Android LinearLayout ImageView Top Placement

When practicing Android, want to put a picture in LinearLayout, make its picture pinned, the expected effect is this:

　　

But after the XML code ImageView is written like this,

            <imageview                android:layout_width= "match_parent"                android:layout_height= "wrap_content"                android:src = "@drawable/moegirl_help"                />

And the effect is like this.

Try to thank the method, including change to relativelayout layout, adjust layout_grativity and so on, until you think of ScaleType this method:

            <imageview                android:layout_width= "match_parent"                android:layout_height= "wrap_content"                android:src = "@drawable/moegirl_help"                android:scaletype= "Fitstart"                />

ScaleType property value is Fitstart, the picture is top-aligned;

ScaleType property value is Fitend, the picture is bottom-aligned;

ScaleType property value is Fitxy, the picture is stretched full screen.

Android LinearLayout ImageView Top Placement