android ListView点击item删除事件的实现

2016 -10 -12 修改

之前只是为自己做个笔记，没想到还挺多人需要这个，现在对代码进行了优化，并附上源码，希望能够帮助到需要的同行

activity_main:

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message_item

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package com.example.yangyoulistviewadddelete;

import java.util.ArrayList;

import com.example.yangyoulistviewadddelete.MessageAdapter.DeleteCallback;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;

public class MainActivity extends Activity implements OnClickListener,
DeleteCallback {

private ListView lv;
private Button add;
ArrayList<String> data = new ArrayList<String>();
int count ;
private MessageAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv = (ListView) findViewById(R.id.lv);
add = (Button) findViewById(R.id.add);
adapter = new MessageAdapter(this);
adapter.setData(data);
adapter.setDeleteCallback(this);
lv.setAdapter(adapter);
add.setOnClickListener(this);
}

@Override
public void onClick(View v) {
count = count+1;
data.add("A" + count);
adapter.setData(data);
adapter.notifyDataSetInvalidated();
}

@Override
public void deletePosition(int position) {
data.remove(position);
adapter.setData(data);
adapter.notifyDataSetInvalidated();
}
}

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package com.example.yangyoulistviewadddelete;

import java.util.ArrayList;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.TextView;

public class MessageAdapter extends BaseAdapter {

private ArrayList<String> data;
private LayoutInflater mInflater;
private int saveposition;
private DeleteCallback Callback;

public MessageAdapter(Context context) {
this.mInflater = LayoutInflater.from(context);
}

@Override
public int getCount() {
return data.size();
}

@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup arg2) {

ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.message_item, null);
holder.name = (TextView) convertView.findViewById(R.id.tv_titel);
holder.viewBtn = (Button) convertView.findViewById(R.id.bt_delete);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}

holder.name.setText(data.get(position));

holder.viewBtn.setTag(position);// TODO 这里是关键

holder.viewBtn.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
saveposition = Integer.parseInt(v.getTag().toString());// TODO
Callback.deletePosition(saveposition);
}
});

return convertView;
}

// 提取出来方便点
public final class ViewHolder {
public TextView name;
public Button viewBtn;
}

public interface DeleteCallback {

void deletePosition(int saveposition);

}
public void setDeleteCallback(DeleteCallback Callback ){
this.Callback=Callback;
}

public void setData(ArrayList<String> data2) {
this.data=data2;
}
}

/**
* ListView 与ScrollView 布局嵌套高度计算工具类
*
*/
public class ListViewAdapterUtil {
public static void setListViewHeightBasedOnChildren(ListView listView) {
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
}

int totalHeight = 0;
if(listAdapter.getCount() == 0){
return;
}else{
for (int i = 0; i < listAdapter.getCount(); i++) {
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}

ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
}
}

} android ListView点击item删除事件的实现

源码下载地址 http://download.csdn.net/detail/anroidyanyou/9651567

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android ListView点击item删除事件的实现

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