Unity 获取手机键盘弹出高度

目的

在手机上进行聊天时，键盘弹起会盖住聊天窗口，所以需要键盘弹起的时候，将界面也进行上移。

解决

安卓

  publicint GetKeyboardHeight()
  {
      using (var unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
      {
          var unityPlayer = unityClass.GetStatic<AndroidJavaObject>("currentActivity").Get<AndroidJavaObject>("mUnityPlayer");
          var view = unityPlayer.Call<AndroidJavaObject>("getView");
          var dialog = unityPlayer.Get<AndroidJavaObject>("b");

          if (view == null || dialog == null)
              return 0;

          var decorHeight = 0;

          if (true)//includeInput
          {
              var decorView = dialog.Call<AndroidJavaObject>("getWindow").Call<AndroidJavaObject>("getDecorView");

              if (decorView != null)
                  decorHeight = decorView.Call<int>("getHeight");
          }

          using (var rect = new AndroidJavaObject("android.graphics.Rect"))
          {
              view.Call("getWindowVisibleDisplayFrame", rect);
              return Display.main.systemHeight - rect.Call<int>("height") + decorHeight;
          }
      }
  }

苹果

public int GetKeyboardHeight()
 {
     return (int)TouchScreenKeyboard.area.height * Display.main.systemHeight / Screen.height;
 }

调用

float k = gameObject.GetComponentInParent<CanvasScaler>().GetComponent<RectTransform>().sizeDelta.y;
float keyboardHeight = SdkManager.Instance.GetKeyboardHeight();
float keyboardHeightUi = keyboardHeight * k / Display.main.systemHeight;
m_Rt.anchoredPosition = Vector3.up * keyboardHeightUi;