Android英文文档翻译系列(6)——LocalBroadcastManager
public class
LocalBroadcastManager
extends Object
java.lang.Object | |
? | android.support.v4.content.LocalBroadcastManager |
Class Overview
Helper to register for and send broadcasts of Intents to local objects within your process. This is has a number of advantages over sending global broadcasts withsendBroadcast(Intent)
:
- You know that the data you are broadcasting won‘t leave your app, so don‘t need to worry about leaking private data.
- It is not possible for other applications to send these broadcasts to your app, so you don‘t need to worry about having security holes they can exploit.
- It is more efficient than sending a global broadcast through the system.
Summary
Public Methods | |||||||||||
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static LocalBroadcastManager | getInstance(Context context) | ||||||||||
void | registerReceiver(BroadcastReceiver receiver, IntentFilter filter)
Register a receive for any local broadcasts that match the given IntentFilter.
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boolean | sendBroadcast(Intent intent)
Broadcast the given intent to all interested BroadcastReceivers.
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void | sendBroadcastSync(Intent intent)
Like
sendBroadcast(Intent) , but if there are any receivers for the Intent this function will block and immediately dispatch them before returning. |
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void | unregisterReceiver(BroadcastReceiver receiver)
Unregister a previously registered BroadcastReceiver.
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Inherited Methods
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From class java.lang.Object
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Public Methods
public void registerReceiver (BroadcastReceiver receiver, IntentFilter filter)
Register a receive for any local broadcasts that match the given IntentFilter.
Parameters
receiver | The BroadcastReceiver to handle the broadcast. |
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filter | Selects the Intent broadcasts to be received. |
public boolean sendBroadcast (Intent intent)
Broadcast the given intent to all interested BroadcastReceivers. This call is asynchronous; it returns immediately, and you will continue executing while the receivers are run.
Parameters
intent | The Intent to broadcast; all receivers matching this Intent will receive the broadcast. |
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public void sendBroadcastSync (Intent intent)
Like sendBroadcast(Intent)
, but if there are any receivers for the Intent this function will block and immediately dispatch them before returning.
public void unregisterReceiver (BroadcastReceiver receiver)
Unregister a previously registered BroadcastReceiver. All filters that have been registered for this BroadcastReceiver will be removed.
Parameters
receiver | The BroadcastReceiver to unregister. |
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