我如何在Android的屏幕的高度？ [英] How do I get the height of the screen in Android?

问题描述

我怎样才能在Android的屏幕可用高度？我需要的高度减去状态栏/菜单栏或其他任何装饰，可能是在屏幕上，我需要它适用于所有设备。另外，我需要在OnCreate函数知道这一点。我知道这个问题已经被问过，但我已经尝试过他们的解决方案，其中没有工作。下面是一些我尝试过的事情：

How can I get the available height of the screen in Android? I need to the height minus the status bar / menu bar or any other decorations that might be on screen and I need it to work for all devices. Also, I need to know this in the onCreate function. I know this question has been asked before but I have already tried their solutions and none of them work. Here are some of the things I have tried:

这并没有考虑到状态栏/菜单栏：

This does not take into account the status bar / menu bar:

Display display = getWindowManager().getDefaultDisplay();
screenWidth = display.getWidth();
screenHeight = display.getHeight();

无论是做这个的：

Neither does this:

Point size = new Point();
getWindowManager().getDefaultDisplay().getSize(size);
screenWidth = size.x;
screenHeight = size.y;

这也不：

Point size = new Point();
getWindowManager().getDefaultDisplay().getRealSize(size);
screenWidth = size.x;
screenHeight = size.y;

这不工作：

Display display = getWindowManager().getDefaultDisplay();
DisplayMetrics metrics = new DisplayMetrics();
display.getMetrics(metrics);
// since SDK_INT = 1;
screenWidth = metrics.widthPixels;
screenHeight = metrics.heightPixels;
try
{
    // used when 17 > SDK_INT >= 14; includes window decorations (statusbar bar/menu bar)
    screenWidth = (Integer) Display.class.getMethod("getRawWidth").invoke(display);
    screenHeight = (Integer) Display.class.getMethod("getRawHeight").invoke(display);
}
catch (Exception ignored)
{
    // Do nothing
}
try
{
    // used when SDK_INT >= 17; includes window decorations (statusbar bar/menu bar)
    Point realSize = new Point();
    Display.class.getMethod("getRealSize", Point.class).invoke(display, realSize);
    screenWidth = realSize.x;
    screenHeight = realSize.y;
}
catch (Exception ignored)
{
    // Do nothing
}

然后我用下面的code减去从屏幕高度的状态栏和菜单栏的高度：

I then used the following code to subtract the height of the status bar and menu bar from the screen height:

int result = 0;
int resourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
if (resourceId > 0)
    result = getResources().getDimensionPixelSize(resourceId);
screenHeight -= result;
result = 0;
if (screenHeight >= screenWidth)
    resourceId = getResources().getIdentifier("navigation_bar_height", "dimen", "android");
else
    resourceId = getResources().getIdentifier("navigation_bar_height_landscape", "dimen", "android");
if (resourceId > 0)
    result = getResources().getDimensionPixelSize(resourceId);
screenHeight -= result;

在17 API它给它正确地计算纵向状态栏和菜单栏的高度，而不是在景观。在API 10，则返回0。我需要它在所有设备上或最小API 10.任何帮助最理想的工作将大大AP preciated。

On API 17 it gives it correctly calculates the height of the status bar and menu bar in portrait but not in landscape. On API 10, it returns 0. I need it to work ideally on all devices or minimum API 10. Any help would be greatly appreciated.

推荐答案

下面是我如何设法得到所有设备的正确尺寸的屏幕：

Here is how I managed to get the correct screen dimensions for all devices:

public class MainActivity extends Activity
{
    static int ScreenWidth;
    static int ScreenHeight;
    static int ScreenWidthLandscape;
    static int ScreenHeightLandscape;

    private RelativeLayout layout;
    private RelativeLayout.LayoutParams params;
    private View top;
    private View bottom;

    @SuppressWarnings("deprecation")
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        layout = new RelativeLayout(this);
        top = new View(this);
        bottom = new View(this);
        RelativeLayout.LayoutParams viewParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 1);
        viewParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
        top.setLayoutParams(viewParams);
        viewParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 1);
        viewParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
        bottom.setLayoutParams(viewParams);
        layout.addView(top);
        layout.addView(bottom);
        setContentView(layout);
        final Intent intent = new Intent(this, myPackage.learnSpanishVerbs.Start.class);

        final View view = getWindow().getDecorView().getRootView();
        ViewTreeObserver vto = view.getViewTreeObserver();
        vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener()
        {
            @Override
            public void onGlobalLayout()
            {
                int topLoc[] = new int[2];
                top.getLocationOnScreen(topLoc);
                int BottomLoc[] = new int[2];
                bottom.getLocationOnScreen(BottomLoc);
                boolean portrait = getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE;
                if (portrait)
                {
                    ScreenWidth = top.getWidth();
                    ScreenHeight = BottomLoc[1] - topLoc[1];
                }
                else
                {
                    ScreenWidthLandscape = top.getWidth();
                    ScreenHeightLandscape = BottomLoc[1] - topLoc[1];
                }

                if (Build.VERSION.SDK_INT < 16)
                    view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                else
                    view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                startActivity(intent);
                finish();
            } 
        });
    }
}

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