跨apk访问SharedPreferences

//该activity生成一个SharedPreferences

//1：APK->activity

//包名：com.test.pkg

public void onCreate(Bundle savedInstanceState)
 {
  super.onCreate(savedInstanceState);
 SharedPreferences mPrefs = getSharedPreferences("com.test.pkg_preferences",Context.MODE_WORLD_READABLE );
//注意这里的  Context.MODE_WORLD_READABLE

}

 

//访问上一个activity的SharedPreferences

//2：APK->activity

public void onCreate(Bundle savedInstanceState)
 {        
  Context otherAppsContext = null;
  try
  {
   otherAppsContext = createPackageContext(
     "com.test.pkg", 0);
  }
  catch (NameNotFoundException e)
  {
  }

 SharedPreferences mPrefs = otherAppsContext.getSharedPreferences("com.test.pkg_preferences",Context.MODE_PRIVATE);
}