Android :: Dynamic Loading Of Complete Layout File
Jul 1, 2010
I'm dealing with a problem you guys might not have faced earlier. I'm having a use-case in my Android application where the actual screen that I want to show to user is not stored in any layout file of my application. The layout of the of the screen is designed by server in this case, based on selection made by user on first screen.
Let me elaborate here,
1st Screen : List of check box with different biller names. (Imagine I've selected 2 billers from this screen)
2nd Screen : (The screen that server has decided how it should look like)
* Header,
* 1st Biller name (Label)
* Amount for 1st Biller TextBox
* Image (a Separator image)
* 2st Biller name (Label)
* Amount for 2st Biller TextBox.
* Here there can be a checbox/radio/another TextBox anything.
* Image (a Separator image)
* Button (to submit above form back to server)
I hope makes some sense in what I'm planning to design. The current issues I'm dealing with are as below.
1). How to draw this dynamic widgets?
2). How to fetch user Inputs from this dynamically created widgets?
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Apr 29, 2010
How can we use more than one layout file. I have implemented a cutom dialog.That means i have created an layout file for dialog. And one layout file for my activity. But whatever the UI items in dialog layout ile if iam using them by findViewById it is giving me null
I will explain in details here @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); applicationContext=getApplicationContext();
Dialog folder=new Dialog(this); folder.setTitle("Creating folder"); folder.setContentView(R.layout.create_folder); TextView tv=findViewById(R.id.folder_text); //Here folder_text is in my second layoutfile ie in create_folder.xml //In the above statemet i got the null to tv variable. folder.show();
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Sep 5, 2010
I'm trying to find a way to open resources which name is determined at runtime only. Let me explain in more details. I want to have a XML that references a bunch of other XML files in the application apk. for the purpose of explaining lets say the main XML is main.xml and the other XML are file1.xml file2.xml...fileX.xml...
what i want is to read main.xml, extract the name of the xml I want (fileX.xml) for example. and then read fileX.XML. the problem I face is that what I extract form main.xml is a string and I can't find a way to change that to R.raw.nameOfTheFile
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Aug 20, 2010
I would like to make a single Android app for multiple Android versions (possibly every one of them)
My problem is that I want to check what is the version of Android the app is currently running on, and dynamically load a class which is version dependent. This part should be ok.
I just wonder how I can achieve that without compilation errors in my Eclipse project. I mean, the project is configured for a particular target (1.5, 2.1 ...), so if a class in my project is not compatible wich the selected target, it will result in errors.
Is there a way to export this classes even if they are not fit for the platform (I thought about a separated lib, but then again : how to compile theses classes into a lib without compilation pbs?) ? This should be ok since they won't be loaded until I ask them to after having checked Android version.
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May 29, 2014
I am developing an application. In that application i have 2 list view (a and b ), i need to load the content of the list view (b) according with the selected value of first list view(a).How its possible.
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Sep 10, 2010
I have a layout which might be a bit unusual.
The structure is the following:
CODE:..............
My customRelativeLayout at the bottom of the XML has a XML layout too:
CODE:.............
My CustomRelativeLayout:
CODE:.....................
What I want to do: I want to be able to change the position of my CustomRelativeLayout. It should be follow my touch. Its smaller than the SurfaceView and should "slide" above following my touch...
There are two problems:
The onTouchListener bind to mLinearLayout (in CustomRelativeLayout) is only triggered once and only for ACTION_DOWN. I see the log output only once The note never changes the position, it is never redrawn with the changed matrix... I see the output stated in onDraw never after the touch happened.
First might be because the SurfaceView also handles touch events. But I thought if the CustomRelativeLayout handles it first, it should work.
Thanks to Xil3 I was able to remove the wall I was run into...
Here is my solution:
My note xml:
CODE:.................
And here is my constructor:
CODE:..................
I also found a bug/feature/issue, which is absolutely new for me: When I remove the background in my note root element (which is currently transparent) the note is only visible within the 200dp width/height I have set in the inner LinearLayout. So its not fill_parent, its wrap_content even as I set it to fill_parent. So layout_width and layout_height only use the given fill_parent when a background is set...
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Feb 23, 2010
I've been trying to implement the tab UI described in this tutorial: http://developer.android.com/intl/de/resources/tutorials/views/hello-tabwidget.html I follow all the steps described in the process but I keep getting a runtime exception which I believe has something to do with the fact that nowhere in the tutorial I added the extra activities (songs, artists and albums) related to the content of each tab into the android manifest file. Am I correct? is this tutorial (like many others) faulty or incomplete?
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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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Aug 10, 2010
I was wondering if it's possible to set an automatic/dynamic margin (padding?) between elements in an Android layout without having to do it programmatically?
For example let's say there is a horizontal LinearLayout which is set to android:layout_width="fill_parent" and that contains five elements. Is there a setting that evenly shares the remaining empty space of the LinearLayout to the margins of the child elements?
See image at http://img63.imageshack.us/img63/8/margin.png
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Nov 17, 2010
I want to display contact information in a custom layout. My app lets the user select a contact, then I retrieve key pieces of info on that contact (phone #'s, email addy's, etc). I want to display them to the user so they look grouped logically. Sort of like a series of tables, so phone numbers, then email addys, then organization, etc.
I have a table format that I've been using in a different part of the app where I know the exact number of rows I'm adding and I have defined styles for the rows already. I want to reuse those styles for this data, but android sdk won't allow for you to set the style attribute programmatically.
I could create the tables in code and set all the attributes the same as in my defined styles, but it seems like a lot of extra coding.
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Jul 7, 2010
I try to add a table layout from Java code. When there are two fields in a tablerow it displays the first field only. How to display the entire row with all fields?
code... How to do this?
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Mar 2, 2010
I want to make a dynamic layout which contains mixed elements
[text] [checkbox] [button]
[text] [checkbox] [button]
[text] [checkbox] [button]
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Feb 16, 2010
I'm trying to get my first Android app stable enough for the marketplace, and I've hit a brick wall with one exception that I don't understand. Probably I'm doing something stupid, but I can't tell what, and after several hours googling and experimenting, I thought I'd see if I can get some help. My Activity extends ListActivity, and the parts I think are most important are extracted below:
GroupedListAdapter is a simple class that extends BasedAdapter to provide headings for sections of the list (not unlike the Fancy ListView tutorials that are floating around).
I create this in onCreate, and it works fine. Inside onListItemClick, I do some actions which will create a different set of list contents. I "clear" the adapter, which empties the contents, and call reload, which repopulates it. Then I call notifyDataSetChanged.
Most often, this seems to work, but also fairly often, I get the exception following the code snippets below - this seems to indicate the ListView is not in sync with my changes. Lately this crash happens 100% of the time under the simulator.
CODE:.........................
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Nov 8, 2010
I have a layout with dynamic content. It has a variable number of textviews. On each textview I have to attach an event, a click event. I have to pass to that event some kind of information to know what textview has been clicked exactly. How can I pass this kind of information or how is the android way to do it?
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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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Dec 11, 2013
These days I am working on a project that I need to modify some other android apk's arm elf .so file.Because I changed the code namespace in android Java, so I have to change the corresponding native code's namespace in .so file.
For example change the symbol Java_com_example1_Method to Java_com_example2_method (dynamic symbol). But I don't have the source code of the native code.The change only replace 1 or 2 chars, so we don't need extra memory allocation.
I have been struggled for 3 days with no results. how to rename the dynamic symbols in elf .so file, and recaculate the .hash section.
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Mar 4, 2010
Right now I have a class that extends LinearLayout and builds the view inside of the constructor using a series of addViews. I wanted to move this into an XML file, so I have the same view defined there. My problem is that I can't figure out how to load the XML file in the constructor of the derived class. I looked up the LayoutInflater stuff, but I wasn't entirely sure how to use it in that context. Do I need to call addView() with the result of the LayoutInflater? Is this even possible? The other issue is that the context object that is passed in doesn't have the LayoutInflater methods. I'm not sure if I need an instance of Activity to do that.
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Nov 17, 2010
in my android application there are number of images in drawable folder. in my layout two buttons: back and forward button.on clicking next and back buttons different-2 image get loaded on the same layout(common for all images). Problem:i am able to load images in next button click but as i click on back button no image got loaded.
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Sep 19, 2010
I need the java code for sending file from android and then a php code to accept that file and store in my server.
I tried lots of code available on internet but have not succeeded :( i am using latest Android SDK.
Please provide me with complete code if some one has. I am working on this issue from last 14 days and it's still not resolved.
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Apr 22, 2010
I am trying to laod the listview dynamically. There are three textviews inside a listview. The text to be set in the textview is fetched from the server. All this is working fine. I am able to fetch the text and am able to display it inside the listview.
The only problem is the position of the textview. The xml layout file is as under:
CODE:.............
If I look at this xml layout in the eclipse layout tab then it is displayed properly. Problem occurs only when the text is fetched dynamically.
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Jul 9, 2010
i created a custom layout where i have a couple of LinearLayout in a ScrollView. Problem is when i set my SetContentView to my custom Layout (when the application starts), the emulator gives an error and force closes! i don't know why. i have tried with another custom layout or set it to main and it seems to work fine.
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Apr 15, 2010
I am using below code where , i want to show dialog in front and loading content in background but not able to do the same .code...
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Jun 30, 2010
I have some xml files with a custom format (based on the scxml specifications) that I want my program to read. I've already written the code to read it, but I'm running into problems actually reading the file itself. I want the file to be compiled with the apk, as it will not be changed at all during run time. So I put the file (test.xml) in the res/xml/ folder, and got the inputstream by using:
getResources().openRawResource(R.xml.test);
But when I read in this inputstream it is complete jibberish, which makes me suspect it is being read in binary, as openRawResource() is often used for binary files like images, if I am correct. What is the correct way to do this?
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Apr 22, 2010
CODE:...................
This is the layout that I am inflating in the Adapter. Everything is displayed, but only the second textview which should be displayed at the bottom is getting displayed at the top. Can someone let me know the problem with this?
I I view this in the layout tab in Eclipse then it displays properly. The problem occurs only when the text is fetched dynamically.
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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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Nov 2, 2010
I have one html file and I want to load that html file in view for loading ping images. I was doing:
android:background="@drawable/tips"
This in xml file but how to load html file in view?
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Sep 7, 2010
I'd love to get some ideas on best practices for testing our Android software, especially for AT&T devices. We're using a Samsung Captivate, on AT&T. As you know, AT&T disables sideloading (no Unknowns Sources option in Settings->Applications). We need to have our QA team load our apk file onto these devices as part of our testing and validation process. We're willing to install the SDK if needed, and upload the apk file via USB. We are not willing to root the phone.
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Jan 19, 2009
How to load simple html file present in sd mmc card from web browser. It is mentioned in the net that due to security reasons this is not allowed. Is there any way to access the file from sdcard? Tried modifying private String homeUrl =
"file:///sdcard/index.html";
in BrowserSettings.java file but browser throws an error "could not be loaded".
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Sep 29, 2010
This should be very simple, but I can't find the answer anywhere. How do I load an html file (which I assume I keep in res/raw folder) into a webview?
neither mWebView.loadUrl("file:///raw/about");
or
mWebView.loadUrl("file:///raw/about.htmal");
works.
What's the correct syntax or arrangement.
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Mar 11, 2009
How are people here loading in their models? I'm just manually parsing a OBJ file into my own model class and drawing that.
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