A new screen adaptation scheme for android

I recently researched the android screen adaptation scheme. In fact, there are many adaptations on the Internet, but I feel that the writing is very tall, but when I use it, the layout is disordered and cannot be adapted to various models.

  Xiaosheng Bucai wrote a simple adaptation scheme. The dp in your layout still uses your dp, nothing needs to be changed, you only need a few lines of code to get it done 

  Of course, this adaptation cannot be a panacea for all mobile phones . After all, mobile phones on the market are a hodgepodge of hodgepodge. As a programmer, I express my heartache . Well, I will stop talking nonsense. I believe you have already searched a lot of nonsense articles. now ; ok I'll start my show, the crowd applaud

   Let's take a look first

              Density Resolution
ldpi 0.75 320*240    
mdpi 1 480*320  
hdpi 1.5 800*480  
xhdpi 2.0 1280*720  

xxhdpi     3.0            1080x1920 

We are going to use this class

      This is just the core code

activityLifecycleCallbacks = new Application.ActivityLifecycleCallbacks() { //This is to monitor all activities
            @Override
            public void onActivityCreated(Activity activity, Bundle savedInstanceState) {              
                density(activity, mWidth,mHeight); //We get the activity here
            }

            @Override
            public void onActivityStarted(Activity activity) {
            }

            @Override
            public void onActivityResumed(Activity activity) {
            }

            @Override
            public void onActivityPaused(Activity activity) {
            }

            @Override
            public void onActivityStopped(Activity activity) {
            }

            @Override
            public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
            }

            @Override
            public void onActivityDestroyed(Activity activity) {
            }
        };

private static void density(Context context, float width , float height){
        Point point = new Point();     
        ((WindowManager)context.getSystemService(WINDOW_SERVICE)).getDefaultDisplay().getSize(point); //Get the value of the screen     
        context.getResources().getDisplayMetrics().density = point.x/width*2f; //context is the width of the screen where we get the context setting density value in the activity/the mainstream resolution we set by ourselves*2f (representing this mainstream The density value of the resolution is based on 720*1280)
        context.getResources().getDisplayMetrics().density = point.y/height*2f;       
    }

  
    public void start(){
        resetDensity(mApplication, mWidth,mHeight); //The parameters inside are saved by the constructor of the class
        mApplication.registerActivityLifecycleCallbacks(activityLifecycleCallbacks);
    }