DensityUtils.java
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package com.cnlive.media.utils;
/**
* Created by vclub on 15/5/15.
*/
import android.content.Context;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.WindowManager;
/**
* 常用单位转换的辅助类
*/
public class DensityUtils {
private DensityUtils() {
/** cannot be instantiated **/
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* dp转px
*
* @param context
* @param dpVal
* @return
*/
public static int dp2px(Context context, float dpVal) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
dpVal, context.getResources().getDisplayMetrics());
}
/**
* sp转px
*
* @param context
* @param spVal
* @return
*/
public static int sp2px(Context context, float spVal) {
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
spVal, context.getResources().getDisplayMetrics());
}
/**
* px转dp
*
* @param context
* @param pxVal
* @return
*/
public static float px2dp(Context context, float pxVal) {
final float scale = context.getResources().getDisplayMetrics().density;
return (pxVal / scale);
}
/**
* px转sp
*
* @param context
* @param pxVal
* @return
*/
public static float px2sp(Context context, float pxVal) {
return (pxVal / context.getResources().getDisplayMetrics().scaledDensity);
}
// 屏幕宽度（像素）
public static int getScreenWidth(Context context) {
DisplayMetrics metric = new DisplayMetrics();
WindowManager windowManager = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
if (windowManager != null) windowManager.getDefaultDisplay().getMetrics(metric);
return metric.widthPixels;
}
// 屏幕高度（像素）
public static int getScreenHeight(Context context) {
DisplayMetrics metric = new DisplayMetrics();
WindowManager windowManager = (WindowManager) context.getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
if (windowManager != null) windowManager.getDefaultDisplay().getMetrics(metric);
return metric.heightPixels;
}
}