布局文件
```
list.add("xiaoli");
list.add("xiaolhua");
list.add("xiaoming");
list.add("xiaowa");
list.add("xiaoliang");
ArrayAdapter adapter =new ArrayAdapter(getApplicationContext(),R.layout.item,list);
act.setAdapter(adapter);
act.setThreshold(1);
报错 ArrayAdapter requires the resource ID to be a TextView
```
将item布局文件改为
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