关于 android Intent 传对象跟对象数组的一些操作

关于 android Intent 传对象和对象数组的一些操作

直接开正题，Intent传递值就是平常那些很简单的，接下来介绍传递 对象，和 对象数组

1 .intent 传递自定义的 对象 -

实体类继承  Serializable

public class AA implements Serializable{

	public String  a;
	public String  aa;
	public String  aaa;
	
	
}

intent塞入数据端

	
				AA a = new AA();
				a.a="a";
				a.aa ="aa";
				a.aaa = "aaa";
				
				Intent in = new Intent().setClass(MainActivity.this, MainActivity1.class);
				Bundle bu = new Bundle();
				bu.putSerializable("enty", a);
				in.putExtras(bu);
				startActivity(in);

intent 接收数据端

 	AA a =(AA)this.getIntent().getExtras().getSerializable("enty");
    	System.out.println("a.a ="+  app.a);
       	System.out.println("a.aa ="+  app.aa);
       	System.out.println("a.aaa ="+  app.aaa);

实体类类继承  Parcelable

public class AA implements Parcelable{

	public String  a;
	public String  aa;
	public String  aaa;

	@Override
	public int describeContents() {
		return 0;
	}

	@Override
	public void writeToParcel(Parcel parcel, int flags) {
		
		parcel.writeString(a);
		parcel.writeString(aa);
		parcel.writeString(aaa);
		
	}
	
	public static final Parcelable.Creator<AA> CREATOR  = new Creator<AA>(){
		@Override
		public AA createFromParcel(Parcel source) {
			AA app=  new AA();
			app.a = source.readString();
			app.aa = source.readString();
			app.aaa = source.readString();
			return app;
		}
		@Override
		public AA[] newArray(int size) {
			return new AA[size];
		}
		
	};
}

intent塞入数据端

	                        AA a = new AA();
				a.a="a";
				a.aa ="aa";
				a.aaa = "aaa";
				
				Intent in = new Intent().setClass(MainActivity.this, MainActivity1.class);
				Bundle bu = new Bundle();
				bu.putParcelable("enty", a);
				in.putExtras(bu);
				startActivity(in);

接收数据端

 // 可以这样app =(AA)this.getIntent().getParcelableExtra("enty");
			//也可以这样写，上面的也是
			app =(AA)this.getIntent().getExtras().getParcelable("enty");
			System.out.println("a.a ="+  app.a);
	       	System.out.println("a.aa ="+  app.aa);
	       	System.out.println("a.aaa ="+  app.aaa);

2。 下来是 自定义对象 数组传递

实体类类继承  Parcelable

intent塞入数据端

                      List<AA> list_aa =new ArrayList<AA>();
				AA a = new AA();
				a.a="a";
				a.aa ="aa";
				a.aaa = "aaa";
				
                           AA a1 = new AA();
				a1.a="a1";
				a1.aa ="aa1";
				a1.aaa = "aaa1";
				
				list_aa.add(a);
				list_aa.add(a1);
	
				Intent in = new Intent().setClass(MainActivity.this, MainActivity1.class);
				Bundle bu = new Bundle();
				bu.putParcelableArrayList("list", (ArrayList<? extends Parcelable>) list_aa);  //---
				in.putExtras(bu);
				startActivity(in);

接收list数据端

List<AA> aa =this.getIntent().getExtras().getParcelableArrayList("list");
			
			for (AA aa2 : aa) {
				System.out.println("list_a.a = "+ aa2.a);
				System.out.println("list_a.aa = "+ aa2.aa);
				System.out.println("list_a.aaa = "+ aa2.aaa);
				System.out.println("=================================");
				
			}

1楼u01196040253分钟前

嗯，不错