Android : Click Handling From Multiple Buttons On A Screen?
Aug 8, 2010
The following code is from http://developer.android.com/guide/topics/ui/ui-events.html and shows how to handle a click on a button (called corky, I think) If I had several (say 10) buttons on a form, each launching a different subscreen, would I have to find and repeat the setOnClickListener statement for each button, then put a switch statement in the onClick subroutine, or is there a better way to do it? (I'd rather not resort to naming my buttons Button1, Button2 etc and using a loop). code...
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Oct 25, 2010
So when I am on the call screen, and want to hang up or pull the key pad to enter some numbers, sometimes it takes about 3 seconds for the screen to become responsive and those buttons to become press-able. I say 'sometimes' because many a times it just works outright and I can lower the phone from my face and tap the end call button and it works. But other times it can create situations where I want to hang up the phone immediately but cant. Does it happen with anyone else?? One reason for this could be bad proximity sensor, but if screen can light up on taking the phone away from ear, it means proximity sensor is working fine. Any solutions?
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Apr 13, 2010
I've read the Android documentation:
http://developer.android.com/guide/practices/screens_support.html
but still have some questions. I'm trying to design a music application which basically has images of the instrument (ImageButton) that play a sound when clicked. However, I'm confused about how to have the ImageButtons scale to fit all the different screen sizes and how to position them.
Which layout is best used for needing to position ImageButtons in specific locations on the screen? (i.e. cymbals on a drum set) FrameLayout, RelativeLayout? If I only really care about medium and large screens, do I need to create different resources (images) for both as well as a different XML layout to position them? I'm trying to find the simplest way to do this without having to create a separate layout XML file for positioning/size and separate image resources for each screen.
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May 11, 2010
I would like to build an application that caters for multiple accounts (eg. home, work) and account types (e.g. ISP, VoIP, Mobile). Essentially, I would like to get the user to create the accounts they want and then have all the accounts listed on the start page grouped by type.
For example:
ISP:
- Home
- Work
Mobile:
- Mum
- Dad
When you click on the account, it would take you to another screen where I do a bunch of calcs and display the results.
I currently do this via multiple apps but am looking at consolidating into the one app. I am just not sure where to start or how I go about achieving this? The way the Contacts app works is a good example of what I am wanting to do.
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Nov 9, 2010
I want to know if it is possible to support multiple profiles within Android? To explain my question better, can we have two or more applications, which uses a Data Call, operating simultaneously in Android? For e.g. is it possible to have one IM, one e-mail application and one SNS(like Facebook) operating simultaneously in Android phones? If yes, I want to know how this is being handled within the Android Stack code. Since the platform code is open source, any suitable reference to any portion of the code handling this behavior would be perfect.
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Jun 10, 2010
I have a class A which extends TabActivity and creates Activities B, C and D as tabs in its onCreate() function. Also, class A initializes another service handler class S which is responsible for establishing a connection to a service and implementing callback handlers for the service. Any of the Activities B, C and D should be able to receive events from the service and update accordingly. If I receive any event in class S from the the service then I want to call a function in Activity B which would be responsible to update the UI elements in Activity B based on the event received. You can assume that the user is in Activity B when the event arrives.
Can I call an activity function like the following in the stub handler for the callback in my class S -
CODE:................
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Apr 4, 2010
I have a problem with my application. During the execution of it, I have some buttons which execute other activities when I click on them. The way I am realising it is:
private OnClickListener scaleImage = new OnClickListener() { public void onClick(View v) { Intent intent = new Intent(); intent.setClass(main.this, Scale.class); startActivity(intent);
update(); }
};
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May 15, 2012
I want to do some browser automation from my android phone. I have tasker, but that only gives me http post and http get operations. I do not think that these functions can do that.
Basicaly, I want to open a browser, go to a website, login. I would also like to automate this from a job scheduler. I can do a schedule with tasker.
However, when I google how to programmatically click buttons and send usernames and passwords, I can't find an application that has that functionality on the android. I may need to code it. When I google 'android automation' etc... I get selenium and other utilities that are run on a pc to test android applications. I do not see anything to manipulate browsers. iMacros is not out yet for android.
I basically just want to connect to a page, pass my username and password and do a perform click.
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Jul 3, 2010
For some reason, I am having trouble click on buttons when browsing.
For example, if I type a post on the facebook mobile web site. And click "post" the buttons becomes gren like I have clicked on it but nothing happens! This is also the case with other pages with clickable buttons.
Turning the power on and off, seems to work for a bit, but then it happens again. I couldn't seem to find anyone having these issues for some reason and it's very annoying because I can't make any posts on Facebook this way.Clicking on an actual link works just fine, however.
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Jul 29, 2009
I am not able to find out the perfect layout(viewgroup) to place four buttons as shown in the attached image. Basically, i want to place four buttons near the top/left/bottom/right edge of the screen. AbsoluteLayout helped, but it is deprecated (It is also better to avoid AbsoluteLayout as it is not very flexible for orientation changes)
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Dec 19, 2009
When I DL'd the GDE app, I accidentally set my stock droid "HOME" screen as the default screen when the popup box came up asking me to choose between stock Home and GDE. Now when I click on GDE and click the home button, it switches back to the stock Home screen. How to I switch the settings now to set the GDE app as the new home screen?
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Jul 6, 2010
My project is working fine when i hold my HTC device vertical.But the moment i rotate my screen 90degrees , it throws a force close error.Starts all over again, runs fine until i again change the orientation.How do i handle it ?
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Aug 12, 2010
I have an android context menu with various selections and depending on the user selection I want to start an intent. The intent starts the same activity for all the buttons but will contain different String variables depending on the selection. I am currently using a switch, case methodology for my click listener but keep running into 'duplicate local variable' problems as I try to eliminate code repetition! If anyone could provide a-bit of pseudo-code that would be even better.
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May 3, 2010
I am using three buttons along with the list view.These three buttons are added to the layout using the TableLayout and TableRow.The first button takes more space on content, so the other two becomes smaller in size than first one. When the application runs, it doesn't even show the two other buttons.How can I make the size of three buttons equal and display all of them when application runs?Give me some example please.
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Oct 25, 2010
I have several Gmail accounts and I would like to have a desktop button for each one. Is there a way to do this? Currently there is one button for Gmail and once I open it I can select the account I want to see.
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Aug 21, 2009
I am writing a program where I need a ListView for which I am using a ListActivity. Each one of the views within the ListView has four buttons, (Off, Dim, Bright and On). Each one of these buttons is configured with it's own OnClickListener when I build the view. This part seems to work ok. However when I have say 5 Views each which has these four buttons, I can tell whether an off, dim, bright or on button was pressed but I cannot tell from which view it was pressed. So for example if my views are devices (Light, Heater and Kettle) I press an "on" button and I know an On button was pressed but how do I get it to tell me the On button for the Light was pressed?
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Sep 11, 2009
I have a layout with multiple buttons. Now I need to scroll them horizontally. Below is the part of my xml file. But I am not able to get the scroll bar and also not able to see the Buttons 4 & 5.
CODE:.................
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Oct 23, 2012
Question 1: I have 2 activities. I was wondering how to optimize it. I can either create 2 activities with multiple listeners. Or create multiple java files for each button(onclick listener)
Question 2: I have tried to create multiple listeners in one java but can only get one button to work. What is the syntax for multiple listeners in one java file? Here is my *updated code: now the issue is no matter what button is clicked on it leads to the same page.
activity1.java
PHP Code:
package install.fineline;import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
[Code]...
and activity2.java
PHP Code:
package install.fineline;
import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;
[Code]...
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Nov 10, 2009
I've a ListView where every element in the list contains a TextView and two different Buttons.I found a solution as described in my answer below. Now I can click/tap the button via the touch screen. However, I can't manually select it with the trackball. It always selects the whole list item and from there goes directly to the next list item ignoring the buttons, even though I set .setFocusable(true) and setClickable (true) for the buttons in getView().This causes that no list item is selectable at all any more. But it didn't help in making the nested buttons selectable.
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Mar 25, 2009
I am new to android and trying to create a customized list. Every item in the list has TextView and one Ratingbar. I now want add a couple of command buttons at the end of the list (like BACK, HOME, , NEXT). When I add these extra views to the layout xml file then they get added along with every item in the list. I think there should be another layout defined for the buttons to be displayed separate from the list. Anyone has an idea on how to do this?
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Mar 12, 2010
I'm trying to find a way to properly handle setting up an activity where its orientation is determined from data in the intent that launched it. This is for a game where the user can choose levels, some of which are int portrait orientation and some are landscape orientation. The problem I'm facing is that setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) doesn't take effect until the activity is fully loaded. This is a problem for me because I do some loading and image processing during startup, which I'd like to only have to do once.
Currently, if the user chose a landscape level:
the activity starts onCreate(), defaulting to portrait discovers from analysing its launching Intent that it should be in landscape orientation continues regardless all the way to onResume(), loading information and performing other setup tasks at this point setRequestedOrientation kicks in so the application runs through onPause() to onDestroy() it then again starts up from onCreate() and runs to onResume() repeating the setup from earlier
Is there a way to avoid that and have it not perform the loading twice? For example, ideally, the activity would know before even onCreate was called whether it should be landscape or portrait depending on some property of the launching intent, but unless I've missed something that isn't possible. I've managed to hack together a way to avoid repeating the loading by checking a boolean before the time-consuming loading steps, but that doesn't seem like the right way of doing it. I imagine I could override onSaveInstanceState, but that would require a lot of additional coding. Is there a simple way to do this?
Solution:
As per Daniel's answer, this was actually quite easy to fix. I just needed to make a few small changes. In my 'menu' Activity, where the player would choose which level to play, I just had to add an if/else check to choose which class would be started by my Intent. This was done with a simple int representing portrait or landscape, determined when the player selected a level. I then created a second class extending my 'GameLogic' class; this is the class which contained most of the code for the game itself, rather than the menus, instructions, etc.
public class GameLandscape extends GameLogic{}
Literally that simple and completely empty. That way it inherited all the code from my previous activity where I had already coded it to handle things differently depending on the orientation. Lastly I just had to add a line to the manifest stating that GameLandscape would always run in landscape, and GameLogic would always run in portrait.
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Oct 30, 2010
I've been a couple of days trying to solve this thing but I can'f figure it out.The problem is, simple activity, with simple layout, ScrollView -> LinearLayout -> and a lot of buttons inside the layout (within the scroll content). Everything works just fine but one tricky thing. When I click a button let's say at the top of the scroll content and inmediatelly I scroll down to the bottom of the content and I click other button there, nothing happens until I click a second time and all come to normal again.This can be reproduced anytime and it's code independent (i've tried more than 20 scenarios). I've not much experience in android yet but looks like the scroll listener stops the onclick listener or something like that.
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Oct 12, 2010
I am trying to follow a tutorial to learn how to get to a new screen on a button click. The issue I feel I am facing is that in this tutorial they have a file named main.java, firstly I don't have such a file. I think I named the file as name1.java and on this screen i have everything going on including this button I am trying to make. So I m really confused as in this article below they have the main.java file and from that file they are moving to screen 1 and screen 2. Is it so important to have a main.java from where we branch the two activities?
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Feb 23, 2010
So through a weird assortment of events i managed to crack the screen on my Eris. But this is the trippy part, I didnt break the glass but the touch sensors underneath. So now i am unable to use the menu or home buttons and the entire left part of my screen and more. I am unable to unlock my device in anyway that i know(menu button, the slider). Is there any other way to unlock it? I now have 11 unread texts and 4 voicemails that I desperately want to view. Oh and I know some of you won't be happy about what I'm about to say but.... I took the leap to the moto droid. I had the chance to get it on a 1 year because I didnt get insurance and I went for it. I will really miss my Eris but the keyboard lag was just killing me.
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Jul 8, 2010
when i click on talk icon it goes to a black screen as if it was gonna launch google talk but then goes right back to main menu screen.
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May 27, 2010
I am a beginner in Android programming. I want to build a simple application with a main list view in the screen and two buttons at the bottom of the screen.When more items are added to the list view, the list view should scroll without increasing the overall length of the list view.
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Nov 22, 2010
I have a very simple widget application which consists of a linear layout with a background and an image button. In the AppWidgetProvider on Update method, I register the click of the button to broadcast an intent. When the widget first loads, everything runs fine and the click is captured. The problem occurs when the screen is rotated, and the click is never captured again even if the screen is rotated back. What do I have to do to re-register the click when the screen rotates? below is some segments of code I am using.
AppWidgetProvider
@Override
public void on Receive(Context context, Intent intent)
{super.on Receive(context, intent);
if(intent.getAction().equals("test.CLICK"))
{Closemouthed(context);}}
@Override
public void on Update(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds)final int N = appWidgetIds.length;
// Perform this loop procedure for each App Widget that belongs to this provider for (int i=0; i<N; i++) {
int appWidgetId = appWidgetIds[i]; RemoteViews views=new RemoteViews(context.getPackageName(), R.layout.widget);
Intent click intent=new Intent("test.CLICK");
Pending Intent pendingIntentClick=Pending Intent.getBroadcast(context, 0, click intent, Pending Intent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.change_mode, pendingIntentClick);
SetInitialLayout(context);
appWidgetManager.updateAppWidget(appWidgetId, views);}
super.on Update(context, appWidgetManager, appWidgetIds);}
Manifest
<receiver android:name=".Widget" android:label="@string/widget_name">
<intent-filter>
<action android:name="android.appwidget.action.ACTION_APPWIDGET_CONFIGURE" />
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
<action android:name="test.CLICK" />
</intent-filter>
<meta-data android:name="android.appwidget.provider" android:resource="@xml/widget_mode_switcher" />
</receiver
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Sep 9, 2010
I have a widget and I would like to detect position where user click on some part of the widget's bitmap. I didn't found any way how to detect coordinates of the touch on RemoteViews.Is anybody aware of some trick how to detect it. Only idea I have is create layout with grid of transparent buttons, put by widget's bitmap as background of such a layout and to every button set PendingIntent.
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Aug 4, 2010
Is it possible to write service that can catch any user's click on the touch screen and read text of the click no matter what application currently is active?
For example user click on browser or any other application and that service will know what word is written in the location of the screen.
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Mar 22, 2010
How to create a transparent textview on click at the bottom of the running screen.
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