I'll preface this with, I've just started learning Android so be gentle.
I come from an ASP.NET / Silverlight background so I was looking for something along the lines of controls.
I want to reuse a layout (a ListView item template) in other layouts.
Such that in my other layouts I can just add <myListItem /> to show it.
Is this, or anything like it possible? or are there better ways?
View 3 Replies
Imagine I have a toolbar implemented as a horizontal LinearLayout as follows:
[___Button1____] [___Button2___] [___Button3___] [___Button4___]
When someone clicks on Button2, I want the toolbar to change to:
[___Button1____] [___________Button2___________] [___Button3___]
The toolbar should transition from the first state to the second state through a smooth animation. I would like to use a scale animation on Button2, and while that is happening, Button3 and Button 4 should move to the right (while the animation is going on). At the end of the animation (or maybe during), I will fade Button4 out.
Question: How do I achieve an animation of the layout of the toolbar such that only one component (i.e. Button2) is being scaled while the others are not being scaled - the layout is simply updated during the animation of Button2.
I looked at LayoutAnimationController, but it does not appear to allow me to either:
1. specify different animations for the different components, OR
2. indicate that only animate one component and don't animate the others.
I can't scale the entire toolbar because that distorts Button1/3/4 which I don't want.
I have created a simple class named Panel which extends the SurfaceView class and does some drawing in the onDraw method. When I use it from the code it works fine. For example this works as expected:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new Panel(this)); ....
However when I try adding this component from an xml layout the program crashes:
XML file (main.xml):
<?xml version="1.0" encoding="utf-8"?> <org.anddev.Panel android:id="@+id/panel" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"/>
Code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);....
Error msg: Sorry!
The application Test (process org.anddev) has stopped unexpectedly. Pleas try again.
I can not figure out why the same class works when created in one way and doesn't work when created in another.
I have a res/layout/main.xml including these elements and others:
<some.package.MyCustomView android:id="@+id/foo" (some other params) />
<TextView android:id="@+id/boring" (some other params) />
In my Activity's onCreate, I do this:
setContentView(R.layout.main);
(TextView) boring = findViewById(R.id.boring);
// ...find other elements...
MyCustomView foo = (MyCustomView) findViewById(R.id.foo);
if (foo == null) { Log.d(TAG, "epic fail"); }
The other elements are found successfully, but foo comes back null. MyCustomView has a constructor MyCustomView(Context c, AttributeSet a) and a Log.d(...) at the end of that constructor appears successfully in logcat just before the "epic fail".
findViewById() returns null for custom component in layout XML, not for other components. Why is foo null?
I am creating an Android library that does stuff like http requests, etc, that uses android.jar objects. There will be no manifest or resources, etc, however. What is the best practice regarding the JUnit library to use in this library? DO I use standard JUnit, or the one included in android.jar?
View 5 Replies View RelatedI have developed some reusable android component which is basically a class . This class has some resource dependencies e.g. some png drawables, some xml layouts etc. So this class referenced the auto-generated R file.I would like to distribute this code in a single package like jar file to other developers for use in their applications.I have read that the only possible solution is to distribute code together with all my resources, which others have to copy to their "res" folder (source).So I created a jar file having the class file (say MyClass which is in the package com.xyz.android.app) and resources and tried to use this in my new application.So I added the jar file to my new applications build path using add external jars option in eclipse and copied all the resources to my new application's res folder. (The activity class say MainActivity of my new application is in com.abc.myapplication package, just for the case if it may helpful)
But when I run this new application there is java.lang.ClassCastException in the MyClass class. I tried to debug the application and then I found that in the MyClass class, there is "R cannot be resolved" problem. Then I changed MainActivity's package to com.xyz.android.app (which is not the way, other developers will be happy to do), But again the same problem.But When I just copy the source java file such that both Main Activity.java and MyClass.java are in com.xyz.android.app package then application runs fine.So if I need to distribute such that other users need not to bother these package naming things,how can I accomplish this?
Can anybody tell what is the equivalent component in android like table view in iphone?
How to implement table view component like iphone in android?
I was wondering how everyone re-uses android layouts and components? Do you do the old copy/paste the existing code into the project, or is there a way to include the layouts and components into a jar file for re-use? For example if I have a list view, maybe I have another view that I am using for each list item in the listview, it could have an icon, and maybe a header row, and then a row with more details. While it is not hard to create this, it would be nice to be able to create this once generically and re-use it in different projects.
View 1 Replies View RelatedIf I have an EditText component on my screen that I have specified inputType="decimal" for (i.e. a numeric/decimal field), what is the best way to convert it to an decimal value in the application code?
Google recommends avoiding floats, and avoiding creating objects unnecessarily (and I assume any auto-unboxing code is bad too), so I take these as my constraints. I realize a small application probably doesn't need to worry too much, but I haven't been able to find a 'best-practice' solution to this.
The most common solution appears to be this:
double value = Double.parseDouble(txtInput);
I know it is possible to develop a full flex application using AIR for android but what I need is to embed a flex component into an already existing classic Java android application.
I found some flash players in java but they all either require a JFrame or include of specific windows dlls.
Is it even possible ? I found no info on the net about this
I will be going out of town to my moms, whose tv supports Component, but not HDMI. Any accessory out there for this?
View 7 Replies View RelatedI am putting one spinner and one button using following code. Can some one tell me how can i put some space between it?
View 4 Replies View RelatedService Component is used to do some task which can be done without user interaction. But for that we have to run a thread in subclass of the Service. I think we can create a thread in Activity class itself then what is the use of Service component? Why don't we create another thread and write the non interacting code in this thread.
View 10 Replies View RelatedI have almost completed my Android application so am considering ways of distributing the application. I have seen some applications on Market have free limited/locked version and separate Unlock Key/License Key which unlocks extra functionality. How is this done? Has anyone here done this? If so, how well does it work? I am thinking maybe this is better then having two versions of the same application (i.e Lite and Pro).
View 1 Replies View RelatedI've created a custom component which works like a lock of a safe. customspinner - Project Hosting on Google Code on picture you see two different objects of my component.
If you need to create UI when user need to choose some element of a list, using this non standard component will be more intresting for user. And it is usefull - user can scroll and find a needed value very quickly.
A component I have created works fine if I put it in the main project and reference it from any res/layout xml, but when I put it in a project on which the main project depends, I get a ClassNotFoundException in the xml.
Whilst after compiling the interface works fine, it is a pain in the * to design an interface without seeing what I am doing because of the error. Does anyone know how to solve it?
Stacktrace:
CODE:.........................
I am trying to integrate VP8 video codec into PV opencore FW in Froyo & test at PV test application level. I have done the following steps, 1. Made a new folder for vp8 @ external/opencore/codecs_v2/omx/ omx_vp8. 2. Made appropriate modifications in the omx_baseclass, omx_common etc. 3. Modified the PV test app (external/opencore/codecs_v2/omx/ omx_testapp) for testing VP8. 4. included the VP8 source code to froyo. 5. Included new oscluuid for VP8 With these modifications, the build is fine. The shared libraries and binaries are creating properly. Also OMX-MasterInit is passing. But the application fails at OMX_GetHandle(). *pHandle is coming as zero. I am using the PV OMX core. I am just adding a new codec which is not supported by PV Opencore and test at PV test_app level.Can you please answer my below queries: 1. Do we need to change the pvplayer.cfg file? Bcoz i am using the PC omx_core itself. 2. Any other changes needs to be done for integrating a new component into Opencore? Please provide you valuable inputs. Let me know if need any additional informations.
View 4 Replies View RelatedMy company is in the process of evaluating if we can add support for Android to our product. I am currently working on porting our existing J2ME library to the Android framework and I have a question regarding our UI component. Right now, we have a custom menu that we allow our developers to bring up on the device. On J2ME, we simply have a single call that the developer makes to enter into the menu and then we handle the rest. On Android, it seems the best way to handle this is an Activity. But I have a few questions regarding this approach including is the really the best way to do something like this? Second, if it is, if there are multiple applications on the device that are using our library, are there going to be conflicts with them all having the same Activity embedded in them? Is it possible to create an Actvity at runtime and use it directly? Would there be any side effects of going about it this way?
View 2 Replies View RelatedI am working on couple android applications which share a common component. The component has Activities, Service and own AndroidManifest.xml. After research, it seems there is no concept of run time share library among applications in Android. So I am looking for a way to linked the share component with other applications at compile time. Applications which will use the component can come from external, therefore I will only provided the compiled file. I would like to build the component into own apk or jar file, can external application include my jar/apk file into their package and be able to start my activity? Please share your experience and advice.
View 3 Replies View RelatedI am looking for a calendar UI. Something like the Calendar UI of the Calendar Android Application but only with the view. (I know that's open source so I can extract the UI but it's a long process to remove all the staff unnecessary) Is there any open source Calendar UI project for android ?
View 2 Replies View RelatedIN our current project, I need to make a UI describled as follows.
Basically it is a text input, it will display a string returned from server , such as "I like banana". The word "banana" will be in red color. When user clicks "banana", it will have a dropdown list shows "apple, orange, pear". User would be able to select one of them, like apple. So the text in that UI would be "I like apple".
How could I build such a UI component in Android.
How do i do a if statement but i want like: else if not edittext.getText.toString.contains("hello") then doCode. and how do i setfocus on a component and remove the focus can not really figure that out.
View 2 Replies View RelatedI want to make Ticker Component but i dont know how to do this. I have seen "Marquee" but it start scroll on focus but i dont want. I want to scroll text if it is focused or not means in both conditions.
View 3 Replies View RelatedI am doing authentication with a third-party site that's supposed to redirect back to my app with auth token (OAUTH).
I have the callback working properly if I open the 3rd party site in a separate browser process via this.startActivity(new Intent(Intent.ACTION_VIEW, uri));
But, if I embed a WebView component in my layout, and open the url in that, the callback does not work. Webview says "You do not have permission to open myapp://callback?token=...." and quickly refreshes to "Web page not available...temporarily down..."
I am trying to get a SharedPreferences object from the PreferenceManager but don't want to pass in the Context to the class.
Can I get a "global" context from inside my class?
CODE:...................
First of all let me say that i am new to the JNI. However, i gathered some knowledge about it. As i was going through the android_media_MediaPlayer.cpp in ase mediajni to understand the way of operations of the android media framework, i saw the signatures of the JNI functions don't contain JNIEXPORT and JNICALL macros. Have these macros become redundant in JNI 1.4?
View 2 Replies View RelatedI am a game developer and have developed a nice global high scores module. The source code is in two different games of mine and anytime I make changes I carefully copy and paste the java files from one project to the other. As I increase the sophistication of this module, the copying and pasting can take a day or two to make sure I get it right. Now I am finishing up my third game and want to add the high scores module, but copying and pasting this in three separate projects seems absurd and will take up much of my time! Is there any way to externalize this module?
Unfortunately, the module makes reference to R for strings, layouts and other resources. It also uses common Android functions and resources from the Android library. Almost anything would be easier than the method I am using now--so any and all suggestions are welcome!
I developed my application and tested it on android emulator 1.6, 2.1 & 2.2 and on HTC Magic
its running PERFECTLY and the gui components look very neat...
However, when I tested it on Sony Ericsson Xperia X10 the gui components are looking fuzzy........
I'm trying to create a component using an xml layout file. I defined a layout with some custom attributes. This layout is inflated when user add it inside another layout. My problem is I don't know the parent, so I pass null for the parent viewgroup when I call inflate method. I think that's the reason why I see anything in my view. Do you know how can I do (I don't want to redefine onDraw method because I use existing component). Below my xml layout and my custom class.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content">
<ImageView android:id="@+id/img_btn_option" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
<TextView android:id="@+id/txt_btn_option" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_toRightOf="@id/img_btn_option"
android:textColor="@color/font_white" android:textStyle="bold"/>
</RelativeLayout> public class ButtonOptionsView extends View {
public ButtonOptionsView(Context context, AttributeSet attrs) {
super(context, attrs);
LayoutInflater li =(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
RelativeLayout vg =(RelativeLayout)li.inflate(R.layout.button_option, null);
TypedArray ta = getContext().obtainStyledAttributes(attrs,R.styleable.ButtonOption);
((ImageView)vg.findViewById(R.id.img_btn_option)).setImageResource(ta.getResourceId(R.styleable.ButtonOption_image,0));
((TextView)vg.findViewById(R.id.txt_btn_option)).setText(ta.getResourceId(R.styleable.ButtonOption_text,0));}
I've made a little test component that overrides ImageView, called myImageView, and prints some text and an arrayList of Doubles over whatever image is specified in the related xml. However, right now, the text and Doubles that are drawn over the image are defined within the myImageView class. Is there a way to pass the data from the main onCreate function to the myImageView class before the layout is drawn?
I'm new to OO programming, but based on my understanding of this:
http://developer.android.com/guide/topics/ui/custom-components.html
It's possible because ImageView is just like any other class. This leaves me with two initial guesses:
1. I could generate my test data in the main onCreate, and store it in the array's xml file, and then read that xml file with myImageView,
OR
2. I could extend view instead of ImageView, but because of my new- ness, then I would lose the ability to use it in an xml layout sense - and that's what I really want.