我有一个可扩展的列表视图。我已经放了一些虚拟数据,并且evrything似乎没问题,但是当我运行应用程序时,所有组都处于折叠模式,当我点击它们时它们不会生效。这是截图:
Group的XML是:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/bg_slider"
android:orientation="horizontal" >
<TextView
android:id="@+id/tvRecipeName"
style="@style/normal_text.bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="50dp"
android:layout_marginRight="5dp"
android:focusable="false"
android:lines="1"
android:maxLines="1"
android:text="@string/dd_title" />
<ImageButton
android:id="@+id/ibDeleteRecipe"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="15dp"
android:background="@color/transparent"
android:contentDescription="@string/cd"
android:focusable="false"
android:src="@android:drawable/ic_menu_delete" />
<View
android:layout_width="1dp"
android:layout_height="50dp"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/tvRecipeName"
android:focusable="false" />
</RelativeLayout>
孩子的XML是:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/White"
android:gravity="left|center_vertical" >
<View
android:layout_width="1dp"
android:layout_height="35dp"
android:layout_toLeftOf="@+id/tvIngredient"
android:focusable="false" />
<TextView
android:id="@+id/tvIngredient"
style="@style/normal_text_black"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="30dp"
android:layout_marginRight="5dp"
android:lines="1"
android:maxLines="1"
android:text="@string/dd_title"
android:focusable="false" />
<ImageButton
android:id="@+id/ibDeleteIngredient"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="15dp"
android:background="@color/transparent"
android:contentDescription="@string/cd"
android:focusable="false"
android:src="@android:drawable/btn_dialog" />
</RelativeLayout>
在main.xml中,可扩展列表的定义是:
<ExpandableListView
android:id="@+id/elv"
android:layout_width="match_parent"
android:layout_height="match_parent" />
我有一个适配器,我为此编写了这段代码:
public class ExpAdapter extends BaseExpandableListAdapter {
private final String TAG = "ExpAdapter";
private Context context;
static final String arrGroupelements[] = {"India", "Australia", "England", "South Africa"};
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"} };
public ExpAdapter(Context context) {
this.context = context;
Log.i(TAG, "Adapter created.");
}
@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) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.elv_child, null);
}
TextView tvItem = (TextView) convertView.findViewById(R.id.tvIngredient);
ImageButton ibDelete = (ImageButton) convertView.findViewById(R.id.ibDeleteIngredient);
ibDelete.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.i(TAG, "******");
}
});
tvItem.setText(arrChildelements[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) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.elv_group, null);
}
TextView tvItem = (TextView) convertView.findViewById(R.id.tvRecipeName);
ImageButton ibDeleteRcipe = (ImageButton) convertView.findViewById(R.id.ibDeleteRecipe);
ibDeleteRcipe.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.i(TAG, "%%%%%%");
}
});
tvItem.setText(arrGroupelements[groupPosition]);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}
最后,在片段活动的代码中,我有:
public class ShoppingList extends FragmentActivity {
ExpAdapter adapter = new ExpAdapter(this);
//Linking expnadable list view
expListView = (ExpandableListView) findViewById(R.id.elv);
expListView.setAdapter(adapter);
expListView.setOnGroupExpandListener(new OnGroupExpandListener() {
@Override
public void onGroupExpand(int groupPosition) {
Log.i(TAG, "Group " + groupPosition + " expanded.");
}
});
expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() {
@Override
public void onGroupCollapse(int groupPosition) {
Log.i(TAG, "Group " + groupPosition + " collapsed.");
}
});
expListView.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
Log.i(TAG, "item " + childPosition + " of group " + groupPosition + " clicked.");
return false;
}
});
}
当我运行应用程序并单击父母时,没有任何反应。我尝试在购物类结束时添加以下代码行:
int count = adapter.getGroupCount();
for (int position = 1; position <= count; position++)
expListView.expandGroup(position - 1);
现在,当我运行应用程序结果时,就像这个截图:
如果我点击删除按钮(父母或孩子),我可以看到它们生效(因为我检查了logcat),但是当我点击孩子或父母时没有任何反应。所以,我不知道为什么回调不起作用。根据我的研究,我发现我需要将Focussable
图像按钮设置为false
。正如你在XML文件中看到的那样,我做到了,但是当我点击父行和子行时,我看不到任何响应。
答案 0 :(得分:31)
最后我找到了解决方案:)
我不知道是虫子或疾病还是......
如上所述,基于我的研究,我发现我们需要将图像视图/框的焦点能力设置为“假”。我在XML文件中做到了它并没有用。我将焦点能力设置为XML中的“true”,并在代码中将其设置为false。像这样:
@Override
public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.elv_group, null);
}
TextView tvItem = (TextView) convertView.findViewById(R.id.tvRecipeName);
ImageButton ibDeleteRcipe = (ImageButton) convertView.findViewById(R.id.ibDeleteRecipe);
ibDeleteRcipe.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
...
}
});
ibDeleteRcipe.setFocusable(false);
tvItem.setText(arrGroupElements[groupPosition]);
return convertView;
}
因此,基于我的成就!它应该在不是XML的代码中设置为“false”!现在的问题是有什么区别? - 我不知道。
答案 1 :(得分:3)
有必要在布局xml中为可扩展列表视图项中的可聚焦视图定义android:focusable="false"
,而不是在&#34; ExpandableListView &#34;属性。
例如:如果自定义父列表项包含一个复选框(它将自动获得焦点),它应该如下所示。
<CheckBox
android:id="@+id/cbkSelectDownload"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"/>