blocks|key|809794|text|在你的onCreate方法中，你可以像这样注册一个接收器：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|809795|private+BroadcastReceiver+receiver;

@Override
public+void+onCreate(Bundle+savedInstanceState){

++//+your+oncreate+code+should+be

++IntentFilter+filter+=+new+IntentFilter();
++filter.addAction("SOME_ACTION");
++filter.addAction("SOME_OTHER_ACTION");

++receiver+=+new+BroadcastReceiver()+{
++++@Override
++++public+void+onReceive(Context+context,+Intent+intent)+{
++++++//do+something+based+on+the+intent's+action
++++}
++};
+++++registerReceiver(receiver,+filter);
}|code-block|syntax|javascript|809796|请记住在onDestroy方法中运行以下代码：|809797|+@Override
+protected+void+onDestroy()+{
++if+(receiver+!=+null)+{
+++unregisterReceiver(receiver);
+++receiver+=+null;
++}
++super.onDestroy();
+}|809798|entityMap^0|3|8|0|0|4|9|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|P|$]]

In your <code>onCreate</code> method you can register a receiver like this:

<pre><code>private BroadcastReceiver receiver;

@Override
public void onCreate(Bundle savedInstanceState){

 // your oncreate code should be

 IntentFilter filter = new IntentFilter();
 filter.addAction("SOME_ACTION");
 filter.addAction("SOME_OTHER_ACTION");

 receiver = new BroadcastReceiver() {
 @Override
 public void onReceive(Context context, Intent intent) {
 //do something based on the intent's action
 }
 };
 registerReceiver(receiver, filter);
}
</code></pre>

Remember to run this in the <code>onDestroy</code> method:

<pre><code> @Override
 protected void onDestroy() {
 if (receiver != null) {
 unregisterReceiver(receiver);
 receiver = null;
 }
 super.onDestroy();
 }
</code></pre>

blocks|key|1024682|text|听起来您想要控制清单中发布的组件是否处于活动状态，而不是在运行时动态注册接收器(通过Context.registerReceiver())。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1024683|如果是这样，您可以使用PackageManager.setComponentEnabledSetting()来控制这些组件是否处于活动状态：|1024684|http://developer.android.com/reference/android/content/pm/PackageManager.html#setComponentEnabledSetting(android.content.ComponentName,+int,+int)|offset|length|1024685|注如果您只对在运行时接收广播感兴趣，最好使用registerReceiver()。接收器组件主要用于需要确保每次发送广播时都启动应用程序的情况。|1024686|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/content/pm/PackageManager.html#setComponentEnabledSetting%2528android.content.ComponentName,%2520int,%2520int%2529^0|0|0|0|41|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@$F|U|G|V|1|W]]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

It sounds like you want to control whether components published in your manifest are active, not dynamically register a receiver (via Context.registerReceiver()) while running.

If so, you can use PackageManager.setComponentEnabledSetting() to control whether these components are active:

<a href="http://developer.android.com/reference/android/content/pm/PackageManager.html#setComponentEnabledSetting%28android.content.ComponentName,%20int,%20int%29" rel="noreferrer">http://developer.android.com/reference/android/content/pm/PackageManager.html#setComponentEnabledSetting(android.content.ComponentName, int, int)</a>

Note if you are only interested in receiving a broadcast while you are running, it is better to use registerReceiver(). A receiver component is primarily useful for when you need to make sure your app is launched every time the broadcast is sent.

blocks|key|809875|text|在Activity/Fragment中的任意位置定义广播接收器，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|809876|mReceiver+=+new+BroadcastReceiver()+{
+@Override
+public+void+onReceive(Context+context,+Intent+intent)+{
+++++Log.d(TAG,"+onRecieve");+//do+something+with+intent
+++}
+};|code-block|syntax|javascript|809877|在onCreate()中定义IntentFilter|offset|length|style|CODE|809878|mIntentFilter=new+IntentFilter("action_name");|809879|现在在onResume()中注册BroadcastReciever，并在onPause()中注销它，因为如果活动暂停，则不会使用广播。|809880|@Override
protected+void+onResume()+{
+++++super.onResume();
+++++registerReceiver(mReceiver,+mIntentFilter);
}

@Override
protected+void+onPause()+{
++++if(mReceiver+!=+null)+{
++++++++++++unregisterReceiver(mReceiver);
++++++++++++mReceiver+=+null;
++++}
++++super.onPause();
}|809881|有关详细教程，请查看broadcast+receiver-two+ways+to+implement。|809882|entityMap|0|LINK|mutability|MUTABLE|url|http://sohailaziz05.blogspot.com/2012/05/broadcast-receiver-two-ways-to.html^0|0|0|1|A|0|0|3|A|10|9|0|0|A|14|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@$I|15|J|16|K|L]]|9|@]|A|$]]|$1|M|3|N|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|18|8|@$I|19|J|1A|K|L]|$I|1B|J|1C|K|L]]|9|@]|A|$]]|$1|Q|3|R|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1E|8|@]|9|@$I|1F|J|1G|1|1H]]|A|$]]|$1|U|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11]]]]

Define a broadcast receiver anywhere in Activity/Fragment like this:

<pre><code>mReceiver = new BroadcastReceiver() {
 @Override
 public void onReceive(Context context, Intent intent) {
 Log.d(TAG," onRecieve"); //do something with intent
 }
 };
</code></pre>

Define IntentFilter in <code>onCreate()</code>

<pre><code>mIntentFilter=new IntentFilter("action_name");
</code></pre>

Now register the BroadcastReciever in <code>onResume()</code> and Unregister it in <code>onPause()</code> [because there is no use of broadcast if the activity is paused]. 

<pre><code>@Override
protected void onResume() {
 super.onResume();
 registerReceiver(mReceiver, mIntentFilter);
}

@Override
protected void onPause() {
 if(mReceiver != null) {
 unregisterReceiver(mReceiver);
 mReceiver = null;
 }
 super.onPause();
}
</code></pre>

For detail tutorial, have a look at <a href="http://sohailaziz05.blogspot.com/2012/05/broadcast-receiver-two-ways-to.html" rel="noreferrer">broadcast receiver-two ways to implement</a>.

blocks|key|809898|text|package+com.example.broadcastreceiver;


import+android.app.Activity;
import+android.content.IntentFilter;
import+android.os.Bundle;
import+android.view.Menu;
import+android.view.View;
import+android.widget.Toast;

public+class+MainActivity+extends+Activity+{

+++UserDefinedBroadcastReceiver+broadCastReceiver+=+new+UserDefinedBroadcastReceiver();

+++@Override
+++public+void+onCreate(Bundle+savedInstanceState)+{
++++++super.onCreate(savedInstanceState);
++++++setContentView(R.layout.activity_main);
+++}

+++@Override
+++public+boolean+onCreateOptionsMenu(Menu+menu)+{
++++++getMenuInflater().inflate(R.menu.main,+menu);
++++++return+true;
+++}

+++/**
++++*+This+method+enables+the+Broadcast+receiver+for
++++*+"android.intent.action.TIME_TICK"+intent.+This+intent+get
++++*+broadcasted+every+minute.
++++*
++++*+@param+view
++++*/
+++public+void+registerBroadcastReceiver(View+view)+{

++++++this.registerReceiver(broadCastReceiver,+new+IntentFilter(
++++++++++++"android.intent.action.TIME_TICK"));
++++++Toast.makeText(this,+"Registered+broadcast+receiver",+Toast.LENGTH_SHORT)
++++++++++++.show();
+++}

+++/**
++++*+This+method+disables+the+Broadcast+receiver
++++*
++++*+@param+view
++++*/
+++public+void+unregisterBroadcastReceiver(View+view)+{

++++++this.unregisterReceiver(broadCastReceiver);

++++++Toast.makeText(this,+"unregistered+broadcst+receiver",+Toast.LENGTH_SHORT)
++++++++++++.show();
+++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|809899|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>package com.example.broadcastreceiver;


import android.app.Activity;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

 UserDefinedBroadcastReceiver broadCastReceiver = new UserDefinedBroadcastReceiver();

 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 getMenuInflater().inflate(R.menu.main, menu);
 return true;
 }

 /**
 * This method enables the Broadcast receiver for
 * "android.intent.action.TIME_TICK" intent. This intent get
 * broadcasted every minute.
 *
 * @param view
 */
 public void registerBroadcastReceiver(View view) {

 this.registerReceiver(broadCastReceiver, new IntentFilter(
 "android.intent.action.TIME_TICK"));
 Toast.makeText(this, "Registered broadcast receiver", Toast.LENGTH_SHORT)
 .show();
 }

 /**
 * This method disables the Broadcast receiver
 *
 * @param view
 */
 public void unregisterBroadcastReceiver(View view) {

 this.unregisterReceiver(broadCastReceiver);

 Toast.makeText(this, "unregistered broadcst receiver", Toast.LENGTH_SHORT)
 .show();
 }
}
</code></pre>

blocks|key|809938|text|最佳实践是在注册接收方时始终提供权限，否则您将收到任何发送匹配意图的应用程序的许可。这可能会允许恶意应用程序广播到您的接收器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|809939|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

It is best practice to always supply the permission when registering the receiver, otherwise you will receive for any application that sends a matching intent. This can allow malicious apps to broadcast to your receiver.

I'd like to know what is the best practice/way of programmatically register a broadcast receiver. I want to register specific receivers according to user choice.

As the registration is done through the manifest file, I'm wondering if there's a proper way to achieve this in code.

Programmatically register a broadcast receiver

我想知道以编程方式注册广播接收器的最佳实践/方法是什么。我想根据用户的选择注册特定的接收者。由于注册是通过清单文件完成的，我想知道在代码中是否有合适的方法来实现这一点。

问以编程方式注册广播接收器
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