为什么我会得到这种高度值差异？

Question

我的屏幕是 1080x1920。绿线高度为 1794，红线 - 63（状态栏）+ 84（标题栏）= 147，紫线 - 1584。为什么我在紫线加红线后得不到绿线高度？

紫线表示相对布局的高度，我在 onWindowFocusChanged():

中用这段代码找到了它

RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.myRelativeLayout);
Log.i(TAG, "Relative layout height: "+String.valueOf(relativeLayout.getHeight()));

红线表示标题栏和状态栏的高度，我在 onWindowFocusChanged():

中用这段代码找到了它

Rect rectangle = new Rect();
Window window = getWindow();
window.getDecorView().getWindowVisibleDisplayFrame(rectangle);
int statusBarHeight = rectangle.top;
int contentViewTop = window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
int titleBarHeight= contentViewTop - statusBarHeight;

Log.i(TAG, "StatusBar Height= " + statusBarHeight + " , TitleBar Height = " + titleBarHeight);

绿线应该代表整个程序的高度？我在 onWindowFocusChanged():

中用这段代码找到了它

Display mdisp = getWindowManager().getDefaultDisplay();
Log.i(TAG, "mdisp: "+String.valueOf(mdisp));
Point mdispSize = new Point();
mdisp.getSize(mdispSize);
int maxX = mdispSize.x;
int maxY = mdispSize.y;
Log.i(TAG, "Max X, Y: "+String.valueOf(maxX)+", "+String.valueOf(maxY));

XML布局文件内容：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="lt.wilkas.Whosebugquestion.MainActivity"
    android:id="@+id/myRelativeLayout">

</RelativeLayout>

Answer 1

您的标题栏高度不正确。如您所见，您的标题栏高度在视觉上看起来是状态栏高度的两倍多。所以请使用不同的方法来获取您的标题栏高度。

你可以这样得到：

int whiteParentHeight = 0;
int titlebarHeight = 0;

public int getTitleBarHeight() {

whiteParent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {

            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
                //noinspection deprecation
                whiteParent.getViewTreeObserver().removeGlobalOnLayoutListener(this);
            } else {
                whiteParent.getViewTreeObserver().removeOnGlobalLayoutListener(this);
            }

            whiteParentHeight = whiteParent.getHeight();
            titlebarHeight = whiteParentHeight - getStatusBarHeight();

        }
    });

}


public int getStatusBarHeight() {

    int result = 0;
    int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");

    if (resourceId > 0) {
        result = getResources().getDimensionPixelSize(resourceId);
    }

    return result;

}

或者要找到默认的标题栏高度，您可以使用：

final TypedArray styledAttributes = getContext().getTheme().obtainStyledAttributes(
                new int[] { android.R.attr.actionBarSize });
mActionBarSize = (int) styledAttributes.getDimension(0, 0);
styledAttributes.recycle();

希望对您有所帮助。

为什么我会得到这种高度值差异？

Why I get this difference of height values?

android

android-layout

android-titlebar

android-actionbar

android-statusbar