Android :: Android's Listview - Update View Within Of Cells Just After Invalidating Activity's View

May 15, 2010

I have ListViewActivity
public class SelectActivity extends ListActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.select_one_of);
SimpleAdapter adapter = new SimpleAdapter(
this,
createChildList(),
R.layout.select_one_of_childrow,
new String[] { KEY_VALUE },
new int[] { R.id.selectoneof_add_new_item});
setListAdapter(adapter);
}
// ...
}

after setListAdapter() calls I would like to execute the following code:

((TextView) getListView().getChildAt(0).findViewById(R.id.selectoneof_add_new_item)).setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ticked, 0); but getListView().getChildAt(xxx) returns null and I catch NullPointerException. Where should I put mentioned above code-snippet?

Android :: Android's listview - Update view within of cells just after invalidating Activity's view


Android :: Add A View / Activity On Top Of A ListView

Jun 2, 2010

I want to have a view with several choices when I click an element of my ListView. I was thinking of implementing an AlertDialog but as I need more than 3 options it is not possible. I also thought of putting my ListView in a FrameLayout and have an view with a gone visibility that I would turn visible at the click and update the content but I don't know If it's a good idea. Code...

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Android :: What ListActivity / ListView Provide Beyond A Regular Activity / View?

Aug 7, 2010

In Android, what functionality do ListActivity and ListView provide beyond a regular Activity and View?

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Android :: Can Update A List View In One Activity While Im In Another Activity

Oct 4, 2010

I currently have a tab layout with 2 tabs, one tab with a list view and one with the option make strings so I can add them in the list view. Both tabs have their own activity because this made the code much more structured, and I dont have to repeat my self later.

Lets say im in the tab that offer me to create an string, and i press the update list button, how do I update the list view without startActivity()? If i use startActivity(), it starts List.java, and instead of displaying the list in the list view tab, it takes full screen, which defies the purpose of the tab view. In other words, the startActivity() steals the focus from the tab view of the list, and sends it fulscreen.

I want to update the activity in my list view tab, without starting a new activity that goes to fullscreen, and doesnt update the one in the tab.

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Android : Setting A Layout To Use As Empty View For A ListView In Case Adapter Has Zero Items In A Activity

Nov 16, 2010

How to use a layout as empty view for a listview when the adapter has zero elements?

setEmptyView is not working with this code :

CODE:..............

Layouts used :

CODE:...........

main.xml

CODE:...............

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Create New Activity Or Update View Of Existing Activity?

Dec 24, 2012

I am working on developing an app and I am not sure when should I use a new activity and when should I update the existing view.

For example, lets say I have a view that shows a multiple choice question.Now, when the user selects his choices and clicks on say "Evaluate", I want to show the same question view but along with the right answers and explanations for each option. So does that mean, I should send an Intent upon a click on Evaluate or I should just update the view (i am not sure how)?

If I send an intent and show a new screen, how can the user go back to the next question without displaying the answers? If I don't create an new activity, how can I update the existing view that is already displayed?

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Android : How To Update A View Based On Another View?

May 4, 2009

If I have a View that I want updated at the same time another View updates itself. What is the correct way of doing this?

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Android :: Populate View Flipper Child View With List View?

Aug 2, 2010

I am trying to set up a ViewFlipper that changes a SlidingDrawers content each time a button is pressed. So far every view I set up worked fine, but now I am trying to create a ListView (including single_choice_mode) within a child view of the ViewFlipper, but my attempt only let to a NullPointerException. As I only discovered ViewFlipper today, I am not yet familiar with it and may not have understood it completely. if someone could give me a hand and help me find out what I have done wrong, that would be great. Here is what I have done:

The code for the onClick event of the ImageButtons:
public void onClick(View v){
if (v == btnExposure){
mFlipper.setDisplayedChild(0); }
else if (v == btnProperties){
mFlipper.setDisplayedChild(1);}
else if (v == btnSpecialEffects){
mFlipper.setDisplayedChild(2);.............

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Android :: View And ListView Scroll At Once?

Oct 22, 2009

What I have now is a layout that includes a list view at the bottom. All of the items in the layout above the list view remain fixed as you scroll through the list view. I would like the entire page to scroll so for example when you reached the bottom of the list you would no longer see the items above the list view.

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Android :: Specify View To Use When ListView Is Empty?

Feb 12, 2010

I can't find this in the docs - isn't there a way to specify a View to use for a ListView if the adapter is empty?

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Android :: Fill_parent With ListView Cells - Single TextView Span One To Two Lines

Feb 12, 2009

I am having this issue where I am trying to have a single TextView span one to two lines, fill the cell completely (so you can also click edges of the cell and it will trigger) and center-align.

This is the layout for the cell:

CODE:...

However cells seems to be filled correctly ONLY if it happens to wrap around and end up spanning two lines of text. It shows center-aligned and you can click anywhere in the cell to trigger the click. The cells that do not span multiple lines of text are left-aligned and trigger (highlight) only if you click where the text is. There is a "numb" area which does not react to clicks inside the cell if the text is short.

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Android :: Change View In ListView If Selected

May 13, 2009

I'd like to create my ListView and make it's Views be changed while selected (or, clicked). How could I do it?

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Android :: Header View Height In A ListView

Apr 7, 2010

Is it possible to control the height of a ListView's header view(s)? If I try containing my header view in a layout and set the height to say, 50 or 100, the height in the view seems to stay around 30.

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Android : How To Create A ListView With Different View/layout For Each Row

Oct 26, 2009

Just have a look in the system app contacts --->add new contact, this activity have a listview with different structured views for each row. I could do this by override the "getView" method, but a problem I'm facing is edittext will lose focus when I click on it. What happened when the view enter touch mode?

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Android :: How To Get Activity View Inside That Activity?

Nov 11, 2010

I want to show my next activity withing my previous activity layout "LinearLyout". But it is not working. Can any one help? I put my last activity layout reference to a global class in an static variable. My code...

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Android :: Show Progress View During ListView Is Loading

Dec 7, 2009

In the android market app, the ListView shows a 'ProgressView' during the loading of the content of the ListView, and then when the loading is done, it shows the content of the ListView.

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Android :: How To Detect Particular View Longclicked From Array Listview?

Feb 18, 2010

I have an array list of a view in my application. The view has both single click and long click listeners. To detect a particular view that is selected I'm using isPressed() for single click listener. Now how can I detect that a particular view is longclicked from the array list of view?

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Android :: Listview Not Scrolling Inside View Flipper

Nov 19, 2010

A view flipper has 4 list views. When i flip the view flipper using gesture listener implemented on view flipper, it works fine. But I am not able to scroll the list view since the touch event is not able to trickle down from view flipper to list view.

CODE:.............

I want this event to be handled by list view

CODE:.................

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Android :: Find Other (checkbox)view In A Custom Listview

Nov 18, 2010

I am new so I may not explain the situation well. Please let me know if you need more info.

I am trying to implement a listview like this:

[textview][button][checkbox]
[textview][button][checkbox]
[textview][button][checkbox]
[textview][button][checkbox]

I want other checkbox unchecked automatically when I click one of them. So it is like a single choice. I write following codes which can implement multiple choice but when I try to switch it to single choice I got trouble.

in checkBoxOnClickListener I cannot find other (checkbox)view and toggle them. Any suggestion pals? Let me know if you think my express skills poor. code...

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Android :: How Get The Possition Of View In ListView That Called OnCreateContextMenu

Jun 17, 2009

I have a ListView and to create context menu I need to know what view created the menu. The View parameter of onCreateContextMenu is always the same and equals the first view in ListView. Is there any way to get position or id of view that called onCreateContextMenu?

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Android : Layout - Listview Pushes View Outside Screen

Nov 14, 2010

I have two textviews, a listview (this is a listactivity, by the way) and a datepicker. All is supposed to be displayed in this order, vertically.

The problem is that the ListView is pushing the datepicker below the screen, to the depths of the unseen world. I want the datepicker to have its own space, fixed at the bottom, while the listview grows as needed, but still allowing datepicker to have its own space.

+/- like this:

~~~~~~~~~~~~~~~ screen top

TextView 1

TextView 2

|

|

|

| ListView [*]

|

|

|

DatePicker (stays here no matter how much List grows or shrinks

~~~~~~~~~~~~~~~ screen bottom

[*] -> This listview will scroll a lot, but won't hide datepicker!

I know it's very lazy to ask for ready code, but could you guys share a light? This is driving me crazy. I've tried millions of combinations I believe.

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Android :: Change Backround Of View Embedded In ListView Item

Oct 22, 2009

I have a ListView backed by customized ArrayAdapter where each item has 2 LinearLayouts - one I call head, and the other one - body. The body is hidden (gone) until user clicks on the row at which time it slides out. The second click (on the head) will hide the body. However if user clicks on the body it brings another activity. All of this works just fine, here comes the problem.When user presses on body I want a visual indication of the action just the same way as regular list item will flicker an orange background when pressed. I'm not getting this by default since (my theory) the onPress event is intercepted by body's view and not processed by the list item.The first thing I tried was to execute body.setBackground('#ff00ff') (never mind the color) in onPress event. That didn't work since (I suspect) there's no repainting after the call. Then I dig a little bit more and decided to use <selector/>-based background. I defined body_background.xml in drawable folder and assigned that to the body's background property.

There I noticed that background will only change if the even is processed by the list. For example if I set <item android:state_selected="true" android:drawable="@drawable/selected"/> then when I press on the head - the background of both elements (head and body) will change, however when I press on body - nothing. So to summarize my question.how do I change background of the child element in the list item if I assign custom onClick handler to it?

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Android :: Show Another View On Top Of Existing ListView After Checkbox Checked

Jul 1, 2010

Currently I have a list view within it each row has a checkbox attached. I would like that once any checkbox is checked, at the bottom of the screen a view displays, and once none of the checkboxes are checked, the view automatically disappeared. Possible to do this?

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Android : Can I Create ListView And Setting Background Color Of View In Each Row?

Apr 4, 2010

I am trying to implement a ListView that is composed of rows that contain a View on the left followed by a TextView to the right of that. I want to be able to change the background color of the first View based on it's position in the ListView. Below is what I have at this point but it doesn't seem to due anything. Code...

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Android :: ListView No Longer Responding To Select When Checkbox Added To Row View

Jun 10, 2010

I'm sure this is an obvious one but I'm at a loss. I'm using my own layout for list rows, all well and fine. but the moment I add a checkbox view to the rows layout only the checkbox responds to user selection. I'd like for the checkbox to change state if the user taps anywhere within a given row. (as with android prefs)

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Android :: Get Event Of List View Field When Adding Checkbox In Listview

Apr 21, 2010

i have problem to get event of list view field when i am adding checkbox in listview. my problem is to get the status of check box form every row of the list view, either it is check or not, according to that i have to do operation.

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Android :: List Item View Order Changes When Scrolling Fast In ListView

Sep 2, 2010

I am new to android, and ended up (have to) ask a question here. Let's make it simple, I simply want to make my own TextView-like (MyView extends View), This is my code:

public class MyView extends View { private Paint mPaint;
private String mText; private Bitmap mBitmap1; private Bitmap mBitmap2;
public MyView(Context context) { super(context); initView(); }
public MyView(Context context, AttributeSet attrs) { super(context, attrs);
initView(); } private final void initView() { mPaint = new Paint(); }
public void setText(String text) { mText = text; }
@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int measuredWidth = measureWidth(widthMeasureSpec);
if (mBitmap1 == null) initBitmap1(measuredWidth);
int measuredHeight = measureHeight(heightMeasureSpec);
setMeasuredDimension(measuredWidth, measuredHeight);
}

private void initBitmap1(int measuredWidth) {
mBitmap1 = Bitmap.createBitmap(measuredWidth, Fonts.getHeight(), Bitmap.Config.ARGB_4444);
Canvas canvas = new Canvas(mBitmap1 ); canvas.drawText(mText, 0, 0, mPaint);
} private void initBitmap2() {
mBitmap2 = Bitmap.createBitmap(30, Fonts.getHeight(), Bitmap.Config.ARGB_4444);
Canvas canvas = new Canvas(mBitmap2); canvas.drawText(mText, 0, 0, mPaint);
} private int measureWidth(int widthMeasureSpec) {
int measuredWidth = 0; int specWidthMode = MeasureSpec.getMode(widthMeasureSpec);
int specWidthSize = MeasureSpec.getSize(widthMeasureSpec);

if (specWidthMode == MeasureSpec.EXACTLY) { measuredWidth = specWidthSize;
} else { measuredWidth = getWidth(); if (specWidthMode == MeasureSpec.AT_MOST) {
measuredWidth = Math.min(measuredWidth, specWidthSize);
} } return measuredWidth; }
private int measureHeight(int heightMeasureSpec) {
int measuredHeight = 0; int specHeightMode = MeasureSpec.getMode(heightMeasureSpec);
int specHeightSize = MeasureSpec.getSize(heightMeasureSpec);
if (specHeightMode == MeasureSpec.EXACTLY) { measuredHeight = specHeightSize;
} else { measuredHeight = 80; if (specHeightMode == MeasureSpec.AT_MOST) {
measuredHeight = Math.min(measuredHeight, specHeightSize);
} } return measuredHeight;
} @Override protected void onDraw(Canvas canvas) {
super.onDraw(canvas); canvas.drawBitmap(mBitmap1, getLeft(), 0, mPaint);
initBitmap2(); canvas.drawBitmap(mBitmap2, getLeft(), 30, mPaint);
} }
In my code, I populate some numbers of MyView (let's say 20) in a ListActivity. My question is why mBitmap1's order changes randomly while i scroll (up-down) fastly (if I scroll slowly, this problem not occur)? mBitmap2 stays where those should be.

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Retrieve And Set ListView Items (cells) Height Depending On ListView Height

Apr 4, 2012

I 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).

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Android :: View Containing Reference To Its Activity

Oct 28, 2009

I have a custom view that needs a reference to the activity that created it.Dianne Hackborn said in another thread: >Give your view a reference to the activity (or a Java interface it implements) and call back through that. >Much much MUCH more efficient than sending a broadcast. >See all of the standard view and view subclass callbacks for examples.

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Android :: Way To Open Activity From View?

Oct 2, 2010

How to open activity from view.i am develop a game if game is over i need to move user to main menu activity.Please help me its very urgent to me.

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