bottomsheetDialog是一種底部彈出的Dialog。今天會實作一個簡單的自定義bottomsheetDialog。
成圖:

dependencies

bottomsheet並非是Android的內建元件，是Google發行的素材包，所以要加入依賴包

    implementation 'com.google.android.material:material:1.2.0-alpha05'

創建roundangle.xml

這個是設置外觀給套用的元件

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">//使用的外型為矩形
            <stroke android:width="1dp" android:color="#000000"/>//邊線寬度為1dp，邊線顏色黑色
            <solid android:color="#E4DFDF" />//邊線內部的顏色為灰色
            //設定左上、左下、右上、右下的圓角角度
            <corners android:radius="10dp" />
        </shape>
    </item>
</selector>

創建bottomsheet.xml

建立一個讓bottomsheetDialog套用的layout

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <LinearLayout
        android:id="@+id/linear"
        android:layout_width="300dp"
        android:layout_height="wrap_content"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:orientation="vertical">
        <TextView
            android:id="@+id/test"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:textColor="#0065FF"
            android:text="BottomSheetDialog"
            android:textSize="30sp"/>
        <Button
            android:id="@+id/cancel"
            android:layout_width="match_parent"
            android:layout_height="65dp"
            android:layout_marginTop="18dp"
            android:layout_marginBottom="24dp"
            android:background="@drawable/roundangle" //此button套用外觀
            android:layout_gravity="center"
            android:text="關閉"
            android:textColor="#0065FF"
            android:textSize="20dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent" />

    </LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

activity_bottom_sheet.xml

新增一個button，透過點擊事件執行bottomsheetDialog

<?xml version="1.0" encoding="utf-8"?>
<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="wrap_content"
    tools:context=".QRcode.BottomSheetActivity">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="OpenBottomSheet"
        android:background="@drawable/roundangle"
        android:text="open"
        android:textSize="20sp"/>
</LinearLayout>

回到BottomSheetActivity

private void BottomSheetSetting() {

        bottomSheetDialog=new BottomSheetDialog(this);//初始化bottomSheetDialog
        view = LayoutInflater.from(this).inflate(R.layout.bottomsheet,null);//套用的layout
        cancel=view.findViewById(R.id.cancel);
        bottomSheetDialog.setContentView(view);//將套用的layout載入到bottomSheetDialog

        cancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(BottomSheetActivity.this,"BottomSheet Cancel",Toast.LENGTH_SHORT).show();
                bottomSheetDialog.dismiss();
            }
        });

    }

點擊事件
bottomSheetDialog.show();就能顯示bottomSheetDialog

    public void OpenBottomSheet(View view) {
        bottomSheetDialog.show();
    }

以上就是今天的內容