Android

关注公众号 jb51net

关闭
首页 > 软件编程 > Android > Android 图片适配

Android 图片显示与屏幕适配的问题

投稿:lqh

这篇文章主要介绍了Android 图片显示与屏幕适配的问题的相关资料,Android的分辨率问题是每个Android 开发者头疼的问题,那么这里给大家介绍个万能办法,需要的朋友可以参考下

Android 图片显示与屏幕适配的问题

在Android开发中比较头疼的是Android的分辨率问题,那么这里给大家介绍个万能办法,这个办法的优点是可以实现万能适应,给开发和美工设计提供了依据,但是对开发来说代码量也不少,具体办法:

(1)获取屏幕的尺寸

WindowManager windowManager = (WindowManager)     getSystemService(Context.WINDOW_SERVICE);
Display d = windowManager.getDefaultDisplay();
mWidth = d.getWidth();mHeight = d.getHeight();
DisplayMetrics dm = getResources().getDisplayMetrics()
mScreenDensity = dm.density;

(2)美工设计图的尺寸

uiWidth,uiHeight

(3)获取缩放比例

float scaleWidth = mWidth / uiWidth;
float scaleHeight = mHeight/ uiHeight;

(4)所有布局的尺寸用代码实现:

public static int getWidthSize(int size) {
        return (int) (size * scaleWidth);
    }

    public static int getHightSize(int size) {
        return (int) (size * scaleHeight);
    }

    public static float getTextSize(int pxSize) {
        return (pxSize * scaleHeight) / mScreenDensity;
    }

    public static void setViewSize(int width, int height, View v) {
        int paramWidth = getWidthSize(width);
        int paramHeight = getHightSize(height);
        ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) v
                .getLayoutParams();
        if (width != INVALID) {
            params.width = paramWidth;
        }
        if (height != INVALID) {
            params.height = paramHeight;
        }
        v.setLayoutParams(params);
    }

    public static void setViewPadding(int left, int top, int right, int bottom,
            View v) {
        left = getWidthSize(left);
        top = getHightSize(top);
        right = getWidthSize(right);
        bottom = getWidthSize(bottom);
        v.setPadding(left, top, right, bottom);
    }

    public static void setViewMargin(int left, int top, int right, int bottom,
            View v) {
        int paramLeft = getWidthSize(left);
        int paramTop = getHightSize(top);
        int paramRight = getWidthSize(right);
        int paramBottom = getHightSize(bottom);
        ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) v
                .getLayoutParams();
        if (left != INVALID) {
            params.leftMargin = paramLeft;
        }
        if (right != INVALID) {
            params.rightMargin = paramRight;
        }
        if (top != INVALID) {
            params.topMargin = paramTop;
        }
        if (bottom != INVALID) {
            params.bottomMargin = paramBottom;
        }
        v.setLayoutParams(params);}

(5)这里是设置尺寸的代码:

setViewSize(100, 100, mView);
    setViewMargin(20, 0, 0, 20, mView);
    setViewPadding(10, 10, 10, 10, mView);
    mTextView.setTextSize(getTextSize(30));

由上在设计效果图时,可对图内元素进行尺寸标注,程序即可实现按比例缩放。

以上就是Android 图片显示与屏幕适配的问题的万能解决办法,如有疑问请留言或者到本站社区交流讨论,感谢阅读,希望能帮助到大家,谢谢大家对本站的支持!

您可能感兴趣的文章:
阅读全文