android - 如何管理可折叠 Android 设备活动中配置更改的不同布局？

Question

为可折叠设备创建了一个演示。当设备折叠时，我想显示一种布局，当设备展开时，我有不同的布局要显示。那么如何根据配置更改来管理两种布局。？

override fun onConfigurationChanged(newConfig: Configuration) {
        super.onConfigurationChanged(newConfig)
        Log.i(myTag, "onConfigurationChanged...")
}

Answer 1

您可以设置回调以接收状态：CLOSED、HALF、OPEN。

private fun setFoldableCallbacks() {
        mainThreadExecutor = ContextCompat.getMainExecutor(this)
        windowManager = WindowManager(this, null)
        windowManager.registerDeviceStateChangeCallback(
            mainThreadExecutor,
            deviceStateChangeCallback
        )
        Handler(Looper.getMainLooper()).postDelayed({
            windowManager.registerLayoutChangeCallback(mainThreadExecutor, layoutChangeCallback)
        }, 1000)
    }

Answer 2

  if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
          setcontentview();
} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
            setcontentview();
}

看看这是否适合你。

Answer 3

Instead of implementing onConfigurationChanged method you should use Jetpack WindowManager as explained by @user3471194. But keep in mind that its API has changed quite a bit, so with version 1.0.0-alpha05 WindowManager's constructor might have only one parameter (activity). Also I recommend to declare activity's configChanges in Manifest file as follows

<activity
        ...
        android:configChanges="screenLayout|screenSize|orientation|smallestScreenSize">
        ...
</activity>

On the other hand, the callback you pass to registerLayoutChangeCallback method no longer retrieves a DeviceState object but a WindowLayoutInfo instead, which has FoldingFeature that might be set as STATE_FLAT, STATE_FLIPPED,STATE_HALF_OPENED etc or it will be null if the device is non-foldable.