ListView item中按钮点击实现删除

ListView item中按钮点击实现删除

在处理ListView 中item的按钮点击事件首先需要在item的根布局中添加

android:descendantFocusability="blocksDescendants"属性，否则item的点击事件会把其中image button的点击事件屏蔽掉

item的布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:descendantFocusability="blocksDescendants"    android:layout_width="match_parent"    android:layout_height="match_parent">    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="vertical">    <TextView        android:textColor="#333333"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginTop="8dp"        android:layout_marginLeft="10dp"        android:textSize="18sp"        android:id="@+id/tv_title"        android:text="我的日记"/>        <TextView            android:layout_below="@+id/tv_title"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginTop="8dp"            android:layout_marginLeft="10dp"            android:layout_marginBottom="10dp"            android:id="@+id/tv_content"            android:textColor="#333333"            android:text="内容"/>        <Button            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="删除"            android:layout_centerVertical="true"            android:layout_alignParentRight="true"            android:layout_marginRight="8dp"            android:id="@+id/bt_delect"/>    </RelativeLayout></LinearLayout>

主页面布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    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="com.example.notetext.ui.MainActivity">

<RelativeLayout        android:layout_width="match_parent"        android:layout_height="50dp">

<TextView            android:id="@+id/bt_add"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentLeft="true"            android:layout_centerVertical="true"            android:layout_marginLeft="15dp"            android:onClick="add"            android:text="添加" />

<TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerInParent="true"            android:text="我的日记"            android:textSize="18sp" />

<TextView            android:id="@+id/bt_setting"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentRight="true"            android:layout_centerVertical="true"            android:layout_marginRight="15dp"            android:onClick="set"            android:text="设置" />

</RelativeLayout>    <ListView        android:id="@+id/lv_list"        android:layout_width="match_parent"        android:layout_height="match_parent"></ListView></LinearLayout>

代码：

package com.example.notetext.ui;

import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;

import com.example.notetext.modul.Content;import com.example.notetext.R;

import java.io.Serializable;import java.util.ArrayList;

public class MainActivity extends Activity {    private ListView list;    private ArrayList<Content> arraylist = new ArrayList<>();

@Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        list = (ListView) findViewById(R.id.lv_list);        initData();

list.setOnItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, final int position, long id) {                Content context = arraylist.get(position);                Toast.makeText(getApplicationContext(), "条目点击了", Toast.LENGTH_SHORT).show();                Intent intent = new Intent(getApplicationContext(), LookActivity.class);                intent.putExtra("content", (Serializable) context);                startActivity(intent);            }

});    }    private MyAdapter adapter;

@Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        Toast.makeText(getApplicationContext(), "zhixing", Toast.LENGTH_SHORT).show();        if (data != null) {            switch (requestCode) {                case 1:                    Toast.makeText(getApplicationContext(), "zhixing", Toast.LENGTH_SHORT).show();                    Content content = (Content) data.getExtras().getSerializable("content");                    arraylist.add(content);                    MyAdapter adapter = new MyAdapter(arraylist);                    list.setAdapter(adapter);                    break;            }        }    }

private void initData() {        MyAdapter adapter = new MyAdapter(arraylist);        list.setAdapter(adapter);        adapter.notifyDataSetChanged();    }

public void add(View view) {        Intent intent = new Intent(this, ChangeActivity.class);        startActivityForResult(intent, 1);    }

public void set(View view) {        Intent intent = new Intent (this,SettingActivity.class);        startActivity(intent);

}    public class MyAdapter extends BaseAdapter {        private ArrayList<Content> arrayList;

public MyAdapter(ArrayList<Content> arrayList) {            this.arrayList = arrayList;        }

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

@Override        public Object getItem(int position) {            return arrayList.get(position);        }

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

@Override        public View getView(final int position, View convertView, final ViewGroup parent) {            Holder holder;            if (convertView == null) {                convertView = View.inflate(getApplicationContext(), R.layout.item_note, null);                holder = new Holder(convertView);

convertView.setTag(holder);            } else {                holder = (Holder) convertView.getTag();            }            final Content content = arrayList.get(position);            holder.tv_title.setText(content.getTitle());            holder.tv_content.setText(content.getContent());            holder.bt_delect.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {　　　　　　　　　　　　//将选中的条目在arrayList中移除                    arrayList.remove(position);　　　　　　　　　　　　//刷新界面                    initData();                    Log.e("删除条目","33333333333333");                }            });            return convertView;        }

class Holder {            private TextView tv_title;            private TextView tv_content;            private Button bt_delect;            public Holder(View convertView) {                tv_title =(TextView)convertView.findViewById(R.id.tv_title);                tv_content =(TextView)convertView.findViewById(R.id.tv_content);                bt_delect = (Button) convertView.findViewById(R.id.bt_delect);            }        }    }}