将像素转换为dp
我已经创建了我的应用程序，其高分辨率为480x800，Pantech设备的像素为高。
我需要为G1设备转换高度和宽度。 我认为将其转换为dp可以解决问题并为这两种设备提供相同的解决方案。
有没有简单的方法将像素转换为dp？ 有什么建议么？
/// Converts 14 dip into its equivalent px
Resources r = getResources();
float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 14, r.getDisplayMetrics());
/**
* This method converts dp unit to equivalent pixels, depending on device density.
*
* @param dp A value in dp (density independent pixels) unit. Which we need to convert into pixels
* @param context Context to get resources and device specific display metrics
* @return A float value to represent px equivalent to dp depending on device density
*/
public static float convertDpToPixel(float dp, Context context){
Resources resources = context.getResources();
DisplayMetrics metrics = resources.getDisplayMetrics();
float px = dp * ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
return px;
}
/**
* This method converts device specific pixels to density independent pixels.
*
* @param px A value in px (pixels) unit. Which we need to convert into db
* @param context Context to get resources and device specific display metrics
* @return A float value to represent dp equivalent to px value
*/
public static float convertPixelsToDp(float px, Context context){
Resources resources = context.getResources();
DisplayMetrics metrics = resources.getDisplayMetrics();
float dp = px / ((float)metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
return dp;
}
最好放在一个Util.java类中
public static float dpFromPx(final Context context, final float px) {
return px / context.getResources().getDisplayMetrics().density;
}
public static float pxFromDp(final Context context, final float dp) {
return dp * context.getResources().getDisplayMetrics().density;
}