I am attempting to set variable left margins for items in my ListView. The problem occurs in my custom Adapter in the getView method:
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null){
Comment c = comments.get(position);
convertView = inflater.inflate(R.layout.list_item, null);
(TextView)convertView.findViewById(R.id.story)).setText(c.message);
}
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT);
lp.setMargins(0, c.getDepth() * 5, 0, 0);
convertView.setLayoutParams(lp);
return convertView;
}
We inflate the list_item layout which is a RelativeLayout with some textViews inside. I then attempt to set the margins using a RelativeLayout.LayoutParams. I get a class cast exception on this, but the normal LayoutParams type has no method for setting the margins.
What is the best way to go about setting the margin?
Here is the error
java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams
at android.widget.ListView.setupChild(ListView.java:1779)
at android.widget.ListView.makeAndAddView(ListView.java:1748)
at android.widget.ListView.fillDown(ListView.java:670)
at android.widget.ListView.fillFromTop(ListView.java:727)
at android.widget.ListView.layoutChildren(ListView.java:1598)
at android.widget.AbsListView.onLayout(AbsListView.java:1273)
at android.view.View.layout(View.java:7192)
at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
at android.view.View.layout(View.java:7192)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1254)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1130)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1047)
at android.view.View.layout(View.java:7192)
at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
at android.view.View.layout(View.java:7192)
at android.view.ViewRoot.performTraversals(ViewRoot.java:1145)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1865)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3835)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
at dalvik.system.NativeStart.main(Native Method)