ImageView displaying in layout but not on actual device

Question

I have an ImageView that I want to display matching the full width of the device, I realized that like this:

<ImageView     android:id="@+id/home_bar_newvault"     android:layout_width="wrap_content"     android:layout_height="40dp"     android:scaleType="centerCrop"     android:layout_alignParentBottom="true"     android:src="@drawable/home_bar" /> 

The home_bar is a PNG image file with the following dimensions: 2399x254. When I choose to view the Graphical Layout of the UI it displays the imageview correctly at the bottom of the activity. However, when I start the application on my device it won't display the Imageview at all.

Answer 1

I had the same issue, it is only showing in Design tab for Android Studio 2.2.

What I did to make it work is to change the automatic key assigned (populated via Drag/Drop ImageView) from app:srcCompat="@drawable/logo" to android:src="@drawable/logo" in Text tab to make it appear on both the emulator and the device e.g

<ImageView     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:src="@drawable/logo"     android:layout_alignParentTop="true"     android:layout_centerHorizontal="true"     android:layout_marginTop="75dp"     android:id="@+id/logoImageView"     android:scaleType="fitXY"     android:scaleX="1.5"     android:scaleY="1.5" />