安卓编写一个圆角并悬浮的底部弹窗，并设置好内部按钮的点击事件

要在Android上编写一个圆角并且悬浮的底部弹窗，并设置内部按钮的点击事件，你可以使用`androidx.constraintlayout.widget.ConstraintLayout`配合`com.google.android.material.bottomsheet.BottomSheetDialog`。以下是一个简单的例子：

首先，你需要在布局文件（比如`pop_up_dialog.xml`）中定义弹窗样式：

<com.google.android.material.bottomsheet.BottomSheetDialog
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/bottomSheetDialog"
    style="@style/MyBottomSheetDialog">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/dialog_rounded_corner_shape"
        app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">

        <!-- 按钮 -->
        <Button
            android:id="@+id/button"
            android:text="点击我"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:background="?attr/colorPrimary"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="parent" />

    </androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.bottomsheet.BottomSheetDialog>

这里设置了底部圆角形状，需要你自己在`dialog_rounded_corner_shape.xml`中定义：

<vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="48dp"
    android:height="48dp"
    android:viewportWidth="48"
    android:viewportHeight="48">
    <!-- 使用路径描述圆角图形，添加边框圆角 -->
    <path
        android:pathData="M24,4 C15.9,4 10,9.9 10,20 c0,10.1 5.9,16 14,16 s14-5.9 14-16 C44,9.9 38.1,4 24,4 z M24,34 C17.7,34 12,28.3 12,22 S17.7,14 24,14 S34,20.7 34,22 C34,28.3 28.3,34 24,34 z"
        android:fillColor="#fff"/>
</vector>

然后，在你的Activity或Fragment中初始化并监听按钮点击事件：

import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.core.app.DialogFeature;
import androidx.core.content.ContextCompat;
import androidx.appcompat.app.AppCompatActivity;
import androidx.constraintlayout.widget.ConstraintSet;
import androidx.lifecycle.LifecycleOwner;
import androidx.viewpager.widget.ViewPager;
import com.google.android.material.bottomsheet.BottomSheetDialog;

public class MainActivity extends AppCompatActivity {

    private BottomSheetDialog mBottomSheetDialog;

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

        // 初始化BottomSheetDialog
        mBottomSheetDialog = BottomSheetDialog.create(this, R.style.MyBottomSheetDialog);
        mBottomSheetDialog.getContentView().findViewById<Button>(R.id.button)
                .setOnClickListener(v -> handleButtonClick());

        // 添加圆角和阴影
        ConstraintSet constraintSet = new ConstraintSet();
        constraintSet.clone(findViewById(ConstraintLayout.class));
        constraintSet.setHorizontalRadius(ViewCompat.getMinimumWidth(findViewById(Button.class)) / 2);
        constraintSet.setVerticalRadius(ViewCompat.getMinimumHeight(findViewById(Button.class)) / 2);
        constraintSet.applyTo(findViewById(ConstraintLayout.class));

        // 其他对话框属性可以根据需求调整，例如设置悬浮或半透明
        mBottomSheetDialog.getWindow().setFeatureInt(DialogFeature.BORDERLESS_BOTTOM_SHEET, true);
        mBottomSheetDialog.getWindow().setBackgroundDrawable(ContextCompat.getDrawable(this, android.R.color.TRANSPARENT));
    }

    private void handleButtonClick() {
        // 点击按钮的逻辑...
    }
}