the problems is, that I wan't to make ListView with elements which are containing image, description and two buttons. I'm making them in my own BaseAdapter extension, but fragment which is containing ListView is closing (wihtout errors in logcat..). I've found, that ListView is working well, when I'm not returning layout-type elements. So there is my sample with 'sample linear layout', which is not working.. Is there any possibility, to show layouts in ListView?
Here is my code:
Creating part:
lv = (ListView) getView().findViewById(R.id.main_wall_ambajes_lv);
AmbajAdapter aa = new AmbajAdapter(getActivity().getApplicationContext(), StaticData.ambajes);
lv.setAdapter(aa);
My getView method from adapter:
public View getView(int position, View convertView, ViewGroup parent) {
LinearLayout ll = new LinearLayout(getActivity());
ll.setOrientation(LinearLayout.VERTICAL);
ImageView iv = new ImageView(getActivity());
iv.setImageBitmap(placeholderBitmap);
ll.addView(iv);
ll.addView(iv);
ll.addView(iv);
ll.addView(iv);
return ll;
}
I don't know why you don't have any error however I don't think you proceed the correct way.
Usually you create the layout in the xml file of the layout folder and only inflate it in the getView(), for example as follow :
private LayoutInflater mInflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
#Override
public View getView(int position, View view, ViewGroup parent) {
if (view == null) {
view = mInflater.inflate(R.layout.your_custom_layout, parent, false);
}
//your code for setting the image or other things goes here
//for example if you have a textView
TextView textView = (TextView) view.findViewById(R.id.my_textview_id);
textView.setText("my custom text for this cell");
return (view);
}
and your_custom_layout is simply the xml file of your layout.
Note that for performance reason due to cell recycling I only inflate the view when it is null and I only read once the LayoutInflater context and put it in mInflater. However for the best performance you should use a ViewHolder, but it is out of the scope of your question.
I need to change the text color of all buttons in a view programmatically.
Right now I'm modifying them one by one like this:
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View view = inflater.inflate(R.layout.fragment_screen_dialer, container, false);
Button b = (Button) view.findViewById(R.id.button0);
b.setTextColor(value);
b = (Button) view.findViewById(R.id.button1);
b.setTextColor(value);
But since there are a lot of buttons I want to modify them all at once? How can this be done?
Iterate through all children of your layout, checking if next view is instance of Button or its subclass:
ViewGroup viewgroup = (ViewGroup) findViewById(R.id.your_layout);
int count = viewgroup.getChildCount();
for (int i=0; i < count; i++){
View view = viewgroup.getChildAt(i);
if (view instanceof Button){
(Button)view.setTextColor(value);
}
}
This will work if your buttons lays on the same level. Otherwise you need to build a recurrent function similar to this:
public void setNewColor(View view, int value){
if (view instanceof Button){
((Button) view).setTextColor(value);
}
else if (view instanceof ViewGroup){
ViewGroup viewgroup = (ViewGroup)view;
int count = viewgroup.getChildCount();
for (int i=0; i < count; i++){
View viewNext = viewgroup.getChildAt(i);
setNewColor(viewNext, value);
}
}
}
and apply it to your layout:
setNewColor(findViewById(R.id.your_layout), your_color);
AFAIK, you can't modify the color or other property of layout elements in a view at once. You have to do how you are doing, i.e. set the color one by one.
However, you can create a button style in style.xml and assign the syle to all buttons and whenever you will change style.xml it will effect all the buttons
You may have to iterate over all the views, and change colors of the buttons. Check this page for how to traverse all child view / view groups of your layout, including views (button) that are not direct children of your main layout
Including the two classes provided, you will write easy code like:
ViewGroup root = (ViewGroup) findViewById(android.R.id.content);
List<Button> buttons = Views.find(root, Button.class);
for (Button b: buttons)
b.setTextColor(value);
I created the Layout design using java code only not from the XML Layout Designs. The code I used is following
public View getView(int position, View convertView, ViewGroup parent) {
TextView tv = new TextView(mContext);
tv.setText(hotelList.get(position).name);
return tv;
}
How to use layoutInflator for creating layout fro this. I need 2 more textviews in a single list item. the whole list contains 10 different list items
Please provide some codes for this. Help appreciated
I have gone through this before by having my static class too. Check this out, it will help:
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView = convertView;
if ( rowView == null) {
LayoutInflater inflator = this._activity.getLayoutInflater();
rowView = inflator.inflate(R.layout.todolistlisting, null);
TodoListViewHolder viewHolder = new TodoListViewHolder();
viewHolder._name = (TextView) rowView.findViewById(R.id.tVTLName);
viewHolder._completed = (TextView) rowView.findViewById(R.id.tVTLCCount);
viewHolder._remaining = (TextView) rowView.findViewById(R.id.tVTLRCount);
rowView.setTag(viewHolder);
}
TodoListViewHolder holder = (TodoListViewHolder) rowView.getTag();
VO_TodoList votodolist = this._items.get(position);
holder._name.setText(votodolist._title);
holder._completed.setText(votodolist._completed);
holder._remaining.setText(votodolist._remaining);
return rowView;
}
TodoListViewHolder is my view component holder here. like your TextView.
I guess you know how to make XML layout for this layout. So just make the XML layout and get the object of the main layout using the following code:
LinearLayout mainLayout=(LinearLayout) View.inflate(R.layout.yourlayout); //if yourlayout.xml is the name of the xml file you made and put in the layout folder.
To get the child of the layout, let's say if it's a TextView with the id text, then the code would be:
TextView textView=(TextView)mainLayout.findViewById(R.id.text);
You can add view at runtime by using inflater like this
LinerLayout linearLayout = (LinearLayout)inflater.inflate(R.layout.news_categories_item, null);
TextView categoryValueTextView = (TextView)linearLayout.findViewById(R.id.news_category_item_value);
mMainLinearLayout.addView(categoryValueTextView);
Here i am inflating one text view which is there in another linear layout(this is simple linear layout which holds only textview) at runtime and adding it to my main linear layout.
you can get the inflater object in your acitivity by using getLayoutInflater(). And if you want to get inflater in adapter you have to pass inflater object to constructor of adapter from your activity.
I have the same View inflated (from XML) multiple times. When I call findViewById(R.id.my_layout).setVisibility(View.GONE) I want to apply it on all such views.
How do I do that?
There isn't a version of findViewById() that returns all matches; it just returns the first one. You have a few options:
Give them different ids so that you can find them all.
When you inflate them, store the reference in an ArrayList, like this:
ArrayList<View> mViews = new ArrayList<View>();
Then when you inflate:
LayoutInflater inflater = getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mViews.add(inflater.inflate(R.layout.your_layout, root));
Then when you want to hide them:
for (View v : mViews) { v.setVisibility(View.GONE); }
Depending on what you're doing with these Views, the parent layout may have a way of accessing them. E.g., if you're putting them in a ListView or some such. If you know the parent element you can iterate through the children:
ViewGroup parent = getParentSomehow();
for (int i = 0; i < parent.getChildCount(); ++i) {
View v = parent.getChildAt(i);
if (v.getId() == R.id.my_layout) {
v.setVisibility(View.GONE);
}
}
If the above options don't work for you, please elaborate on why you're doing this.
Modify on the View that holds the inflated layout.
E.g:
If you have
View v = inflater.inflate(.... );
you change the visibility onto this view. v.setVisibility(View.GONE);
I have a layout defined in XML. It contains also:
<RelativeLayout
android:id="#+id/item"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
I would like to inflate this RelativeView with other XML layout file. I may use different layouts depending on a situation. How should I do it? I was trying different variations of
RelativeLayout item = (RelativeLayout) findViewById(R.id.item);
item.inflate(...)
But none of them worked fine.
I'm not sure I have followed your question- are you trying to attach a child view to the RelativeLayout? If so you want to do something along the lines of:
RelativeLayout item = (RelativeLayout)findViewById(R.id.item);
View child = getLayoutInflater().inflate(R.layout.child, null);
item.addView(child);
You inflate an XML resource. See the LayoutInflater doc .
If your layout is in a mylayout.xml, you would do something like:
View view;
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.mylayout, null);
RelativeLayout item = (RelativeLayout) view.findViewById(R.id.item);
Though late answer,
but would like to add that one way to get this
LayoutInflater layoutInflater = (LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.mylayout, item );
where item is the parent layout where you want to add a child layout.
It's helpful to add to this, even though it's an old post, that if the child view that is being inflated from xml is to be added to a viewgroup layout, you need to call inflate with a clue of what type of viewgroup it is going to be added to. Like:
View child = getLayoutInflater().inflate(R.layout.child, item, false);
The inflate method is quite overloaded and describes this part of the usage in the docs. I had a problem where a single view inflated from xml wasn't aligning in the parent properly until I made this type of change.
Even simpler way is to use
View child = View.inflate(context, R.layout.child, null)
item.addChild(child) //attach to your item
Try this code :
If you just want to inflate your layout :
View view = LayoutInflater.from(context).inflate(R.layout.your_xml_layout,null); // Code for inflating xml layout
RelativeLayout item = view.findViewById(R.id.item);
If you want to inflate your layout in container(parent layout) :
LinearLayout parent = findViewById(R.id.container); //parent layout.
View view = LayoutInflater.from(context).inflate(R.layout.your_xml_layout,parent,false);
RelativeLayout item = view.findViewById(R.id.item); //initialize layout & By this you can also perform any event.
parent.addView(view); //adding your inflated layout in parent layout.
layout inflation
View view = null;
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.mylayout, null);
main.addView(view);
If you're not in an activity you can use the static from() method from the LayoutInflater class to get a LayoutInflater, or request the service from the context method getSystemService() too :
LayoutInflater i;
Context x; //Assuming here that x is a valid context, not null
i = (LayoutInflater) x.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
//OR
i = LayoutInflater.from(x);
(I know it's almost 4 years ago but still worth mentioning)
AttachToRoot Set to True
Just think we specified a button in an XML layout file with its layout width and layout height set to match_parent.
<Button xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/custom_button">
</Button>
On This Buttons Click Event We Can Set Following Code to Inflate Layout on This Activity.
LayoutInflater inflater = LayoutInflater.from(getContext());
inflater.inflate(R.layout.yourlayoutname, this);
Hope this solution works for you.!
If you want to add a single view multiple time then you have to use
layoutInflaterForButton = getActivity().getLayoutInflater();
for (int noOfButton = 0; noOfButton < 5; noOfButton++) {
FrameLayout btnView = (FrameLayout) layoutInflaterForButton.inflate(R.layout.poll_button, null);
btnContainer.addView(btnView);
}
If you do like
layoutInflaterForButton = getActivity().getLayoutInflater();
FrameLayout btnView = (FrameLayout) layoutInflaterForButton.inflate(R.layout.poll_button, null);
and
for (int noOfButton = 0; noOfButton < 5; noOfButton++) {
btnContainer.addView(btnView);
}
then it will throw exception of all ready added view.
If you are you trying to attach a child view to the RelativeLayout? you can do by following
RelativeLayout item = (RelativeLayout)findViewById(R.id.item);
View child = getLayoutInflater().inflate(R.layout.child, item, true);
I had the hardest time with this error, because of my unique circumstances, but finally found a solution.
My situation: I am using a separate view (XML) which holds a WebView, then opens in an AlertDialog when I click a button in my main activity view. But somehow or another the WebView belonged to the main activity view (probably because I pull the resource from here), so right before I assigned it to my AlertDialog (as a view), I had to get the parent of my WebView, put it into a ViewGroup, then remove all the views on that ViewGroup. This worked, and my error went away.
// set up Alert Dialog box
AlertDialog.Builder alert = new AlertDialog.Builder(this);
// inflate other xml where WebView is
LayoutInflater layoutInflater = (LayoutInflater)this.getSystemService
(Context.LAYOUT_INFLATER_SERVICE);
View v = layoutInflater.inflate(R.layout.your_webview_layout, null);
final WebView webView = (WebView) v.findViewById(R.id.your_webview_id);
// more code...
.... later on after I loaded my WebView ....
// first, remove the parent of WebView from it's old parent so can be assigned a new one.
ViewGroup vg = (ViewGroup) webView.getParent();
vg.removeAllViews();
// put WebView in Dialog box
alert.setView(webView);
alert.show();
With Kotlin, you can use:
val content = LayoutInflater.from(context).inflate(R.layout.[custom_layout_name], null)
[your_main_layout].apply {
//..
addView(content)
}
When add a layout to an Activity in Kotlin, see these steps:
Add just in Activity - One layout as a parent
Xml file of new
Layout Give the value of R.
val parent: LinearLayout =findViewById(R.id.stars)
val view =
LayoutInflater.from(applicationContext).inflate(R.layout.another, parent,false)
Where parent is not necessary, can be null But warning message will be appear
view.findViewById<ImageView>(R.id.ivTimer).setImageResource(R.drawable.t2)
Any view must be set value in this way, finally add
parent.apply { addView(view)}
I had used below snippet of code for this and it worked for me.
LinearLayout linearLayout = (LinearLayout)findViewById(R.id.item);
View child = getLayoutInflater().inflate(R.layout.child, null);
linearLayout.addView(child);