Coordinator Layout 의 사용 은 이렇게 간단 합 니 다(Android)

/**
*   child       dependency
*/
 @Override
 public boolean layoutDependsOn(CoordinatorLayout parent, T child, View dependency) {
 boolean rs;
 //      rs   
 //  false  child   dependency，ture    
 return rs; 
}

/**
*  dependency     （  、   ），      
*   true  child             ，     false
*/
@Override
public boolean onDependentViewChanged(CoordinatorLayout parent, T child, View dependency) {
  //child        
  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) {
  //  dependency TempView   ，           Dependency
  return dependency instanceof TempView;
 }

 //  dependency      ，    onDependentViewChanged  
 @Override
 public boolean onDependentViewChanged(CoordinatorLayout parent, Button btn, View dependency) {

  //  dependency   ，  Button   

  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>