学步园

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http://blog.csdn.net/jason0539/article/details/18055259

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）