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
[mw_shl_code=java,true]
WindowManager windowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
Display d = windowManager.getDefaultDisplay();
mWidth = d.getWidth();mHeight = d.getHeight();
DisplayMetrics dm = getResources().getDisplayMetrics()
mScreenDensity = dm.density;
[/mw_shl_code]
(2)美工设计图的尺寸
uiWidth,uiHeight
(3)获取缩放比例
[mw_shl_code=java,true]
float scaleWidth = mWidth / uiWidth;
float scaleHeight = mHeight/ uiHeight;
[/mw_shl_code]
(4)所有布局的尺寸用代码实现:
[mw_shl_code=java,true]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);}[/mw_shl_code]
(5)这里是设置尺寸的代码:
[mw_shl_code=java,true] setViewSize(100, 100, mView);
setViewMargin(20, 0, 0, 20, mView);
setViewPadding(10, 10, 10, 10, mView);
mTextView.setTextSize(getTextSize(30)); [/mw_shl_code]
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。
android当中大图片显示适应问题
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转载自mojianpo.iteye.com/blog/2096208
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