Is it possible to clone a view. If no, how to support clone of a view in custom views. If yes.. which api should we use. clone method seems to be protected for view.
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I am developing a small app for Android. I am creating my own view.
I am planning to design the layout to be:
<LinearLayout>
<MyView>
<Button><Button>
</LinearLayout>
But when I run my program, my custom view will cover the whole screen. Is there anyway to avoid this?
I have already tried to add android:layout_width, layout_height to be wrap_content, fill_partent, but no luck.
I have a simple ListView and on that ListView I have placed a number of custom defined Views. The CustomView has ImageView and two TextViews.
The CustomView also has a "stateful drawable" as background, so that the background image (a 9-patch) changes if you press the Row in the ListView. When pressing the Row, the background image changes to a Red-ish thing.
The problem is that when the background changes from the default greyish, all the Views in the CustomView (ImageView and TextViews) still have their greyish background and thus creates very ugly greay boxes on top of the now redish background.
What is the best way to solve that problem? I hoped that such things were handled automatically (as it is done in for example .NET), but I was wrong it seems.
I like to know how can i clone a view object which is already there in the view hierarchy, so that it can be added to the same view hierarchy again.
View 1 Replies View RelatedMy question is almost exactly this question:
Clone textview to append it to a ViewGroup
However, I was inflating a view, and then attempting to clone it at the object level for performance reasons (I don't want to parse XML every single time), so that answer doesn't help me. View.clone() is protected and it apparently doesn't have a copy constructor. Is there any way to do this?
im having a problem getting a custom view that i created on the xml layout file. i have a class named DrawingLayout which extends FrameLayout. it is found in the package Drawing
as stated on this page http://developer.android.com/guide/topics/ui/custom-components.html i used the following decleration in xml
<Drawing.DrawingLayout ... />
but whenever i run the program with that decleration i get a runtime exception error on SetContentView( ... )
is there something im not doing well? If you need any more details please tell me because i cant seem to figure this one out.
Is it possible to nest one custom views within another Custom view?
View 13 Replies View RelatedI'm still trying to figure out how best to layer views on top of other views. I want to do something like the ZoomButtons on top of a custom view. I tried getting the ZoomButtonsController's parent and then adding views, but I didn't have enough control and they ended up on top of the buttons. I've gotten close by using a FrameLayout and some gravity on the top two views. But this has some interesting effects. Since this is contained with a tab, these two top views appear on top of all four of the tab pages. I want them on top of one of those pages only. Apparently, nested FrameLayouts don't mix well. What is the proper and expected way to do this? Here is more or less my complete layout....................
View 4 Replies View RelatedIs there a possibility to add a view or derivative (button, textview, imageview etc...) to another view without having to go through layouts?
I have a class called ScreenView, it derives from View (e.g. public class ScreenView extends View).
I wanted to display text into it, labels, images etc..
On an iPhone it's trivial, simply create my objects and use addSubview method ; you can embed any UI objects into another. Most UI toolkits work that way too.
Problem with layouts is that I haven't found an easy way to properly position a subview (say a text view) in a given location of the enclosing View. I want one to contain the other...
I was hoping I had missed something in the documentation (which is far from being intuitive that's for sure) and I could do something like myView.addView(subview). But it ain't so :)
As a side question, what is the closest to iPhone's UILabel in the Android world?
A UILabel can contain a text or a graphic. Right now I've been using TextView and ImageView but they aren't anywhere as flexible when it comes to layout as a UILabel
Edit: Making my View inherit from ViewGoup instead, let me add subview..
However, I want to draw in my view. I found that when ScreenView extends ViewGroup, the onDraw function is never called then.
Something like:
CODE:..........
Would paint in yellow my view if ScreenView extends View ; but not if it extends ViewGroup.
How do you draw directly in the view then?
*I have used three custom views... playpanel works fine.. but drawHeaderpanel does not workk..*
public class MainPanel extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);...................
Does anybody knows if (and how ) I can write a custom view/widget and then use it in resources in layout defintions?
View 5 Replies View RelatedI am parsing the url to display the contents in it, my requirement i have to display the each content in separate textviews.
For Instance: Let us assume the contents in that url are FootBall, Carom , chess, VolleyBall and so on . I want to display FootBall as a individual textview similarly others. so i cannot declare the textviews in xml what i usually do.
CODE:................
So i planned to create textview via java code
This is my parsing code which parse the url contents and store the result in a string array namely san_tagname; depending upon the length of this variable i want to create number of textviews.
CODE:..................
The reason for me to do this, I have created these 2 views in the beginning of the app. SO they are always present. But in some cases where i want only 1 view(which is surfaceview) and if i dont need the 2nd view(i.e, videoview), i am still getting a black patch at the palce where i have defned a videoview. want to get rid of this. Can anyone please tell me if it is possible to disable views/surfaces corresponding to them? If so how can we do this?
View 2 Replies View RelatedI am trying to figure out how to add a child view to a parent view so I can use the MotionEvent.ACTION_MOVE feature to move from one child view to the next. Is this possible?
View 4 Replies View RelatedI have made a Custom Component in XML, consisting of a button with an imageview stacked on top of it:
<myapp.widget.ClearableCaptionedButton
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:id="@+id/ccbutton_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical|left"
android:textAppearance="?android:attr/textAppearanceMedium"
android:background="@android:drawable/edit_text"/>
<ImageView
android:id="@+id/ccbutton_clear"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="5dip"
android:layout_alignRight="@id/ccbutton_button"
android:layout_alignTop="@id/ccbutton_button"
android:layout_alignBottom="@id/ccbutton_button"/>
</myapp.widget.ClearableCaptionedButton>
Extract of java source code:
public class ClearableCaptionedButton extends RelativeLayout implements OnClickListener {
...
public ClearableCaptionedButton(Context context, AttributeSet attrs) { super(context, attrs);
// some stuff that works fine
} ..
protected void onFinishInflate() { super.onFinishInflate();
mButton = (Button) findViewById(R.id.ccbutton_button);
mClear = (ImageView) findViewById(R.id.ccbutton_clear);
mButton.setText(""); // error here: mButton == null
}
My problem is similar to this one. When I try to find the views inside the custom compound, findViewById returns null. But, as you can see, i already added super(context, attrs); to the constructor. I am using the custom component directly in xml layout, like this:
<LinearLayout>
<!-- some stuff -->
<myapp.widget.ClearableCaptionedButton
android:layout_width="fill_parent"
android:layout_height="wrap_content"
app:caption="to"/>
</LinearLayout>
I created a custom SurfaceView called CaptureView and tried to add it into main.xml file.The application seems to work fine but if I switch from main.xml tab to Layout in Eclipse the text NullPointerException appears instead of layout preview.Does anyone know how this issue could be solved?
View 2 Replies View RelatedI have a set of custom views that I would like to add to a LinearLayout object. However, the first object I add to the layout (I do this dynamically, during runtime) has a OnMeasure method that tries to get as much space as possible resulting in that it get's all the space LinearLayout object. This is correct behavior, but when I then add more objects following that I want the allocated area for the first object to decrease so the others will fit. As it is now, each following object will get zero space, and hence won't be visible.
View 4 Replies View RelatedI 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 RelatedWhile researching how to create custom compound views in Android, I have come across this pattern a lot (example comes from the Jteam blog)I mostly understand how this is working, except for the part where inflate() is called. The documentation says that this method returns a View object, but in this example the author does not store the result anywhere. After inflation, how is the new View created fromt eh XML associated with this class? I thought about assigning it to "this", but that seems very wrong.
View 1 Replies View RelatedI have an List Activity with a Base Adapter where the contents have changed (example - the rows are reordered). I have tried invalidate.
Code...
Is it possible to add a view dynamically that overlaps other views in the layout. I have Linear Layout defined for the activity. As part of the Layout I have a custom View. The content changes dynamically and sizes appropriately based on the content size, with fill_parent for width and wrap_content for height. But what I want is, dynamically take over the full screen and then based on a click go back to the normal mode. Is there a mode to display a view where - in it can overlap all other views in the layout?
View 3 Replies View RelatedI'm looking for a way to iterate a viewgroup to retrieve all child views without calling findViewById(). Does view count and view position line up? So can I get the view count and then use that as a counter to call getChildAt(int index)?
View 2 Replies View RelatedI want to build my own custom view which should look like the Crysis-GUI.At first I designed a XML-based Layout and made it visible via the setContentView(int resid)-Method. Worked pretty well.But now I wan't to go a step further and draw in my Layout. So I created a new Class, let it extend View and overrode the onDraw()-Method. So far so good.But how can I still use my XML-Layout? I can't do setContentView anymore, so how could the same effect be achieved?
View 1 Replies View RelatedI was wondering if there is a way for placing a view to the right side of another view and centering it vertically on the second views height. In know this can be done using a LinearLayout, but for other reasons the 2 views must be part of the same RelativeLayout.
View 1 Replies View RelatedI have an activity defined as:
CODE:...................
I've successfully implemented onRetainNonConfigurationInstance() for my main activity to save and restore certain critical components across screen orientation changes.
But it seems, my custom views are being re-created from scratch when the orientation changes. This makes sense, although in my case it's inconvenient because the custom view in question is an X/Y plot and the plotted points are stored in the custom view.
Is there a crafty way to implement something similar to onRetainNonConfigurationInstance() for a custom view, or do I need to just implement methods in the custom view which allow me to get and set its "state"?
I have a custom view that works fine and I'm trying to get gestures into it. The most common technique I see is to add XML, such as this (from Android docs.Can someone point out my errors, suggest a better way that will allow me to get gesture callbacks and/or suggest diagnostic approaches?
View 1 Replies View RelatedI have table with 3 columns which is binded to an XML document with three text views.
CODE:........
Depending on the value store in the third column, I want to change the text color in R.id.c. How should, I go about with this.
This is what I have so far :
COD:...............
I am on Android 2.1 and I have one multi column Custom listview Using BaseAdapter with an editable edittext at the end of the listview. If the data in the listview do not contain the data of user choice then user should be able to enter data. If the data is already there in the list user will be able to select the data using custom selector. If a selection is made in the list view and user wanted to enter data in the text field at the bottom after selection then the marker in the list view should be unselected. I tried to use onclick() method on edit text using click listener. First time when it is clicked, edit text is getting focus and onclick() method is not fired. And when it is clicked second time, onclick() method is fired and notifyDataSetChanged() method is called. I tried to call the notifyDataSetChanged() method from the Focus Listener, list view selection is gone in my first attempt and edit text is not receiving any data input from the keyboard (frozen).
View 1 Replies View RelatedI've created a custom view in an SQLite database for an Android application. I'm using Sqliteman on Ubuntu to test my SQL statements before I put them in my app. I'm trying to do a simple select statement on my view. The select statement works fine in SQLiteman but when I put the same statement in my code it throws an error. The statement: select * from item_view where parent_item_id = 0;........
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