可展开列表视图工作不正常

  expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
        @Override
        public boolean onChildClick(ExpandableListView expandableListView, View view, int i, int i1, long l) {

                final int a = i;
                final int b = i1;

                TextView txtListChild = (TextView) expandableListView.findViewById(R.id.lblListItem);
                ImageView img = (ImageView)expandableListView.findViewById(R.id.img);


                txtListChild.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {

                        Toast.makeText(MainActivity.this, "Starting Music", Toast.LENGTH_SHORT).show();
                        try {
                            String s = mapping.get(headers.get(a));

                            String path = s+"/"+inner.get(headers.get(a)).get(b)+".mp3";

                            Uri myUri = Uri.parse(path);
                            mediaPlayer = new MediaPlayer();
                            mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                            mediaPlayer.setDataSource(getApplicationContext(), myUri);
                            mediaPlayer.prepare();
                            mediaPlayer.start();

                        }
                        catch (Exception e){
                            Log.i("Exception",e.toString());
                        }

                    }
                });

                img.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {

                        Toast.makeText(MainActivity.this, "Stopping Music", Toast.LENGTH_SHORT).show();

                        if(mediaPlayer!=null){
                            mediaPlayer.stop();
                        }

                    }
                });
                return false;
        }
    });

这是我将onChild click listener添加到主活动的代码,并且我的子视图具有 TextView 和一个 ImageView . 只有位置0的孩子能工作,其余的不能。

如果需要任何其他代码段,请在注释中提及。

这是子对象的XML

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="55dip"
android:padding="5dp"
android:layout_margin="5dp"
android:orientation="horizontal" >

<TextView
    android:id="@+id/lblListItem"
    android:layout_width="300dp"
    android:layout_height="wrap_content"
    android:hint="Song Name"
    android:textSize="17sp"
    android:layout_margin="5dp"
    android:padding="5dp"/>

<ImageView
    android:layout_width="50dp"
    android:layout_height="wrap_content"
    android:padding="5dp"
    android:id="@+id/img"
    android:layout_margin="5dp"
    android:src="@drawable/ic_action_name"
    android:layout_alignParentRight="true"/>

</LinearLayout>

适配器代码->

public class ExpandableListAdapter extends BaseExpandableListAdapter {

private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;

public ExpandableListAdapter(Context context, List<String> listDataHeader,//ArrayList<Pojo> list,
                             HashMap<String, List<String>> listChildData) {
    this._context = context;
    this._listDataHeader = listDataHeader;
    this._listDataChild = listChildData;
}


@Override
public int getGroupCount() {
    return this._listDataHeader.size();
}

@Override
public int getChildrenCount(int i) {
    return this._listDataChild.get(this._listDataHeader.get(i)).size();
}

@Override
public Object getGroup(int i) {
    return this._listDataHeader.get(i);
}

@Override
public Object getChild(int i, int i1) {
    return this._listDataChild.get(this._listDataHeader.get(i)).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 false;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded,
                         View convertView, ViewGroup parent) {
    String headerTitle = (String) getGroup(groupPosition);
    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context
                                                                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.heading_expandable, null);
    }

    TextView lblListHeader = (TextView) convertView
                                                .findViewById(R.id.lblListHeader);
    lblListHeader.setTypeface(null, Typeface.BOLD);
    lblListHeader.setText(headerTitle);

    return convertView;
}

@Override
public View getChildView(final int groupPosition, final int childPosition,
                         boolean isLastChild, View convertView, ViewGroup parent) {

    final String childText = (String) getChild(groupPosition, childPosition);

    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) this._context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.list_expandable, null);
    }

    TextView txtListChild = (TextView) convertView.findViewById(R.id.lblListItem);
    ImageView img = (ImageView)convertView.findViewById(R.id.img);
    txtListChild.setText(childText);

    return convertView;
}

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