Android :: Loading Resource Represented By R.attr.*
Nov 6, 2010
I want to load resource that is located in android.R.attr class.Next code failed to load resource with Resources$NotFoundException exception:
getResources().getString(android.R.attr.action); //action is a string resource
Also tried to load resource using:
getResources().obtainAttributes(android.R.attr.action)
No exception is thrown, but returned TypedArray array has nothing valuable inside it. At least I couldn't find anything that is connected to actual resource id or resource I'm interested in.So, how to load resources represented by android.R.attr.* ids?
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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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Sep 11, 2010
I am loading a bitmap from a resource like so:
Bitmap mBackground = BitmapFactory.decodeResource(res,R.drawable.image);
What I want to do is make some changes to the bitmap before It gets drawn to the main canvas in my draw method (As it would seem wasteful to repeat lots of drawing in my main loop when it isn't going to change). I am making the changes to the bitmap with the following:
Canvas c = new Canvas(mBackground);
c.drawARGB(...); // etc
So naturally I get an exception
java.lang.IllegalStateException: Immutable bitmap passed to Canvas constructor
So to avoid that I made a copy of the bitmap so that it is mutable
Bitmap mBackground = BitmapFactory.decodeResource(res,R.drawable.image).copy(Bitmap.Config.ARGB_8888, true);
Which avoid the problem however it sometimes causes OutOfMemoryExceptions, do know any better ways of achieving what I want?
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Apr 29, 2010
Currently I'm successfully loading and displaying an image from a webserver using the code below.
URL imgURL = new URL("http://www.xxx.com/myimage.png"); URLConnection conn = aURL.openConnection(); conn.connect(); InputStream is = conn.getInputStream(); BufferedInputStream bis = new BufferedInputStream(is); bm= BitmapFactory.decodeStream(bis); bis.close(); is.close();
canvas.drawBitmap(bm, 0, 0, null);
What I want to do is load it from a resource. I've put myimage.png into res/drawable and referenced the bitmap as follows :-
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.myimage);
However when I try to display it with canvas.drawBitmap(bm, 0, 0, null); I get a Force Close. What am I missing?
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Sep 15, 2010
I use this method couples of occasion to load text file to display as help file. But I don't know why the following code didn't work. It seems to hang and logcat says "OutOfMemoryError"? All I did was break this out as an separate activity.
---xml---
<?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/helptab"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/helptext"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</ScrollView>
---code---
import java.io.DataInputStream;
import java.io.IOException; import java.io.InputStream;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class Help extends Activity {
/** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.help);
InputStream iFile = getResources().openRawResource(R.raw.help);
try { TextView helpText = (TextView) findViewById(R.id.helptext);
String strFile = inputStreamToString(iFile);
helpText.setText(strFile);
} catch (Exception e) {
} }
public String inputStreamToString(InputStream is) throws IOException {
StringBuffer sBuffer = new StringBuffer();
DataInputStream dataIO = new DataInputStream(is);
String strLine = "";
while ((strLine = dataIO.readLine()) != "") {
sBuffer.append(strLine + " ");
} dataIO.close();
is.close();
return sBuffer.toString();
}
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Oct 13, 2010
Are there any Android phones that are multi-processor (multi-core/ cpu), where application threads execute concurrently on different processors?
There doesn't seem to be any explicit way of doing asynchronous file I/ O or asynchronous resource loading. So, suppose I put BitmapFactory.decodeResource() or Resources.openRawResource() into a separate thread. Will those methods play nice with the other threads, yielding during blocking I/O operations so those other threads can run?
If those methods rely on the thread scheduler to forcibly suspend them, then the separate resource-loading thread isn't going to help me get my application started any faster (although it will help it to be more responsive to user input).
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Nov 26, 2009
Is it possible to define an attribute value of a height attribute, for example, relative to its parent's height. For instance, I want the linear_layout's height to be 2/3 of its FrameLayout parent. I have a FrameLayout with two linear_layouts. The first linear_layout fills the entire FrameLayout and the second linear_layout overlaps the first but only 2 / 3 of its height.
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Sep 19, 2009
Resources.getDimensionPixelSize (android.R.attr.listPreferredItemHeight) does not work. So how to? And any other way to specify resolution independent dimension values in Java code?
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Jul 16, 2009
My operation procedure is as below: 1. Execute Cupcake emulator with WVGA-P skin. 2. Activate Contacts application, and select "Contact" tab. 3. Press "Menu" key and select "New contact" option item. 4. Discover that the middle of current layout isn't represented.
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Aug 3, 2010
I have an XML resource file:
<resources> <section>
<category value="1" resourceId="@xml/categoryData1" />
<category value="2" resourceId="@xml/categoryData2" />
<category value="3" resourceId="@xml/categoryData3" />
</section> </resources>
Using XmlPullParser, on the START_TAG, I can use:
int value = parser.getAttributeIntValue(null, "value", 0);
to get values 1, 2, 3...however:
int resourceId = parser.getAttributeIntValue(null, "resourceId", 0);
doesn't work...it just yields the default value 0, or whatever I change the default value (3rd parameter) to be. Does anyone know what I am doing wrong or if this is possible?
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May 4, 2009
I want to display a fancy 'loading' image at my app's startup time.
The problem: my startup code is mostly GUI related, hence needs to run on UI thread.
Is there a way to do both - that is run UI-related code on UI thread while an image is displayed to the user?
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Nov 2, 2009
I've looked through the documentation and I can't seem to figure out how to have the screen blured/greyed when I select an activity that may take a while to load.
This seems to be an Android standard (both the Camera app and the Camcorder app do it when first selected), but I don't see any documentation on it. I even tried looking through the source of these apps on git, but couldn't seem to find it.
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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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Sep 6, 2010
I am using the function decodeResource(Resources res, int id, BitmapFactory.Options opt).I am using it in the following way:
BitmapFactory.decodeResource(getResources(), R.drawable.image,opt);
My question is instead of using R.drawable.image which is an image in resdrawable folder, I want to use a image from sdcard.Is it possible? How to get the resource id of an image in the sdcard?
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Oct 11, 2010
I do have a lot of language specific resources. There's one point in my Android apps where I do get a resource value and need to translate this value into the matching id. The value is not neccessarily in the language specific file for the current language (en/de/...). It's somewhere in there ... and it's unique.
After reading the docs and this thread "http://stackoverflow.com/questions/3476430/get-resource-id-by-passing-name-as-a-parameter-in-android" I thought that "getIdentifier(String name, String defType, String defPackage)" is the correct way to go but I can't get it to work. The result is always "0".
This code is part of an activity and I'm on Android 2.2.
Is it possible that Android doesn't take all resource files into account and searches just in the current language specific one?
For an example
CODE:....
To make things clear. I don't want to mis-use string resources as a database. It's only one part that occurs on very rare situations.
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Jul 25, 2010
I will admit - I've never had a smart phone. Never. I was going to get one last year, but waited b/c I heard 2010 was 'the year of the smart phone' - and I'm glad I waited.Though I'd have to see it in person to know for sure, but I'm almost positive that DroidX will be my first smartphone. I'm VERY excited, but I want to make sure that I'm educated enough to use it for all it's worth (ie: my mom has had every iphone, but just leared to text message last month).Is there some place/book/thread/site that I can study which would tell me about smartphones from the very most basic all the way to the more advanced? I'm a smart girl, but I have to start somewhere!
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Mar 18, 2010
When I use the first,app will crash in emulator but the second run well, how can I fix the first. Code...
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Jul 20, 2010
If I am not wrong with the way android:sharedUserId is intended to work, then my question is how to avoid overlapping resource IDs? appt seems to aways start IDs at the same initial value (i.e. drawables at 0x7f020000), so there will be sort of conflict or ambiguation. As for now I failed to get that cleared w/o digging in OS sources. Or I miss anything, like magic "undocumented" appt option (not that aapt is documented at all)?
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Sep 4, 2010
My application has resource conflict problem. Did some investigation, seems like all the resources within the apk file are cached after they are loaded on demand. The cache is stored in Resources.java mDrawableCache. The key to retrieve the drawable from this cache is combining the data and assertCookie fields of TypedValue class. In my application, there are 2 resources, ex. a color background and image drawable, evaluated to the SAME key value.. So just wondering, how can it happen?BTW, I am using eclair SDK.
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Sep 15, 2010
Is it possible that a resource id (such as a generated id for a string resource) can be a negative int?Often, when defining a method that accepts a resource id, I want the caller to be able to specify a "null" value.For primitives this is not possible, but I'm wondering whether "any negative value" may be a good approach? Alternatively I suppose it would be OK to specify the argument as an Integer and take advantage of auto-boxing.Thoughts?
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Jul 19, 2010
Can this kind of files (buttons) be used to create android applications, or you must use predefined buttons?
http://graphicriver.net/item/tabletphone-user-interface-professional-.
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Oct 13, 2009
I had imported several .png files with names like 1.png, 2.png untill 59.png in my Android Project.But it gives this error:
Description Resource Path Location Type Syntax error on token "48", invalid VariableDeclaratorId R.java / TVGidsBelgie/gen/com/woutergo/tvgids line 14 Java Problem
How can i solve this?
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Nov 15, 2009
we can let aapt not compress the resource via command -0. which api can be used to check the resource is compress or not?
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Oct 3, 2010
I'm sure this is simple, but I've got myself confused over it.I have an image resource, such as R.drawable.myimage, and I want to convert this into a URI.I tried:
Uri selectedImage = Uri.parse("android.resource://com.my.package/" + resourceId);
but this just returns a NullPointer. The resourceId needs to be dynamic (so I can pass any image to it), not just a hardcoded "myImage".Any help please?
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Jun 15, 2010
How can i get the resource id of an image if i know its name (in android)
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Sep 21, 2010
I am looking for an efficient way to find out if a resource (mostly a drawable) is used in java or in an XML file.
The problem is, that on my current project the drawables are changed often and now I have some drawables, which might never be used.
Is there a tool/way to find those unused drawables without search each filename in the whole project?
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Nov 17, 2010
I have an apk (App1) that has a raw resource (res/raw/mytextfile.txt) and I would like to read that text file from another apk (App2). I define a content provider in App1 and I override the openFile(Uri, String) method as follows:
CODE:.......
App2 does the following to try to get access to mytextfile.txt:
CODE:.........
However, when I read and write out the contents of the BufferedReader, I get way more than just the contents of mytextfile.txt.
I played with this some more and found that the file desriptor returned to App2 is pointing to the App1 apk file. I wrote out the contents of the BufferedReader to a file and did a binary comparison to App1.apk. The two files were identical.
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Sep 2, 2009
Is there a way to get the resource id associated with an ImageView?
you can set one using -- ImageView.setImageResource() --
sure what be nice if there was a -- ImageView.getImageResource().
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Jul 8, 2010
In android docs, it is said that 140 still is ldpi, but when I change dpi to 140, I find mdpi resource is retrieved, can someone have idea? thanks a lot. btw, I read the code about how to get resource, seems ldpi's max dpi value is 131.25? Does google post the wrong doc?
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Sep 10, 2009
I have requirement to implement button in lockscreen. So i have added new image here *frameworksasecore es drawable.* And i have modified the Keyguard_screen_lock.xml. Here i have added the ImageButton view. And i have even modified the strings.xml to display different string. As in the following discussion it has told like this. *You must not add public resources because it would change the public API and thus make your Android phone/device potentially incompatible with other Android devicesYou must not add public resources because it would change the public API and thus make your Android phone/device potentially incompatible with other Android devices.* ** *Please find the previous discussion in the bellow link*
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