1. <?xml version=“1.0” encoding=”utf-8″?>  
2. <ScrollView xmlns:android=“http://schemas.android.com/apk/res/android”  
3.     android:layout_width=“fill_parent”  
4.     android:layout_height=“wrap_content” >  
6.     <HorizontalScrollView  
7.         android:layout_width=“fill_parent”  
8.         android:layout_height=“wrap_content” >  
10.         <RelativeLayout  
11.             android:layout_width=“fill_parent”  
12.             android:layout_height=“fill_parent”>  
14.             <TextView  
15.                 android:id=“@+id/textview1”  
16.                 android:layout_width=“wrap_content”  
17.                 android:layout_height=“wrap_content”  
18.                 android:text=“Scrolling view”  
19.                 android:textSize=“30dp” />  
21.             <ImageView  
22.                 android:id=“@+id/imageview1”  
23.                 android:layout_width=“wrap_content”  
24.                 android:layout_height=“wrap_content”  
25.                 android:layout_toRightOf=“@id/textview1”  
26.                 android:src=“@drawable/item1” />  
28.             <TextView  
29.                 android:id=“@+id/textview2”  
30.                 android:layout_width=“wrap_content”  
31.                 android:layout_height=“wrap_content”  
32.                 android:layout_toRightOf=“@id/imageview1”  
33.                 android:text=“Vertical and horizontal scrolling”  
34.                 android:textSize=“30dp” />  
36.             <ImageView  
37.                 <span style=“color:#ff6666;”>android:id=”@+id/imageview2″  
38. </span>                android:layout_width=“wrap_content”  
39.                 android:layout_height=“wrap_content”  
40.                 android:layout_below=“@id/textview1”  
41.                 android:src=“@drawable/item2” />  
43.             <TextView  
44.                 android:id=“@+id/textview3”  
45.                 android:layout_width=“wrap_content”  
46.                 android:layout_height=“wrap_content”  
47.                 android:layout_below=“@id/imageview2”  
48.                 android:text=“Vertical and horizontal scrolling”  
49.                 android:textSize=“30dp” />  
51.             <ImageView  
52.                <span style=“color:#ff6666;”> android:id=”@+id/imageview2″</span>  
53.                 android:layout_width=“wrap_content”  
54.                 android:layout_height=“wrap_content”  
55.                 android:layout_below=“@id/textview3”  
56.                 android:src=“@drawable/item3” />  
57.         </RelativeLayout>  
58.     </HorizontalScrollView>  
60. </ScrollView>  

Such an exception broke out, java.lang.IllegalStateException: Circular dependencies cannot exist in RelativeLayout.

The reason is that duplicate view ID names are reproduced in the RelativeLayout layout, and imageview2, textview3, and imageview2 have circular dependencies.

Solution: Modify the id of the last ImageView to imageview3. Avoid the control cycle dependency in RelativeLayout.

The essence is: the position of 1 depends on the position relative to 2 and 2 depends on the position relative to 1, but the two relative positions are contradictory.

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