DeviceUtils.java
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/*
* Copyright (C) 2013 Peng fei Pan <sky@xiaopan.me>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hjx.miaohongentry.util;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Point;
import android.os.Build;
import android.util.TypedValue;
import android.view.Display;
import android.view.WindowManager;
/**
* 设备工具箱，提供与设备硬件相关的工具方法
*/
public class DeviceUtils {
/**
* 获取屏幕尺寸
*/
@SuppressWarnings("deprecation")
@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
public static Point getScreenSize(Context context){
WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = windowManager.getDefaultDisplay();
if(Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB_MR2){
return new Point(display.getWidth(), display.getHeight());
}else{
Point point = new Point();
display.getSize(point);
return point;
}
}
public static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
/**
* dp转px
*
* @param context 上下文
* @param dpVal dp值
* @return result in px
*/
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 上下文
* @param spVal sp值
* @return result in px
*/
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 上下文
* @param pxVal px值
* @return result in dp
*/
public static float px2dp(Context context, float pxVal) {
final float scale = context.getResources().getDisplayMetrics().density;
return (pxVal / scale);
}
/**
* px转sp
*
* @param context 上下文
* @param pxVal px值
* @return result in sp
*/
public static float px2sp(Context context, float pxVal) {
return (pxVal / context.getResources().getDisplayMetrics().scaledDensity);
}
}