1. MyDialog.java

public class MyDialog extends Dialog {    public MyDialog(@NonNull Context context) {        super(context);
        setContentView(R.layout.dialog_layout);
    }
}

2.dialog_layout.xml

<?xml version="1.0" encoding="utf-8"?><android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="300dp"
    android:layout_height="200dp">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="218dp"
        android:layout_height="59dp"
        android:layout_marginTop="84dp"
        android:text="我是定制dialog"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.303"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:text="OK"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/button3"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:text="Cancel"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/button2" /></android.support.constraint.ConstraintLayout>

1. 调用

 MyDialog myDialog = new MyDialog(MainActivity.this);
            myDialog.show();

1. 效果图：

   
   

   

作者：程序园中猿
链接：https://www.jianshu.com/p/d597c7d5c2a1