I have a ListView, its rows each have an image downloaded from the net in a separate thread. When the image is done downloading, I notify my main thread, and need to invalidate the corresponding row if it's on screen.
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I am new to Android. Can someone show to me how do I force invalidate a portion of an item in listview? I have listview row item that contains textview and image view. I only want to invalidate text in the textview of a particular item in the listview.
View 3 Replies View RelatedWhat's the functional difference between these list view methods: invalidate() and invalidate Views() ? Which one is faster to refresh a list view?
View 3 Replies View RelatedWhat is the use of Invalidate() in android?...
View 4 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...
The green plane is shown on the golden-brown surface but when I press a key nothing happens. I want eventually be able to move the plane pressing 4 different keys + another one for shooting but that's easy if I can just get the thing moving in the first place. When I press a key in the emulator, nothing happens at all.
CODE:............................
what parameters do I pass to this function? invalidate(left, top, right, bottom) for use with google map on android ?
View 1 Replies View RelatedI am new to Android development, just reading docs and trying the APIs. I am quit confused how ImageView managed to draw just a part of its content after an invalidate(Rect) invocation.
I've checked ImageView.java, found no other drawing method except onDraw(Canvas), but onDraw(Canvas) only cut the drawable only if it is beyound the view's visible boundary. I also read the implementation of View.invalidate(Rect), I think the key of this function is calling to mParent.invalidateChild(this, r);
However, I think the parent view doesn't know how to draw the child in the given Rect, it finally has to call some method of it child to paint out. Has anybody investigated this part of codes? Would you please give me some guide?
does rooting invalidate insurance on orange care?
View 5 Replies View RelatedI have a simple draw application on Canvas. User should be able to draw with a chosen color. On MotionEvent.ACTION_UP, invalidate() is called. Now it redraws previously drawn lines with the current color ( Redrawing the entire drawing with the current color). I do not want to change the color of previously drawn lines. I am not sure what is missing. Can I make it redraw only newly drawn lines?
View 4 Replies View RelatedI would like to change text and back ground color of my Listview without building custom rows. Is this possible ?
View 1 Replies View RelatedThere must be a way to do this. How can you tell a ListView that has a header to not scroll it when the user scrolls the contents? I want it to stay in a "stuck" position so that the user can always see what column the content applies to.
View 9 Replies View RelatedIn my project i m parsing xml and i want to put it in xml list with in list.
View 24 Replies View RelatedI have some class LoginActivity.java. In the onCreate method I retrieve ListView:
ListView list = (ListView)findViewById(R.id.snListView); then:
list.setAdapter(adapter);
In addition there are login.xml layout - there are:
<ListView
android:id="@+id/snListView"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
and sn_row.xml:
[Code]...
At the moment I have cell's height 100dp, I need that cell's height will depend on device, I mean I have here 5 cells showing at login screen in ListView and I need that these 5 rows will fit the ListView (cell's height = ListView's height/5).
I have a listview within an activity and at the bottom of the screen I have a scrollable gallery, my problem is making the listview clickable, I would normally use the listview position by doing if(position == 3) and then create the intent but postion is being used by my gallery. I listview is in the main.xml populated by an array.xml, can I add an id i.e android:id in the arrays.xml and create an intent with that, or can I create a listactivity and still use position to fire an intent if so how would I do this.
View 1 Replies View RelatedI am very new to Android, but I love it because it has given me back what i was longing for : Java.
but I am facing some doubts and confusions about is, since I am totally new to Mobile App Development:-
I am listing my queries here-
1.) I wish to put various items in a single element of a ListView. Like one image in the left, so many TextViews in a single element, and more things. Is it possible?
2.) I wish to give my text different colors, different sizes, and different fonts. how to do this?
3.) I wish to insert or delete elements from a List in ListView. How to do that?
4.) I wish to change the background color of my list. how to do this?
i can add to a db and list as a listview. When I click a list item using onListItemClick, what statement do I need to get the value? ........................
View 13 Replies View RelatedI am beginer to the anroid ,i am using the below code for displaying listview and i am not able to getting the onlistitemclick events for further ui's. package com.List;
import android.app.Activity; import android.app.AlertDialog; import android.app.ListActivity; import android.content.ContentUris; import android.content.DialogInterface; import android.content.Intent; import android.content.DialogInterface.OnClickListener; import android.database.Cursor; import android.database.DataSetObserver; import android.os.Bundle; import android.provider.Contacts.People; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.TextView; import............................
i want to implement listview with uses different xml layouts for rows depending on underlying item. A non optimal solution will be int getView method just to inflate every time a new view depending on the item from the adapter. Is there a better way to do this?
View 2 Replies View Relatedis it possible to let my ListView show 2 different rows? On the picture you can see at the top something like a "teaser", the other rows are normal ListView. The screenshot is from the iPod. With their framework it is possible to show 2 different row styles. I badly need this on Android... Otherwise I would use a tabel design. But adding rows dynamically would be such an overhead instead of using ListView SimpleAdapter addItem...
View 2 Replies View RelatedIs there a way to do groups in a listview? Like I have a list of certain states, each state has its own sublist. I'd sort of like to replicate the HTML optgroup/option setup where you have a parent group then child groups. Is there a way to do this built in or would I have to do something tricky with a custom view for Parent elements then switch the view back to the child element style.
View 3 Replies View RelatedI have a problem, I want a appwidget with a listview, but it seems that appwidget does not support this elment.so is there any way to reslove it?
View 2 Replies View Relatedhow to remove a row from a Listview? I have an Adapter that takes care of the List and when I try mAdapter.remove(Object) it does not remove the "Object" I passed but instead the last row on the list. I have tried different ways and it always ends up deleting the last row.
View 5 Replies View RelatedI have to add a gesture to my listview,i want to implement the same functionality of contact application.
when i left swipe it should send a message,right swipe it should call. can anyone help me how to do those gesture detection... i have implemented it in various other views... but i couldn't do for listView... i don't what going worng...
My code is:
CODE:...........
I have a listview that's populated by rows that get their data from a web server. It all works totally fine except I want to have a refresh button to re-download the data. I'm getting the data through an asynctask (getting the data in doinbackground) and then setting the listadapter in onpostexecute. All I do to run the asynctask which should take care of everything is run
new PopulateListTask().execute();
However, in my optionsSelect method, creating a new asynctask just like I did in oncreate doesn't do anything. It doesn't even enter doInBackground. I've tried using listView.invalidate() and listView.invalidateViews(). Is there some special way I'm supposed to repopulate a listview?
My only guess is that since I'm using a custom adapter, my getView method is creating some kind of error, but that wouldn't explain why it's not even entering my asynctask's doInBackground method. Thoughts?
Posting some code. This is a trimmed down version.
CODE:............
I'm getting this in my logcat when executing my asynctask the 2nd time. Any idea what it means? I tried googling to no avail.
I'm trying to make a layout that is something similar to how the android market is...where say under comments there is what appears to be a ListView but it does not scroll (the whole page scroll but not the comments). I'm not sure if its even a ListView but I want something that looks like the list view (ie. have those divider bars and what not but NOT SCROLLABLE). There are people suggesting to use a LinearLayout instead of a ListView but I also what the items to be clickable and open a new activity. Please help?
My current layout tree is like so
<LinearLayout>
<ScrollView>
<RelativeLayout>
I am looking to put content inside the RelativeLayout.
How i can use custom listview with textview and imageview.i tried following code
CODE:...............
But it is not working.
I have a listview with a bunch of items in it, each item has its own background, the problem is that if i only have one item in a list, the rest of the "empty" slots of the list is black. I tried applying a background around the listview and also on the view that sorrounds it (relativeView) and i get a strange margin around the whole list like the picture at the bottom. The question i have is, how can i remove the actual "borders" around the list so it still fills upp its parent ?
View 1 Replies View RelatedI try to write a xml like below xml,but always get an exception say that"Caused by: java.lang.UnsupportedOperationException: addView(View,LayoutParams) is not supported in Adapterview". It is say that in layout xml can not use <ListView> </ListView>,and it should be <ListView />and be manipulated using java code,is it? Code...
View 2 Replies View RelatedHow do I get a box appear in a different color listview practically the first field is the title.
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