How to inflate one view with a layout

问题:

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.

回答1:

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);

回答2:

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);

回答3:

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.

回答4:

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.

回答5:

Even simpler way is to use

View child = View.inflate(context, R.layout.child, null)
item.addChild(child) //attach to your item

回答6:

layout inflation

View view = null;
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
view = inflater.inflate(R.layout.mylayout, null);
main.addView(view);

回答7:

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)

回答8:

Check this Link. It has the answer-> https://possiblemobile.com/2013/05/layout-inflation-as-intended/

回答9:

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.

回答10:

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.!

回答11:

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();

回答12:

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);

回答13:

With Kotlin, you can use:

val content = LayoutInflater.from(context).inflate(R.layout.[custom_layout_name], null)

[your_main_layout].apply {
    //..
    addView(content)
}

回答14:

Try this code :

1. 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);   

1. 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.

回答15:

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);