点击类别，并通过Toast将类别的名字显示出来

来源：互联网发布：软件ui设计编辑：程序博客网时间：2024/04/26 22:45

点击类别时不能显示出来，发现有异常却并不报错

listView.setOnItemClickListener(new OnItemClickListener(){     public void onItemClick(AdapterView<?>av, View v, int     position, long id) {..........

显示的异常是：

The method setOnItemClickListener(AdapterView.OnItemClickListener) in the type AdapterView<ListAdapter> is not applicable for the arguments (new OnItemClickListener(){})

需要的是AdapterView.OnItemClickListener,鼠标放在OnItemClickListener上，
其实是另一种view的OnItemClickListener。
所以为了避免混淆就直接写new AdapterView.OnItemClickListener(){...}，
并导入android.widget.AdapterView

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {     public void onItemClick(AdapterView<?>adapterView, View viewc, int     position, long id) {     Category category = categoryList.get(position);               Toast.makeText(StudyActivity.this, category.getName(),                          Toast.LENGTH_LONG).show();                }});

好了！现在就可以正常显示了

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