在两个activity间传值

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1、一、android开发之在activity中控制另一个activity的UI更新1.在MyAPP中定义属性handler[java]viewplaincopyprint?1packagejason.com;23importjason.com.MasterActivity.MyHandler;4importandroid.app.Application;56/**7*自己实现Application，实现数据共享8*@authorjason9*/10publicclassMyAPPextendsApplication{11//共享变量12privat

2、eMyHandlerhandler=null;1314//set方法15publicvoidsetHandler(MyHandlerhandler){16this.handler=handler;17}1819//get方法20publicMyHandlergetHandler(){21returnhandler;22}2324}2、在主activity中给MyAPP的属性handler赋值[java]viewplaincopyprint?25@Override26publicvoidonCreate(BundlesavedInstanceSta

3、te){2728super.onCreate(savedInstanceState);29setContentView(R.layout.main);30311mAPP=(MyAPP)getApplication();2handler=newMyHandler();3tv=(TextView)findViewById(R.id.tv);4btn_to=(Button)findViewById(R.id.btn_to);56//设置监听器7btn_to.setOnClickListener(newOnClickListener(){8@Overri

4、de9publicvoidonClick(Viewv){10//设置共享变量11mAPP.setHandler(handler);12//启动另一个Activity13Intentintent=newIntent(MasterActivity.this,14ToChangeViewActivity.class);15startActivity(intent);16}17});1819}3、在另一个activity中获取MyAPP中handler进行传值[java]viewplaincopyprint?20protectedvoidonCreate

5、(BundlesavedInstanceState){21super.onCreate(savedInstanceState);22setContentView(R.layout.show);2324mAPP=(MyAPP)getApplication();25//获得该共享变量实例26mHandler=mAPP.getHandler();27findViewById(R.id.btn_chang).setOnClickListener(newOnClickListener(){2829@Override30publicvoidonClick(V

6、iewv){31//发送消息32mHandler.sendEmptyMessage(CHANGED);33ToChangeViewActivity.this.finish();34}35});3637}二、android开发之如何在两个activity之间传递handler_利用broadcast广播机制其实很简单，就是Broadcast的应用，替换了原来想要通过共享handler解决的思路。代码如下：MainActivity：[java]viewplaincopyprint?1packagejason.broadcastinsteadofhan

7、lderdemo;23importandroid.app.Activity;4importandroid.content.BroadcastReceiver;5importandroid.content.Context;6importandroid.content.Intent;7importandroid.content.IntentFilter;8importandroid.os.Bundle;9importandroid.view.View;10importandroid.view.View.OnClickListener;11import

8、android.widget.Button;12importandroid.widget.TextView;1314publicclas