Adding Rule programatically to a View that is already in the layout - Android

Question

How do i add a rule to a View that is already in my layout?

My XML:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/relative_layout_id"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.mylifeinformationsharedsocial.SexAcivity" >
<ListView
    android:id="@+id/list_view_id"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />    

</RelativeLayout>

I want to add layoutParams.addRule(RelativeLayout.BELOW,myView.getId()); But if i add the View again to the layout it gives me an IllegalStateException(obviously Haha).

So how do i do that?

EDIT

Java:

listView = (ListView) findViewById(R.id.list_view_id);
listView.setAdapter(myArrayAdapter);

layoutParams.addRule(RelativeLayout.BELOW,datePicker.getId());
relativeLayout.addView(listView,layoutParams);

It throws the Exception at the addView() method

Don't use addView, but setLayoutParams. See [this post](http://stackoverflow.com/questions/10159372/android-view-layout-width-how-to-change-programmatically). — Matthias, Jul 21 '15 at 15:29

score 3 · Accepted Answer · edited May 23 '17 at 12:33

You can't add the view cause it's already added. So, you need to set the correct layout params. You can either create new ones or retrieve the current ones and alter those. Checkout this post.

layoutParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
layoutParams.addRule(RelativeLayout.BELOW,myView.getId());
listView.setLayoutParams(layoutParams);

God · Answer 2 · 2015-07-21T15:45:41.243

1

So as Matthias suggested:

layoutParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
layoutParams.addRule(RelativeLayout.BELOW,myView.getId());
listView.setLayoutParams(layoutParams);

edited Jul 21 '15 at 15:45

answered Jul 21 '15 at 15:18

God

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Adding Rule programatically to a View that is already in the layout - Android

2 Answers2