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:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <ListView

        android:id="@+id/lv"

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1" >

    </ListView>

    <Button

        android:id="@+id/add"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="add" />

</LinearLayout>

---------------------------------------------------------------

message_item

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <ListView

        android:id="@+id/lv"

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1" >

    </ListView>

    <Button

        android:id="@+id/add"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="add" />

</LinearLayout>

--------------------------------------------------------------------------------------------

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();

    }

}

-----------------------------------------------------------------------------------------------------------------------------------

package com.example.yangyoulistvie
bced
wadddelete;

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);  

         }  

        }

       

}


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