Android 利用全局对象传递数据

Android  利用全局对象传递数据，好处就是不用再传递静态变量了，它会在app初始化的时候自动完成初始化

s1:

 packagecom.example.counttest;

 

import android.app.Application;

 

public classMyApp extends Application {

    public Stringname;

}

s2:  <application

        android:name="com.example.counttest.MyApp">

 

s3:   MyApp app = (MyApp) getApplicationContext();

        app.name = "gogo";

s4:Toast.makeText(getApplicationContext(),app.name, Toast.LENGTH_LONG).show();