android intent传递Parcelable对象

最新推荐文章于 2024-04-29 08:45:00 发布

原创最新推荐文章于 2024-04-29 08:45:00 发布 · 1k 阅读

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本文介绍了一个名为FriendET的实体类，该类继承自Friend并实现了Parcelable接口，用于存储好友名称和回复码等信息。此外，还展示了如何在Android应用中通过Intent广播更新UI来显示好友申请的数量变化。

Entity：

import android.os.Parcel;
import android.os.Parcelable;

import com.biznest.campusinformation.sqlite.entity.Friend;

public class FriendET extends Friend implements Parcelable{

	//below fields are used by Heartbeat 
	private String name;
	private String replycode;
	
	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getReplycode() {
		return replycode;
	}

	public void setReplycode(String replycode) {
		this.replycode = replycode;
	}

	@Override
	public int describeContents() {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public void writeToParcel(Parcel dest, int flags) {
		// TODO Auto-generated method stub
		dest.writeString(name);
		dest.writeString(replycode);
	}
	
	public FriendET(){
		
	}
	
	public FriendET(Parcel source){
		this.name = source.readString();
		this.replycode = source.readString();
	}
	
	public static final Parcelable.Creator<FriendET> CREATOR = new Parcelable.Creator<FriendET>(){

		@Override
		public FriendET createFromParcel(Parcel source) {
			// TODO Auto-generated method stub
			return new FriendET(source);
		}

		@Override
		public FriendET[] newArray(int size) {
			// TODO Auto-generated method stub
			return new FriendET[size];
		}
		
	};
	
	@Override
	public String toString() {
		return "FriendET [" + "name=" + name + ", FriendUserID=" + this.getFriendUserID()
				+ ", replycode=" + replycode 
				+ "]";
	}

}

Service：

if(fet != null){
					//记录一个friendAppSize，是希望当好友申请数量改变时再发送广播，而不是每次都发送广播。
					if(friendAppSize != fet.size()){
						//不相等则保存申请人数大小，发广播更新UI。
						friendAppSize = fet.size();
						Intent intent = new Intent(Constants.ACTION_SHOW_MSGCOUNT);
						intent.putExtra(Constants.MASK_FIELD, MaskType.CMD_FRIEND_APP);
						intent.putExtra(Constants.MSGCOUNT_FIELD, friendAppSize);
						intent.putParcelableArrayListExtra(Constants.DATA_APP_FIELD, (ArrayList<? extends Parcelable>)fet);
						CoreService.this.sendBroadcast(intent);
					}
				}

Receiver：

@Override
	public void onReceive(Context context, Intent intent) {
		String action = intent.getAction();
		MyTrace.d(LOGTAG, MyTrace.getFileLineMethod(), "action=" + action);
		
		if (Constants.ACTION_SHOW_MSGCOUNT.equals(action)) {
			char mask = intent.getCharExtra(Constants.MASK_FIELD, '0');
			int count = intent.getIntExtra(Constants.MSGCOUNT_FIELD, 0);
			ArrayList<? extends Parcelable> list = intent.getParcelableArrayListExtra(Constants.DATA_APP_FIELD);
			MyTrace.d(LOGTAG, MyTrace.getFileLineMethod(), "MSGCOUNT=" + count);
			if(count > 0){
				Message msg = mHandler.obtainMessage();
				msg.arg1 = count;
				msg.arg2 = mask;
				msg.obj = list;
				mHandler.sendMessage(msg);
			}
		
		}

	}