Java 可展开列表视图,垂直子视图
我制作了一个类似于此链接中的可扩展列表:,但我想让孩子看起来是垂直的,而不是水平的 我只有1个包含以下内容的xml:Java 可展开列表视图,垂直子视图,java,android,expandablelistview,Java,Android,Expandablelistview,我制作了一个类似于此链接中的可扩展列表:,但我想让孩子看起来是垂直的,而不是水平的 我只有1个包含以下内容的xml: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <Expan
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ExpandableListView android:id="@android:id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:groupIndicator="@null"/>
其他的都在课堂上。如何将它们设置为垂直?
我的java代码与链接中的相同。请看一下这个示例。希望这对你有帮助
public class ExpandListViewActivity extends ExpandableListActivity
{
/**
* strings for group elements
*/
static final String arrGroupelements[] =
{
"India",
"Australia",
"England",
"South Africa"
};
/**
* strings for child elements
*/
static final String arrChildelements[][] =
{
{
"Sachin Tendulkar",
"Raina",
"Dhoni",
"Yuvi"
},
{
"Ponting",
"Adam Gilchrist",
"Michael Clarke"
},
{
"Andrew Strauss",
"kevin Peterson",
"Nasser Hussain"
},
{
"Graeme Smith",
"AB de villiers",
"Jacques Kallis"
}
};
static final int arrChildelementsim[][] =
{
{
R.drawable.ic_launcher,
R.drawable.aqua,
R.drawable.pin_red,
R.drawable.aqua,
},
{
R.drawable.ic_launcher,
R.drawable.ic_launcher,
R.drawable.ic_launcher,
},
{
R.drawable.ic_launcher,
R.drawable.ic_launcher,
R.drawable.ic_launcher,
},
{
R.drawable.ic_launcher,
R.drawable.ic_launcher,
R.drawable.ic_launcher,
}
};
DisplayMetrics metrics;
int width;
ExpandableListView expList;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
expList = getExpandableListView();
metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
width = metrics.widthPixels;
//this code for adjusting the group indicator into right side of the view
expList.setIndicatorBounds(width - GetDipsFromPixel(50), width - GetDipsFromPixel(10));
expList.setAdapter(new ExpAdapter(this));
expList.setOnGroupExpandListener(new OnGroupExpandListener()
{
@Override
public void onGroupExpand(int groupPosition)
{
Log.e("onGroupExpand", "OK");
}
});
expList.setOnGroupCollapseListener(new OnGroupCollapseListener()
{
@Override
public void onGroupCollapse(int groupPosition)
{
Log.e("onGroupCollapse", "OK");
}
});
expList.setOnChildClickListener(new OnChildClickListener()
{
@Override
public boolean onChildClick(ExpandableListView arg0, View arg1, int arg2,
int arg3, long arg4) {
Log.e("OnChildClickListener", "OK");
// TODO Auto-generated method stub
return false;
}
});
}
public int GetDipsFromPixel(float pixels)
{
// Get the screen's density scale
final float scale = getResources().getDisplayMetrics().density;
// Convert the dps to pixels, based on density scale
return (int) (pixels * scale + 0.5f);
}
public class ExpAdapter extends BaseExpandableListAdapter {
private Context myContext;
public ExpAdapter(Context context) {
myContext = context;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return null;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.child_row, null);
}
TextView tvPlayerName = (TextView) convertView.findViewById(R.id.tvPlayerName);
ImageView tvPlayerimage = (ImageView) convertView.findViewById(R.id.tvPlayerImage);
tvPlayerName.setText(arrChildelements[groupPosition][childPosition]);
tvPlayerimage.setImageResource(arrChildelementsim[groupPosition][childPosition]);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return arrChildelements[groupPosition].length;
}
@Override
public Object getGroup(int groupPosition) {
return null;
}
@Override
public int getGroupCount() {
return arrGroupelements.length;
}
@Override
public long getGroupId(int groupPosition) {
return 0;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) myContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.group_row, null);
}
TextView tvGroupName = (TextView) convertView.findViewById(R.id.tvGroupName);
tvGroupName.setText(arrGroupelements[groupPosition]);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
}
Child_row.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="40dip"
android:gravity="center_vertical"
android:orientation="horizontal" >
<ImageView
android:id="@+id/tvPlayerImage"
android:layout_width="wrap_content"
android:layout_height="30dip"
android:gravity="center_vertical"
android:layout_marginLeft="50dip"
>
</ImageView>
<TextView
android:id="@+id/tvPlayerName"
android:layout_width="wrap_content"
android:layout_height="30dip"
android:gravity="center_vertical"
android:layout_marginLeft="10dip"
android:textSize="14sp" >
</TextView>
</LinearLayout>
group_row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tvGroupName"
android:layout_width="wrap_content"
android:layout_height="40dip"
android:gravity="center_vertical"
android:paddingLeft="30dip"
android:textSize="16sp"
android:textStyle="bold"
>
</TextView>
</LinearLayout>
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
<ExpandableListView
android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:groupIndicator="@drawable/group_indicator" >
<TextView
android:id="@+id/android:empty"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="hello" >
</TextView>
</ExpandableListView>
</LinearLayout>
公共类ExpandListViewActivity扩展了ExpandableListActivity
{
/**
*组元素的字符串
*/
静态最终字符串arrGroupelements[]=
{
“印度”,
“澳大利亚”,
“英格兰”,
“南非”
};
/**
*子元素的字符串
*/
静态最终字符串元素[][]=
{
{
“Sachin Tendulkar”,
“雷娜”,
“多尼”,
“尤维”
},
{
“庞廷”,
“亚当·吉尔吉斯”,
“迈克尔·克拉克”
},
{
“安德鲁·施特劳斯”,
“凯文·彼得森”,
“纳赛尔·侯赛因”
},
{
“格雷姆·史密斯”,
“AB de villiers”,
“雅克·卡利斯”
}
};
静态最终整数arrChildelementsim[]]=
{
{
R.drawable.ic_发射器,
R.drawable.aqua,
R.drawable.pin_红色,
R.drawable.aqua,
},
{
R.drawable.ic_发射器,
R.drawable.ic_发射器,
R.drawable.ic_发射器,
},
{
R.drawable.ic_发射器,
R.drawable.ic_发射器,
R.drawable.ic_发射器,
},
{
R.drawable.ic_发射器,
R.drawable.ic_发射器,
R.drawable.ic_发射器,
}
};
显示度量;
整数宽度;
可扩展列表视图解释列表;
@凌驾
创建时的公共void(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
//setContentView(R.layout.main);
expList=getExpandableListView();
metrics=新的DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(度量);
宽度=度量。宽度像素;
//此代码用于将组指示器调整到视图右侧
setIndicatorBounds(宽度-GetDipsFromPixel(50),宽度-GetDipsFromPixel(10));
setAdapter(新的ExpAdapter(this));
expList.setOnGroupExpandListener(新的OnGroupExpandListener()
{
@凌驾
public void onGroupExpand(int groupPosition)
{
Log.e(“onGroupExpand”、“OK”);
}
});
expList.setOnGroupCollapseListener(新的OnGroupCollapseListener()
{
@凌驾
公共void-onGroupCollapse(int-groupPosition)
{
Log.e(“正常”、“正常”);
}
});
expList.setOnChildClickListener(新的OnChildClickListener()
{
@凌驾
公共布尔onChildClick(ExpandableListView arg0、视图arg1、int arg2、,
整数arg3,长arg4){
Log.e(“OnChildClickListener”,“OK”);
//TODO自动生成的方法存根
返回false;
}
});
}
公共整型GetDipsFromPixel(浮点像素)
{
//获取屏幕的密度刻度
最终浮动比例=getResources().getDisplayMetrics().density;
//根据密度比例将dps转换为像素
返回(int)(像素*比例+0.5f);
}
公共类ExpAdapter扩展了BaseExpandableListAdapter{
私人语境;
公共ExpAdapter(上下文){
myContext=上下文;
}
@凌驾
公共对象getChild(int-groupPosition,int-childPosition){
返回null;
}
@凌驾
公共长getChildId(int-groupPosition,int-childPosition){
返回0;
}
@凌驾
公共视图getChildView(int-groupPosition、int-childPosition、,
布尔值isLastChild、视图转换视图、视图组父级){
if(convertView==null){
LayoutInflater充气器=(LayoutInflater)myContext.getSystemService(Context.LAYOUT\u充气器\u服务);
convertView=充气机。充气(R.layout.child_行,空);
}
TextView-tvPlayerName=(TextView)convertView.findViewById(R.id.tvPlayerName);
ImageView tvPlayerimage=(ImageView)convertView.findViewById(R.id.tvPlayerimage);
setText(arrChildelements[groupPosition][childPosition]);
tvPlayerimage.setImageResource(arrChildelementsim[groupPosition][childPosition]);
返回视图;
}
@凌驾
公共整数getChildrenCount(整数组位置){
返回元素[groupPosition]。长度;
}
@凌驾
公共对象getGroup(int-groupPosition){
返回null;
}
@凌驾
public int getGroupCount(){
返回argroupelements.length;
}
@凌驾
公共长getGroupId(int-groupPosition){
返回0;
}
@凌驾
公共视图getGroupView(int-groupPosition,布尔值isExpanded,
视图(视图、视图组父级){
if(convertView==null){
LayoutInflater充气器=(LayoutInflater)myContext.getSystemService(Context.LAYOUT\u充气器\u服务);
convertView=充气机。充气(R.layout.group_行,空);
}
TextView-tvGroupName=(TextView)convertView.findViewById(R.id.tvGroupName);
tvGroupName.setText(arrGroupelements[groupPosition]);
返回视图;
}
@凌驾
公共布尔表ID(){
返回false;
}
@凌驾
公共布尔值isChildSelectable(int-groupPosition,int-childPosition){
返回true;
}
}
}
Child_row.xml
group_row.xml
main.xml
这不起作用,我在每个OnChildClickListener中都遇到了一个java代码错误