ListView刪除元素不自動刷新,notifyDataSetChanged()無效
######################## ###CityActivity###package com.nero.neroyang.wheather;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.NonNull;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import com.nero.neroyang.wheather.Listener.MyOnClickListener;
import com.nero.neroyang.wheather.adapter.CityListAdapter;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* Created by neroyang on 2017/5/17.
*/
public class CityActivity extends Activity implements AdapterView.OnItemClickListener {
private ListView listView;
private List<String> cities;
private List<Map<String,Object>> litems;
private CityListAdapter cityListAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.city_list);
initView();
}
@NonNull
@Override
public LayoutInflater getLayoutInflater() {
return super.getLayoutInflater();
}
private void initView() {
listView = (ListView) this.findViewById(R.id.city_list);
cities = new ArrayList<String>();
for(int i = 0;i<100;i++) {
cities.add("威海"+i);
}
cityListAdapter = new CityListAdapter(cities,getApplicationContext(),getClickListener);
listView.setAdapter(cityListAdapter);
listView.setOnItemClickListener(this);
}
private MyOnClickListener getClickListener = new MyOnClickListener() {
@Override
public void myOnClick(int position, View v) {
cities.remove(position);
cityListAdapter.setData(cities);
cityListAdapter.notifyDataSetChanged();
}
};
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
}
###Adapter###
package com.nero.neroyang.wheather.adapter;
import android.content.Context;
import android.database.DataSetObserver;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.TextView;
import android.widget.Toast;
import com.nero.neroyang.wheather.CityActivity;
import com.nero.neroyang.wheather.Listener.MyOnClickListener;
import com.nero.neroyang.wheather.MainActivity;
import com.nero.neroyang.wheather.R;
import java.util.ArrayList;
import java.util.List;
/**
* Created by neroyang on 2017/5/17.
*/
public class CityListAdapter extends BaseAdapter {
private List<String> cityList;
private Context context;
private LayoutInflater inflater;
private MyOnClickListener mylistener;
public CityListAdapter(List<String> citylist,Context context,MyOnClickListener listener) {
this.cityList = citylist;
this.context =context;
mylistener = listener;
inflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void setData(List<String> data){
cityList = data;
}
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
return false;
}
@Override
public void registerDataSetObserver(DataSetObserver observer) {
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
}
@Override
public int getCount() {
return cityList.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getView(final int position, View convertView, final ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = inflater.inflate(R.layout.city_item, null);
holder = new ViewHolder();
holder.textView = (TextView) convertView.findViewById(R.id.city_item);
holder.imageView = (ImageView) convertView.findViewById(R.id.delete_item);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.textView.setText(cityList.get(position));
holder.imageView.setOnClickListener(mylistener);
holder.imageView.setTag(position);
return convertView;
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public int getViewTypeCount() {
return 1;
}
@Override
public boolean isEmpty() {
return false;
}
public class ViewHolder {
public TextView textView;
public ImageView imageView;
}
}
###OnclickListener###
package com.nero.neroyang.wheather.Listener;
import android.view.View;
/**
* Created by neroyang on 2017/5/17.
*/
public abstract class MyOnClickListener implements View.OnClickListener {
@Override
public void onClick(View v) {
myOnClick((Integer) v.getTag(), v);
}
public abstract void myOnClick(int position, View v);
}