我在更新ListView时遇到了一些麻烦.
所以我使用了notifyDataSetChanged();但它说它无法解决.
下面是代码中不起作用的部分：
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_activity2);
background2= (RelativeLayout) findViewById(R.id.background);
final ListView theListView = (ListView) findViewById(R.id.listView);
Intent calledActivity=getIntent();
final List pe=calledActivity.getExtras().getStringArrayList("Caller1");
String []s =new String[pe.size()];
for(int i=0;i<pe.size();i++)
{
s[i]=(String)pe.get(i);
}
final listadapter theAdapter= new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,pe);
theListView.setAdapter(theAdapter);
final int cnt=1;
theListView.setonItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent,View view,int position,long id) {
String s1 = String.valueOf(parent.getItemAtPosition(position));
pe.remove(s1);
runOnUiThread(new Runnable() {
public void run() {
theAdapter.notifyDataSetChanged();
}
});
}
});
}
解决方法
notifyDataSetChanged不是listadapter的方法,而是BaseAdapter的方法,(ArrayAdapter是BaseAdapter的子类).要解决此问题,您只需转换listadapter即可
theListView.setonItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent,long id) {
String s1 = String.valueOf(parent.getItemAtPosition(position));
pe.remove(s1);
((BaseAdapter)theAdapter).notifyDataSetChanged();