这算是如何在两个activity之间传递handler的解决方案二了，解决方案一见
再重复一遍我遇到的问题，就是在MainActivity里面打开AnotherActivity去执行一些操作，相应的改变MainActivity里的一些布局或者执行一些动作，最开始想到的就是把MainActivity的Handler直接传给AnotherActivity，好像不可行，就有了这篇和上一篇文章。
上一篇方案一是通过重写application来在两个activity之间共享Handler的，今天这个方案是通过广播机制解决本来想要通过传递handler来实现的功能，算是Activity之间传递Handler问题的变通方案，
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：
package jason.broadcastinsteadofhanlderdemo;import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class MainActivity extends Activity {TextView textView;Button sButton;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);textView = (TextView) findViewById(R.id.show);sButton = (Button) findViewById(R.id.startAnother);sButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubstartActivity(new Intent(MainActivity.this,AnotherActivity.class));}});IntentFilter filter = new IntentFilter(AnotherActivity.action);registerReceiver(broadcastReceiver, filter);}BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubtextView.setText(intent.getExtras().getString("data"));}};protected void onDestroy() {unregisterReceiver(broadcastReceiver);};}
AnotherActivity：
package jason.broadcastinsteadofhanlderdemo;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class AnotherActivity extends Activity {public static final String action = "jason.broadcast.action";Button update;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.another);update = (Button) findViewById(R.id.updateMain);update.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent(action);intent.putExtra("data", "yes i am data");sendBroadcast(intent);finish();}});}}
当你感到悲哀痛苦时，最好是去学些什么东西。
