On 4 Lut, 21:07, saex <[email protected]> wrote:
> public class CustomExpandableListAdapter extends BaseExpandableListAdapter
package org.abc.def;
import java.util.Random;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Handler.Callback;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.TextView;
public class ExpandableListActivity extends Activity implements
Callback {
private final static String TAG = "ExpandableListActivity";
private Handler mHandler;
private Adapter mAdapter;
private Random mRandom;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.elv);
ExpandableListView elv = (ExpandableListView)
findViewById(R.id.elv);
mHandler = new Handler(this);
mAdapter = new Adapter(this, elv);
elv.setAdapter(mAdapter);
elv.expandGroup(0);
elv.expandGroup(1);
mRandom = new Random();
}
@Override
protected void onResume() {
super.onResume();
mHandler.sendEmptyMessage(0);
}
@Override
protected void onPause() {
super.onPause();
mHandler.removeMessages(0);
}
@Override
public boolean handleMessage(Message msg) {
mHandler.sendEmptyMessageDelayed(0, 500);
int idx = mRandom.nextInt(mAdapter.getGroupCount());
mAdapter.update(idx);
return true;
}
static class Adapter extends BaseExpandableListAdapter {
int[] mValues = new int[5];
private ExpandableListView mElv;
private LayoutInflater mInflater;
public Adapter(Context context, ExpandableListView elv) {
mElv = elv;
mInflater =
(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public void update(int idx) {
mValues[idx]++;
int first = mElv.getFirstVisiblePosition();
int last = mElv.getLastVisiblePosition();
// TODO: maybe its better to use: cnt =
mElv.getChildCount();
int cnt = last - first + 1;
Log.d(TAG, "update cnt: " + cnt + ", getChildCount(): "
+
mElv.getChildCount());
String tag = Integer.toString(idx);
for (int i = 0; i < cnt; i++) {
View v = mElv.getChildAt(i);
if (tag.equals(v.getTag())) {
getChildView(idx, 0, false, v, mElv);
break;
}
}
}
@Override
public int getGroupCount() {
return mValues.length;
}
@Override
public int getChildrenCount(int groupPosition) {
return 1;
}
@Override
public Object getGroup(int groupPosition) {
return mValues[groupPosition];
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return mValues[groupPosition];
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View
convertView, ViewGroup parent) {
View v = convertView != null? convertView :
mInflater.inflate(android.R.layout.simple_expandable_list_item_1,
parent, false);
TextView tv = (TextView)
v.findViewById(android.R.id.text1);
tv.setText("Group #" + groupPosition);
v.setTag("");
return v;
}
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
View v = convertView != null? convertView :
mInflater.inflate(android.R.layout.simple_expandable_list_item_1,
parent, false);;
TextView tv = (TextView)
v.findViewById(android.R.id.text1);
tv.setText(Integer.toString(mValues[groupPosition]));
v.setTag(Integer.toString(groupPosition));
return v;
}
@Override
public boolean isChildSelectable(int groupPosition, int
childPosition) {
return false;
}
}
}
see update(int) method in my adapter, its called every half of second
and updates directly ExpandableListView
pskink
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