##上图
ConstraintUtil.java
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 * 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); } }} 使用
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(); }