How to resize the pictures right?

Hy!

I have two pictures on the view and a button at the buttom.

XML:

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_height="wrap_content" android:layout_width="fill_parent" android:orientation="vertical">
    <TextView android:layout_height="wrap_content" android:id="@+id/mainscreen" android:layout_width="fill_parent" android:text="Selected Channel" android:gravity="center" android:layout_alignParentTop="true"></TextView>
    <ImageView android:id="@+id/ImageView01" android:layout_width="wrap_content" android:layout_height="wrap_content"></ImageView>
    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/mainscreen_state" android:layout_above="@+id/mainscreen_btchange"></TextView>
    <ImageView android:layout_width="wrap_content" android:layout_centerHorizontal="true" android:layout_height="wrap_content" android:id="@+id/ImageAd" android:layout_gravity="center" android:layout_below="@+id/mainscreen"></ImageView> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_height="fill_parent"
        android:layout_width="fill_parent">


    <Button android:layout_width="wra开发者_运维技巧p_content" 
        android:layout_height="wrap_content" 
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:id="@+id/mainscreen_btchange" 
        android:text="Change State"></Button>


    </RelativeLayout>
    </LinearLayout>

My Question: How to shrink the pictures that all elements of the layout are shown?

For more complicated layouts where I need to ensure a bunch of items can all be displayed, I usually start with a RelativeLayout as my outermost container. I dock whatever needs to be at the extremities with layout_alignParentTop and layout_alignParentBottom (in the case of vertical layouts, which yours seems to be), and then I work my in making the next set of elements relative to them. Basically, start at the edges and work your way in.

So, in your case, the Button should have the attribute android:layout_alignParentBottom="true", and the TV should have android:layout_above="@+id/mainscreen_btchange". The TextView at the top should have android:layout_alignParentTop="true" and the ImageView underneath it should have android:layout_below="@+id/mainscreen"