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LogicalDensity.java
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LogicalDensity.java
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package com.android2.calculator3;
import android.content.Context;
import android.content.res.Resources;
import android.util.DisplayMetrics;
public class LogicalDensity {
/**
* This method convets dp unit to equivalent device specific value in pixels.
*
* @param dp A value in dp(Device 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 Pixels equivalent to dp according to device
*/
public static float convertDpToPixel(float dp, Context context){
Resources resources = context.getResources();
DisplayMetrics metrics = resources.getDisplayMetrics();
float px = dp * (metrics.densityDpi/160f);
return px;
}
/**
* This method converts device specific pixels to device 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 db equivalent to px value
*/
public static float convertPixelsToDp(float px, Context context){
Resources resources = context.getResources();
DisplayMetrics metrics = resources.getDisplayMetrics();
float dp = px / (metrics.densityDpi / 160f);
return dp;
}
}