Question

在Google上搜索时，我发现了多种获取屏幕尺寸的方法，这就是我得到的。

    Display display = getWindowManager().getDefaultDisplay();
    Point size = new Point();
    display.getSize(size);
    Log.i(TAG, "first way width = "+size.x);
    Log.i(TAG, "first way height = "+size.y);

    int width = getWindowManager().getDefaultDisplay().getWidth();
    int height = getWindowManager().getDefaultDisplay().getHeight();
    Log.i(TAG, "second way width = "+width);
    Log.i(TAG, "second way height = "+height);

    int height2 = Resources.getSystem().getDisplayMetrics().heightPixels;
    int width2 = Resources.getSystem().getDisplayMetrics().widthPixels;
    Log.i(TAG, "third way width = "+width2);
    Log.i(TAG, "third way height = "+height2);

    DisplayMetrics displaymetrics = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
    int height3 = displaymetrics.heightPixels;
    int width3 = displaymetrics.widthPixels;
    Log.i(TAG, "fourth way width = "+width3);
    Log.i(TAG, "fourth way height = "+height3);

在记录时，所有结果都相同。我想知道所有这些方法或特定用例之间是否有区别？预先感谢。

Answer 1

不要重新使用轮子，这是检查屏幕高度和宽度的代码：

/**
     * Return the width of screen, in pixel.
     *
     * @return the width of screen, in pixel
     */
    public static int getScreenWidth() {
        WindowManager wm = (WindowManager) Utils.getApp().getSystemService(Context.WINDOW_SERVICE);
        if (wm == null) {
            return Utils.getApp().getResources().getDisplayMetrics().widthPixels;
        }
        Point point = new Point();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            wm.getDefaultDisplay().getRealSize(point);
        } else {
            wm.getDefaultDisplay().getSize(point);
        }
        return point.x;
    }

    /**
     * Return the height of screen, in pixel.
     *
     * @return the height of screen, in pixel
     */
    public static int getScreenHeight() {
        WindowManager wm = (WindowManager) Utils.getApp().getSystemService(Context.WINDOW_SERVICE);
        if (wm == null) {
            return Utils.getApp().getResources().getDisplayMetrics().heightPixels;
        }
        Point point = new Point();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            wm.getDefaultDisplay().getRealSize(point);
        } else {
            wm.getDefaultDisplay().getSize(point);
        }
        return point.y;
    }

由BlankJ从helper library中挑选

Answer 2

这是另一种方式：

public static DisplayMetrics displayMetrics;

displayMetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);

对于屏幕的宽度：

float screenWidth = displayMetrics.widthPixels;

关于屏幕的高度：

float screenHeight = displayMetrics.heightPixels;

什么是在Android中捕获屏幕尺寸的正确方法

2 个答案: