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                # 1. MaterialButtonToggleGroup 類似于在前端開發中的單選組和復選組的意思。可以將多個`MaterialButton`組和為一個組,控制其操作。 # 2. 屬性 | 屬性 | 描述 | 參數| | --- | --- | --- | | `app:checkedButton` | 默認選中 | 按鈕`ID`| | `app:singleSelection` | 單選| `true`/`false` | | `app:selectionRequired` | 設置為`true`表示至少選中一個 | `true`/`false` | # 3. 案例 ~~~ <com.google.android.material.button.MaterialButtonToggleGroup android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" app:singleSelection="true" app:checkedButton="@id/btn_1" android:id="@+id/group" > <com.google.android.material.button.MaterialButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/btn_1" android:text="Button1" android:textSize="18sp" > </com.google.android.material.button.MaterialButton> <com.google.android.material.button.MaterialButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button2" android:textSize="18sp" > </com.google.android.material.button.MaterialButton> <com.google.android.material.button.MaterialButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button2" android:textSize="18sp" > </com.google.android.material.button.MaterialButton> </com.google.android.material.button.MaterialButtonToggleGroup> ~~~ 當然可以添加點擊響應監聽事件: ~~~ val group = findViewById<MaterialButtonToggleGroup>(R.id.group) group.addOnButtonCheckedListener(object : MaterialButtonToggleGroup.OnButtonCheckedListener{ override fun onButtonChecked( group: MaterialButtonToggleGroup?, checkedId: Int, isChecked: Boolean ) { Log.e("TAG", "Message: $checkedId") } }) ~~~
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