Using a layout template ex: temp.xml I'm creating a new View with LayoutInflater and I add that View to my MainActivity layout:
inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
View newView = inflater.inflate(R.layout.temp, null, false);
mainActivLayout.addView(newView);
teml.xml has the following structure:
LinearLayout -> LinearLayout -> (two children) ImageView & TextView
How do I extract from the newView the ImageView and TextView elements so I can add Text and a Image to them ?
Do I have to TypeCast newView to Node or NodeList?
You can use findViewById() on the newView
TextView textView = newView.findViewById(R.id.my_textview_id);
ImageView imageView = newView.findViewById(R.id.my_imageview_id);
You need to set an ID for both the TextView and ImageView in the temp.xml and after that you can use newView.findViewById(VIEW_ID) to get the instance of the View.
I have a custom layout xml which i use as a template for creating items in a list dynamically. However I can't seem to change the text and color of elements within this custom layout properly before I add it to the main layout. I need to do this as each item in the list can be different.
If I have added more than one of these custom layouts to the main layout any changes I make to the TextView object always happen on the first item in the list.
My custom layout has a textview and a check box within a relative layout in a file called 'cat_panel.xml'.
My coding to produce the layout is:
LinearLayout rootEl = (LinearLayout) findViewById(R.id.pageWrapper);
LayoutInflater inflater = LayoutInflater.from(MainActivity.this);
View vw;
vw=inflater.inflate(R.layout.cat_panel, rootEl, false);
catTitleTv = (TextView) findViewById(R.id.catPanelTitle);
catTitleTv.setText("testing 1");
rootEl.addView(vw);
//the above is then repeated
vw=inflater.inflate(R.layout.cat_panel, rootEl, false);
catTitleTv = (TextView) findViewById(R.id.catPanelTitle);
catTitleTv.setText("testing 2");
rootEl.addView(vw);
Thanks in advance
Change
catTitleTv = (TextView) findViewById(R.id.catPanelTitle);
to
catTitleTv = (TextView) vw.findViewById(R.id.catPanelTitle);
I am inflating a layout in the viewpager of the current activity but I need to set the textview text of this layout so that I can inflate it and it displays the new text I am doing :
LayoutInflater inflater = (LayoutInflater) collection.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.mylayout, null);
TextView txt=(TextView)findViewById(R.id.content);
txt.setText(cursor.getString(cursor.getColumnIndex("Content")));
but that's getting me a nullpointerexception, how can I solve this how can I set the text of the textview of a layout that I am not in which mean from outside this layout..
Change - TextView txt=(TextView)findViewById(R.id.content);
to
TextView txt=(TextView)view.findViewById(R.id.content);
To find the textView you want you must specify the parentView
and so
TextView txt=(TextView)view.findViewById(R.id.content);
How can I inflate several same layouts with diffrent texts and images? I tried use this code
for (final Tour t : info.tours) {
final LinearLayout list = (LinearLayout) findViewById(R.id.tours_list);
Log.d(Const.LOG_TAG, "Add child view to tours_list");
final LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View child = inflater.inflate(R.layout.tour_item_for_guide_info,
list, true);
final ImageView tourImage = (ImageView) findViewById(R.id.tour_image);
final String tourImgUrl = Const.HOST + t.image;
imageLoader.DisplayImage(tourImgUrl, tourImage);
TextView tourText = (TextView) findViewById(R.id.text);
tourText.setText(t.name);
}
but text and image setted in first inflated layout, replacing the previous text and image. I understand what it's happens because layouts have same ids. Can I resolve it? I know about ListView and adapters, but I would like to learn if it might be done without them.
I assume that the ImageView and TextView - tourImage, tourText - are elements of R.layout.tour_item_for_guide_info.
If this is so, then when you reference it, you should use the child view to get them.
With other words, instead of:
ImageView tourImage = (ImageView) findViewById(R.id.tour_image);
TextView tourText = (TextView) findViewById(R.id.text);
You should have:
ImageView tourImage = (ImageView)child.findViewById(R.id.tour_image);
TextView tourText = (TextView)child.findViewById(R.id.text);
Not sure if this will definetly fix your problem, but it looks like a bug.
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);