ImageView in android xml layout with layout_height = "wrap_content" indented top and bottom

Question

I have a vertical LinearLayout containing an ImageView and several other layouts and views.

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:layout_width="match_parent" android:layout_height="wrap_content" android:contentDescription="@string/banner_alt" android:src="@drawable/banner_portrait" /> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/main_search" android:gravity="center" android:textStyle="bold" /> <LinearLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" > <Spinner android:id="@+id/search_city_spinner" android:layout_width="0px" android:layout_height="wrap_content" android:layout_weight="1" android:prompt="@string/search_city_prompt" android:entries="@array/search_city_array" /> <Spinner android:id="@+id/search_area_spinner" android:layout_width="0px" android:layout_height="wrap_content" android:layout_weight="1" android:prompt="@string/search_area_prompt" android:entries="@array/search_area_array" /> </LinearLayout> <LinearLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" > <Spinner android:id="@+id/search_rooms_spinner" android:layout_width="0px" android:layout_height="wrap_content" android:layout_weight="1" android:prompt="@string/search_rooms_prompt" android:entries="@array/search_rooms_array" /> <Spinner android:id="@+id/search_min_spinner" android:layout_width="0px" android:layout_height="wrap_content" android:layout_weight="1" android:prompt="@string/search_min_prompt" android:entries="@array/search_min_array" /> <Spinner android:id="@+id/search_max_spinner" android:layout_width="0px" android:layout_height="wrap_content" android:layout_weight="1" android:prompt="@string/search_max_prompt" android:entries="@array/search_max_array" /> </LinearLayout> <Button android:id="@+id/saearch_button" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/search_button" android:onClick="searchButton" /> </LinearLayout> 

My problem is that when displaying activity, ImageView has a registration at the top and bottom. I have confirmed that this is an ImageView (by setting the background color in the ImageView).

Image is 450x450 pixels. Setting the height manually to 450 pixels creates the desired effect (no indentation), and setting it to 450 dp produces the same effect as when using wrap_content.

It seems that android takes up the image height (450 pixels) and sets the ImageView height to the same value, but in dp.

Any ideas on what I can do to fix this? I do not want to use absolute values, as I will provide different images for different screen densities.

Answer 1

I had a simulated problem and resolved it with android:adjustViewBounds="true" in ImageView.

 <ImageView android:layout_width="fill_parent" android:layout_height="wrap_content" android:adjustViewBounds="true" android:contentDescription="@string/banner_alt" android:src="@drawable/banner_portrait" />