab activity and render a button widget over it using setcontentview I wanted to setClickListener for that button . i m able to setLongClickListener , let me know how can I implement View.setClickListener on tabActivity so that I m able to set setClickListener on button widget inside tab activity.

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Android :: TabActivity Crash When Create Tabbed View In Widget Configure Activity

Dec 4, 2009

I'm trying to create a tabbed view in my widget configure activity. I'm using a tab activity as my activity type and I have the following code..................

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Android :: Multi Column Custom List View / With Editable Edit Text At End Of List View

Nov 3, 2010

I am on Android 2.1 and I have one multi column Custom listview Using BaseAdapter with an editable edittext at the end of the listview. If the data in the listview do not contain the data of user choice then user should be able to enter data. If the data is already there in the list user will be able to select the data using custom selector. If a selection is made in the list view and user wanted to enter data in the text field at the bottom after selection then the marker in the list view should be unselected. I tried to use onclick() method on edit text using click listener. First time when it is clicked, edit text is getting focus and onclick() method is not fired. And when it is clicked second time, onclick() method is fired and notifyDataSetChanged() method is called. I tried to call the notifyDataSetChanged() method from the Focus Listener, list view selection is gone in my first attempt and edit text is not receiving any data input from the keyboard (frozen).

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Motorola Droid X : Back Button Functionality - Cannot Simply Go Back One Menu Using The Back Key

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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Android :: All Applications View - Multi Page

Nov 13, 2010

Does anyone know of a way to get your 'All Apps' screen to be a fixed multi page view rather than a scrolling list. When it's a scrolling list, it's hard to find what you are looking for quickly, as you first have to work out where you are on the list, then scroll to the required area of the list and find the app (which is always on a different place on the screen as the list moves (ie sometimes it could be at the top, sometimes at the bottom, somtimes in the middle).

On a fixed multi page view, you only need to work out which page you're on, then the app you are looking for will be in a fixed place on it's page (i.e. always top right spot on page 2). I appreciate that this is not a huge time-saving issue, but it would be helpful for me, and sometimes those few extra seconds why trying to find the 'messaging' app can be a pain in the neck. I downloaded some nice wall papers so at the moment am trying out having very clean homescreens, hence using the 'all apps' a lot more.

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Android :: Multi Column List View

Oct 6, 2010

I am trying to get a multiple column list view. The hello in the picture is the second column i m trying to achieve.

Here is the link to picture. http://www.flickr.com/photos/34403563@N02/5057967965/

Here is my xml code, if someone can help me with xml properties for label 3 it would be quite helpful.

code:.................

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Android :: Multi Resolution Image Button Selectors Broken?

Jan 6, 2010

Works like a champ. I'm now trying to make my app work on small screen devices, so I created a res/drawable-ldpi directory, and populated it with the two pngs plus the corresponding selector file.Isn't this the right way to specify ldpi specific button images? If default device xmls and pngs go in drawable, then ldpi xmls and pngs go in drawable-ldpi, right? Could these errors be the result of an inappropriate <supports-screens> element in my manifest file? Neither the api-demos in the samples (for any SDK version), or the newer samples including multires, have any multi res image button examples. In fact, I couldn't find any example where there was an xml file in a res/drawable-.

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Android :: How To Control Activity Flow - Back Button Versus Home Button

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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Android :: WebView.clearHistory() - Don't Want Back Button To Allow User To Go Back Further Than Current Session

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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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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Android :: Customize Filter With Multi Auto Complete Text View

Apr 11, 2009

Currently I'm using the default filter but I would like to be able to make it so I can ignore some letters at the beginning of the strings in the adapter. I've had a look at the public methods available on Multi Auto Complete Text View but can't find anything on how to pass my own filter to it. Any idea how to do this?

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Android :: Inflater Brings Back Child Of View Instead Of View Itself?

Sep 30, 2009

something weird is happening when i inflate a particular view and i wonder whether i'm running into some kind of namespace collision inside the resource/class space.i have a few custom views in my app and generally i park them in discrete XML files. the views are declared.

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Android :: Ok Button On AlertDialog Should Work As Back Button

Jun 16, 2009

In My code I am displaying a AlertDialog based on some condition.

CODE:.......................

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Motorola Droid X : Back Button - Swipe Left To Right On Maybe The Top Bar It Goes Back

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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Motorola Droid X :: How To Switch Back To Standard Multi Touch Input?

Aug 17, 2010

I switched to Swype but I don't like it just yet. How can I switch it back to the standard multi touch input?

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HTC Incredible :: Swiping Down Notification Bar / Back It Up - Hit Back Button?

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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General :: Have To Click Back Button 2x In Browser To Go Back?

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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Android :: How To Get Multi Line Text On Button In Android?

Apr 9, 2010

I'm looking for a simple way in Android to add a text to a button that is displayed in 2 (or more) lines. E.g. A bold and big heading in the first line and a small description in the second line. Is it possible or have I use a TextView or something similar?

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Android :: Get Example Code For Multi View Programming In Android?

Jun 20, 2009

Please some one can help me, where i can get example code for multi view programming in android.

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Android :: Android - Override Back Button To Act Like Home Button

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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Android :: Changing Back Button Press To Home Button Press

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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Motorola Droid 2 :: Droid 2 Swype / Push Voice - To - Text Button / Multi Touch Keyboard ?

Aug 16, 2010

So I have the Droid X but I noticed that the Droid 2 now has a themed version of Swype to fit in with the rest of the UI. I like it a lot.
My question is this. When you push the voice-to-text button does it pop up a window like earlier versions of Swype or does it do the really fast and slick thing that the multi touch keyboard does (just replace the keyboard with the audio waveform thing).

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Android :: Using Back Button

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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Android :: Is There A View For A Button Bar?

Jan 1, 2010

I am looking for a view or some sort of information regarding the bottom bar in default applications of Android such as Email, or Unlock pattern as shown in the picture below. I have not been able find anything about this on Androids site nor from Google searches. Image: http://img11.imageshack.us/i/viewdn.jpg/

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Android :: Back Vs Home Button

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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Android :: Control Back Button

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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