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【转】 android之如何在两个activity之间传递handler_利用broadcast广播机制
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原文：http://blog.csdn.net/jason0539/article/details/18075293
這算是如何在兩個(gè)activity之間傳遞handler的解決方案二了，解決方案一見http://blog.csdn.net/jason0539/article/details/18055259
再重復(fù)一遍我遇到的問題，就是在MainActivity里面打開AnotherActivity去執(zhí)行一些操作，相應(yīng)的改變MainActivity里的一些布局或者執(zhí)行一些動(dòng)作，最開始想到的就是把MainActivity的Handler直接傳給AnotherActivity，好像不可行，就有了這篇和上一篇文章。
上一篇方案一是通過重寫application來在兩個(gè)activity之間共享Handler的，今天這個(gè)方案是通過廣播機(jī)制解決本來想要通過傳遞handler來實(shí)現(xiàn)的功能，算是Activity之間傳遞Handler問題的變通方案，
?
其實(shí)很簡(jiǎn)單，就是Broadcast的應(yīng)用，替換了原來想要通過共享handler解決的思路。
代碼如下：
MainActivity：
[java]?view plaincopyprint?
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)?{??????????????????????????????????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)?{??????????????????????????textView.setText(intent.getExtras().getString("data"));??????????}??????};????????protected?void?onDestroy()?{??????????unregisterReceiver(broadcastReceiver);??????};??}??
AnotherActivity：
[java]?view plaincopyprint?
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)?{??????????????????super.onCreate(savedInstanceState);??????????setContentView(R.layout.another);??????????update?=?(Button)?findViewById(R.id.updateMain);??????????update.setOnClickListener(new?OnClickListener()?{????????????????@Override??????????????public?void?onClick(View?v)?{??????????????????????????????????Intent?intent?=?new?Intent(action);??????????????????intent.putExtra("data",?"yes?i?am?data");??????????????????sendBroadcast(intent);??????????????????finish();??????????????}??????????});??????}??}??
轉(zhuǎn)載于:https://www.cnblogs.com/mochaMM/p/5125099.html
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