I already have one xml file called my_times.xml.
It contains views like, TextView, EditText, Spinner and ImageView.
Also I am using one web-service, which tells me the order of these views.
For Example, for one of my form field, say FirstName is appearing in the order 1, so this view will come in the first place of my form. If admin on the server changes this order to 2, then FirstName will come on the screen at second position and so on.
Is there any way to rearrange/reorder the existing xml layout, without disturbing the existing
xml layout.
My sample my_times.xml looks something like this:
<LinearLayout>
<TextView.../>
<EditText..../>
<TextView.../>
<Spinner.../>
</LinearLayout>
Please suggest me the ideal way to rearrange these existing views.
There are about 4 to 5 such screens which contains the form like fields that I want to rearrange/reorder dynamically based on the web=service response..
I didn't actually guess it but appears like a blink in my mind and tried the following solution and it worked...!
As I told earlier that my Web-Service was giving me the order of those form fields.
I made one method, which is returning me the order exactly like its on server.
Using this method I simply used the following two methods to re-order my views :
private void removeExistingViewsFromXML(){
lnrTimesContainer.removeView(tv1);
lnrTimesContainer.removeView(edt1);
lnrTimesContainer.removeView(tv2);
lnrTimesContainer.removeView(spn1);
}
And after getting the order and depending on the condition, I used the method :
lnrTimesContainer.addView(tv2);
lnrTimesContainer.addView(spn1);
Thats it...! :-)
Related
What I have created till now is as follows:
Please see this image
Purchase Screen
As shown in the image above, the screen (PurchaseActivity) initially has:
1. spinner for customer - line 1
2. fragement containing spinner for product, rate, and a delete fab - line 2
3. linear layout for displaying fragments same as above. They will be dynamically added.- line 3
4. fabAdder, adds fragment dynamically - line 4
5. save button for saving to persistent layer. line - 5
To add views dynamically, is this the right way. If so, how do I get the values out of the views inside fragment which are dynamically added in my activity.
Otherwise what is the right way of handling/providing the user with controls to add data dynamically.
Advantages of using this method:
The user will be able to add as much product as he wants, he may delete it conveniently and also editing is easy.
Please use the comments section to if you feel the question needs more content.
Answer or lead me in right path to fulfill this requirement.
-Newbie Androider
You can make outside class similar to POJO for handling values from fragment simultaneously. Something like this answer of mine for some other question: https://stackoverflow.com/a/44051019/5577679
Otherwise, why don't you make good old POJO for values?
I am trying to create a fragment and inside that i want to create multiple textviews whoose text is set from the data retreived from the database(mysql).
And also i want to have the feature "refresh" by which the textviews are updated with recent data from the database.Iam trying to do that but iam not getting enough idea how to do it as iam new to android programming.
Please help me with this. thank you in advance and any suggestions are acceptable.
i.e
I have database of a person and i want to get his name and address from that,then in my activity i want to create a fragment that displays a name and address in separate textboxes and if address or name exceeds some length then i can press "more" to see left information
Consider using a ListView to populate data from the database, and a SwiperRefreshLayout to refresh it. Check these links for more info :
SwipeRefreshLayout
ListViews
The answer depends on what your app will do.
If you have a fixed number of TextViews, and the number won't change in the future or depending on the answer to the database query, you could simply stick to normal TextViews; if the number changes, I suggest using ListViews or ExpandableListViews.
Regarding the layout, you can create a normal layout using AndroidStudio's layout designer, and then inflate it to your view.
For the refresh, you can add a button that calls the method in which you fill the textviews/listviews.
Actually your question is too broad: if you want a more specific answer, you should edit it asking what you really need.
I am new to android programming am trying to learn it.
So basically there are two ways of creating whatever is going to be visible on the screen :-
We create views and view group objects inside layout.xml files. And then as the need be we access those views that are already existing
in the layout through our java programs by accessing their ids ( as
r.java….). So basically when we start a particular activity, we
set the content to be displayed corresponding to that activity using
setContentView method, to which we pass the layout.xml file, inside
which we have defined the different views and view groups to be
displayed on the screen.
The second way is we create these views dynamically though our java programs and then set them as the content on the screen using
setContentView again.
Now the above is my basic understanding. Please let me know if the above needs correction.
Now what I want to understand here is :-
Is there a way that using the first method itself, we can do the
vice-versa, as in say instead of fetching the the views through their
ids from the layout.xml files, can we already have a predefined
layout.xml file with different views having ids, and now through our
java programs can we just access those views though their ids and set
their values, something like say (in javascript) :-
document.getElementById(“someTextBoxId”).value= “some calculated
value from java code here”
Thanks.
Let's say i have the Android XML file home_page.xml.
on this home_page.xml i have some variations that i want to show at different activities, and i'd like to reuse the same main layout home_page.xml.
For example, imagine variations on the page such as:
there's 2 more buttons if the user is in state A
there's 1 more editText field if the user is in state B (same activity as state A)
there's a different arrangement of layout on the Z-axis in a frame layout if the user is in state C (same activity as state A)
i know it's possible to programmatically say hide views and set views as visible. but is there a better way to do this via xml or something?
Android recommends using 2 Tags for re-using the layouts across different screens.
Include
When to Use ?
If you already know the layout that you want to re-use, create a new XML file and define the layout. Use tag to re-use it.
Merge
When to Use ?
To eliminate redundant view groups in your view hierarchy when including one layout within another, we can use tag.
Refer to this link - http://developer.android.com/training/improving-layouts/reusing-layouts.html for code sample and more details.
You can hide views but using the Visibility flag.
View v = findViewById(R.Id.my_view);
v.setVisiblity(View.GONE); //etc.
I've tried stuff like this before. I had mixed results. This is fine if you are doing things, like asking the user for a name, then showing an address input or something. But if you find yourself with like 3 or 4 conditions for one editText and then different ones for a button in the same class you might want to just use different layouts. A lot easier to manage.
I want to create a UI as shown in the below link:
http://i53.tinypic.com/sxksx5.jpg
According to me there can be the following approaches to do it.
There are two tables in this image. The above table should be made in the following way:
One row with two textview in one xml file. Now Inflate this UI using LayoutInflater. Draw It using a loop and set the text according to requirement.
The below table should be made in the following way:
How to make a dynamic table layout using XML
see the above link where It is advised that the 2nd table should be made using the listview.
Now I am confused that this can be made using gridvew, tablelayout, listview. Which one I should prefer and why? In my previous projects I have made this kind of UI almost in the coding. But I believe that a little change in the UI will require lot of change in the code. So I want to make the current UI using the xml. But dont know what approach would be best.
I'd suggest using a ListView. Subclass it and overload the getItem() method to render each column of the table row. You can then easily bind the listview to your data sources. you'll need to create an XML layout resource to describe a row of the table.
To show one table above another, put the listviews inside a RelativeLayout and specify attributes to position them relative to each other.
http://developer.android.com/reference/android/widget/ListView.html
http://developer.android.com/resources/tutorials/views/hello-relativelayout.html