备忘：Activity间传递数据

1. 基本类型参数传递
   Activity间传递一些基本类型的数据可以直接进行传递，比如
   • 直接通过intent传递

    //发送数据方
    Intent intent = new Intent();
    intent.putExtra("username",username);
    intent.putExtra("userpass",userpass);
    intent.setClass(ThisActivity.this,TargetActivity.class);
    startActivity(intent);

    //接受数据方
    Intent intent = getIntent();
    String name = intent.getStringExtra("username");
    String pass = intent.getStringExtra("userpass);

* 通过Bundle传递

    //传入  
    Intent it = new Intent(this,typeof(OtherActivity));  
    Bundle bd = new Bundle();  
    bd.PutBoolean("isNiubi",true);  
    bd.PutInt("Id",123456);  
     bd.PutString("name","詹姆斯");  
    it.PutExtras(bd);  
    StartActivity(it);  
    //接收  
    Bundle bd = Intent.Extras;  
    int Id = bd.GetInt("Id");  
    string Name = bd.GetString("name");  
    bool niubi = bd.GetBoolean("niubi");  

2. List对象传递

  //传送
  private List<String> myList;
  Intent intent = new Intent();
  intent.putExtra("myList", (Serializable) myList);
  intent.setClass(A.this, B.class);
  startActivity(intent);  //开始跳转
  // 接受
  Intent intent = this.getIntent();   
  Bundle bundle = intent.getExtras();  //获得全部数据
  myList= (List<String>) bundle.getSerializable("myList");      

3. 一般对象传递

   1. 要传递的对象，实现Parcelable接口，Parcelable实现可以直接通过Parcelable插件实现。这样不用写代码
      

      

   2. 具体传递过程

//传送
  Intent intent = new Intent();
  intent.putExtra("myObj", myObj);  //放入对象数据
  intent.setClass(A.this, B.class);
  startActivity(intent);  //开始跳转
//接受
  Intent intent = this.getIntent();    //获得当前的Intent
  Bundle bundle = intent.getExtras();  //获得全部数据
  myObj = bundle.getParcelable("myObj");