亮点列表视图项 [英] highlight listview item

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本文介绍了亮点列表视图项的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我要突出一个列表视图项，当我触摸它，留突出。我什么都试过，我发现，但毫无效果。这里是我的code：

这是列表视图：

 ＆LT; ListView控件
    机器人：ID =@ + ID / lvUsers
    机器人：layout_width =300dp
    机器人：layout_height =FILL_PARENT
    机器人：layout_alignParentLeft =真
    机器人：背景=@绘制/ border2
    机器人：choiceMode =singleChoice
    机器人：填充=5DP＆GT;
＆LT; /＆的ListView GT;

的 @绘制/ border2 就在列表视图的边框。

这是ListView项布局：

 ＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
机器人：ID =@ + ID / layoutUsersRow
机器人：layout_width =match_parent
机器人：layout_height =match_parent
机器人：背景=@绘制/ list_selector_background
机器人：方向=垂直＆GT;＆LT;的TextView
    机器人：ID =@ + ID / tvAllUsersName
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：填充=10dp
    机器人：文字=用户名
    机器人：textAppearance =：/＆gt;中的Andr​​oid ATTR / textAppearanceLarge？

这是list_selector_background：

 ＆LT;？XML版本=1.0编码=UTF-8＆GT？;
＆LT;选择的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android＆GT;
    ＆LT;项目的android：state_focused =真正的机器人：可绘制=@色/蓝色/＆GT; ＆LT;！ - 集中 - ＆GT;
    ＆LT;项目的android：state_focused =真正的机器人：STATE_ pressed =真正的机器人：可绘制=@色/蓝色/＆GT; ＆LT;！ - 专注和pressed  - ＆GT;
    ＆LT;项目的android：STATE_ pressed =真正的机器人：可绘制=@色/蓝色/＆GT; ＆LT;！ -  pressed  - ＆GT;
    ＆LT;项目机器人：可绘制=@色/透明/＆GT; ＆LT;！ - 默认 - ＆GT;
＆LT; /选择＆GT;

这是从列表视图适配器code 

 公共类UsersAdapter扩展BaseAdapter实现OnClickListener {LoginActivity背景;
私人列表＆LT;串GT; listOfUsers;公共UsersAdapter（LoginActivity _context，列表与LT;弦乐＆GT; listOfUsers）{
    上下文= _context;
    this.listOfUsers = listOfUsers;
}公众诠释的getCount（）{
    返回listOfUsers.size（）;
}公共对象的getItem（INT位置）{
    返回listOfUsers.get（位置）;
}众长getItemId（INT位置）{
    返回的位置;
}公共查看getView（INT位置，查看convertView，父母的ViewGroup）{
    字符串项= listOfUsers.get（位置）;
    如果（convertView == NULL）{
        LayoutInflater吹气=（LayoutInflater）context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
        convertView = inflater.inflate（R.layout.users_row，NULL）;
    }    TextView的用户名=（的TextView）convertView.findViewById（R.id.tvAllUsersName）;
    UserName.setText（输入）;    的LinearLayout LinLayout =（的LinearLayout）convertView.findViewById（R.id.layoutUsersRow）;
    LinLayout.setFocusableInTouchMode（假）;
    LinLayout.setFocusable（假）;
    LinLayout.setOnClickListener（本）;    返回convertView;
}公共无效的onClick（视图v）{
    //获取该行点击的按钮是
    连续的LinearLayout =（LinearLayout中）V;    TextView的孩子=（TextView中）row.getChildAt（0）;
    如果（child.getText（）。的toString（）。等于（管理））{
        意图I =新意图（com.vorteksed.checkinform.ADMINLOGINACTIVITY）;
        i.putExtra（verificationFor，ADMIN_LOGIN）;
        context.startActivity（ⅰ）;
    }其他{
        context.userClicked（child.getText（）的toString（））;        //从列表中选择用户名后焦点的引脚区
        如果（context.currentList！= NULL）{
            context.etLoginPin.setVisibility（View.VISIBLE）;
            context.tvPin.setVisibility（View.VISIBLE）;
            context.etLoginPin.requestFocus（）;
            context.etLoginPin.setText（）;
            InputMethodManager IMM =（InputMethodManager）context.getSystemService（Context.INPUT_METHOD_SERVICE）;
            imm.showSoftInput（context.etLoginPin，0）;
        }
    }
}
}

这是行不通的。它只而它的pssed $ P $突出的项目。我只要一放开，亮点是走了。

下面是解

删除的android：背景=@绘制/ list_selector_background从列表视图项目布局行。是不是需要在所有的选择。这里是适配器的code：

 公共类UsersAdapter延伸BaseAdapter {LoginActivity背景;
私人列表＆LT;串GT; listOfUsers;
布尔[] arrBgcolor;
私人INT蓝色= Color.BLUE;
私人INT透明= Color.TRANSPARENT;公共UsersAdapter（LoginActivity _context，列表与LT;弦乐＆GT; listOfUsers）{
    上下文= _context;
    this.listOfUsers = listOfUsers;    arrBgcolor =新的布尔[listOfUsers.size（）];
    resetArrbg（）;}私人无效resetArrbg（）{
    的for（int i = 0; I＆LT; arrBgcolor.length;我++）{
        arrBgcolor [I] = FALSE;
    }
}公众诠释的getCount（）{
    返回listOfUsers.size（）;
}公共对象的getItem（INT位置）{
    返回listOfUsers.get（位置）;
}众长getItemId（INT位置）{
    返回的位置;
}公共查看getView（最终诠释的立场，观点convertView，父母的ViewGroup）{
    字符串项= listOfUsers.get（位置）;
    如果（convertView == NULL）{
        LayoutInflater吹气=（LayoutInflater）context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
        convertView = inflater.inflate（R.layout.users_row，NULL）;
    }
    TextView的用户名=（的TextView）convertView.findViewById（R.id.tvAllUsersName）;
    UserName.setText（输入）;    的LinearLayout LinLayout =（的LinearLayout）convertView.findViewById（R.id.layoutUsersRow）;
    LinLayout.setFocusableInTouchMode（假）;
    LinLayout.setFocusable（假）;
    LinLayout.setOnClickListener（新OnClickListener（）{
        公共无效的onClick（视图v）{
            handleClick（V，位置）;
        }
    }）;    如果（arrBgcolor [位置]）
        LinLayout.setBackgroundColor（蓝色）;
    其他
        LinLayout.setBackgroundColor（透明）;    返回convertView;
}公共无效handleClick（视图V，INT位置）{
    连续的LinearLayout =（LinearLayout中）V;    resetArrbg（）;
    arrBgcolor [位置] =真;
    notifyDataSetChanged（）;    TextView的孩子=（TextView中）row.getChildAt（0）;
    如果（child.getText（）。的toString（）。等于（管理））{
        意图I =新意图（com.vorteksed.checkinform.ADMINLOGINACTIVITY）;
        i.putExtra（verificationFor，ADMIN_LOGIN）;
        context.startActivity（ⅰ）;
    }其他{
        context.userClicked（child.getText（）的toString（））;        //从列表中选择用户名后焦点的引脚区
        如果（context.currentList！= NULL）{
            context.etLoginPin.setVisibility（View.VISIBLE）;
            context.tvPin.setVisibility（View.VISIBLE）;
            context.etLoginPin.requestFocus（）;
            context.etLoginPin.setText（）;
            InputMethodManager IMM =（InputMethodManager）context.getSystemService（Context.INPUT_METHOD_SERVICE）;
            imm.showSoftInput（context.etLoginPin，0）;
        }
    }
}}


解决方案

删除选择和尝试以下操作：

修改 

 公共类UsersAdapter扩展BaseAdapter实现OnClickListener {        LoginActivity背景;
        私人列表＆LT;串GT; listOfUsers;
        布尔[] arrBgcolor;
        私人INT蓝色= Color.BLUE;        公共UsersAdapter（LoginActivity _context，列表与LT;弦乐＆GT; listOfUsers）{
            上下文= _context;
            this.listOfUsers = listOfUsers;            arrBgcolor =新的布尔[listOfUsers.size（）];
            resetArrbg（）;        }        私人无效resetArrbg（）{
            的for（int i = 0; I＆LT; arrBgcolor.length;我++）{
                arrBgcolor [I] = FALSE;
            }
        }        ......        公共查看getView（最终诠释的立场，观点convertView，父母的ViewGroup）{
            字符串项= listOfUsers.get（位置）;
            如果（convertView == NULL）{
                LayoutInflater吹气=（LayoutInflater）context.getSystemService（Context.LAYOUT_INFLATER_SERVICE）;
                convertView = inflater.inflate（R.layout.users_row，NULL）;
            }
            TextView的用户名=（的TextView）convertView.findViewById（R.id.tvAllUsersName）;
            UserName.setText（输入）;            的LinearLayout LinLayout =（的LinearLayout）convertView.findViewById（R.id.layoutUsersRow）;
            LinLayout.setFocusableInTouchMode（假）;
            LinLayout.setFocusable（假）;
            LinLayout.setOnClickListener（本）;            //添加以下，位置就是从这里访问
            如果（arrBgcolor [位置]）{
                convertView.setBackgroundColor（蓝色）;
            }
            convertView.setOnClickListener（新OnClickListener（）{
                @覆盖
                公共无效的onClick（视图v）{
                    resetArrbg（）;
                    arrBgcolor [位置] =真;
                    notifyDataSetChanged（）;
                }
            }）;
            返回convertView;
        }

I need to highlight a listview item when i touch it and to stay highlighted. I tried everything I found but nothing worked. Here is my code:

This is the listview:

<ListView
    android:id="@+id/lvUsers"
    android:layout_width="300dp"
    android:layout_height="fill_parent"
    android:layout_alignParentLeft="true"
    android:background="@drawable/border2"
    android:choiceMode="singleChoice"
    android:padding="5dp" >
</ListView>

The @drawable/border2 is just a border around the listview.

This is the listview item layout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layoutUsersRow"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/list_selector_background"
android:orientation="vertical" >

<TextView
    android:id="@+id/tvAllUsersName"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="10dp"
    android:text="User name"
    android:textAppearance="?android:attr/textAppearanceLarge" />

This is list_selector_background:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true" android:drawable="@color/blue" /> <!-- focused -->
    <item android:state_focused="true" android:state_pressed="true" android:drawable="@color/blue" /> <!-- focused and pressed-->
    <item android:state_pressed="true" android:drawable="@color/blue" /> <!-- pressed -->
    <item android:drawable="@color/transparent" /> <!-- default -->
</selector>

This is the code from the listview adapter

public class UsersAdapter extends BaseAdapter implements OnClickListener {

LoginActivity context;
private List<String> listOfUsers;

public UsersAdapter(LoginActivity _context, List<String> listOfUsers) {
    context = _context;
    this.listOfUsers = listOfUsers;
}

public int getCount() {
    return listOfUsers.size();
}

public Object getItem(int position) {
    return listOfUsers.get(position);
}

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

public View getView(int position, View convertView, ViewGroup parent) {
    String entry = listOfUsers.get(position);
    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.users_row, null);
    }

    TextView UserName = (TextView) convertView.findViewById(R.id.tvAllUsersName);
    UserName.setText(entry);

    LinearLayout LinLayout = (LinearLayout) convertView.findViewById(R.id.layoutUsersRow);
    LinLayout.setFocusableInTouchMode(false);
    LinLayout.setFocusable(false);
    LinLayout.setOnClickListener(this);

    return convertView;
}

public void onClick(View v) {
    // get the row the clicked button is in
    LinearLayout row = (LinearLayout) v;

    TextView child = (TextView) row.getChildAt(0);
    if (child.getText().toString().equals("Admin")) {
        Intent i = new Intent("com.vorteksed.checkinform.ADMINLOGINACTIVITY");
        i.putExtra("verificationFor", "ADMIN_LOGIN");
        context.startActivity(i);
    } else {
        context.userClicked(child.getText().toString());

        // focus the pin field after selecting user name from the list
        if (context.currentList != null) {
            context.etLoginPin.setVisibility(View.VISIBLE);
            context.tvPin.setVisibility(View.VISIBLE);
            context.etLoginPin.requestFocus();
            context.etLoginPin.setText("");
            InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.showSoftInput(context.etLoginPin, 0);
        }
    }
}
}

This is not working. It only highlights the item while it's pressed. As soon as i release it, the highlight is gone.

HERE IS THE SOLUTION

Remove the android:background="@drawable/list_selector_background" line from the listview item layout. The selector is not needed at all. And here is the adapter's code:

public class UsersAdapter extends BaseAdapter {

LoginActivity context;
private List<String> listOfUsers;
boolean[] arrBgcolor;
private int blue = Color.BLUE;
private int transparent = Color.TRANSPARENT;

public UsersAdapter(LoginActivity _context, List<String> listOfUsers) {
    context = _context;
    this.listOfUsers = listOfUsers;

    arrBgcolor = new boolean[listOfUsers.size()];
    resetArrbg();

}

private void resetArrbg() {
    for (int i = 0; i < arrBgcolor.length; i++) {
        arrBgcolor[i] = false;                  
    }
}

public int getCount() {
    return listOfUsers.size();
}

public Object getItem(int position) {
    return listOfUsers.get(position);
}

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

public View getView(final int position, View convertView, ViewGroup parent) {
    String entry = listOfUsers.get(position);
    if (convertView == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.users_row, null);
    }


    TextView UserName = (TextView) convertView.findViewById(R.id.tvAllUsersName);
    UserName.setText(entry);

    LinearLayout LinLayout = (LinearLayout) convertView.findViewById(R.id.layoutUsersRow);
    LinLayout.setFocusableInTouchMode(false);
    LinLayout.setFocusable(false);
    LinLayout.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
            handleClick(v, position);
        }
    });

    if (arrBgcolor[position])
        LinLayout.setBackgroundColor(blue);
    else 
        LinLayout.setBackgroundColor(transparent);

    return convertView;
}

public void handleClick(View v, int position) {
    LinearLayout row = (LinearLayout) v;

    resetArrbg();
    arrBgcolor[position] = true;
    notifyDataSetChanged();

    TextView child = (TextView) row.getChildAt(0);
    if (child.getText().toString().equals("Admin")) {
        Intent i = new Intent("com.vorteksed.checkinform.ADMINLOGINACTIVITY");
        i.putExtra("verificationFor", "ADMIN_LOGIN");
        context.startActivity(i);
    } else {
        context.userClicked(child.getText().toString());

        // focus the pin field after selecting user name from the list
        if (context.currentList != null) {
            context.etLoginPin.setVisibility(View.VISIBLE);
            context.tvPin.setVisibility(View.VISIBLE);
            context.etLoginPin.requestFocus();
            context.etLoginPin.setText("");
            InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.showSoftInput(context.etLoginPin, 0);
        }
    }
}

}

解决方案

remove the selector and try the following:

EDIT

public class UsersAdapter extends BaseAdapter implements OnClickListener {

        LoginActivity context;
        private List<String> listOfUsers;
        boolean[] arrBgcolor;
        private int blue = Color.BLUE;

        public UsersAdapter(LoginActivity _context, List<String> listOfUsers) {
            context = _context;
            this.listOfUsers = listOfUsers;

            arrBgcolor = new boolean[listOfUsers.size()];
            resetArrbg();

        }

        private void resetArrbg() {
            for (int i = 0; i < arrBgcolor.length; i++) {
                arrBgcolor[i] = false;                  
            }
        }

        ......

        public View getView(final int position, View convertView, ViewGroup parent) {
            String entry = listOfUsers.get(position);
            if (convertView == null) {
                LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                convertView = inflater.inflate(R.layout.users_row, null);
            }


            TextView UserName = (TextView) convertView.findViewById(R.id.tvAllUsersName);
            UserName.setText(entry);

            LinearLayout LinLayout = (LinearLayout) convertView.findViewById(R.id.layoutUsersRow);
            LinLayout.setFocusableInTouchMode(false);
            LinLayout.setFocusable(false);
            LinLayout.setOnClickListener(this);

            //add the following, the position is accessible from here
            if (arrBgcolor[position]) {
                convertView.setBackgroundColor(blue);
            }
            convertView.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    resetArrbg();
                    arrBgcolor[position] = true;
                    notifyDataSetChanged();
                }
            }); 
            return convertView;
        }

这篇关于亮点列表视图项的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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