Android :: Any Set Style Method At Runtime In Layout File?

Feb 1, 2009

I created my style in styles.xml, lets say MyStyle. I can use it in any layout file by style="@style/MyStyle". Also my generated R class have R.style.MyStyle, my question is if I can use it at runtime to "setStyle" - unfortunately View doesn't have such a method. If not what is R.style.MyStyle used for? (I already know that custom themes IDs are also in R.style and can be used to setTheme, but MyStyle is not a theme).

Android :: Any Set Style Method at Runtime in Layout File?


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Android :: Any Way To Set Style For View At Runtime?

Sep 3, 2010

Is there a way to set a style for a View at runtime? I've seen this question a few times on the board here but no answers, so probably not:

<ImageView android:id="@+id/blah" style="@style/mystyle" />
// later... ImageView iv = (ImageView)findViewById(...);
iv.setStyle(R.style.myotherstyle);

Is it not possible to do something like this? We have to manually change everything in code instead?

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Android :: How To Know An Opengl Method Is Implemented - In Runtime

Sep 13, 2010

I mean in runtime. Sometimes I get "called unimplemented OpenGL ES API" error but it can not be catched. Is there a way to figure out what function is implemented or not, in runtime?

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Android :: Instantiating A Layout Defined Via XML At Runtime

Oct 18, 2010

I have a ListView that I want to populate with objects whose layout is defined via XML. Is there a way to instantiate a layout at runtime, editing stuff like the Android layout ID, etc., and then load the new layout into the list?

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Android :: Building / Using Runtime Generated Layout XML

Dec 21, 2009

I am currently working on a project which requires me to use an XML document to render a form on an Android device. The form must be fetched and displayed at run-time. I am wondering if there is a way to tag the form XML, transform it using XSLT into an Android layout XML, and then have the device render it.

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Android :: How Set Button's Layout Width At Runtime?

Oct 15, 2010

i' making a remote-app, so i need a varying number of buttons, grouped by tableviews and tablerows.i can create the fix ones (that must alwasy be available) at designtime via xml, making use of the layouts making all buttons fit on every resolution.but there are buttons i have to create at runtime.to make them behave the same way as the fixed ones, i need to assign the layout width, -height and -weight values.i was searching the whole documentation, but there it's alwas done in xml, no word about runtime / matching routines.

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Android :: Dynamic Layout Change During Runtime

May 25, 2010

For an application I need to place some objects at the exact position that I want to have them and therefore I need to use AbsoluteLayout this time.

I want to add buttons dynamically exactly like in the following XML - but during runtime.

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

How can I archive this? I tried it with the following code to add a button, but I haven't found a function so far to set layout_x and layout_y. How can I do this?

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

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Android :: Change LinearLayout Layout At Runtime

Aug 25, 2010

I want the ability to re-arrange Views in a LinearLayout, without specifying specific pixel locations, at runtime. for my proof of concept, I have a layout with 2 TextViews, one red, and one black. The red TextView is on the left. I want onClick to set it to be on the right, without adjusting margins, as if I'd re-written the XML of the layout, with the red TextView second.

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Android :: Choose Button Layout To Include At Runtime

Dec 17, 2009

I have a complex dialog-layout that has to be customized for small screens to decrease its height on such devices. This can easily be achieved by decreasing the height of several single Buttons and Textfields in the layout, each by a small amount. Of course much of the layout still stays the same, so I figured I could use the <include/>-tag. This was the idea:

/res/layout/dialog_layout.xml ==> includes "@layout/include_button_layout"
/res/layout/include_button_layout.xml /res/layout-small/include_button_layout.xml

I figured that android would choose which button-layout to include at runtime. I couldn't get it to run, so I guess I was wrong. And if so, can anyone confirm whether this is the way to do it?

/res/layout/dialog_layout.xml ==> includes "@layout/include_above_buttons"
==> includes "@layout/include_button_layout_default"
==> includes "@layout/include_below_buttons"
/res/layout/include_above_buttons.xml
/res/layout/include_below_buttons.xml
/res/layout/include_button_layout_default.xml
/res/layout/include_button_layout_small.xml
/res/layout-small/dialog_layout.xml
==> includes "@layout/include_above_buttons"
==> includes "@layout/include_button_layout_small"
==> includes "@layout/include_below_buttons"

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Android : Load Layout Dynamically At Runtime In Droid?

Nov 20, 2010

My application requires 2 screens and for this I have created two different XML layout files using RelativeLayout. One layout file loads whenever I run my Activity. Now I want to load the second layout on to the same Activity , when user click on a button in OptionsMenu and also when user press Back button the first screen loads instead of exiting the application. So that i don't need to create another Intent in my application.

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Android :: Layout Does Not Take Text Style From Styles.xml

Dec 15, 2009

I've got a text style defined in styles.xml. I'm trying to reference it from a layout. When I reference from the layout, it causes an exception upon inflation. If I use the style from java code, it works fine. Setting the individual styles on the TextView works fine too:

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

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Android :: Settings Screen Layout Style

Dec 24, 2009

I am creating a new settings screen for my app and want to keep the look and feel similar to that of the standard applications. I have seen many 3rd party apps also follow this style (Twidroid for example) and would like to know how best to go about creating this look?

Is there a "template" or Activity I can use or is it a case of constructing it from a table layout or similar?

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Android :: How Do I Style Buttons In A Linear Layout Like A ListView

Mar 12, 2010

I have a vertically orientated Linear Layout with some Buttons in it:
<Linear Layout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical">
<Button android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/bt1" android:text="Button 1"></Button>
<Button android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/bt2" android:text="Button 2"></Button>
<Button android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/bt3" android:text="Button 3"></Button>
<Button android:layout_height="wrap_content" android:layout_width="fill_parent" android:id="@+id/bt4" android:text="Button 4"></Button>

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Android :: Layout Preview Doesn't Work Properly When Using <style>

Oct 29, 2009

When I include <style> elements from /res/values/styles.xml the Layout designer/preview within Eclipse doesn't update with these styles, but shows as it would be without any styles.Can anyone confirm this issue? If so, Is there a way I can fix this myself easily? If not, where's the appropriate place to sumbit a bug report?

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Android :: Eclipse Doesn't Recognize Style In Droid Layout Builder / Why Is So?

Nov 4, 2009

Since Android supports styles and it's good practice to use them (similar to CSS), I made a new style and applied it to 3 buttons.

The Layout builder in Eclipse did not register the changes and either broke (showed nothing) or didn't apply styles at all.

After running the app in the emulator, styles are correctly applied.

So is there something I'm missing or the Android plugin doesn't support styles?

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Android : When To Use "android:attr" / "android:style" In Layout XML File?

May 19, 2009

I got a little question on when to use "style" and "android:theme" in a layout XML file.

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Android :: How To Layout Image Buttons In A Grid View From Xml Layout File

Jan 23, 2009

Is it possible to build a GridView object in XML with 3 columns and 4 rows of Image buttons? It doesn't seem to have similar containment relationship like LinearLayout or RelativeLayout viewgroups.

I want to do this entirely in an xml layout file. When I put ImageButton xml tags inside a GridView xml body, The layout panel in eclipse is throwing an exception: UnsupportedOperationException:addView(View, LayoutParams) is not supported in AdapterView.

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Android :: Dynamically Loading JAR File At Runtime

Mar 18, 2009

I am storing the required test.jar file in the /sdcard. I want to load it dynamically at runtime and want to execute a function xyz() resides in that. For this purpose I had written following code:
But got ClassCastException : dalvik.system.PathClassLoader

Following is my code ,
import java.io.File; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.net.URL; import java.net.URLClassLoader;

import android.app.Activity; import android.os.Bundle; import android.util.Log;
public class Collabera extends Activity {
/** Called when the activity is first created. */
private static final Class[] parameters = new Class[] { URL.class };
public static void loadURLClass(String classPathURL) throws IOException {
File f = new File(classPathURL);
URL url = f.toURL();
URLClassLoader systemLoader = (URLClassLoader) ClassLoader.getSystemClassLoader();
Class systemLoaderClass = URLClassLoader.class;
try { Method method = systemLoaderClass.getDeclaredMethod("addURL", parameters);
method.setAccessible(true);
method.invoke(systemLoader, new Object[] { url });
} catch (Throwable t) { t.printStackTrace();
throw new IOException( "Error, could not add URL to system classloader");
} }
@Override
public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i("See","**************Before Loading Class Path**************");
try { Class.forName("test.Test1");
} catch (ClassNotFoundException e) { System.out.println(" Test Class Not Found ....");
} Log.i("See","**************After Loading Class Path**************");
try { loadURLClass("//sdcard//test.jar");
Class c = Class.forName("test.Test1");
Log.i("See"," Test Class Found ....");
Method method = c.getMethod("xyz", null);
Object o = c.newInstance();
String s = (String) method.invoke(o);
Log.i("See","Got method: " + s);
} catch (ClassNotFoundException e) { System.out.println(" Test Class Not Found ....");
} catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace();
} } }

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Android :: Changing Colors.XML File At Runtime

Sep 9, 2010

I have an application where I would like the users to be able to change the theme. Currently my layout have elements like this: <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@color/background_transparency"> what I would like to do is to change to a new colors.xml that has a different value for "@color/background_transparency" if the user selects one of the themes available. Alternatively to be able to change the value of "@color/background_transparency" in code.Is this possible? Or am I doing this the wrong way.

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Android : Application - At Runtime Calls An Xml File From Some Path Of The System

Jul 30, 2010

Hi, I want to create an application in android which at runtime calls an xml file from some path of the system.And make that contents of the xml file run in the same application.Could i get a feasible code because at runtime the bytecode of the activity is already created.how do i compile and run the activity and runtime.Also i was facing problem reading the xml file.Need some suggestions asap.. Thanx in advance!!

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Android :: AddView And Layout Method Doesn't Work Together

Sep 9, 2010

In Android when I am adding a view object like ImageView to FrameLayout view and then immediately trying to call layout() method to repositioned the added view object it is not working. But when I call the layout method alone after some new event e.g. touch event then layout() seems to work. This also happens when bringToFront() and layout() is used together, layout() does not seems to work together with other method. Is there any reason why is this like this? Also instead of adding view object in the middle of the screen can it be ADDED at some specific location in FrameLayout?

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Android :: Possible To Load A Layout XML At Runtime And Load Into Activity?

Sep 4, 2010

Is it possible to load a layout XML at runtime and load into activity?

In my app, I have various types of data like Person, Company, City, etc; The requirement is to dynamically load the layout, find views by tags (property names like Person.name, Person.address) and then fill in data. For example, if user has selected an object of type Company, we want to load a company.xml layout, inflate it and then associate various properties (company name, company slogan, city, address, revenue) to tagged views. One possibility I see here is - each view in the layout will be associated with property-name as tag and then appropriate data will be loaded in appropriate views.

What should be the best design you would recommend?

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Android :: Method To Search .ogg File

Sep 14, 2010

I want a method to search the .mp3 .wma.ogg file in the sd card and show in the listview.

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Android : How To Call An Activity Method From Another Java File

Oct 30, 2009

I have following problem: I have my "MainActivity". In this Activity, i start a thread (SaxParser in another "normal" java file). Now I want to call a method from the MainActivity out of the normal java file? I have read something of an Application object, but i only find things, where i have to create a new Intent. Is it possible to use the application object in the other "normal" java file like that: Code...

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Android :: Method To Capture Video To File Or Stream From OpenGL App?

Sep 16, 2010

Does anyone knows some convinient method to capture video to file or stream from OpenGL app on Android device? For example, can we capture video from a view, opengl view?

I just found out the following:
1) We can get frames using glReadPixels. (No video on this step?)
2) MediaRecorder can encode video, but how can we provide it our raw source, if possible?
3) Any working ports of ffmpeg(for example) or other encoding libraries? There are some tutorials of portng ffmpeg to use withing NDK. So, having raw frames and working port of ffmeg we can create video? Any issues on this step? Anyone managed to port any encoding library successfully? What components do I need from ffpmeg?

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Android :: Accessing Style Items By Style ID

Nov 15, 2010

Any View have a constructor public View (Context context, AttributeSet attrs, int defStyle) which called when View declared with a style attribute So, if I have some class inherited from View class, I can access to declared attributes (like "android:layout_width" or "android:background") via AttributeSet attrs in a constructor. But when I move attributes to style I cannot see attributes and values exists in a style - I want to read items declared in style but I have only styleID in defStyle parameter. Is there some way to read style Items using styleID?

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Android :: Runtime Error Using Exported - Signed Apk But No Runtime Error Using Eclipse IDE

Mar 2, 2009

1) I am developing my app in Eclipse 3.4.1 with Android (ver 1.1_r1) plugin. My app compiles and executes without errors when using the Eclipse IDE.

However, when I export my app (unsigned) using Eclipse (via {select project} >right-click>Android tools>export unsigned application package), sign it, and try to run it on the Emulator, it throws a runtime error when I try to update my sqlite database, at which time the specific error created is: SQLite error#14, unable to open database. It is able to read from the database without problems. (I have also verified that the database is: open, is not readonly, is not locked by another thread, is not in the middle of a transaction.)

I have limited experience, but this seems more like a "system" problem given that the app works OK in Eclipse IDE but then fails as an exported/signed apk. Some googling of SQLite resources revealed a similar error on a non-Android platform which was fixed by: "Set your permissions correctly on /var/tmp, or whatever directory you are using to hold temporary files".

Does Android have temporary files, and if so how does it handle permissions on temporary files? Is there a way to check or set these permissions to see if this fixes my problem here?

2) Not sure if it is related, but after I have run the exported/signed app which causes the runtime error, if I reboot the Emulator, and try to run the program using the Eclipse IDE , the program fails with the same exact error. PLUS I also noticed the following error message while the program is installing/running: 03-01 22:22:29.282: ERROR/PackageManager(53): Package com.northwestradiology has mismatched uid: 0 on disk, 10019 in settings; read messages:

I can restore the Eclipse version of my program to be able to execute without runtime errors by utilizing the -wipe-data option for the emulator. But note that if I run my signed APK using an emulator created with the -wipe-data option, it still throws the runtime error listed above...

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Android :: How To Use XML File To Specify Layout?

May 13, 2010

I've been trying to create a Compound Control in Android 1.5 (as described here) but haven't been able to find any good examples on how to do this using an XML file to specify a layout. Create Custom Component based on LinearLayout, declaring layout in XMLI'm fine with creating an Activity and then loading an xml file using the following in the constructor:
setContentView(R.layout.main);
However, I want to do this in subclass of LinearLayout - so I can use this compound component in other XML layouts. Something along the lines of:

public class CustomView extends LinearLayout
{ public CustomView(Context context) {
super(context);
setupView();
} public CustomView(Context context, AttributeSet attrs)
{ super(context, attrs);
setupView();
} public void setupView() {
setContentView(R.layout.custom);
// Not possible } }
What is the correct way of going about doing this?

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Android :: Specifying Id In Layout XML File

Nov 18, 2009

In my layout xml file, I have included other layout xml file (each with a different android id).But when I run it in the emulator, and start Hierarchy Viewer, each of the layout still shows 'NO_ID', and in my code, I have findViewById(R.id.test1) and findViewById(R.id.test2) both returns null.Can anyone please help me with my problem?

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Android :: Adding New XML File Under Layout

Mar 9, 2010

I am developing under eclipse.When I add a new .xml file under a layout and build my application,the resources are not generated for that file under R.java consequently the new layout is not recognized.How do I fix this.

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