public class SharePreference { 
  Context context; 
  public SharePreference(Context context) 
  { 
    this.context = context; 
  } 
  /****设置状态  false为安装后第一次登录，true为已经登录过****/ 
  public void setState() 
  { 
    SharedPreferences sp = context.getSharedPreferences("save.himi", Context.MODE_PRIVATE); 
    Editor editor = sp.edit(); 
    editor.putBoolean("isLogin", true); 
    editor.commit(); 
  } 
  /***获取状态***/ 
  public boolean getState() 
  { 
    SharedPreferences sp = context.getSharedPreferences("save.himi", Context.MODE_PRIVATE); 
    boolean b = sp.getBoolean("isLogin", false); 
    return b; 
  } 
} 

isLogin = sp.getState(); 
    if(isLogin){ 
       intent = new Intent(this,Activity1.class); 
    } 
    else { 
      sp.setState();<span style="white-space:pre">  </span>//将登陆状态设置为true; 
       intent = new Intent(this,Activity2.class); 
    }