1、利用Intent对象携带简单数据

1.1 发送数据

 //传递些简单的参数Intent intentSimple = new Intent();intentSimple.setClass(MainActivity.this, Main2Activity.class);Bundle bundleSimple = new Bundle();bundleSimple.putString("name", "jay");bundleSimple.putString("age", "18");intentSimple.putExtras(bundleSimple);startActivity(intentSimple);

1.2 接收数据

    //接收参数Bundle bunde = this.getIntent().getExtras();String name = bunde.getString("name");String age = bunde.getString("age");

接收结果日志：

Main2Activity: name: jay   age: 18

2、传递复杂数据，例如map

2.1 利用Intent对象携带如ArrayList之类复杂些的数据

2.1.1 发送数据

		//传递复杂些的参数Map<String, Object> map1 = new HashMap<String, Object>();map1.put("key1", "value1");map1.put("key2", "value2");List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();list.add(map1);Intent intent = new Intent();intent.setClass(MainActivity.this,ComplexActivity.class);Bundle bundle = new Bundle();//须定义一个list用于在budnle中传递需要传递的ArrayList<Object>,这个是必须要的ArrayList bundlelist = new ArrayList(); bundlelist.add(list); bundle.putParcelableArrayList("list",bundlelist);intent.putExtras(bundle);              startActivity(intent);

2.1.2 接收数据

//接收参数Bundle bundle = getIntent().getExtras(); ArrayList list = bundle.getParcelableArrayList("list");//从List中将参数转回 List<Map<String, Object>>List<Map<String, Object>> lists= (List<Map<String, Object>>)list.get(0);String sResult = "";for (Map<String, Object> m : lists)  {  for (String k : m.keySet())  {  sResult += "\r\n"+k + " : " + m.get(k);  }  	    } 

2.2 通过实现Serializable接口

2.2.1 发送数据

  //              通过Serializable接口传参数的例子HashMap<String,String> map2 = new HashMap<String,String>();map2.put("key1", "value1");map2.put("key2", "value2");map2.put("key3", "value3");map2.put("key4", "value4");map2.put("key5", "value5");Bundle bundleSerializable = new Bundle();bundleSerializable.putSerializable("serializable", map2);Intent intentSerializable = new Intent();intentSerializable.putExtras(bundleSerializable);intentSerializable.setClass(MainActivity.this,Main2Activity.class);startActivity(intentSerializable);

2.2.2 接收数据

  // 接收参数Bundle bundle = this.getIntent().getExtras();//如果传 LinkedHashMap，则bundle.getSerializable转换时会报ClassCastException，不知道什么原因//传HashMap倒没有问题。HashMap<String,String> map =  (HashMap<String,String>)bundle.getSerializable("serializable");for (Map.Entry<String,String> m:map.entrySet()){Log.e(TAG, "onCreate: "+m.getKey()+"  "+m.getValue() );}

2.3 通过实现Parcelable接口

这个是通过实现Parcelable接口，把要传的数据打包在里面，然后在接收端自己分解出来。这个是Android独有的，在其本身的源码中也用得很多，

效率要比Serializable相对要好

2.3.1 首先要定义一个类，用于 实现Parcelable接口

public class XclParcelable  implements Parcelable {//定义要被传输的数据public int mInt;public String mStr;public HashMap<String,String> mMap = new HashMap<String,String>();private XclParcelable(Parcel in) {mInt=in.readInt();mStr=in.readString();mMap=in.readHashMap(HashMap.class.getClassLoader());}public  XclParcelable(){}public static final Creator<XclParcelable> CREATOR = new Creator<XclParcelable>() {@Overridepublic XclParcelable createFromParcel(Parcel in) {return new XclParcelable(in);}@Overridepublic XclParcelable[] newArray(int size) {return new XclParcelable[size];}};@Overridepublic int describeContents() {return 0;}@Overridepublic void writeToParcel(Parcel dest, int flags) {////等于将数据映射到Parcel中dest.writeInt(mInt);dest.writeString(mStr);dest.writeMap(mMap);}
}

2.3.2 设置参数

//通过实现Parcelable接口传参的例子Intent intentParcelable = new Intent();XclParcelable xp = new XclParcelable();xp.mInt = 1;xp.mStr = "字符串";xp.mMap = new HashMap<String,String>();xp.mMap.put("key", "value");intentParcelable.putExtra("Parcelable", xp);intentParcelable.setClass(MainActivity.this,Main2Activity.class);startActivity(intentParcelable);

2.3.3 接受参数

  //接收参数Intent i = getIntent();XclParcelable xp = i.getParcelableExtra("Parcelable");Log.e(TAG, "onCreate: "+" mInt ="+xp.mInt+"\r\n mStr"+xp.mStr+"\r\n size()="+xp.mMap.size() );

参考链接:Android五种数据传递方法汇总