流程是集合提供数据，listview显示，当edittext内容变动时回调处理。但是list空了，看代码---
public class MainActivity extends Activity {
private EditText etText;
private ListView lvList;
public ArrayList<String> slist;// 元数据
private ArrayList<String> newList;// 符合条件的数据
private LayoutInflater inflater;
private MainAdapter adapter;
private Context context;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = this;
init();
}
private void init() {
etText = (EditText) findViewById(R.id.et_self_text);
// etText.setCallBack(this);
inflater = LayoutInflater.from(context);
// TODO Auto-generated method stub
slist = new ArrayList<String>();
slist.add("sdga");
slist.add("tkmjt");
slist.add("sdga");
slist.add("sdgrtja");
slist.add("tkmjt");
slist.add("sdga");
slist.add("sdgrtja");
slist.add("rtjrtj");
slist.add("dfgkkl");
newList = slist;
adapter = new MainAdapter(context, newList);
lvList = (ListView) findViewById(R.id.lv_main);
lvList.setAdapter(adapter);
etText.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
newList.clear();
showMsg(slist.toString());
if (etText.getText() != null) {
String inText = etText.getText().toString();
newList = getNewList(inText);
} else {
newList = slist;
}
lvList.setAdapter(adapter);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3){
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
});
}
private ArrayList<String> getNewList(String in) {
ArrayList<String> mList = new ArrayList<String>();
int len = slist.size();
for (int i = 0; i < len; i++) {
if (slist.get(i).contains(in)) {
mList.add(in);
}
}
return mList;
}
private void showMsg(String text) {
Toast.makeText(MainActivity.this, text, 0).show();
}
}
下面是adapter
public class MainAdapter extends BaseAdapter{
private Context context;
private ArrayList<String> list;
public MainAdapter(Context context,ArrayList<String> list){
if(list==null){
list=new ArrayList<String>();
}
this.list=list;
this.context=context;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return list.get(arg0);
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public View getView(int position, View convertView, ViewGroup arg2) {
// TODO Auto-generated method stub
ViewHolder holder;
if(convertView==null){
holder=new ViewHolder();
convertView=View.inflate(context, R.layout.main_item, null);
holder.tView=(TextView) convertView.findViewById(R.id.tv_main_item);
convertView.setTag(holder);
}else{
holder=(ViewHolder) convertView.getTag();
}
holder.tView.setText(list.get(position));
return convertView;
}
private class ViewHolder{
TextView tView;
}
}
布局就一个edittext listview
------解决思路----------------------
用newList.addall替换newList = slist; newlist空应该是clear;