获取窗口管理器错误"No interface method getCurrentWindowMetrics()"

Question

我正在尝试获取我的窗口的可用(无插图(屏幕宽度和高度。由于API 30不赞成使用过去的方法，我希望使用get bounds部分中讨论的技术：https://developer.android.com/reference/kotlin/android/view/WindowMetrics.为了测试这一点，我在onCreate中调用getWindowManager().getCurrentWindowMetrics()，并将其分配给一个变量。当我运行它时，我会遇到一个奇怪的运行时错误。如有任何帮助，我们将不胜感激。

崩溃：java.lang.NoSuchMethodError: No interface method getCurrentWindowMetrics()Landroid/view/WindowMetrics; in class Landroid/view/WindowManager; or its super classes (declaration of 'android.view.WindowManager' appears in /system/framework/framework.jar!classes3.dex)

代码：

public class MainView extends AppCompatActivity {
private Context context;
private ProgressBar turnProgressView;
private GameLogicPresenter gameLogicPresenter;
private RelativeLayout boardLayout;
private BoardViewManager boardViewManager;
private ImageView playerGoingImageView;
private int numZoomsSoFar = 0; // Can be positive or negative.
private WindowManager theWindowManager;
private Map<String, Drawable> boardSymbolStringToDrawableMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_in_game_page);
context = MainView.this;
Bundle extras = getIntent().getExtras();
final WindowMetrics metrics = getWindowManager().getCurrentWindowMetrics();

Answer 1

Windowmetrics不能在api低于30、的手机中使用

Answer 2

您尝试使用的API在API 30以下不可用(来源：https://developer.android.com/reference/android/view/WindowMetrics)。看看我为你写的这个代码片段，因为它可能会解决你的问题：

var topInsets = 0
var bottomInsets = 0
var leftInsets = 0
var rightInsets = 0
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
ViewCompat.setOnApplyWindowInsetsListener(requireActivity().window.decorView) { _, windowInsets ->
windowInsets.getInsets(WindowInsetsCompat.Type.systemBars()).let { insets -> //  check out WindowInsetsCompat.Type.navigationBars() as well as it might be a better fit for you
topInsets = insets.top
bottomInsets = insets.bottom
leftInsets = insets.left
rightInsets = insets.right
}
windowInsets
}
} else {
requireActivity().windowManager.currentWindowMetrics.windowInsets.getInsets(WindowInsets.Type.systemBars()).let { insets -> //  friendly reminder - WindowInsetsCompat.Type.navigationBars() 
topInsets = insets.top
bottomInsets = insets.bottom
leftInsets = insets.left
rightInsets = insets.right
}
}