<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

<Button android:id="@+id/btn"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
	android:text="调用相机拍照"
    />
<ImageView android:id="@+id/img"
   	android:layout_width="fill_parent"
   	android:layout_height="fill_parent"
   	/>
</LinearLayout>