73 lines
2.2 KiB
Plaintext
73 lines
2.2 KiB
Plaintext
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package com.example.administrator.ximengjianyu.utils;
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import android.app.Activity;
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import android.content.Context;
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import android.support.annotation.NonNull;
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import android.util.DisplayMetrics;
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/**
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* Created by xukai on 2017/2/13.
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*/
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public class ScreenUtils {
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/**
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* 根据手机的分辨率从 dip 的单位 转成为 px(像素)
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*/
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public static int dip2px(Context context, float dpValue) {
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final float scale = context.getResources().getDisplayMetrics().density;
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return (int) (dpValue * scale + 0.5f);
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}
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/**
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* 根据手机的分辨率从 px(像素) 的单位 转成为 dp
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*/
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public static int px2dip(Context context, float pxValue) {
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final float scale = context.getResources().getDisplayMetrics().density;
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return (int) (pxValue / scale + 0.5f);
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}
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/**
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* 该方法用来获取屏幕的宽度
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*/
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public int getScreenWidth(Activity activity){
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DisplayMetrics metric = getDisplayMetrics(activity);
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int width = metric.widthPixels;
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return width;
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}
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/**
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* 该方法用来获取屏幕的高度
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*/
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public int getScreenHeight(Activity activity){
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DisplayMetrics metric = getDisplayMetrics(activity);
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int heightPixels = metric.heightPixels;
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return heightPixels;
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}
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/**
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* 用来获取屏幕的屏幕密度
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* @return
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*/
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public float getScreenDensity(Activity activity){
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DisplayMetrics metrics = getDisplayMetrics(activity);
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float density = metrics.density; // 屏幕密度（0.75 / 1.0 / 1.5）
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return density;
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}
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/**
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* 用来获取屏幕的密度DPI
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*/
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public int getScreenDensityPDI(Activity activity){
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DisplayMetrics metrics = getDisplayMetrics(activity);
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int densityDpi = metrics.densityDpi; // 屏幕密度DPI（120 / 160 / 240）
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return densityDpi;
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}
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@NonNull
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private DisplayMetrics getDisplayMetrics(Activity activity) {
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DisplayMetrics metric = new DisplayMetrics();
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activity.getWindowManager().getDefaultDisplay().getMetrics(metric);
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return metric;
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}
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}
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