Android global variable usage

1. You can use a Data. java instance class to save global Data. I will not talk about it here. I know everything about Java.

2. The Android-specific Application is the entry to the Application. It runs throughout the entire app running process. You can define global variables in this class.

Public class baseApplication extends Application {private float screenWidth; private float screenHeight; public float getScreenWidth () {return screenWidth;} public void setScreenWidth (float screenWidth) {this. screenWidth = screenWidth;} public float getScreenHeight () {return screenHeight;} public void setScreenHeight (float screenHeight) {this. screenHeight = screenHeight ;}}

Call directly when using:

BaseApplication B = (baseApplication) getApplicationContext (); float width = B. getScreenWidth (); float height = B. getScreenHeight ();