How to inflate RelativeLayout from XML
12,038
Solution 1
You need to inflate a layout before initializing views.
convertView = mInflater.inflate(R.layout.yourlayout, parent, false);
In the constructor initialize mInflater
LayoutInflater mInflater; //declare
Then in constructor
mInflater = LayoutInflater.from(context); // context pass to the constructor of adapter
Solution 2
try this:
RelativeLayout itemLayout = (RelativeLayout) LayoutInflater.from(mContext).inflate(
R.layout.todo_item, parent, false);
Solution 3
I assume you are writing custom adapter:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View itemLayout;
if (convertView == null) {
itemLayout = inflater.inflate(R.layout.fragment_active_orders_item, parent, false);
} else {
itemLayout = convertView;
}
//do what you want with itemLayout;
return itemLayout;
}
Declare LayoutInflater inflater
and intialize inflater
in your adapter like inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
Author by
Mabjik
Updated on June 04, 2022Comments
-
Mabjik almost 2 years
I got a very specific task to inflate view. To be honest i dont really understand what I should do exactly. The only method, which compiled probperly was that
@Override public View getView(int position, View convertView, ViewGroup parent) { //TODO - Get the current ToDoItem final ToDoItem toDoItem = mItems.get(position); //TODO - Inflate the View for this ToDoItem // from todo_item.xml. RelativeLayout itemLayout = (RelativeLayout)convertView.findViewById(R.id.RelativeLayout1);``
But now I got null pointer. So how should I properly inflate it? XML code below.
02-21 09:21:11.260: E/AndroidRuntime(1506): FATAL EXCEPTION: main 02-21 09:21:11.260: E/AndroidRuntime(1506): java.lang.NullPointerException 02-21 09:21:11.260: E/AndroidRuntime(1506): at course.labs.todomanager.ToDoListAdapter.getView(ToDoListAdapter.java:93) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.widget.HeaderViewListAdapter.getView(HeaderViewListAdapter.java:220) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.widget.AbsListView.obtainView(AbsListView.java:2177) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.widget.ListView.makeAndAddView(ListView.java:1840) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.widget.ListView.fillSpecific(ListView.java:1321) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.widget.ListView.layoutChildren(ListView.java:1633) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.widget.AbsListView.onLayout(AbsListView.java:2012) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.View.layout(View.java:14289) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.ViewGroup.layout(ViewGroup.java:4562) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.View.layout(View.java:14289) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.ViewGroup.layout(ViewGroup.java:4562) 02-21 09:21:11.260: E/AndroidRuntime(1506): at com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:349) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.View.layout(View.java:14289) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.ViewGroup.layout(ViewGroup.java:4562) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.View.layout(View.java:14289) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.ViewGroup.layout(ViewGroup.java:4562) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1976) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1730) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.Choreographer.doCallbacks(Choreographer.java:562) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.Choreographer.doFrame(Choreographer.java:532) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.os.Handler.handleCallback(Handler.java:730) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.os.Handler.dispatchMessage(Handler.java:92) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.os.Looper.loop(Looper.java:137) 02-21 09:21:11.260: E/AndroidRuntime(1506): at android.app.ActivityThread.main(ActivityThread.java:5103) 02-21 09:21:11.260: E/AndroidRuntime(1506): at java.lang.reflect.Method.invokeNative(Native Method) 02-21 09:21:11.260: E/AndroidRuntime(1506): at java.lang.reflect.Method.invoke(Method.java:525) 02-21 09:21:11.260: E/AndroidRuntime(1506): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 02-21 09:21:11.260: E/AndroidRuntime(1506): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 02-21 09:21:11.260: E/AndroidRuntime(1506): at dalvik.system.NativeStart.main(Native Method) <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/RelativeLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/titleView" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:textAppearance="?android:attr/textAppearanceLarge" > </TextView> <TextView android:id="@+id/StatusLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/statusCheckBox" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginTop="17dp" android:text="@string/done_string" > </TextView> <CheckBox android:id="@+id/statusCheckBox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_marginTop="52dp" android:layout_toRightOf="@+id/StatusLabel" > </CheckBox> <TextView android:id="@+id/PriorityLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/statusCheckBox" android:layout_alignTop="@+id/StatusLabel" android:layout_toLeftOf="@+id/priorityView" android:text="@string/priority_string" > </TextView> <TextView android:id="@+id/priorityView" android:layout_width="50dip" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/statusCheckBox" android:layout_alignParentRight="true" android:layout_alignTop="@+id/StatusLabel" > </TextView> <TextView android:id="@+id/DateLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/statusCheckBox" android:text="@string/date_string" > </TextView> <TextView android:id="@+id/dateView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/DateLabel" android:layout_toRightOf="@+id/DateLabel" > </TextView> </RelativeLayout>