这篇文章是一个listview批量删除功能的一个demo，可以根据自己的需求进行拓展。
源码地址：https://github.com/lerendan/ListViewBatchDelete
效果图
1、bean
在bean中加入一个isChecked，表示是否被选中（点击），默认为false
public class Check {
private String id; //ID
private String name; //姓名
private boolean isChecked; //选中状态
public boolean isChecked() {
return isChecked;
}
public void setChecked(boolean checked) {
isChecked = checked;
}
public Check(String id, String name) {
this.id = id;
this.name = name;
}
public void setId(String id) {
this.id = id;
}
public String getId() {
return id;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
}
2、listview的adapter
在getview中判断bean中的isChecked的值，若为true则显示一个小图片表示被选中了
public class Check_Adapter extends BaseAdapter {
private List<Check> mData;
private LayoutInflater mInflater;
public Check_Adapter(Context context, List<Check> data) {
mInflater = LayoutInflater.from(context);
this.mData = data;
}
public void setChecks(List<Check> data) {
this.mData = data;
}
@Override
public int getCount() {
return mData.size();
}
@Override
public Object getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder = null;
if (convertView == null) {
viewHolder = new ViewHolder();
convertView = mInflater.inflate(R.layout.lv_check_item, null);
viewHolder.iv_click = (ImageView) convertView.findViewById(R.id.iv_click);
viewHolder.tv_id = (TextView) convertView.findViewById(R.id.tv_id);
viewHolder.tv_name = (TextView) convertView.findViewById(R.id.tv_name);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
if (mData.get(position).isChecked()) {
viewHolder.iv_click.setVisibility(View.VISIBLE);
}else {
viewHolder.iv_click.setVisibility(View.INVISIBLE);
}
viewHolder.tv_id.setText(mData.get(position).getId());
viewHolder.tv_name.setText(mData.get(position).getName());
return convertView;
}
public class ViewHolder {
public TextView tv_id, tv_name;
public ImageView iv_click;
}
}
3、Activity or Fragment
批量删除的原理就是判断bean中的isCheck的值，为true就删除
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private List<Check> mData;
private Button btn_confirm;
private ListView mListview;
private Check_Adapter mAdapter;
private int n = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content_check_ui);
initView();
initData();
setListener();
}
private void initView() {
mListview = (ListView)findViewById(R.id.lv);
btn_confirm = (Button)findViewById(R.id.confirm);
}
private void initData() {
if (mAdapter == null) {
mData = getCheckData();
mAdapter = new Check_Adapter(MainActivity.this, mData);
mListview.setAdapter(mAdapter);
} else {
mAdapter.setChecks(mData);
mAdapter.notifyDataSetChanged();
}
}
private List<Check> getCheckData() {
List<Check> data = new ArrayList<Check>();
Check check1 = new Check("id111111111111", "张三 11111111");
Check check2 = new Check("id222222222222", "但超 22222222");
Check check3 = new Check("id333333333333","李四 33333333");
Check check4 = new Check("id444444444444","王五 44444444");
Check check5 = new Check("id555555555555", "赵六 55555555");
Check check6 = new Check("id666666666666", "张七 66666666");
Check check7 = new Check("id777777777777","吴八 77777777");
Check check8 = new Check("id888888888888", "关关 88888888");
Check check9 = new Check("id999999999999", "笑笑 99999999");
data.add(check1);
data.add(check2);
data.add(check3);
data.add(check4);
data.add(check5);
data.add(check6);
data.add(check7);
data.add(check8);
data.add(check9);
return data;
}
private void setListener() {
mListview.setOnItemClickListener(new MyOnItemClickListner());
btn_confirm.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.confirm:
if (n != 0) {
deleteCheckedItem(); //验证完成后删除选中的item
} else {
Toast.makeText(this, "未点击", Toast.LENGTH_SHORT).show();
}
break;
default:
break;
}
}
/**
* 删除选中的Item
*/
public void deleteCheckedItem() {
Iterator<Check> iterator = mData.iterator();
while (iterator.hasNext()) {
Check check = iterator.next();
if (check.isChecked()) {
iterator.remove();
}
}
mAdapter.setChecks(mData);
mAdapter.notifyDataSetChanged();
mListview.setSelection(0);
n = 0;
btn_confirm.setText("确认（" + n + "）");
}
//Listview Item的点击事件
private class MyOnItemClickListner implements AdapterView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Check check = mData.get(position);
if (check.isChecked()) {
check.setChecked(false);
n--;
btn_confirm.setText("确认（" + n + "）");
} else {
check.setChecked(true);
n++;
btn_confirm.setText("确认（" + n + "）");
}
mAdapter.setChecks(mData);
mAdapter.notifyDataSetChanged();
}
}
}
拓展：这是一个基本的listview批量删除功能，可以根据自己的需求做拓展。比如，在menu里加一个全选的功能；把标识item被选中的imageview换成checkbox；加入删除的动画。
