java – 如何在不折叠的情况下将ExpandableListView放入ScrollView？
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我想在ScrollView中使用ExpandableListView和其他视图,但我遇到了ExpandableListView中的自动滚动问题,我试图禁用它,但问题在于ExpandableListView的高度及其内部的布局.
所以我想
>禁用ExpandableListView滚动
>调整ExpandableListView&的大小包含groupView时包含的LinearLayout
我搜索了一个解决方案,我找到了一个仅适用于ListView的解决方案
我想使用ExpandableListView(使用自定义适配器)进行相同的锻炼.
这是我的代码：
MainActivity.java
package fablabegypt.android.expandablelistview2;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ExpandableListView;
import android.widget.LinearLayout;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class MainActivity extends ActionBarActivity {
mListAdapter listAdapter;
ExpandableListView expListView;
LinearLayout linearLayout;
List<String> listDataHeader;
HashMap<String, List<String>> listDataChild;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
linearLayout = (LinearLayout) findViewById(R.id.linear_holder);
prepareListData();
expListView = (ExpandableListView) findViewById(R.id.expand_list);
//expListView.setScrollContainer(false);
expListView.setHorizontalScrollBarEnabled(false);
expListView.setVerticalScrollBarEnabled(false);
expListView.setFastScrollEnabled(false);
expListView.setSmoothScrollbarEnabled(false);
//expListView.setOverscrollHeader(null);
expListView.setFooterDividersEnabled(false);
//expListView.setOverscrollFooter(null);
//expListView.setVerticalFadingEdgeEnabled(false);
//expListView.setHorizontalFadingEdgeEnabled(false);
expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
return true;
}
});
expListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
if (parent.isGroupExpanded(groupPosition)) {
parent.collapseGroup(groupPosition);
} else {
parent.expandGroup(groupPosition);
}
//telling the listView we have handled the group click, and don't want the default actions.
return true;
}
});
expListView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
return false;
}else {
}
return true;
}
});
listAdapter = new mListAdapter(this, listDataHeader,listDataChild);
expListView.setAdapter(listAdapter);
}
private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
// Adding child data
listDataHeader.add("Top 250");
listDataHeader.add("Now Showing");
listDataHeader.add("Coming Soon..");
// Adding child data
List<String> top250 = new ArrayList<String>();
top250.add("The Shawshank Redemption");
top250.add("The Godfather");
top250.add("The Godfather: Part II");
top250.add("Pulp Fiction");
top250.add("The Good, the Bad and the Ugly");
top250.add("The Dark Knight");
top250.add("12 Angry Men");
List<String> nowShowing = new ArrayList<String>();
nowShowing.add("The Conjuring");
nowShowing.add("Despicable Me 2");
nowShowing.add("Turbo");
nowShowing.add("Grown Ups 2");
nowShowing.add("Red 2");
nowShowing.add("The Wolverine");
List<String> comingSoon = new ArrayList<String>();
comingSoon.add("2 Guns");
comingSoon.add("The Smurfs 2");
comingSoon.add("The Spectacular Now");
comingSoon.add("The Canyons");
comingSoon.add("Europa Report");
listDataChild.put(listDataHeader.get(0), top250); // Header, Child data
listDataChild.put(listDataHeader.get(1), nowShowing);
listDataChild.put(listDataHeader.get(2), comingSoon);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
}
mListAdapter.java
package fablabegypt.android.expandablelistview2;
import android.content.Context;
import android.database.DataSetObserver;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListAdapter;
import android.widget.TextView;
import java.util.HashMap;
import java.util.List;
/**
* Created by Mouso on 4/27/2015.
*/
public class mListAdapter extends BaseExpandableListAdapter {
private Context context;
private List<String> header_list;
private HashMap<String, List<String>> children_data_list;
public mListAdapter(Context context,List<String> header_list,HashMap<String,List<String>> children_data_list){
this.context = context;
this.header_list = header_list;
this.children_data_list = children_data_list;
}
@Override
public void registerDataSetObserver(DataSetObserver observer) {
}
@Override
public void unregisterDataSetObserver(DataSetObserver observer) {
}
@Override
public int getGroupCount() {
return this.children_data_list.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return this.children_data_list.get(this.header_list.get(groupPosition)).size();
}
@Override
public Object getGroup(int groupPosition) {
return this.header_list.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return this.children_data_list.get(this.header_list.get(groupPosition)).get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
final String headerText = (String) getGroup(groupPosition);
if (convertView == null){
LayoutInflater layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.list_group,null);
}
TextView headerTxt = (TextView) convertView.findViewById(R.id.list_group_txt);
headerTxt.setTextSize(20);
headerTxt.setText(headerText);
//Log.d("Mouso",headerText);
return convertView;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition,childPosition);
if (convertView == null){
LayoutInflater layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.list_item,null);
}
TextView childTxt = (TextView) convertView.findViewById(R.id.list_child_txt);
childTxt.setText(childText);
return convertView;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
@Override
public boolean areAllItemsEnabled() {
return true;
}
@Override
public boolean isEmpty() {
if (header_list.size() > 0)
return true;
return false;
}
@Override
public void onGroupExpanded(int groupPosition) {
}
@Override
public void onGroupCollapsed(int groupPosition) {
}
@Override
public long getCombinedChildId(long groupId, long childId) {
return (groupId*100)+childId;
}
@Override
public long getCombinedGroupId(long groupId) {
return groupId;
}
}
activity_main.xml中
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<ScrollView
android:layout_width="wrap_content"
android:layout_height="500px"
android:fillViewport="true">
<LinearLayout
android:id="@+id/linear_holder"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/txt"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="we 7yat 3neak we fadaha 3neya \n\n\n dana ba7ebak ad 3naya"/>
<ExpandableListView
android:id="@+id/expand_list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:isScrollContainer="false">
</ExpandableListView>
</LinearLayout>
</ScrollView>
</RelativeLayout>
list_group.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/list_group_txt"
android:paddingLeft="?android:attr/expandableListPreferredItemPaddingLeft"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/list_child_txt"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
我试图推动锻炼
Helper.java
package fablabegypt.android.expandablelistview2;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ListAdapter;
import android.widget.ListView;
/**
* Created by Mouso on 4/29/2015.
*/
public class ListViewHelper {
public static void getListViewSize(ExpandableListView myListView) {
ListAdapter myListAdapter = myListView.getAdapter();
if (myListAdapter == null) {
//do nothing return null
return;
}
//set listAdapter in loop for getting final size
int totalHeight = 0;
for (int groupSize = 0; groupSize < myListAdapter.getGroupCount(); groupSize++) {
View listItem = myListAdapter.getGroupView(groupSize, false, null, myListView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
for (int size = 0; size < myListAdapter.getChildrenCount(groupSize); size++) {
if (size == myListAdapter.getChildrenCount(groupSize)-1)
listItem = myListAdapter.getChildView(groupSize, size, true, null, myListView);
listItem = myListAdapter.getChildView(groupSize, size, false, null, myListView);
listItem.measure(0, 0);
totalHeight += listItem.getMeasuredHeight();
}
}
//setting listview item in adapter
ViewGroup.LayoutParams params = myListView.getLayoutParams();
params.height = totalHeight + (myListView.getDividerHeight() * (myListAdapter.getGroupCount() - 1));
myListView.setLayoutParams(params);
// print height of adapter on log
Log.d("mouso", "height of listItem:"+String.valueOf(totalHeight));
}
//Read more: http://www.androidhub4you.com/2012/12/listview-into-scrollview-in-android.html#ixzz3Yh4m4MPG
}
解决方法:
在具有滚动功能的另一个视图中放置具有自己的滚动功能的视图总是一个非常糟糕的主意.这可能导致触摸操作被错误的视图,糟糕的性能等拦截.此外,从您的主布局中,除了使用列表视图进行TextView滚动之外,您似乎没有使用ScrollView.为什么不将它添加为标题视图？ expListView.setHeaderView(View)并将textview扩展到其中.
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