将项目加载到ListView后如何突出显示Android ListView第一项? [英] How to highlight android listview first item after load items to listview?

问题描述

1.这是我的列表视图

1.This is my listview

<ListView
    android:id="@+id/lv_FromTable"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:choiceMode="singleChoice"
    android:listSelector="@drawable/list_selector"
    android:orientation="vertical" />

2.in在onCreate的主要活动中，我加载了项目并将适配器设置为listview

2.in onCreate of main activity i load item and set adapter to listview

lv_FromTable = (ListView)rootView.findViewById(R.id.lv_FromTable);
FromTableAdapter = new ManageTableAdapter(context, FromTableList);
lv_FromTable.setAdapter(FromTableAdapter);
FromTableAdapter.notifyDataSetChanged();

3.i想突出显示第一个项目，同时单击列表视图项目

3.i want to highlight on first item same click on listview item

4.i已经尝试了以下代码

4.i have already tried below code

lv_FromTable.performItemClick(lv_FromTable.getAdapter().getView(0, null, null), 0, lv_FromTable.getAdapter().getItemId(0));

这是引发onitemclick事件，但未突出显示第一项.

it's raise onitemclick event but not highlight on first item.

1. 在将项目加载到listview后如何突出显示android listview的第一项?

推荐答案

FromTableAdapter.setSelectedPosition(0); 
FromTableAdapter.notifyDataSetChanged();

将getter和setter放在适配器中具有选定位置的位置，并使用该变量并在适配器的getView中突出显示选定的行.

Have getter and setter in adapter with selected position and use the variable and highlight the selected row in getView of adapter.

或

您正在执行单击右键. 在onItemClick，view.setSelected(true);中，但是您的可绘制xml应该具有类似的内容

You're performing click right. In onItemClick, view.setSelected(true); but your drawable xml should have something like

<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item 
        android:state_selected="true"
        android:drawable="@color/pressed_color"/>
    <item
        android:drawable="@color/default_color" />
</selector> 

或

lv_FromTable.setItemChecked(0,true);

编辑:不要忘记，没有上面的listSelector不会起作用

Edit : Don't forget, without the listSelector above wont work

<ListView
    android:id="@android:id/list"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:listSelector="@drawable/list_selector_background" />  

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