Android AS创建自定义布局案例详解

<linearlayout
    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"
    android:background="@drawable/ic_launcher_foreground"
    >
<!--background可以放图片，放了合适的图片比较好看，这里我比较随意点，没找到资源-->
    <button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/title_back"
        android:layout_margin="5dp"
        android:background="@drawable/ic_launcher_background"
        android:text="@string/back"
        android:textcolor="#fff"/>
    
    <textview
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:id="@+id/title_text"
        android:layout_weight="1"
        android:gravity="center"
        android:text="this is a title"
        android:textcolor="#f44336"
        android:textsize="24sp"
        tools:ignore="hardcodedtext"/>

    <button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/title_edit"
        android:layout_margin="5dp"
        android:background="@drawable/ic_launcher_background"
        android:text="edit"
        android:textcolor="#fff"
        tools:ignore="hardcodedtext" />

<linearlayout
    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">
	<!--酷似c++调用库-->
    <include layout="@layout/title"/>


</linearlayout>

import androidx.appcompat.app.actionbar;
import androidx.appcompat.app.appcompatactivity;

import android.os.bundle;


public class mainactivity extends appcompatactivity {

    @override
    protected void oncreate(bundle savedinstancestate) {
        super.oncreate(savedinstancestate);
        setcontentview(r.layout.activity_main);
        actionbar actionbar=getsupportactionbar();
        if(actionbar!=null)
            actionbar.hide();//将标题栏隐藏起来


    }
}