Intent intent = new Intent();
Bundle bundle = new Bundle();
//该类用作携带数据
bundle.putString("name", "林计钦");
intent.putExtras(bundle);
//为意图追加额外的数据，意图原来已经具有的数据不会丢失，但key同名的数据会被替换 

Intent intent = new Intent();
intent.putExtra("name", "林计钦"); 

public class Intent implements Parcelable {
  private Bundle mExtras;
  public Intent putExtra(String name, String value) {
    if (mExtras == null) {
      mExtras = new Bundle();
     }
     mExtras.putString(name, value);
     return this;
   }
}