Android完美适配

GitHub地址：https://github.com/raul-lsj/ScreenDensityUtils

参考今日头条技术团队：https://mp.weixin.qq.com/s/d9QCoBP6kV9VSWvVldVVwA

参考https://blog.csdn.net/raul575_li/article/details/80801312

具体实现代码：

此处代码是按照设计图为宽度360dp，高度667dp进行处理的，如果设计图给出的dp不同，要以实际dp为准。

packagecom.screen.density.utils;

importandroid.app.Activity;

importandroid.app.Application;

importandroid.content.ComponentCallbacks;

importandroid.content.res.Configuration;

importandroid.support.annotation.NonNull;

importandroid.support.annotation.Nullable;

importandroid.util.DisplayMetrics;

/**

* 通过修改系统参数来适配android设备

* https://www.jianshu.com/p/4254ea9d1b27

*

* Created by Raul_lsj on 2018/6/6.

*/

publicclassDensity{

privatestaticfloatappDensity;

privatestaticfloatappScaledDensity;

privatestaticDisplayMetricsappDisplayMetrics;

publicstaticvoidsetDensity(@NonNullApplicationapplication) {

//获取application的DisplayMetrics

appDisplayMetrics=application.getResources().getDisplayMetrics();

if(appDensity==0) {

//初始化的时候赋值

appDensity=appDisplayMetrics.density;

appScaledDensity=appDisplayMetrics.scaledDensity;

//添加字体变化的监听

application.registerComponentCallbacks(newComponentCallbacks() {

@Override

publicvoidonConfigurationChanged(ConfigurationnewConfig) {

//字体改变后,将appScaledDensity重新赋值

if(newConfig!=null&&newConfig.fontScale>0) {

appScaledDensity=application.getResources().getDisplayMetrics().scaledDensity;

                    }

                }

@Override

publicvoidonLowMemory() {

                }

            });

        }

    }

//此方法在BaseActivity中做初始化(如果不封装BaseActivity的话,直接用下面那个方法就好)

publicstaticvoidsetDefault(Activityactivity) {

setAppOrientation(activity,AppUtils.WIDTH);

    }

//此方法用于在某一个Activity里面更改适配的方向

publicstaticvoidsetOrientation(Activityactivity,Stringorientation) {

        setAppOrientation(activity, orientation);

    }

/**

    * targetDensity

    * targetScaledDensity

    * targetDensityDpi

    * 这三个参数是统一修改过后的值

*

    * orientation:方向值,传入width或height

*/

privatestaticvoidsetAppOrientation(@NullableActivityactivity,Stringorientation) {

floattargetDensity;

//获取状态栏高度

intbarHeight=AppUtils.getStatusBarHeight(activity);

if(orientation.equals("height")) {

targetDensity=(appDisplayMetrics.heightPixels-barHeight)/667f;

}else{

targetDensity=appDisplayMetrics.widthPixels/360f;

        }

floattargetScaledDensity=targetDensity*(appScaledDensity/appDensity);

inttargetDensityDpi=(int) (160*targetDensity);

/**

        *

        * 最后在这里将修改过后的值赋给系统参数

        *

        * 只修改Activity的density值

*/

DisplayMetricsactivityDisplayMetrics=activity.getResources().getDisplayMetrics();

activityDisplayMetrics.density=targetDensity;

activityDisplayMetrics.scaledDensity=targetScaledDensity;

activityDisplayMetrics.densityDpi=targetDensityDpi;

    }

}