现需要交换两个控件（本文中是两个RelativeLayout），找到了两个方法：
1、使用LayoutParams改变两个layout的属性，即其相对关系（below等），实现位置的交换，但是并没有交换的动画效果，是“瞬间”交换。
2、使用animation交换控件位置，实现了我需要的动画效果。
如下图，交换layoutOne 与layoutTwo 。
一、首先介绍使用LayoutParams的方法。
<span style="font-size:18px;">package com.exchange;import com.exchange.R;import android.app.Activity;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.RelativeLayout;import android.widget.Toast;/* * Exchange layout with LayoutParams * Author : [email protected] * Date: 2015/7/15 */public class ParamsExchangeActivity extends Activity { private Button btnEx; private LayoutInflater inflater; private RelativeLayout myFirst,mySecond,layoutOne,layoutTwo; //set controls' id , the id is random as you like , do NOT use zero private int btnExId = 11; private int layoutOneId = 12; private int layoutTwoId = 13; //exchange flag , in order to swap back and forth private boolean TAG_firstLayoutTop; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout_main); btnEx=(Button)findViewById(R.id.button_exchange); btnEx.setOnClickListener(new BtnExOnClickListener()); inflater=getLayoutInflater(); TAG_firstLayoutTop = true; //init layoutOne myFirst = (RelativeLayout) inflater.inflate( R.layout.layout_first, null).findViewById(R.id.myFirst); layoutOne = (RelativeLayout)findViewById(R.id.LayoutOne); layoutOne.removeAllViews(); layoutOne.addView(myFirst); //init layoutTwo mySecond = (RelativeLayout) inflater.inflate( R.layout.layout_second, null).findViewById(R.id.mySecond); layoutTwo = (RelativeLayout)findViewById(R.id.LayoutTwo); layoutTwo.removeAllViews(); layoutTwo.addView(mySecond); } public class BtnExOnClickListener implements OnClickListener { @Override public void onClick(View v){ Toast.makeText(getBaseContext(), "exchange!", Toast.LENGTH_SHORT).show(); //set id for controls in order to change their Params btnEx.setId(btnExId); layoutOne.setId(layoutOneId); layoutTwo.setId(layoutTwoId); RelativeLayout.LayoutParams params; if(TAG_firstLayoutTop){ params = (RelativeLayout.LayoutParams)layoutTwo.getLayoutParams(); params.removeRule(RelativeLayout.BELOW); //remove the exist 'BELOW' rule params.addRule(RelativeLayout.BELOW,11); //add a new one 'BELOW' rule,below control NO. 11 layoutTwo.setLayoutParams(params); params = (RelativeLayout.LayoutParams)layoutOne.getLayoutParams(); params.removeRule(RelativeLayout.BELOW); params.addRule(RelativeLayout.BELOW,13); //below control NO. 13 layoutOne.setLayoutParams(params); TAG_firstLayoutTop=false; // change the flag }else{ //vice versa params = (RelativeLayout.LayoutParams)layoutOne.getLayoutParams(); params.removeRule(RelativeLayout.BELOW); params.addRule(RelativeLayout.BELOW,11); layoutOne.setLayoutParams(params); params = (RelativeLayout.LayoutParams)layoutTwo.getLayoutParams(); params.removeRule(RelativeLayout.BELOW); params.addRule(RelativeLayout.BELOW,12); layoutTwo.setLayoutParams(params); TAG_firstLayoutTop=true; } } }}</span>
二、使用animation交换控件
使用animation交换的方法非常简单：
ObjectAnimator.ofFloat(layoutTwo, "TranslationY", -300).setDuration(1000).start(); ObjectAnimator.ofFloat(layoutOne, "TranslationY", 300).setDuration(1000).start();
全部代码如下：
package com.exchange;import android.animation.ObjectAnimator;import android.app.Activity;import android.os.Bundle;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.RelativeLayout;import android.widget.Toast;public class AnimExchangeActivity extends Activity { private Button btnEx; private LayoutInflater inflater; private RelativeLayout myFirst,mySecond,layoutOne,layoutTwo; private boolean TAG_firstLayoutTop; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout_main); btnEx=(Button)findViewById(R.id.button_exchange); btnEx.setOnClickListener(new BtnExOnClickListener()); inflater=getLayoutInflater(); TAG_firstLayoutTop = true; //init layoutOne myFirst = (RelativeLayout) inflater.inflate( R.layout.layout_first, null).findViewById(R.id.myFirst); layoutOne = (RelativeLayout)findViewById(R.id.LayoutOne); layoutOne.removeAllViews(); layoutOne.addView(myFirst); //init layoutTwo mySecond = (RelativeLayout) inflater.inflate( R.layout.layout_second, null).findViewById(R.id.mySecond); layoutTwo = (RelativeLayout)findViewById(R.id.LayoutTwo); layoutTwo.removeAllViews(); layoutTwo.addView(mySecond); } public class BtnExOnClickListener implements OnClickListener { @Override public void onClick(View v){ Toast.makeText(getBaseContext(), "exchange!", Toast.LENGTH_SHORT).show(); if(TAG_firstLayoutTop){ //move upward and downward 300 ObjectAnimator.ofFloat(layoutTwo, "TranslationY", -300).setDuration(1000).start(); ObjectAnimator.ofFloat(layoutOne, "TranslationY", 300).setDuration(1000).start(); TAG_firstLayoutTop = false; }else{ //back to normal position ObjectAnimator.ofFloat(layoutOne, "TranslationY", 0).setDuration(1000).start(); ObjectAnimator.ofFloat(layoutTwo, "TranslationY", 0).setDuration(1000).start(); TAG_firstLayoutTop = true; } } }}源代码下载传送门：稍后补链。
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