Android研发过程中，经常会有这样的需求，在listview、recycleview、gridview等列表控件的item中有button按钮，从而实现item的删除、收藏等等实际需求操作，可是研发人员普遍会遇到一个问题，整体item的点击事件、长按事件无效

问题原因：

button事件冲突导致列表控件的item点击事件、长按事件无效

解决方案：

（1）将列表控件中item中的button的focusable属性设置为false，以免它抢了父控件（也就是每一个Item）的焦点

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="wrap_content">    <RelativeLayout android:id="@+id/cartleft" android:layout_width="wrap_content" android:layout_height="wrap_content"> <RelativeLayout     android:layout_width="120dp"     android:layout_height="170dp">     <!--商品图片-->     <ImageView  android:id="@+id/medicineImage"  android:layout_width="75dp"  android:layout_height="75dp"  android:layout_margin="5px"/>     <TextView android:id="@+id/mname"  android:layout_width="80dp"  android:layout_height="wrap_content"  android:layout_below="@+id/medicineImage"  android:text="test"  android:textSize="25px" />     <TextView android:id="@+id/mprice"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:textSize="25px"  android:text="价格"  android:textColor="@color/red"  android:layout_below="@+id/mname"/>     <Button  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:gravity="bottom|right"  android:background="@drawable/add2cartimage"  android:layout_alignParentRight="true"  android:layout_alignParentEnd="true"  android:focusable="false"  android:layout_toRightOf="@+id/medicineImage"  android:layout_toEndOf="@+id/medicineImage"  android:layout_alignTop="@+id/mname" /> </RelativeLayout>    </RelativeLayout></RelativeLayout>

（2）将button控件用textview控件代替实现，将TextView的Backgroud设置成一个selector实现button的点击效果，这样就可以绕过ListView和Button的冲突问题

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:orientation="vertical">    <RelativeLayout android:id="@+id/cartleft" android:layout_width="wrap_content" android:layout_height="wrap_content"> <RelativeLayout     android:layout_width="120dp"     android:layout_height="170dp">     <!--商品图片-->     <ImageView  android:id="@+id/medicineImage"  android:layout_width="75dp"  android:layout_height="75dp"  android:layout_margin="5px" />     <TextView  android:id="@+id/mname"  android:layout_width="80dp"  android:layout_height="wrap_content"  android:layout_below="@+id/medicineImage"  android:text="test"  android:textSize="25px" />     <TextView  android:id="@+id/mprice"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_below="@+id/mname"  android:text="价格"  android:textColor="@color/red"  android:textSize="25px" />     <TextView  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_alignParentEnd="true"  android:layout_alignParentRight="true"  android:layout_alignTop="@+id/mname"  android:clickable="true"  android:layout_toEndOf="@+id/medicineImage"  android:layout_toRightOf="@+id/medicineImage"  android:background="@drawable/add2cartimage"  android:gravity="bottom|right" /> </RelativeLayout>    </RelativeLayout></RelativeLayout>

实战样例：

MainActivity.java

package itbird.com.myapplication33;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.AdapterView;import android.widget.ListView;import android.widget.Toast;import java.util.ArrayList;/** * MainActivity * @author itbird */public class MainActivity extends AppCompatActivity implements ListViewAdapter.ListViewButtonClickListener {    @Override    protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ListView listView = (ListView) findViewById(R.id.listview); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {     @Override     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {  Toast.makeText(MainActivity.this, "listview item click position = " + position, Toast.LENGTH_SHORT).show();     } }); listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {     @Override     public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {  Toast.makeText(MainActivity.this, "listview item long click position = " + position, Toast.LENGTH_SHORT).show();  return true;     } }); ArrayList<String> data = new ArrayList<String>(); data.add("test1"); data.add("test2"); data.add("test3"); ListViewAdapter adapter = new ListViewAdapter(this, data); adapter.setOnButtonClickListener(this); listView.setAdapter(adapter);    }    @Override    public void onClick(int position) { Toast.makeText(MainActivity.this, "listview item button long click position = " + position, Toast.LENGTH_SHORT).show();    }}

ListViewAdapter.java

package itbird.com.myapplication33;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.TextView;import java.util.ArrayList;/** * ListViewAdapter * Created by itbird on 2018/8/3. */public class ListViewAdapter extends BaseAdapter {    private Context mContext;    private ArrayList<String> mList;    private LayoutInflater mInflater;    private ListViewButtonClickListener mListener;    public ListViewAdapter(Context context, ArrayList<String> stringList) { mContext = context; mList = stringList; mInflater = LayoutInflater.from(mContext);    }    public void setOnButtonClickListener(ListViewButtonClickListener listener) { mListener = listener;    }    @Override    public int getCount() { if (mList == null) {     return 0; } return mList.size();    }    @Override    public Object getItem(int position) { if (mList == null) {     return null; } return mList.get(position);    }    @Override    public long getItemId(int position) { return position;    }    @Override    public View getView(final int position, View convertView, ViewGroup parent) { ViewHolder holder = null; if (convertView == null) {     // 下拉项布局     convertView = mInflater.inflate(R.layout.list_item_btn, null);     holder = new ViewHolder();     holder.title = (TextView) convertView.findViewById(R.id.title);     holder.btn = (Button) convertView.findViewById(R.id.btn);     convertView.setTag(holder); } else {     holder = (ViewHolder) convertView.getTag(); } holder.title.setText(mList.get(position)); // 通常将position设置为tag，方便之后判断点击的button是哪一个 holder.btn.setTag(position); holder.btn.setOnClickListener(new View.OnClickListener() {     @Override     public void onClick(View v) {  if (mListener != null) {      mListener.onClick(position);  }     } }); return convertView;    }    class ViewHolder { TextView title; Button btn;    }    public interface ListViewButtonClickListener { void onClick(int position);    }}

list_item_btn.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:gravity="center_vertical"    android:orientation="horizontal">    <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="6dp" android:textSize="16sp" />    <Button android:id="@+id/btn" android:layout_width="100dp" android:layout_height="wrap_content" android:layout_marginLeft="20dp" android:focusable="false" android:text="Button" android:textSize="16sp" /></LinearLayout>

activity_main.xml

总结

看完实际样例代码后，相信各位看官都已对本文知识要点“了然在心”，原因与解决方案都在围绕**“View 的事件冲突机制”这个中心点，文章结尾，小编这里提出一个问题，希望可以达到“抛砖引玉”**的效果，让各位看官主动去探索view事件传递机制的更深层次的知识点。

好了，本文话尽如此，期待各位在这个知识点有更多的收获。