解决ListView中getView（）多次调用的问题

ListView中getView（）多次调用原因
https://blog.csdn.net/WannerWang/article/details/49097001?utm_source=app

简单的解决方法就是

android:layout_height="wrap_content"
改为
android:layout_height="match_parent"

因为我要用在Dialog上，所以改为match_parent不合适

我打点发现

6个条目调用了42次
3个条目调用了21次

所以是7次

我是在ListView中嵌套Switch开关,点击ListView条目来切换Switch的状态,用List来控制，所以要在getView（）中加入，
这时候问题来了，调用了这么多次，到底要在哪一次加呢？

一个一个分析发现是第四次。
所以：
6组数据
1=0
2=25 (7-3)×6+1
3=26 (7-3)×6+2
4=27 (7-3)×6+3
5=28 (7-3)×6+4
6=29 (7-3)×6+5

解决方法

int List_Count = getCount();
            int aa = List_Count * 4 + 1;
            
            int_list_switch = new int[List_Count];

        
            for (int i = 0; i < List_Count; i++) { 

                int_list_switch[i] = aa;
                aa++;
            }

getView()中

     //优化Switch控件
            if (Optimize_getView == 0) { 
                list_switch.add(holder.sw_Clock);
            }
            if (Optimize_getView == int_list_switch[Optimize_getView_Assist]) { 
                list_switch.add(holder.sw_Clock);
                Log.d("添加switch", "" + Optimize_getView);
                if (list_switch.size() < getCount())
                    Optimize_getView_Assist++;
            }

觉得还有什么更好的办法评论下方留意吧！
全部代码

    class TalkAdapter extends BaseAdapter implements OnClickListener { 
private Context mContext;
private List<Course>  mData;
private List<Switch> list_switch;
private int[] int_list_switch;
private int Optimize_getView = 0;
private int Optimize_getView_Assist =0;
public HashMap<Integer, Boolean> Switch_isSelected= new HashMap<Integer, Boolean>();
public TalkAdapter(Context mContext, List<Course>  mData) { 
this.mData = mData;
this.mContext = mContext;
list_switch = new ArrayList<>();
list_switch.clear();
int List_Count = getCount();
int aa = List_Count * 4 + 1;
int bb = 1;
int_list_switch = new int[List_Count];
for (int i = 0; i < List_Count; i++) { 
int_list_switch[i] = aa;
aa++;
}
// int_list_switch= new int[]{0,17,18,19,28,29};
if (MMkvListDate.isDataCapacity(SwitchStatus_KEY)) {               
Switch_isSelected.clear();
Switch_isSelected = MMkvListDate.getIBHashMap(SwitchStatus_KEY);             
} else { 
for (int i = 0; i < getCount(); i++) { 
Switch_isSelected.put(i, false);
}
}
}
public Switch getaSwitch(int position) { 
// Toast.makeText(mContext,list_switch.size()+ "位置："+position, Toast.LENGTH_SHORT).show();
return list_switch.get(position);
}
@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(final int position, View convertView, ViewGroup parent) { 
ViewHolder holder = null;
if (convertView == null) { 
convertView = LayoutInflater.from(mContext).inflate(R.layout.course_alarmclock_tips_list_item, parent, false);
holder = new ViewHolder();
holder.tv_className = (TextView) convertView.findViewById(R.id.coursealarmclocktipslistitemTextView1);
holder.tv_classTime = (TextView) convertView.findViewById(R.id.coursealarmclocktipslistitemTextView2);
holder.sw_Clock = (Switch)convertView.findViewById(R.id.coursealarmclocktipslistitemSwitch1);
convertView.setTag(holder);
} else { 
holder = (ViewHolder) convertView.getTag();
}
String CourseName =mData.get(position).getName();
String jc = LitepalCourseUtil.getJc(mData.get(position).getTime());
holder.tv_className.setText(CourseName);
holder.tv_classTime.setText(jc);
System.out.println("list_getView()" + position);
//优化Switch控件
if (Optimize_getView == 0) { 
list_switch.add(holder.sw_Clock);
}
if (Optimize_getView == int_list_switch[Optimize_getView_Assist]) { 
list_switch.add(holder.sw_Clock);
Log.d("添加switch", "" + Optimize_getView);
if (list_switch.size() < getCount())
Optimize_getView_Assist++;
}
Log.d("Log_test", "___" + Optimize_getView);
Optimize_getView++;
holder.sw_Clock.setChecked(Switch_isSelected.get(position));
// holder.sw_Clock.setChecked(Switch_isSelected.get(position)==null?false:true);
return convertView;
}
@Override
public void onClick(View p1) { 
}
private class ViewHolder { 
TextView  tv_className;
TextView  tv_classTime;
Switch sw_Clock;
}
}

mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) { 
Switch aSwitch=item_Adapter.getaSwitch(position);
if (aSwitch.isChecked()) { 
aSwitch.setChecked(false);
//进行业务处理
} else { 
aSwitch.setChecked(true);
//进行业务处理
}
Toast.makeText(getContext(), aSwitch.isChecked() + " 第" + position, Toast.LENGTH_SHORT).show();
}
});
}

本文地址：https://blog.csdn.net/jiulang9/article/details/110286785