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POAbsListView LayoutParams Set Layout Gravity
 

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  1. POAbsListView LayoutParams Set Layout Gravity
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    <p>How can I set the layout gravity for AbsListView.LayoutParams?</p> <p>I am using this in a custom array adapter where I need to set the layout gravity based on a variable. My list child contains a linear layout root but in the adapter, I cannot set the LinearLayout params as i get the error that LinearLayout.LayoutParams cannot be cast to AbsListView.Layout params.</p> <p>So, I tried to set the layout_gravity for an AbsListView, but it has no option for a gravity.</p> <p>How can I set the layout_gravity programatically in this case?</p> <p>EDIT: (Added source code)</p> <p><strong>The Listview Parent</strong></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/messaging_background" android:orientation="vertical" android:padding="2dp" &gt; &lt;ListView android:id="@+id/messageThread" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_above="@+id/list_separator" android:layout_alignParentTop="true" android:layout_marginTop="5dp" android:cacheColorHint="#00000000" android:divider="@null" android:dividerHeight="2dp" android:fastScrollEnabled="false" android:listSelector="#00000000" android:transcriptMode="disabled" /&gt; &lt;View android:id="@+id/list_separator" android:layout_width="match_parent" android:layout_height="1.0dip" android:layout_above="@+id/footer" android:background="@android:color/white" /&gt; &lt;LinearLayout android:id="@+id/footer" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:orientation="horizontal" &gt; &lt;ImageButton android:id="@+id/filter" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="0.1" android:background="@null" android:contentDescription="@string/message_filter_button" android:scaleType="fitCenter" android:src="@drawable/filter" /&gt; &lt;EditText android:id="@+id/send_message_text" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="0.8" android:imeOptions="actionSend" android:inputType="textMultiLine" android:maxLines="6" android:scrollbarAlwaysDrawVerticalTrack="true" android:scrollbarDefaultDelayBeforeFade="200" android:scrollbarFadeDuration="300" android:scrollbarStyle="outsideOverlay" android:scrollbars="vertical" /&gt; &lt;ImageButton android:id="@+id/send" android:layout_width="0dip" android:layout_height="wrap_content" android:layout_gravity="center_vertical" android:layout_weight="0.1" android:background="@null" android:contentDescription="@string/send_message_button" android:scaleType="fitCenter" android:src="@drawable/send_btn" /&gt; &lt;/LinearLayout&gt; &lt;/RelativeLayout&gt; </code></pre> <p><strong>The Listview Child</strong></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="match_parent" android:background="@drawable/incoming" android:orientation="horizontal" &gt; &lt;TextView android:id="@+id/messaging_bubble_content" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:fontFamily="sans-serif-light" android:maxWidth="200dp" android:paddingLeft="10dp" android:paddingRight="10dp" android:textAppearance="?android:attr/textAppearanceMedium" android:textIsSelectable="true" /&gt; &lt;TextView android:id="@+id/messaging_bubble_time" android:layout_width="wrap_content" android:layout_height="match_parent" android:fontFamily="sans-serif-light" android:gravity="center" android:paddingRight="5dp" android:textAppearance="?android:attr/textAppearanceSmall" android:textIsSelectable="false" /&gt; &lt;ImageView android:id="@+id/messaging_bubble_megaphone" android:layout_width="20dp" android:layout_height="match_parent" android:contentDescription="@string/message_child_megaphone" android:src="@drawable/megaphone" android:visibility="gone" /&gt; &lt;/LinearLayout&gt; </code></pre> <p><strong>What should I call in the getView of my adapter to push the child to the right according to a variable in the adapter?</strong></p> <p><strong>EDIT 2:</strong></p> <p>A possible solution: Wrap the whole child under another element under the root and then you can set gravity instead of layout gravity which can be easily done using the <code>setGravity()</code> method.</p> <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" &gt; &lt;LinearLayout android:id="@+id/messaging_bubble_wrapper" android:layout_width="wrap_content" android:layout_height="match_parent" android:background="@drawable/incoming" android:orientation="vertical" tools:ignore="UselessParent" &gt; </code></pre> <p>The second linear layout is useless but having it gets the job done!</p>
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    1. COYou could wrap the existent row layout in another layout(`FrameLayout` for example) and then simply set the gravity on the `Linearlayout` from that `FrameLayout`. However if you're trying to make some sort of messaging list like rows I recommend that you create an adapter with two types of rows.
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    2. COThis is exactly what I ended up doing. Seems hacky but its the easiest solution i could find.
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    3. COIt's not that hacky because the `LayoutParams` for `AdapterViews` don't allow gravity(as the children are managed by the widget itself).
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