Android listview 滑动时不显示的项选择状态会还原的问题-白红宇的个人博客

Android listview 滑动时不显示的项选择状态会还原的问题

发布日期：2021-06-29 11:29:48 浏览次数：2 分类：技术文章

本文共 12453 字，大约阅读时间需要 41 分钟。

这个问题主要是因为视图没有保存造成的。举例，原问题代码：

package com.zyf.filetrans.adapter;

import android.content.Context;

import android.os.Handler;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.CheckBox;

import android.widget.CompoundButton;

import android.widget.ImageView;

import android.widget.TextView;

import com.zyf.filetrans.MyApp;

import com.zyf.filetrans.R;

import com.zyf.filetrans.Utils.FileUtils;

import com.zyf.filetrans.Utils.LogUtil;

import com.zyf.filetrans.core.entity.SendPackItem;

import com.zyf.filetrans.core.entity.SendPackage;

import com.zyf.filetrans.core.utils.SendPackageUtil;

import com.zyf.filetrans.ui.ChooseItemsActivity;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

public class ItemInfoAdapter extends BaseAdapter {

private static final String TAG=ItemInfoAdapter.class.getSimpleName();

private Context mContext;

private SendPackage mSendPack;

private Handler mHandler;

List<Map.Entry<String, SendPackItem>> mList;

public ItemInfoAdapter(Context mContext) {

this.mContext = mContext;

mSendPack= MyApp.getAppContext().getmSendPackage();

mList=new ArrayList<Map.Entry<String,SendPackItem>>(mSendPack.getSendList().entrySet());

}

public void setHandler(Handler handler){

mHandler=handler;

}

@Override

public int getCount() {

return mList.size();

}

@Override

public Object getItem(int position) {

return mList.get(position).getValue();

}

@Override

public long getItemId(int position) {

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

final SendPackItem sendPackItem = (SendPackItem) getItem(position);

if (convertView == null) {

convertView = View.inflate(mContext, R.layout.item_trans_choose, null);

viewHolder = new ItemInfoAdapter.ItemsHolder();

viewHolder.iv_shortcut = (ImageView) convertView.findViewById(R.id.iv_shortcut);

viewHolder.tv_name = (TextView) convertView.findViewById(R.id.tv_name);

viewHolder.tv_item_info = (TextView) convertView.findViewById(R.id.tv_item_info);

viewHolder.tv_desc = (TextView) convertView.findViewById(R.id.tv_desc);

viewHolder.iv_tick = (ImageView) convertView.findViewById(R.id.iv_tick);

viewHolder.cb_choose = (CheckBox) convertView.findViewById(R.id.cb_choose);

convertView.setTag(viewHolder);

} else {

viewHolder = (ItemInfoAdapter.ItemsHolder) convertView.getTag();

}

if (sendPackItem != null) {

viewHolder.iv_tick.setVisibility(View.GONE);

if (sendPackItem.getType().equals(SendPackageUtil.TAG_PICTURE)) {

viewHolder.iv_shortcut.setImageDrawable(mContext.getResources().getDrawable(R.mipmap.icon_jpg));

viewHolder.tv_name.setText(mContext.getResources().getString(R.string.str_jpeg_desc));

} else if (sendPackItem.getType().equals(SendPackageUtil.TAG_MUSIC)) {

viewHolder.iv_shortcut.setImageDrawable(mContext.getResources().getDrawable(R.mipmap.icon_mp3));

viewHolder.tv_name.setText(mContext.getResources().getString(R.string.str_mp3_desc));

} else if (sendPackItem.getType().equals(SendPackageUtil.TAG_VIDEO)) {

viewHolder.iv_shortcut.setImageDrawable(mContext.getResources().getDrawable(R.mipmap.icon_mp4));

viewHolder.tv_name.setText(mContext.getResources().getString(R.string.str_mp4_desc));

} else if (sendPackItem.getType().equals(SendPackageUtil.TAG_APK)) {