使用Android kotlin 语言，适配Android12 版本，生成一个Fragment,实现滑动水平进度条，改变屏幕亮度

好的，下面是实现的步骤：

1. 在build.gradle文件中添加以下依赖：

implementation 'com.google.android.material:material:1.4.0'

2. 创建一个新的Fragment类，并在布局文件中添加一个HorizontalSeekBar：

class BrightnessFragment : Fragment() {
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        val view = inflater.inflate(R.layout.fragment_brightness, container, false)
        val seekBar = view.findViewById<SeekBar>(R.id.seek_bar)
        seekBar.max = 255
        seekBar.progress = Settings.System.getInt(
            requireActivity().contentResolver,
            Settings.System.SCREEN_BRIGHTNESS
        )
        seekBar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
            override fun onProgressChanged(seekBar: SeekBar?, progress: Int, fromUser: Boolean) {
                if (fromUser) {
                    val layoutParams = requireActivity().window.attributes
                    layoutParams.screenBrightness = progress / 255f
                    requireActivity().window.attributes = layoutParams
                    Settings.System.putInt(
                        requireActivity().contentResolver,
                        Settings.System.SCREEN_BRIGHTNESS,
                        progress
                    )
                }
            }

            override fun onStartTrackingTouch(seekBar: SeekBar?) {}

            override fun onStopTrackingTouch(seekBar: SeekBar?) {}
        })
        return view
    }
}

3. 在布局文件fragment_brightness.xml中添加一个HorizontalSeekBar：

<SeekBar
    android:id="@+id/seek_bar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="16dp"
    android:progressDrawable="@drawable/seekbar_progress"
    android:thumb="@drawable/seekbar_thumb"
    app:layout_constraintTop_toTopOf="parent" />

4. 在drawable文件夹中添加2个xml文件，用于设置SeekBar的样式：

seekbar_progress.xml：

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background">
        <shape>
            <corners android:radius="4dp" />
            <solid android:color="#EDEDED" />
        </shape>
    </item>
    <item android:id="@android:id/progress">
        <clip>
            <shape>
                <corners android:radius="4dp" />
                <solid android:color="@color/colorPrimary" />
            </shape>
        </clip>
    </item>
</layer-list>

seekbar_thumb.xml：

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <size android:width="24dp" android:height="24dp" />
    <solid android:color="@color/colorPrimary" />
</shape>

5. 在MainActivity中将BrightnessFragment添加到ViewPager中：

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val viewPager = findViewById<ViewPager2>(R.id.view_pager)
        val adapter = PagerAdapter(this)
        adapter.addFragment(BrightnessFragment())
        viewPager.adapter = adapter
    }
}

现在运行应用，你会看到一个水平的SeekBar，通过滑动可以改变屏幕的亮度。