How to get screen display metrics in application class

问题

If I put this in some activity class it works perfectly but, when I put it in my App class the method getWindowManager() can not be found. Is there some way to get the WindowManager in app class?

My app class is defined like this:

public class myApp extends Application {

and in on create method I have this:

DisplayMetrics dm = new DisplayMetrics(); 
getWindowManager().getDefaultDisplay().getMetrics(dm); 
int width = dm.widthPixels;

回答1:

Here, Context.getResource()

DisplayMetrics dm = getResources().getDisplayMetrics(); 
int densityDpi = dm.densityDpi;

回答2:

You can also try this:

WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
final DisplayMetrics displayMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels;

回答3:

Try this:

Display display = getWindowManager().getDefaultDisplay();
Log.e("", "" + display.getHeight() + " " + display.getWidth());

回答4:

final DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);

int width = dm.widthPixels;
int height = dm.heightPixels;

getWindow().setLayout((int) (width * .8), (int) (height * .5));

回答5:

hope this will work for you

DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
int pxWidth = displayMetrics.widthPixels;
int pxHeight = displayMetrics.heightPixels;

来源：https://stackoverflow.com/questions/9114436/how-to-get-screen-display-metrics-in-application-class

标签

android

metrics