I am trying to get the value of a EditText in a dialog box. A the "*"'ed line in the following code, the safeNameEditText is null; i am assuming because the 'findVeiwById' is searching on the context of the 'AlertDialog.OnClickListener';
How can I get/change the context of that 'findViewById' call?
CODE:.................
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The problem seems to be that the Service class does not inherit the > findViewById() method.
View 3 Replies View RelatedThis question occured to me while programming a Android application, but it seems to be a general programming question more.
The situation is, I am extending (subclass-ing) an class from a library, and overriding a method. how do I know if I should invoke the method of super-class? and when? (in the beginning of the overridden method or in the end?)
For example, I am overriding the method "public boolean onCreateOptionsMenu(Menu menu)" from class "Activity" in Android platform. And I saw someone write "return super.onCreateOptionsMenu(menu)" in the end of the method, in an example. But how do I know it should be done this way? and it is correct or not? what's the difference if I begin my method with "super.onCreateOptionsMenu(menu)"?
first of all: yes, I read all the other threads on this topic. And not only those from this site... (you see, i'm a little frustrated) Most of them come with the advice to use "android:id" instead of just "id" in the xml file. I did. From others, i learned, that View.findViewById works different than Activity.findViewById. I handled that, too.
in my location_layout.xml i use
<FrameLayout .... >
<some.package.MyCustomView ... />
<LinearLayout ... >
<TextView ...
android:id="@+id/txtLat" />.................
I have a class defined as
public class viewGroups extends ListActivity
Somewhere in the class I have
objItem = new clsContactGroups(context);
I am wondering what is advised to be used here? Which context?
I know four choices, but maybe there are others...
this
this.getApplicationContext()
this.getBaseContext()
this.getParent()
I use this Context to show a Toast. So I would like to show on the front-most view visible.
For example, I have an activity that uses a utility class. I would like to be able to start an activity from the utility class and have the activity result sent back to the utility class.
The only way I could think of starting the activity was to pass the original activity to the utility class, so that the utility class could use the original activity to start the activity. The problem with this is that the activity is sent to the original activity, rather than the utility class.
I also thought of actually making the utility class an activity itself, but that would make using the utility class much more complicated.
Can anyone tell me how to access context of a class which is not an activity?
View 10 Replies View RelatedSo I'm defining a class that sets a Drawable attribute in an object. The problem is that I can't access the getResource().getDrawable(int resourceId) method unless I have some Context.
So what I did was to send to that class an activity instance (let's call it "act") and then I did:
act.getResources().getDrawable(R.drawable.whellchair)
but, when executing that line it throws a NullPointerException.
When idea how to accomplish this?
Sometimes I need to provide a Context object to call specific functions, such as
Intent intent = new Intent(context, MyClass.class);
in order to start a service
context.startService(intent);
Or, provide a Context object to do a query
Cursor cursor = context.managedQuery(uri, projection, null, null, null);
If this is done in a UI class which extends Activity, that's fine.
However, If I want to create my own utility class (a singleton) that doesn't extend anything and call these functions, I don't have necessary Context object. Now my workaround is to pass an activity reference while initializing the utility class and have that reference to call those functions. I'm wondering what's the correct way to do that. It should not be reasonable to have every class to extends Context so that it can call those functions.
I had come across a code snippet which calls for an activity without referring to any context. Before, i was considering that context is used to tell about the calling component. But as i came see that another component can be called without any reference to context, it makes me wonder what purpose it might be serving. please put some light on it.
Here is the code which calls for an activity without referring to 'context'
CODE:............................
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View 1 Replies View RelatedIs there a way to change the context menu look and feel? I want to add my own background, list item seperator and maybe the selector as well. I want to change it in famework so that i will get the customised menu every where i will use it.
Can someone point me in the right direction? As far as I could make out - Context menu is just an alert dialog with a list. Am I right? How can i change the look and feel and from where?
Is it possible to change the minWidth/minHeight values in Java context (not with XML widget definition)?
View 2 Replies View RelatedI have an Android project that branched into three different applications, app-1, app-2 and app-3, that apply some customizations. Currently there is a lot of code duplication, making maintenance a nightmare: do the changes in one of the branches, and then merge the other two.So we create a library project, named app-core, that factors out most of the duplicated code. So far so good.When I launch this into an emulator where the application was already loaded (before the refactoring), I get this exception:Re-installation failed due to different application signatures.A different signature? But I just added a line in the .classpath to link to the app-core Java project!
View 1 Replies View RelatedCan I somehow change color of texts in context menus? It has white color and the background is white too, so I can't see the text.
I'm using this ROM on my Xperia X10 Mini Pro.
I'm attaching some screenshots for better explaining of my problem.
Say for example I have a textview in class A,
and I want to change background color of textview from class B through a method...
how can I do it?
Can someone please help me find which item was long clicked in this method i need to determine which item was clicked so that if it is a favorite or not already i can change the "Add to Favorites" accordingly. Code...
View 3 Replies View RelatedIs there a way to get alert dialog results inline (like you can with most dialogs)? I want to determine what to do next inwith a dialog, but I can't figure out how to get the results back in the same method that I create the dialog from thus allowing me to continue in my logic flow.
void doStuff() { dlg = CreateDialog() dlg.show(); // shows the dialog and doesn't return till the dialog is dismissed
if dlg.getResults() == this) { doThis(); } else { doThat(); }
}
I have a requirement to create a control similar to UITabBar in iPhone, which is to be present on every activity of my application. UITabBar essentially is a battery of buttons exhibiting a TAB like behavior: every button maps to an activity. I have two solutions for this: 1. In the layout XML for every activity, I insert a <LinearLayout><Button/><Button/><Button/></LinearLayout> element. And then have a common listener class that will handle the button clicks. So, every activity will have an instance of this listener. 2. To create a custom Widget extending LinearLayout class, put all the buttons as its static members and let it handle the button clicks. Include this custom control in every screen.
View 3 Replies View RelatedI have a need to create a control similar to UITabBar in iPhone, which is to be present on every activity of my application. UITabBar essentially is a battery of buttons exhibiting a TAB like behavior: every button maps to an activity. I have two solutions for this: 1. In the layout XML for every activity, I insert a <LinearLayout><Button/><Button/><Button/></LinearLayout> element. And then have a common listener class that will handle the button clicks. So, every activity will have an instance of this listener. 2. To create a custom Widget extending LinearLayout class, put all the buttons as its static members and let it handle the button clicks. Include this custom control in every screen. I am not sure which approach to follow.
View 2 Replies View RelatedIs it possible to send an HTML email with an inline image via the SDK?
View 4 Replies View RelatedI have an android app where I am doing the following: Code...
View 3 Replies View RelatedGiven the following HTML: <p>This is text and this is an image <img src="http://www.example.com/image.jpg" />.</p> Is it possible to make the image render? When using this snippet: mContentText.setText(Html.fromHtml(text));, I get a cyan box with black borders, leading me to believe that a TextView has some idea of what an img tag is.
View 4 Replies View RelatedProblem: I have one app that let's you lock the device using Device Administration. One of my users had some conflicts with my app and another. He then removed Device Administration and uninstalled my app, rebooted his phone, and now he cannot access his phone.
He of course cannot use my app to change the password now (since it's uninstalled).
His phone is stock 2.2 LG Optimus V, Virgin Mobile, Rooted.
Question:I'm needing to find a way that my user can now change his lock code.
I need:
1.) to know an internal class (from com.android.internal) that I could use within an app to change the lock code (just like the system settings do).
2.) to know a command I can use with adb shell to remove or change the phone lock code.
3.) to know the location of the file that stores the lock code information.
When I first got the Desire, the inline controls controled the functions of the HTC and Android music players, (not 3cubed for example.) Since installing Doubletwist music player, the controls now control Doubletwist only..? So now if im using the HTC player and press the > controll to pause the song, it starts playing the last song I had open in Doubletwist over the top of the song I was listening to in the HTC app. and the only way to stop it is to use task manager to kill Doubletwist.
View 1 Replies View RelatedLoving my new Droid, but having a bit of a problem with the media playback. Once I get a track playing, and the screen is off, it is a major hassle when I want to simply pause for a second to talk to someone. I have to press button, swipe open, then press pause. The way I solved this on the iPod Touch was using the earbuds with the inline remote (even has a mic to use for calls in the iPhone). I am looking for a similar set up earbuds for the Droid, any suggestions?
View 15 Replies View Relatedperhaps a bit of a newbie question - but having some issues with inline pictures with the email application. I am on Gmail....and using the email application. When I go on the phone using the browser to gmail I can see the pictures, when using the email app I cannot. Two questions.
1. Is there a difference between the email app that comes with the phone and the Gmail app. I have a Gmail email address and no other email accounts.
2. Are there other apps that are better about inline images?
I am creating a layout through code and want to add a View to that layout. The view which is to be added is defined in the xml file. Is there any way to use an View from xml before calling setContentView method. Because we can not call findViewById before setContentView.
View 2 Replies View RelatedI have a main.xml as the main view and another alert_dialog_text_entry.xml for one dialog when a button is clicked in the main.xml view. In the click handler of the button, the findViewById () can't work, the returned vaule is null, the code is like this:
CODE:...........
The alert_dialog_text_entry.xml:
CODE:................
I develop an application. This don't use activity class. only use service class..
I need method(findviewbyid). but service don't have this method.