创建自定义控件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/title_bg">

    <Button
        android:id="@+id/title_back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_margin="5dp"
        android:background="@drawable/back_bg"
        android:text="Back"
        android:textColor="#fff"/>

    <TextView
        android:id="@+id/title_text"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_weight="1"
        android:gravity="center"
        android:text="Title Text"
        android:textColor="#fff"
        android:textSize="24sp"/>
    <Button
        android:id="@+id/title_edit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_margin="5dp"
        android:background="@drawable/edit_bg"
        android:text="Edit"
        android:textColor="#fff"/>

</LinearLayout>

public class TitleLayout extends LinearLayout {
    public TitleLayout(Context context, AttributeSet attrs){
        super(context, attrs);
        LayoutInflater.from(context).inflate(R.layout.title, this);
    }
}

public class TitleLayout extends LinearLayout {
    public TitleLayout(Context context, AttributeSet attrs){
        super(context, attrs);
        LayoutInflater.from(context).inflate(R.layout.title, this);
        Button titleBack = findViewById(R.id.title_back);
        Button titleEdit = findViewById(R.id.title_edit);
        titleBack.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                ((Activity)getContext()).finish();
            }
        });
        titleEdit.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(getContext(), "You clicked Edit button", Toast.LENGTH_SHORT).show();
            }
        });
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.example.uilayouttest.TitleLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>