下面是一个功能强大的改造的例子：

可以实现以下需求：

1.两个手指进行缩放布局

2.所有子控件也随着缩放，

3.子控件该有的功能不能丢失（像button有可被点击的功能，缩放后不能丢失该功能）

 运行效果图：

 

java代码如下

MainActivity.java:

public class MainActivity extends ActionBarActivity {    private ScaleGestureDetector mScaleGestureDetector = null;    private View view;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        // setContentView(R.layout.test);        view = View.inflate(this, R.layout.activity_main, null);        setContentView(view);                mScaleGestureDetector = new ScaleGestureDetector(this,                new ScaleGestureListener());    }    @Override    public boolean onTouchEvent(MotionEvent event) {        // 返回给ScaleGestureDetector来处理        return mScaleGestureDetector.onTouchEvent(event);    }    public class ScaleGestureListener implements            ScaleGestureDetector.OnScaleGestureListener {        private float scale;        private float preScale = 1;// 默认前一次缩放比例为1        @Override        public boolean onScale(ScaleGestureDetector detector) {            float previousSpan = detector.getPreviousSpan();            float currentSpan = detector.getCurrentSpan();            if (currentSpan < previousSpan) {                // 缩小                // scale = preScale-detector.getScaleFactor()/3;                scale = preScale - (previousSpan - currentSpan) / 1000;            } else {                // 放大                // scale = preScale+detector.getScaleFactor()/3;                scale = preScale + (currentSpan - previousSpan) / 1000;            }            // 缩放view            ViewHelper.setScaleX(view, scale );// x方向上缩小            ViewHelper.setScaleY(view, scale );// y方向上缩小            return false;        }        @Override        public boolean onScaleBegin(ScaleGestureDetector detector) {            // 一定要返回true才会进入onScale()这个函数            return true;        }        @Override        public void onScaleEnd(ScaleGestureDetector detector) {            preScale = scale;//记录本次缩放比例        }    }}

布局文件(activity_main.xml)：

 selector_button1.xml：

selector_button2.xml

  

如果想要整个布局能够移动，可以看下面的帖子：