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;
@Override
protected 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() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(MainActivity.this,AnotherActivity.class));
}
});
IntentFilter filter = new IntentFilter(AnotherActivity.action);
registerReceiver(broadcastReceiver, filter);
}
BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
textView.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;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.another);
update = (Button) findViewById(R.id.updateMain);
update.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(action);
intent.putExtra(data, yes i am data);
sendBroadcast(intent);
finish();
}
});
}
}
代码地址：http://download.csdn.net/detail/jason0539/6832899
作者：jason0539
微博：http://weibo.com/2553717707
博客：http://blog.csdn.net/jason0539（转载请说明出处）
