一个Activity分别加载多个layout布局文件

发布于:2021-10-26 16:52:00

? ?本程序只有一个Activity,首先加载activity_main布局文件。通过点击不同的按钮,分别加载不同的布局文件layout_1、layout_2、layout_3。


? ?activity_main.xml文件如下:






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.horrorkwangmail.a20171208_multilayout.ActivityMain">

android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:text="This is Layout main"
android:textAllCaps="false"
android:textSize="25sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"/>

android:id="@+id/buttonLayout1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
android:text="Layout 1"
android:textAllCaps="false"
app:layout_constraintEnd_toStartOf="@+id/buttonLayout2"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView"
android:onClick="buttonClick"/>

android:id="@+id/buttonLayout2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:text="Layout 2"
android:textAllCaps="false"
app:layout_constraintBottom_toBottomOf="@+id/buttonLayout1"
app:layout_constraintEnd_toStartOf="@+id/buttonLayout3"
app:layout_constraintStart_toEndOf="@+id/buttonLayout1"
app:layout_constraintTop_toTopOf="@+id/buttonLayout1"
android:onClick="buttonClick"/>

android:id="@+id/buttonLayout3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Layout 3"
android:textAllCaps="false"
app:layout_constraintBottom_toBottomOf="@+id/buttonLayout2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/buttonLayout2"
app:layout_constraintTop_toTopOf="@+id/buttonLayout2"
android:onClick="buttonClick"/>





? ? ?layout_1.xml文件如下:







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">

android:id="@+id/buttonBack"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Back to Layout main"
android:textAllCaps="false"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>

android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="30dp"
android:text="This is Layout 1"
android:textSize="25sp"
android:textAllCaps="false"
app:layout_constraintBottom_toTopOf="@+id/buttonBack"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>




layout_2.xml文件如下:




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">

android:id="@+id/buttonBack"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Back to Layout main"
android:textAllCaps="false"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>

android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="30dp"
android:text="This is Layout 2"
android:textSize="25sp"
android:textAllCaps="false"
app:layout_constraintBottom_toTopOf="@+id/buttonBack"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>




layout_3.xml文件如下:





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">

android:id="@+id/buttonBack"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Back to Layout main"
android:textAllCaps="false"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>

android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="30dp"
android:text="This is Layout 3"
android:textSize="25sp"
android:textAllCaps="false"
app:layout_constraintBottom_toTopOf="@+id/buttonBack"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>




strings.xml文件如下:




MultiLayout
Layout main
Layout 1
Layout 2
Layout 3




ActivityMain.java文件如下:




package com.horrorkwangmail.a20171208_multilayout;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class ActivityMain extends AppCompatActivity
{

@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); //首先加载activity_main布局文件
this.setTitle(R.string.layoutMain); //设置标题栏名称
}


public void buttonClick(View v)
{
switch (v.getId())
{
case R.id.buttonLayout1:
setContentView(R.layout.layout_1); //加载layout_1布局文件
this.setTitle(R.string.layout1); //设置标题栏名称

//点击按钮,回到activity_main布局文件
//并设置标题栏名称
Button buttonBack1=findViewById(R.id.buttonBack);
buttonBack1.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
setContentView(R.layout.activity_main);
setTitle(R.string.layoutMain);
}
});
break;
case R.id.buttonLayout2:
setContentView(R.layout.layout_2); //加载layout_2布局文件
this.setTitle(R.string.layout2); //设置标题栏名称

//点击按钮,回到activity_main布局文件
//并设置标题栏名称
Button buttonBack2=findViewById(R.id.buttonBack);
buttonBack2.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
setContentView(R.layout.activity_main);
setTitle(R.string.layoutMain);
}
});
break;
case R.id.buttonLayout3:
setContentView(R.layout.layout_3); //加载layout_3布局文件
this.setTitle(R.string.layout3); //设置标题栏名称

//点击按钮,回到activity_main布局文件
//并设置标题栏名称
Button buttonBack3=findViewById(R.id.buttonBack);
buttonBack3.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View view)
{
setContentView(R.layout.activity_main);
setTitle(R.string.layoutMain);
}
});
break;
default:
break;
}
}


}



真机测试如下:





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