CODEWITHSUNDEEP
androidlistview
Blnpwr
Blnpwr

Reputation: 1875

Accessing .xml file from MainActivity class

We have MainActivity.class , activity_main.xml and firstlayout.xml.

In firstlayout.xml there is a listview. I am in MainActivity.class and I want to access my listview. How can I do that when my listview is in another .xml file.

Something like

ListView lstview = (ListView) findViewById(R.id.lstview)

does not work, because I get a

null reference error

because my listview is not in mainactivity.xml. I also tried

setcontentView(R.layout.firstlayout)

but it didn't work either. 

How can I access a xml file which is NOT in main_activity.xml ?

Upvotes: 1

Views: 1848

Answers (3)

Vikrant Shah
Vikrant Shah

Reputation: 547

There are 2 possible way for useing ListView in your mainActivity.

1) You can simply include that layout (firstlayout.xml) into you activity_main.xml file.

example:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/app_bg"
android:gravity="center_horizontal">

<include layout="@layout/firstlayout"/>

<TextView android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:text="@string/hello"
          android:padding="10dp" />

2) The second option is Layout Inflater.You can simply add other layout file directly into your java file.

 LayoutInflater inflater = LayoutInflater.from(getContext());
    inflater.inflate(R.layout.firstlayout, this);

Upvotes: 2

Veneet Reddy
Veneet Reddy

Reputation: 2927

You can inflate your own:

View firstLayout = getLayoutInflater().inflate(R.layout.firstlayout, null, false);
ListView listView = (ListView) firstLayout.findViewById(R.id.lstView);

Just ensure that firstlayout has a ListView with id lstview.

Upvotes: 1

regev avraham
regev avraham

Reputation: 1112

You can inflate the view with the layout inflater:

getLayoutInflater().inflate(R.layout.firstlayout,
                           parentView, //the view that logically contains the list view, or just the base view in the main layout
                           false // false if you want to attach the list view to the parent, true otherwise
                           );

Upvotes: 1

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