NekoX/TMessagesProj/src/main/java/org/telegram/ui/Views/LayoutListView.java

60 lines
1.8 KiB
Java

/*
* This is the source code of Telegram for Android v. 1.3.2.
* It is licensed under GNU GPL v. 2 or later.
* You should have received a copy of the license in this archive (see LICENSE).
*
* Copyright Nikolai Kudashov, 2013.
*/
package org.telegram.ui.Views;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ListView;
public class LayoutListView extends ListView {
private int height = -1;
public LayoutListView(Context context) {
super(context);
}
public LayoutListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public LayoutListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
View v = getChildAt(getChildCount() - 1);
if (v != null && height > 0 && changed && ((bottom - top) < height)) {
int b = height - v.getTop();
final int scrollTo = getLastVisiblePosition();
super.onLayout(changed, left, top, right, bottom);
final int offset = (bottom - top) - b;
post(new Runnable() {
@Override
public void run() {
try {
setSelectionFromTop(scrollTo, offset - getPaddingTop());
} catch (Exception e) {
e.printStackTrace();
}
}
});
} else {
try {
super.onLayout(changed, left, top, right, bottom);
} catch (Exception e) {
e.printStackTrace();
}
}
height = (bottom - top);
}
}