Java代码动态修改 ConstraintLayout 内控件布局的辅助类

import android.support.annotation.IdRes;
import android.support.constraint.ConstraintLayout;
import android.support.constraint.ConstraintSet;
import android.transition.TransitionManager;

/**
* Created by xiaolei on 2017/9/8.
*/

public class ConstraintUtil
{
private ConstraintLayout constraintLayout;
private ConstraintBegin begin;
private ConstraintSet applyConstraintSet = new ConstraintSet();
private ConstraintSet resetConstraintSet = new ConstraintSet();

public ConstraintUtil(ConstraintLayout constraintLayout)
{
this.constraintLayout = constraintLayout;
resetConstraintSet.clone(constraintLayout);
}

/**
* 开始修改
* @return
*/
public ConstraintBegin begin()
{
synchronized (ConstraintBegin.class)
{
if (begin == null)
{
begin = new ConstraintBegin();
}
}
applyConstraintSet.clone(constraintLayout);
return begin;
}

/**
* 带动画的修改
* @return
*/
public ConstraintBegin beginWithAnim()
{
TransitionManager.beginDelayedTransition(constraintLayout);
return begin();
}

/**
* 重置
*/
public void reSet()
{
resetConstraintSet.applyTo(constraintLayout);
}

/**
* 带动画的重置
*/
public void reSetWidthAnim()
{
TransitionManager.beginDelayedTransition(constraintLayout);
resetConstraintSet.applyTo(constraintLayout);
}

public class ConstraintBegin
{
/**
* 清除关系<br/>
* 注意：这里不仅仅会清除关系，还会清除对应控件的宽高为 w:0,h:0
* @param viewIds
* @return
*/
public ConstraintBegin clear(@IdRes int... viewIds)
{
for (int viewId : viewIds)
{
applyConstraintSet.clear(viewId);
}
return this;
}

/**
* 清除某个控件的，某个关系
* @param viewId
* @param anchor
* @return
*/
public ConstraintBegin clear(int viewId,int anchor)
{
applyConstraintSet.clear(viewId,anchor);
return this;
}
/**
* 为某个控件设置 margin
* @param viewId 某个控件ID
* @param left marginLeft
* @param top   marginTop
* @param right marginRight
* @param bottom marginBottom
* @return
*/
public ConstraintBegin setMargin(@IdRes int viewId, int left, int top, int right, int bottom)
{
setMarginLeft(viewId,left);
setMarginTop(viewId,top);
setMarginRight(viewId,right);
setMarginBottom(viewId,bottom);
return this;
}

/**
* 为某个控件设置 marginLeft
* @param viewId 某个控件ID
* @param left marginLeft
* @return
*/
public ConstraintBegin setMarginLeft(@IdRes int viewId, int left)
{
applyConstraintSet.setMargin(viewId, ConstraintSet.LEFT, left);
return this;
}

/**
* 为某个控件设置 marginRight
* @param viewId 某个控件ID
* @param right marginRight
* @return
*/
public ConstraintBegin setMarginRight(@IdRes int viewId, int right)
{
applyConstraintSet.setMargin(viewId, ConstraintSet.RIGHT, right);
return this;
}

/**
* 为某个控件设置 marginTop
* @param viewId 某个控件ID
* @param top marginTop
* @return
*/
public ConstraintBegin setMarginTop(@IdRes int viewId, int top)
{
applyConstraintSet.setMargin(viewId, ConstraintSet.TOP, top);
return this;
}

/**
* 为某个控件设置marginBottom
* @param viewId 某个控件ID
* @param bottom marginBottom
* @return
*/
public ConstraintBegin setMarginBottom(@IdRes int viewId, int bottom)
{
applyConstraintSet.setMargin(viewId, ConstraintSet.BOTTOM, bottom);
return this;
}

/**
* 为某个控件设置关联关系 left_to_left_of
* @param startId
* @param endId
* @return
*/
public ConstraintBegin Left_toLeftOf(@IdRes int startId, @IdRes int endId)
{
applyConstraintSet.connect(startId, ConstraintSet.LEFT, endId, ConstraintSet.LEFT);
return this;
}

/**
* 为某个控件设置关联关系 left_to_right_of
* @param startId
* @param endId
* @return
*/
public ConstraintBegin Left_toRightOf(@IdRes int startId, @IdRes int endId)
{
applyConstraintSet.connect(startId, ConstraintSet.LEFT, endId, ConstraintSet.RIGHT);
return this;
}

/**
* 为某个控件设置关联关系 top_to_top_of
* @param startId
* @param endId
* @return
*/
public ConstraintBegin Top_toTopOf(@IdRes int startId, @IdRes int endId)
{
applyConstraintSet.connect(startId, ConstraintSet.TOP, endId, ConstraintSet.TOP);
return this;
}

/**
* 为某个控件设置关联关系 top_to_bottom_of
* @param startId
* @param endId
* @return
*/
public ConstraintBegin Top_toBottomOf(@IdRes int startId, @IdRes int endId)
{
applyConstraintSet.connect(startId, ConstraintSet.TOP, endId, ConstraintSet.BOTTOM);
return this;
}
/**
* 为某个控件设置关联关系 right_to_left_of
* @param startId
* @param endId
* @return
*/
public ConstraintBegin Right_toLeftOf(@IdRes int startId, @IdRes int endId)
{
applyConstraintSet.connect(startId, ConstraintSet.RIGHT, endId, ConstraintSet.LEFT);
return this;
}
/**
* 为某个控件设置关联关系 right_to_right_of
* @param startId
* @param endId
* @return
*/
public ConstraintBegin Right_toRightOf(@IdRes int startId, @IdRes int endId)
{
applyConstraintSet.connect(startId, ConstraintSet.RIGHT, endId, ConstraintSet.RIGHT);
return this;
}
/**
* 为某个控件设置关联关系 bottom_to_bottom_of
* @param startId
* @param endId
* @return
*/
public ConstraintBegin Bottom_toBottomOf(@IdRes int startId, @IdRes int endId)
{
applyConstraintSet.connect(startId, ConstraintSet.BOTTOM, endId, ConstraintSet.BOTTOM);
return this;
}

/**
* 为某个控件设置关联关系 bottom_to_top_of
* @param startId
* @param endId
* @return
*/
public ConstraintBegin Bottom_toTopOf(@IdRes int startId, @IdRes int endId)
{
applyConstraintSet.connect(startId, ConstraintSet.BOTTOM, endId, ConstraintSet.TOP);
return this;
}

/**
* 为某个控件设置宽度
* @param viewId
* @param width
* @return
*/
public ConstraintBegin setWidth(@IdRes int viewId, int width)
{
applyConstraintSet.constrainWidth(viewId, width);
return this;
}

/**
* 某个控件设置高度
* @param viewId
* @param height
* @return
*/
public ConstraintBegin setHeight(@IdRes int viewId, int height)
{
applyConstraintSet.constrainHeight(viewId, height);
return this;
}

/**
* 提交应用生效
*/
public void commit()
{
applyConstraintSet.applyTo(constraintLayout);
}
}
}

public void onApplyClick(View view)
{
constraintUtil = new ConstraintUtil(constraintLayout);
ConstraintUtil.ConstraintBegin begin = constraintUtil.beginWithAnim();

begin.clear(R.id.button1,R.id.button2,R.id.button3);

begin.Left_toLeftOf(R.id.button1,R.id.main);
begin.Left_toRightOf(R.id.button2,R.id.button1);
begin.Right_toLeftOf(R.id.button2,R.id.button3);
begin.Right_toRightOf(R.id.button3,R.id.main);

begin.setWidth(R.id.button1, ConstraintSet.WRAP_CONTENT);
begin.setWidth(R.id.button2, ConstraintSet.WRAP_CONTENT);
begin.setWidth(R.id.button3, ConstraintSet.WRAP_CONTENT);
begin.setHeight(R.id.button1, ConstraintSet.WRAP_CONTENT);
begin.setHeight(R.id.button2, ConstraintSet.WRAP_CONTENT);
begin.setHeight(R.id.button3, ConstraintSet.WRAP_CONTENT);

begin.commit();
}