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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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.
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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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Mar 17, 2010
I have an activity that contains several user editable items (an EditText field, RatingBar, etc). I'd like to prompt the user if the back/home button is pressed and changes have been made that have not yet been saved. After reading through the android documentation, it seems like this piece of code should go in the onPause method. I've tried putting an AlertDialog in the onPause however the dialog gets shown and then immediately tears down because nothing is there to block the pause from completing.
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Nov 13, 2010
i am new to android. i am showing Intent.ACTION_DIAL when my application starts..but when i clik back button it shows a activity page and again press back button it finishes the activity.i want when application starts dialler shown and if user cliks back button it calls finish() method
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Oct 6, 2010
First of all, maybe i went about this the wrong way in the first place. Situation is, i have a listview that when an item is clicked, it creates an intent and calls startActivityForResult() to another activity, to be able to edit the entries in the row. and that other activity after editing the required values, returns back to the calling activity, when the user clicks on a save button. The activity then uses the row Id to update the item.My problem now is that, if the user presses the BACK button instead, the application crashes. i have been looking around and see solutions like using Shared Preferences or onSavedInstanceState(), but i don't know where exactly i should be putting the code?
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Sep 27, 2009
When I currently have my activity on the font of the screen, how can I make Android to 'destory' my activity when user clicks 'back' button? (i.e. onDestory of my Activity gets called)?
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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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Nov 17, 2010
If (in Android) I have an EditText box, how can I trigger an event when the user has finished entering data and hits return/Next?
I have tried using the code below but it seems to have no effect. I also get an 'The method onEditorAction(EditText, int, KeyEvent) from the type new extView.OnEditorActionListener(){} is never used locally' error.
myEditText.setOnEditorActionListener(new EditText.OnEditorActionListener() {
public boolean onEditorAction(EditText v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_NEXT)}
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Aug 7, 2010
I would like to know if it's possible to update a third party application without user action. By 3rd party, I mean an application not located on the Android Market but rather on a specific website.
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Aug 7, 2010
I would like to know if it's possible to update a third party application without user action.By 3rd party, I mean an application not located on the Android Market but rather on a specific website.
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Jan 13, 2010
I need an application for google android that record the sequence of user actions as macro and playbacks when required. I searched on google and found that this utility is available for window smart phone but could not found for android. Let me know if this is feasible and how we can do this?
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Aug 3, 2010
When on android default browser long press on the back key opens the history tab. Is there a way to open my own app instead of the history tab by similar user action?
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Apr 20, 2010
I've a form with 2 fields,
after First login, i store the Mail in SharedPreferences and i restore when user start app again,
But how to set focus on Pass Field ? it's not very nice to see that mail is fill but focus is still on mail field. code...
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May 14, 2010
i have code that runs onitemselectedlistener event of spinner.So when i am in the method :
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
//I want to do something here if its a user who changed the the selected item
}
... can i know whether item selection was changed programmatically or by a user action through UI.
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Sep 27, 2009
Can anyone give me a brief idea on developing a simple crossword puzzle game with android? I need some guideline in things like:
1. Drawing out the boxes
2. How do I draw a boxes with number label on their top right/left corner
3. How to catch a button click action whenever the user click any box on the screen, then I will pop up an input box and ask for input.
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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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Aug 27, 2010
I got one question regarding the intent action "ACTION_CALL". What is the correct way of getting back to the own application/activity after the user ends the call? The only way that came to my mind uses a PhoneStateListener in a background services that waits for the CALL_STATE_IDLE event starting up the application again. But I am not quite sure if that is the correct/intended way of using the intent.
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Sep 1, 2009
I'm trying to teach myself how to write android apps and I'm having trouble registering a button click and taking actions based on which radio button is selected at the time. This is a simple tip calculator:
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.RadioGroup;
import android.view.View;
public class TipCalc extends Activity implements RadioGroup.OnCheckedChangeListener,View.OnClickListener
{........................
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May 11, 2010
I'm starting with Scala + Android (and using the sbt android plugin). I'm trying to wire a button action to a button without the activity implementing View.OnClickListener.
The button click fails at runtime because the method cannot be found. The document I'm working through says that I need only declare a public void method taking a View on the action, and use that method name in the layout.
What have I done wrong? MainActivity.scala package net.badgerhunt.hwa
import android.app.Activity
import android.os.Bundle
import android.widget.Button
import android.view.View
import java.util.Date. Code...
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Nov 22, 2012
This is a question about the new Swype beta. Everything about the newest versions of Swype Beta are amazing. Being able to change themes, and some function changes, etc... EXCEPT for the back/delete button action. This is the only thing that sucks. Where as you used to be able to HOLD the delete button and delete whole words, you can only delete one letter at a time unless you highlight the word using the swype key which can become aggravating.
My question. How hard would it be to go in and change the action of the delete button? Would it be a simple smali edit or even a simple xml edit.
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Sep 8, 2010
implicit intent with class name as action defined in intentfilter. is not working. Only it it is defined as "android.intent.action." it is picked up ? is it so ?
I have app A with the following in manifest.xml file
CODE:.............
In app B, i tried to call the activity in A using below code.
CODE:.............
This code works. But not above line.
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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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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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Sep 1, 2010
When I press on the home button lightly a "complete action using" option comes up and tells me to choose either A.HOME or B. TwLauncher. What does this mean? And why is it showing up? I haven't noticed this until today--I now have to choose one when I press on the home button.
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Nov 17, 2013
My new LG G2. It has this shortcut if you long press volume up/down it starts quick memo/camera. But quick memo is useless for me I'd rather love to start a widget (a tasker task). I tryed several app's and xposed framework modules but I can't get a Widget working with the remapping.
How to remap the volume up hardware button to a tasker task widget?
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Jun 16, 2009
In My code I am displaying a AlertDialog based on some condition.
CODE:.......................
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Mar 15, 2010
Apparently rooting and using custom ROMs hasn't solved this issue. Before I rooted my phone I was having the issue that, despite checking the "Use by default for this action" box, my phone just plain refused to save what homescreen app to go to when I tap the "Home" button.I've tried clearing the cache. I've done factory resets and data wipes (although I did restore "all apps with data" with Titanium Backup). I've tried using the Home Switcher app. Nothing works.Right now my phone is running the current version of BB, ChevyNo1's 1.0Ghz 5 slot update.zip for OC, and am using AdamZ's Smoked glass theme. I want to use the "HelixLauncher" app as my default homescreen, but it's rather obnoxious having to constantly select it when I hit the home button (it'll save my default action for a few clicks, and then I'll have to set it again).
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Nov 3, 2010
I want to show some notification when android phone is connected to system. I implemented BroadcastReceiver for listening to event android.intent.action.ACTION_UMS_CONNECTED in my application But it is not working. Is it possible to capture this event.
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Oct 31, 2010
I thought that Action was preeminent during intent resolution and if the intent had the same action as the intent filter, it would be considered a match regardless of data, if the filter did not specify anything. So I was very surprised to find that supplying action+data where filter had only action, causes it to fail. In the code below, if you comment out line 47 so that data is *not* sent, only then it resolves correctly. To get it to work with the data (an id that is simply a String), what mime type should I specify in the intent filter?
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