Android :: Content Of Activity Doesn't Appear / Why Is So?

Nov 23, 2010

I start a new activity when clicking on a button , but the content(ui components) of the new activity doesn't appear , why ? code...

Android :: Content of activity doesn't appear / why is so?


Android :: Update Doesn't Work When Using Content Resolver?

Mar 5, 2010

I have this code for update:
public Boolean update() {
try {data.put(Contacts Contract.Groups.SHOULD_SYNC, true);
Content Resolver cr = ctx.get Content Resolver();
Uri uri = Content Uris.with Appended Id(Contacts Contract.Groups.CONTENT_URI, Long.parse Long(get Id()));
int mid = cr.update(uri, data,_ID+"="+get Id(), null);
// notify registered observers that a row was updated
ctx.get Content Resolver().notify Change(
Contacts Contract.Groups.CONTENT_URI, null);
if (-1 == mid)
return false;
return true;
} catch (Exception e) {
Log.v(TAG(), e.get Message(), e);
return false.

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Android :: Changing Content Of Activity Run Time

Jul 24, 2010

I created an activity by using a layout written in a XML file. I would like, in response to some events, to change the content of this activity. I would like to show a VideoView over the content. In response to some other event, I may want to go back to the first content. Would it be possible to switch the content of the activity this way without running another activity (I have another technical difficult in doing that)? I tried using setContentView( videoView), and then switching back with setContentView(T.layout.main), but it seems that, when going back to the main layout, all my buttons and text boxes are created again as they were new. Would it be possible to go back to the last state of all the controls?

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Android :: Call An Activity From Another One - Content.ActivityNotFoundException

Aug 8, 2010

I am getting this exception while I am trying to call an activity from another one.. .The complete exception is android.content.ActivityNotFoundException:Unable to find explicit activity class {com.x.y/com.x.y.class};

I am doing an intent.setClass("com.x.y","com.x.y.className") where className is the name of my activity class and com.x.y is the package it resides in.

My AndroidManifest.xml has the following content:

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Android : Switch Activity Of Content Of Tab In Tabhost?

Dec 8, 2009

I have created a TabHost and in 1 of the tab, I have added the content using

mTabHost.addTab(mTabHost.newTabSpec("tab1")
.setIndicator(getString(R.string.dialerIconLabel),
getResources().getDrawable(R.drawable.ic_tab_dialer))
.setContent(intent));

Is it possible for me to switch the content's activity programatically after I called 'addTab of TabHost'?

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Android :: Use Resource Id But Didnt Set Content View In Activity?

Aug 12, 2010

May I know is it possible I use the resource id but I didnt set the Content View in the activity?

For example: abc.xml have one TextView id = "R.id.Text". Can I use the use TextView name = (TextView)findViewById(R.id.Text); method in the activity which was setContentView(R.layout.def);?

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Android : How Can Query The Contacts Content Provider Outside An Activity

Oct 8, 2010

I'm trying to query the Contacts content provider outside an Activity. But managedQuery is a method of Activity. Is there any other class/method that I can use instead of managedQuery?

Here's my code:........................

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Android : Content Provider - Activity.startManagingCursor And Simple Dao

Jun 1, 2010

I am writing simple app that will read callLog content provider transform data and write it to my own table. my app will not show data directly from calllog content provider.

1. now one problem that I have is I cannot limit how much rows query will return (by calling activity.managedQuery) but I assume that Cursor delays access to the db and I can use moveToNext as many times as desired to get few rows from table and the call will be efficient. is that good thinking?? OR am I wrong here? I really dont want to query all rows from table. is there any other way to access calllog??

2. I dont want to implement my own content provider for my app. I will use rawQuery many times and group data so contentprovider's callbacks are not enough for me. more I want my dao to be private to my application so I think there is no need to bother with conentprovider. and If I got this right I also dont need to bother with activity.startManagingCursor as long I query data inside same method call (because I need to deactivate all intermediate Cursor objects anyway)

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Android :: Pause Flash Content In WebView When Activity Isn't Visible?

Aug 7, 2010

I am experimenting with using a WebView to display Flash content inside my activity. Everything is working pretty well, but when the user hits the home key to put the activity into the background, the Flash content keeps running (sound keeps playing, etc)

I have noticed that both the stock Android browser and Dolphin Browser seem to avoid this problem, and properly pause the Flash content when the browsing activity is put into the background.

Ideally I would like a solution that kills the WebView completely if the activity is finishing, but pauses it otherwise (basically copying the default behavior of the browser)

Here is a simple test I put together that loads a game on Kongregate which has some background music:

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

I took a look at the latest source for the stock browser, and it seems to be doing something similar (calling pauseTimers/resumeTimers), although I fear the code I have been looking at is out of date, because it is calling functions that don't seem to exist anymore.

I did verify that the call to pauseTimers is working by testing with a simple JavaScript setInterval which updates a counter. Is there something else obvious that I should be trying in regard to Window or View management?

The documentation for the mobile Flash player says:


Flash Player will also automatically pause SWF playback it is not in view or the foreground application, for example when a call is received or alarm goes off, to reduce CPU utilization, battery usage and memory usage.


This seems to be working perfectly in both the stock browser and Dolphin Browser, but not in my app. Any ideas/solutions would be greatly appreciated!

Update: Here is the function we ended up adding to our activity to get this to work. We call it with "onPause" in the activity's onPause function and "onResume" in the activity's onResume function:

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

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Android : WebView - Not Able To Go Back To My Activity Screen Once The Content Is Displayed

Apr 9, 2009

Step 1: I am subclassing WebView and rendering html content properly. The intial content is very small with a div and image /link This is displayed in a LInear Layout along with a TextView and ListView. That is my first screen/activity of the application.

Step 2: When I click on a link on this webview, it goes through the webViewclient and expands to full screen to fit the content of the requested page.

After Step 2, I am not able to go back to my activity screen once the content is displayed. When I click on the back button to getback to my activity screen close my activity and goes to the phone's applications desktop. (i.e goes out of my application).

Step 3: In order to fix this issue, I stopped setting my own subclasssed WebViewClient. After doing this, the it seems to render the clicked page in a webView as subactivity. Now When I click on backbutton, it goes back to the activity screen. But, the issue now is, I am not catch event when a link is clicked. How can I catch click events in this case.

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Android :: Activity To Show Directory Explorer To Browse Content Of Sdcard

Sep 20, 2010

In android, is there an activity show a directory explorer to browse content of sdcard?Like a File explorer in Java, it can show the content of current directory and I can move up to its parent by clicking '..' and move down to a child directory by clicking the name of the child directory?

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Android :: Trap In TabHost When AsyncTask Delays Set Content View At Activity Startup

Nov 3, 2009

I've got a tab host activity started from a home screen shortcut. When my application starts it downloads information from a server using an AsyncTask. In the onPostExecute method of the AsyncTask I call setContentView to display the TabHost.When I start the homescreen shortcut by tapping on the shortcut using my finger everything works as expected, I download the information from the server and display the TabHost with the information in the tabs. However starting the application by navigating to the shortcut with the mouse wheel and then clicking on the shortcut with the mouse wheel leads to a trap in the framework code as soon as my application starts. This looks like a simple fix since mCurrentView is null at the time that this method is called - can this issue be addressed? Does anyone know of any workarounds?

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Android :: Scroll View Doesn't Resize - Content Of Child View Changes

Aug 18, 2010

I have a WebView inside the ScrollView. The content of WebView dyanamically changes when it displays different html page. I have the following issue: For example I have A.html, and B.html. The content of B.html is larger than A.html, so the page is longer. When WebView load B.html, the ScrollView stretches its size to enable itself scroll for B.html, then if I go back to A.html, ScrollView doesn't resize itself. (The scroll area is exceed the content of A.html) What I want to have, is dynamic change the scroll area of scroll view to fit the webview's content.

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Android :: Sub Activity Doesn't Die - In Theme Dialog

Aug 27, 2009

I have an application with an activity A which creates an activity B (in theme dialog). I push the button in my activity B to finish it, i come back on activity A, it is ok. Then I press the button return on my G1, i go back on my home screen. And now if i do a long press on the home button, and i click on my application, it is the activity B which appears ! I finish my activity B, with this code : setResult(RESULT_OK); finish();

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Android :: Finish Activity Doesn't Work

Nov 5, 2009

In main Activity, I called start Activity For Result(intentB, 100) to start a new activity B, then in B, I called startActivity(intentC) to start another activity C. Lastly I wanted to call finish Activity(100) in C to close activity B, but seemed it was not successfully destroyed(I can use BACK key to see it's still there.)

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Android :: Changes To Library Doesn't Restart The Activity

Nov 5, 2010

I'm developing an application that uses a library project to store much of the functionality and content. When I edit the code and/or content in the library and then run the app, it doesn't properly restart the activity with the changes, giving the warning:

Warning: Activity not started, its current task has been brought to the front

I understand that this warning comes from the SK not thinking that there were any changes to the app, but there were (to the library, not to the app itself).

The only way that I've found to force the app to recompile with the library changes is to do Project->Clean. While this is effective, it's a bit annoying to have to do this every time a make a change. Does anyone know of a way to force the SDK to recognize that a library change should result in reloading the application?

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Android :: Back Button Doesn't Go To Previous Activity

Jul 4, 2010

I have two activities. The first is a list where the user selects one of the items which takes them to a second activity showing the details of the item they selected. When the user clicks the back button I want the app to return to the first activity.

Is there anything special i need to do to make this happen?

Right now when I click the back button from the second activity it exits the app just like the home button would.

Here is how I am starting the Second Activity. startActivity(new Intent(getApplication(), SecondActivity.class)); finish();

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Android :: OnSearchRequested - Doesn't Call Search Activity In 1.5

Oct 8, 2009

The 1.5 AVD doesn't seem to follow the documentation in: http://developer.android.com/reference/android/app/SearchManager.html

which says it's enough to call onSearchRequested() to call the search activity. I need to call startSearch() to make it work. However, when I check the source code of Activity.java, onSearchRequested() does call startSearch().

This works in 1.6.

Is this a bug in 1.5, or did I miss something?

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Android :: Droid Notification Activity Doesn't Display Occasionally / Can I Fix It

Oct 6, 2010

I have an android background Service that will occasionally post a notification to the Status Bar using the Notification class. Occasionally, when I receive a notification, pull-down the notification window, and select the notification from the list, the specified Activity doesn't start. When this happens, the screen dims (as if it were about to display the Activity), but the Activity is never shown. I included my code below...

NOTE: The UserNotification class extends Activity, and is set to a dialog theme in the manifest. This class also has its taskAffinity property set to "" in the manifest.

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Android :: Start Activity From Menu Option Doesn't Work / Fix It

Dec 9, 2009

I am completely exhausted to think logically right now..... I am sure it is pretty easy to implement

I have a menu item which when selected would call another activity class. I am using switch case to select between menu items. I tried creating an Intent to start activity using the Class name but doesn't work.

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Android :: How To Override The Back Button So It Doesn't Finish() My Activity

Jun 29, 2010

I currently have an Activity that when it gets displayed a Notification will also get displayed in the Notification bar.

This is so that when the User presses home and the Activity gets pushed to the background they can get back to the Activity via the Notification.

The problem arises when a User presses the back button, my Activity gets destroyed but the Notification remains as I want the user to be able to press back but still be able to get to the Activity via the Notification. But when a USER tries this I get Null Pointers as its trying to start a new activity rather than bringing back the old one.

So essentially I want the Back button to act the exact same as the Home button and here is how I have tried so far:

CODE:.........

However the above code still seems to allow my Activity to be destroyed, How can I stop my Activity from being destroyed when the back button is pressed?

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Android :: Screen Flip Doesn't Trigger An Orientation Change And Activity Destruction/recreation

Aug 29, 2010

I'm testing an app on a Droid. It's a kind of card matching game. I'd like to keep the cards physically located in the same place on the screen regardless of a screen rotation. For example, I can put my thumb on a card, rotate the phone any way I please and the card stays fixed under my thumb. However, the orientation of the content of the card will change to match the current phone rotation. I handle this by transforming the card grid in onCreate. This works fine for 90 degree rotations, but if I do a fast 180 degree flip from one landscape mode to another the screen simply flips and the Activity is NOT destroyed and recreated.

This seems contrary to the documentation:

http://developer.android.com/reference/android/R.attr.html#configChanges

"public static final int configChanges Since: API Level 1

Specify one or more configuration changes that the activity will handle itself. If not specified, the activity will be restarted if any of these configuration changes happen in the system. Otherwise, the activity will remain running and its Activity.onConfigurationChanged method called with the new configuration. "

I am NOT specifying any configChanges in my AndroidManifest.xml file, so it seems that the activity SHOULD be destroyed and recreated. Why isn't it? Is there some way I specify that it should be destroy/ recreated?

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Android :: Activity Which Downloads Data In Background With Service - Doesn't Get Destroyed On Hitting Back Button

Nov 9, 2010

I need to develop an application with downloads the data at the background and update about the progress in the front.

I guess this can be achieved using services and activity and passing data in between the. But, what I need to do is even if I hit back button and then start the activity again. It should check if the service is running or not. If service is not running it should start one else it should display the data from running service.

Something like music player where music is played by a service at a background and activity displays the information. Even on browsing through other activities of the application or hitting back, state of the music player is maintained.

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Android :: Switching Content Providers For Same Content URI

Aug 12, 2009

This may seem like a stupid question but I need to be sure. I was wondering if it was possible to pro-grammatically change the Content Provider used when making a query given a Content URI. The reason being I need to know if it's possible to force the Calendar/Contacts applications to read from a different database via a different Content Provider temporarily while my application is running, so that I can reuse those applications to display my own data. Since the Content URI s are hard coded in each of these applications the only way it might be possible is if we could somehow temporarily change the Content Provider used for a given URI. I know this probably isn't possible, I just need to show it isn't. Could someone confirm this can't be done?

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Android :: Android - Override The Back Button So Doesn't Finish - Activity

Jun 29, 2010

I currently have an Activity that when it gets displayed a Notification will also get displayed in the Notification bar.

This is so that when the User presses home and the Activity gets pushed to the background they can get back to the Activity via the Notification.

The problem arises when a User presses the back button, my Activity gets destroyed but the Notification remains as I want the user to be able to press back but still be able to get to the Activity via the Notification. But when a USER tries this I get Null Pointers as its trying to start a new activity rather than bringing back the old one.

So essentially I want the Back button to act the exact same as the Home button and here is how I have tried so far:

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

However the above code still seems to allow my Activity to be destroyed, How can I stop my Activity from being destroyed when the back button is pressed?

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Android :: Android: Why Doesn't Activity Appear Immediately After Calling StartActivityForResult

Sep 25, 2009

The application I'm currently working on consists of several dialogs and there is an issue with one dialog I still haven't found the cause.

Running the debugger the execution reaches the following two lines:

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

And then the onCreate() method in DlgLogin class executes as well

But the login dialog doesn't appear. If I leave the device idle for such long period of time that the screen turns off and then press any button on the device to turn it on the login dialog appears.

The dialog of course should appear immediately but so far haven't found the cause of the problem.

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Android :: Change Main Launcher Activity Doesn't "take"

Apr 6, 2009

After a long time with one Activity being my app's entry point, I just changed the manifest to point to a different activity to be the entry point. But the G1 is doggedly trying to load the old activity - even after uninstall, install, reboot, etc. and acore throws a security exception. Code...

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Android : Content Provider - No Link Between Content Provider And Its CONTENT_URI Declared In Another Class

Mar 1, 2010

I am having a hard time understanding content providers. In the notepad example and others, the content provider never even declares its CONTENT_URI anywhere inside itself, yet the docs say to publicly declare this. It's declared in a different class. So when an activity queries a content provider with a CONTENT_URI, how does Android know which one I want. I see no link between a content provider and its CONTENT_URI declared in another class.

I also don't how to think about intents and content providers. I know that you don't call an intent on a content provider. But an activity queries a content provider without an intent, and an activity has a mimetype attribute in the manifest that would seem to tie it to a content provider.

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Android :: Custom Content Provider Like Contact Content Provider?

Mar 11, 2010

how can i create a custom content provider like contact content provider? i know how to create custom content providers but i want to integarte to device such a way that it canbe accessed by all application installed in that device.

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How To Update Content Of Edittext On Third Row After Edit Content Of Edittext In First Row

Jun 20, 2012

i have a listview (i use a custom adapter) with 10 rows and each row has edittext how will i update the content of edittext on the third row after i edit the content of edittext in the first row.

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