Android studio 约束布局嵌套 - > 点击按钮 - > 隐藏布局

今天先要解决的问题是怎么样点击按钮（点击啥玩意儿都行）来隐藏掉页面的部分布局

用的是 ConstraintLayout 约束布局，其实他的嵌套子布局就是ConstraintLayout里面再加ConstraintLayout........

至于隐藏其实就是Visibility的可见性，因为我想要的就是点击按钮隐藏这一部分的布局，之后还要点回来，所以我用的是

ConstraintLayout off=findViewById(R.id.off); //off是我的嵌套布局的ID

off.setVisibility(View.INVISIBLE)   //就是说把这个隐藏，但是它还是占位置的

【1】布局文件

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">


    <TextView
        android:layout_width="129dp"
        android:layout_height="60dp"
        android:lineSpacingExtra="27dp"
        android:text="demo"
        android:textColor="#F87461"
        android:textSize="40sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.501"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.076" />


    <TextView
        android:layout_width="89dp"
        android:layout_height="39dp"
        android:lineSpacingExtra="27dp"
        android:text="设定时间"
        android:textColor="#ff333333"
        android:textSize="18sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.159"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.242" />

    <Button
        android:id="@+id/sendbutton2"
        android:layout_width="81dp"
        android:layout_height="34dp"
        android:background="@drawable/button1"
        android:lineSpacingExtra="17dp"
        android:onClick="onclick2"
        android:text="close"
        android:textColor="#FFFFFF"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.894"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.225" />


    <View
        android:layout_width="292dp"
        android:layout_height="1dp"
        android:layout_marginStart="32dp"
        android:background="@android:color/darker_gray"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.47"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.323"
        android:layout_marginLeft="32dp" />


    <android.support.constraint.ConstraintLayout 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:id="@+id/off"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="visible"
        tools:ignore="MissingConstraints"
        tools:layout_editor_absoluteX="0dp"
        tools:layout_editor_absoluteY="56dp">


        <TextView
            android:layout_width="136dp"
            android:layout_height="52dp"
            android:lineSpacingExtra="27dp"
            android:text="开始时间"
            android:textColor="#999999"
            android:textSize="25sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintHorizontal_bias="0.181"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.444" />


        <TextView
            android:layout_width="111dp"
            android:layout_height="46dp"
            android:lineSpacingExtra="27dp"
            android:text="结束时间"
            android:textColor="#999999"
            android:textSize="25sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintHorizontal_bias="0.164"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.65" />

        <ImageView
            android:layout_width="157dp"
            android:layout_height="165dp"
            android:background="@drawable/hhh"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintHorizontal_bias="0.85"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.547" />

        <Button
            android:id="@+id/sendbutton1"
            android:layout_width="295dp"
            android:layout_height="37dp"
            android:background="@drawable/press"
            android:lineSpacingExtra="17dp"
            android:onClick="onclick1"
            android:text="确定"
            android:textColor="#FFFFFF"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintHorizontal_bias="0.505"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.822" />


    </android.support.constraint.ConstraintLayout>


</android.support.constraint.ConstraintLayout>

【2】activity

import android.content.DialogInterface;
import android.os.Bundle;
import android.support.constraint.ConstraintLayout;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;


public class MainActivity extends AppCompatActivity  {

    @Override
    public void onCreate( Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void onclick2(View view)
    {
        ConstraintLayout off=findViewById(R.id.off);
        off.setVisibility(View.INVISIBLE);
    }

    public void onclick1(View view)
    {
        AlertDialog.Builder builder=new AlertDialog.Builder(this);
        builder.setTitle("已成功修改时间");//设置对话框的标题
        builder.setNegativeButton("返回", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {

            }
        });
        AlertDialog b=builder.create();
        b.show();
    }

}

【3】效果图

点击按钮后下面的布局隐藏了