/**
* 判斷child的布局是否依賴dependency
*/
 @Override
 public boolean layoutDependsOn(CoordinatorLayout parent, T child, View dependency) {
 boolean rs;
 //根據(jù)邏輯判斷rs的取值
 //返回false表示child不依賴dependency，ture表示依賴
 return rs; 
}

/**
* 當(dāng)dependency發(fā)生改變時(shí)（位置、寬高等），執(zhí)行這個(gè)函數(shù)
* 返回true表示child的位置或者是寬高要發(fā)生改變，否則就返回false
*/
@Override
public boolean onDependentViewChanged(CoordinatorLayout parent, T child, View dependency) {
  //child要執(zhí)行的具體動(dòng)作
  return true;
}

package com.hc.studyCoordinatorLayout;

import android.content.Context;
import android.support.design.widget.CoordinatorLayout;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.View;
import android.widget.Button;

/**
 * Package com.hc.studyCoordinatorLayout
 * Created by HuaChao on 2016/6/1.
 */
public class MyBehavior extends CoordinatorLayout.Behavior<Button> {
 private int width;

 public MyBehavior(Context context, AttributeSet attrs) {
  super(context, attrs);
  DisplayMetrics display = context.getResources().getDisplayMetrics();
  width = display.widthPixels;
 }

 @Override
 public boolean layoutDependsOn(CoordinatorLayout parent, Button child, View dependency) {
  //如果dependency是TempView的實(shí)例，說(shuō)明它就是我們所需要的Dependency
  return dependency instanceof TempView;
 }

 //每次dependency位置發(fā)生變化，都會(huì)執(zhí)行onDependentViewChanged方法
 @Override
 public boolean onDependentViewChanged(CoordinatorLayout parent, Button btn, View dependency) {

  //根據(jù)dependency的位置，設(shè)置Button的位置

  int top = dependency.getTop();
  int left = dependency.getLeft();

  int x = width - left - btn.getWidth();
  int y = top;

  setPosition(btn, x, y);
  return true;
 }

 private void setPosition(View v, int x, int y) {
  CoordinatorLayout.MarginLayoutParams layoutParams = (CoordinatorLayout.MarginLayoutParams) v.getLayoutParams();
  layoutParams.leftMargin = x;
  layoutParams.topMargin = y;
  v.setLayoutParams(layoutParams);
 }


}

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:app="http://schemas.android.com/apk/res-auto"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="com.hc.studyCoordinatorLayout.MainActivity">

 <Button
  android:id="@+id/btn"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginLeft="300dp"
  android:layout_marginTop="300dp"
  android:background="#FFCC00"
  android:text="Hello"
  app:layout_behavior="com.hc.studyCoordinatorLayout.MyBehavior" />

 <com.hc.studyCoordinatorLayout.TempView
  android:layout_width="100dp"
  android:layout_height="100dp"
  android:layout_marginLeft="300dp"
  android:layout_marginTop="300dp"
  android:background="#3366CC" />
</android.support.design.widget.CoordinatorLayout>