android.widget.AbsListView$RecycleBin.addScrapView

最新推荐文章于 2019-02-20 11:21:14 发布

原创最新推荐文章于 2019-02-20 11:21:14 发布 · 614 阅读

0 ·

CC 4.0 BY-SA版权

本文探讨了Android中Adapter使用多个布局时遇到的数组下标越界问题，并分享了一个有效的解决方案，即确保getViewTypeCount()的返回值大于getItemViewType()的返回值。

adapter 中多个布局数组下标越界

崩溃日志如下：

# main(1)

java.lang.ArrayIndexOutOfBoundsException

length=2; index=2

解析原始

1 android.widget.AbsListView$RecycleBin.addScrapView(AbsListView.java:6842)
2 android.widget.ListView.layoutChildren(ListView.java:1647)
3 android.widget.AbsListView.onLayout(AbsListView.java:2168)
4 android.view.View.layout(View.java:16754)
5 android.view.ViewGroup.layout(ViewGroup.java:5462)
6 android.widget.FrameLayout.layoutChildren(FrameLayout.java:338)
7 android.widget.FrameLayout.onLayout(FrameLayout.java:273)
8 android.view.View.layout(View.java:16754)
9 android.view.ViewGroup.layout(ViewGroup.java:5462)
10 android.widget.LinearLayout.setChildFrame(LinearLayout.java:1764)
11 android.widget.LinearLayout.layoutVertical(LinearLayout.java:1607)
12 android.widget.LinearLayout.onLayout(LinearLayout.java:1516)
13 android.view.View.layout(View.java:16754)
14 android.view.ViewGroup.layout(ViewGroup.java:5462)
15 android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)
16 android.view.View.layout(View.java:16754)
17 android.view.ViewGroup.layout(ViewGroup.java:5462)
18 android.support.v4.view.ViewPager.onLayout(ViewPager.java:1795)
19 android.view.View.layout(View.java:16754)
20 android.view.ViewGroup.layout(ViewGroup.java:5462)
21 android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)
22 android.view.View.layout(View.java:16754)
23 android.view.ViewGroup.layout(ViewGroup.java:5462)
24 android.widget.FrameLayout.layoutChildren(FrameLayout.java:338)
25 android.widget.FrameLayout.onLayout(FrameLayout.java:273)
26 android.view.View.layout(View.java:16754)
27 android.view.ViewGroup.layout(ViewGroup.java:5462)
28 android.widget.LinearLayout.setChildFrame(LinearLayout.java:1764)
29 android.widget.LinearLayout.layoutVertical(LinearLayout.java:1607)
30 android.widget.LinearLayout.onLayout(LinearLayout.java:1516)
31 android.view.View.layout(View.java:16754)
32 android.view.ViewGroup.layout(ViewGroup.java:5462)
33 android.widget.FrameLayout.layoutChildren(FrameLayout.java:338)
34 android.widget.FrameLayout.onLayout(FrameLayout.java:273)
35 android.view.View.layout(View.java:16754)
36 android.view.ViewGroup.layout(ViewGroup.java:5462)
37 android.widget.LinearLayout.setChildFrame(LinearLayout.java:1764)
38 android.widget.LinearLayout.layoutVertical(LinearLayout.java:1607)
39 android.widget.LinearLayout.onLayout(LinearLayout.java:1516)
40 android.view.View.layout(View.java:16754)
41 android.view.ViewGroup.layout(ViewGroup.java:5462)
42 android.widget.FrameLayout.layoutChildren(FrameLayout.java:338)
43 android.widget.FrameLayout.onLayout(FrameLayout.java:273)
44 com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2748)
45 android.view.View.layout(View.java:16754)
46 android.view.ViewGroup.layout(ViewGroup.java:5462)
47 android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2226)
48 android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1983)
49 android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1139)
50 android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6238)
51 android.view.Choreographer$CallbackRecord.run(Choreographer.java:884)
52 android.view.Choreographer.doCallbacks(Choreographer.java:696)
53 android.view.Choreographer.doFrame(Choreographer.java:631)
54 android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:870)
55 android.os.Handler.handleCallback(Handler.java:743)
56 android.os.Handler.dispatchMessage(Handler.java:95)
57 android.os.Looper.loop(Looper.java:150)
58 android.app.ActivityThread.main(ActivityThread.java:5621)
59 java.lang.reflect.Method.invoke(Native Method)
60 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
61 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:684)

我adapter中有两个布局，分别把item设置成 1 和 2 ，然后在 getViewTypeCount 中返回2（有两个布局）。

感觉完全没有问题，但是为什么会这样呢？

后来发现：

getViewTypeCount() 的返回值必须要大于getItemViewType()的返回值。

具体为什么这样我也不清楚，反正这样写就不会出问题，哈哈哈哈，如果有哪位大神知道的话可以给我留言哦。

所以，我们如果以后要写多布局的adapter的话，type一定要从 0 开始。