web-dev-qa-db-ja.com

ExpandableListViewで展開可能なインジケーターを変更する

ExpandableListViewを作成しようとしています。グループの最初のビューがうまく表示されます。ただし、リスト項目をクリックしても矢印は変わりません。以下の画像をご覧ください。

enter image description here

矢印の方向を変更するにはどうすればよいですか？

レイアウトXML：

  <ExpandableListView
        Android:id="@+id/expandable_list"
        Android:layout_width="fill_parent"
        Android:layout_height="match_parent"            
        Android:divider="@null"
        Android:background="#ffffff"
        Android:groupIndicator="@drawable/settings_selector"
        Android:transcriptMode="alwaysScroll" />

settings_selector.xml：

 <?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:Android="http://schemas.Android.com/apk/res/Android" >

<selector xmlns:Android="http://schemas.Android.com/apk/res/Android" >
    <item
        Android:drawable="@drawable/arrow_down"
        Android:state_empty="true"/>
    <item
        Android:drawable="@drawable/arrow_right"
        Android:state_expanded="true"/>
</selector>

</animation-list>
androidlistviewexpandablelistview
44
NagarjunaReddy

拡張可能なリストビュー

 <ExpandableListView
    Android:id="@+id/expandable_list"
    Android:layout_width="fill_parent"
    Android:layout_height="fill_parent"
    Android:groupIndicator="@drawable/group_indicator"
    Android:transcriptMode="alwaysScroll" />

setindicatorここではiamこのようなsetindicatorコードを使用しています

 DisplayMetrics metrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(metrics);
    int width = metrics.widthPixels; 

 mExpandableList = (ExpandableListView)findViewById(R.id.expandable_list);
 mExpandableList.setIndicatorBounds(width - GetPixelFromDips(50), width - GetPixelFromDips(10));  

   public int GetPixelFromDips(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);
}

res/drawable/group_indicator

  <?xml version="1.0" encoding="utf-8"?>

     <selector xmlns:Android="http://schemas.Android.com/apk/res/Android">            
           <item Android:drawable="@drawable/arrow_right" Android:state_empty="true">  </item>            
           <item Android:drawable="@drawable/arrow_down" Android:state_expanded="true"></item>                
           <item Android:drawable="@drawable/arrow_right"></item>
     </selector>
63
NagarjunaReddy

settings_selector.xml：

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:Android="http://schemas.Android.com/apk/res/Android" >

    <item
        Android:drawable="@drawable/arrow_right"
        Android:state_expanded="true" />

    <item
        Android:drawable="@drawable/arrow_down" />

</selector>
25
Benoit Duffez

以下に進みました。isExpandedフラグに基づいてgroupViewの左/右のドロアブルを決定します。
この方法により、インディケータドロウアブルのパディング/背景およびその他のものをカスタマイズするのが簡単になります。

それが役に立てば幸い。

    public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
            ViewGroup parent) {
        TextView textView = (TextView) mLayoutInflater.inflate(R.layout.menu_group, null);
        textView.setCompoundDrawablesWithIntrinsicBounds(0, 0, isExpanded ? 0 : Android.R.drawable.ic_menu_more, 0);
        textView.setText(getGroup(groupPosition).toString());
        return textView;
    }
15
lily

件名：

    int width = getResources().getDisplayMetrics().widthPixels;
    if (Android.os.Build.VERSION.SDK_INT < Android.os.Build.VERSION_CODES.JELLY_BEAN_MR2) {
        listView.setIndicatorBounds(width - getPixelValue(40), width - getPixelValue(10));
    } else {
        listView.setIndicatorBoundsRelative(width - getPixelValue(40), width - getPixelValue(10));
    }

およびヘルパーメソッド：

public static int getPixelValue(int dp) {

    final float scale = getResources().getDisplayMetrics().density;
    return (int) (dp * scale + 0.5f);
}
4
tier777
import Java.util.ArrayList;

import Android.app.Activity;
import Android.content.Context;
import Android.database.DataSetObserver;
import Android.os.Bundle;
import Android.view.LayoutInflater;
import Android.view.View;
import Android.view.View.OnClickListener;
import Android.view.ViewGroup;
import Android.widget.BaseExpandableListAdapter;
import Android.widget.ExpandableListView;
import Android.widget.TextView;

public class MyActivity extends Activity {

    private ExpandableListView mExpandableList;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);


        mExpandableList = (ExpandableListView)findViewById(R.id.expandable_list);
        mExpandableList.setGroupIndicator(null);
        ArrayList<Parent> arrayParents = new ArrayList<Parent>();
        ArrayList<String> arrayChildren = new ArrayList<String>();

        //here we set the parents and the children
        for (int i = 0; i < 10; i++){
            //for each "i" create a new Parent object to set the title and the children
            Parent parent = new Parent();
            parent.setTitle("Parent " + i);

            arrayChildren = new ArrayList<String>();
            for (int j = 0; j < 10; j++) {
                arrayChildren.add("Child " + j);
            }
            parent.setArrayChildren(arrayChildren);

            //in this array we add the Parent object. We will use the arrayParents at the setAdapter
            arrayParents.add(parent);
        }

        //sets the adapter that provides data to the list.
        mExpandableList.setAdapter(new MyCustomAdapter(MyActivity.this,arrayParents));

    }

    public class Parent {
        private String mTitle;
        private ArrayList<String> mArrayChildren;

        public String getTitle() {
            return mTitle;
        }

        public void setTitle(String mTitle) {
            this.mTitle = mTitle;
        }

        public ArrayList<String> getArrayChildren() {
            return mArrayChildren;
        }

        public void setArrayChildren(ArrayList<String> mArrayChildren) {
            this.mArrayChildren = mArrayChildren;
        }
    }




    public class MyCustomAdapter extends BaseExpandableListAdapter implements OnClickListener{


        private LayoutInflater inflater;
        private ArrayList<Parent> mParent;

        public MyCustomAdapter(Context context, ArrayList<Parent> parent){
            mParent = parent;
            inflater = LayoutInflater.from(context);
        }


        @Override
        //counts the number of group/parent items so the list knows how many times calls getGroupView() method
        public int getGroupCount() {
            return mParent.size();
        }

        @Override
        //counts the number of children items so the list knows how many times calls getChildView() method
        public int getChildrenCount(int i) {
            return mParent.get(i).getArrayChildren().size();
        }

        @Override
        //gets the title of each parent/group
        public Object getGroup(int i) {
            return mParent.get(i).getTitle();
        }

        @Override
        //gets the name of each item
        public Object getChild(int i, int i1) {
            return mParent.get(i).getArrayChildren().get(i1);
        }

        @Override
        public long getGroupId(int i) {
            return i;
        }

        @Override
        public long getChildId(int i, int i1) {
            return i1;
        }

        @Override
        public boolean hasStableIds() {
            return true;
        }

        @Override
        //in this method you must set the text to see the parent/group on the list
        public View getGroupView(int i, boolean b, View view, ViewGroup viewGroup) {

            if (view == null) {
                view = inflater.inflate(R.layout.list_item_parent, viewGroup,false);
            }
            view.findViewById(R.id.button).setTag(i);
            view.findViewById(R.id.button).setOnClickListener(this);
            TextView textView = (TextView) view.findViewById(R.id.list_item_text_view);
            //"i" is the position of the parent/group in the list
            textView.setText(getGroup(i).toString());

            //return the entire view
            return view;
        }

        @Override
        //in this method you must set the text to see the children on the list
        public View getChildView(int i, int i1, boolean b, View view, ViewGroup viewGroup) {
            if (view == null) {
                view = inflater.inflate(R.layout.list_item_child, viewGroup,false);
            }

            TextView textView = (TextView) view.findViewById(R.id.list_item_text_child);
            //"i" is the position of the parent/group in the list and
            //"i1" is the position of the child
            textView.setText(mParent.get(i).getArrayChildren().get(i1));

            //return the entire view
            return view;
        }

        @Override
        public boolean isChildSelectable(int i, int i1) {
            return true;
        }

        @Override
        public void registerDataSetObserver(DataSetObserver observer) {
            /* used to make the notifyDataSetChanged() method work */
            super.registerDataSetObserver(observer);
        }


        /* (non-Javadoc)
         * @see Android.view.View.OnClickListener#onClick(Android.view.View)
         * @since Mar 20, 2013
         * @author rajeshcp 
         */
        @Override
        public void onClick(View v) {
            if(mExpandableList.isGroupExpanded((Integer)v.getTag()))
        {
            mExpandableList.collapseGroup((Integer)v.getTag());
        }else
        {
            mExpandableList.expandGroup((Integer)v.getTag());
        }
        }
    }


}

MyActivityをこのように変更して、他に何が欲しいか教えてください。

4
Triode

グループアイテムのxmlの例で必要な場所にビュー/イメージビューを作成するだけです。

<LinearLayout xmlns:Android="http://schemas.Android.com/apk/res/Android"
Android:id="@+id/parent_group"
Android:layout_width="match_parent"
Android:layout_height="wrap_content"
Android:orientation="horizontal"
Android:padding="10dp">

<ImageView
    Android:id="@+id/expandable_icon"
    Android:layout_width="25dp"
    Android:layout_height="25dp"
    Android:layout_marginTop="6dp"
    Android:src="@drawable/group_icon_not_expanded" />

<TextView
    Android:id="@+id/group_name"
    Android:layout_width="match_parent"
    Android:layout_height="wrap_content"
    Android:layout_gravity="center"
    Android:layout_marginLeft="10dp"
    Android:fontFamily="@font/roboto_thin"
    Android:textColor="@Android:color/black"
    Android:textSize="17sp" />

そして、ExpandableListViewでGroupClickListenerを使用して、ImageViewの画像をプログラムで変更します。例：

listView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
        @Override
        public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
            parent.smoothScrollToPosition(groupPosition);

            if (parent.isGroupExpanded(groupPosition)) {
                ImageView imageView = v.findViewById(R.id.expandable_icon);
                imageView.setImageDrawable(getResources().getDrawable(R.drawable.group_icon_not_expanded));
            } else {
                ImageView imageView = v.findViewById(R.id.expandable_icon);
                imageView.setImageDrawable(getResources().getDrawable(R.drawable.group_icon_expanded));
            }
            return false    ;
        }
    });
1
shadygoneinsane