效果如下
一、与ZoomControls的区别
ZoomControls是一个包含放大、缩小按钮的控件。而ZoomButton是您自己定义的缩放按钮，它允许你定义多个这样的按钮，它显示的只能是图片，没有Text属性。
二、实例
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:andro></LinearLayout>
package com.wjq;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
import android.widget.ZoomButton;
import android.widget.ZoomButtonsController;
import android.widget.ZoomControls;
public class ZoomButtonsControllerDemo extends Activity {
private ZoomButton zb;
private TextView text;
static long size = 12;
/*
* (non-Javadoc)
*
* @see android.app.Activity#onCreate(android.os.Bundle)
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.zoombuttonscontroller);
zb = (ZoomButton) findViewById(R.id.zoombutton);
text = (TextView) findViewById(R.id.text);
zb.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
size = size + 2;
text.setTextSize(size);
}
});
}
}