如何使用/定位在谷歌文档和服务广播文档中描述的LocalBroadcastManager ?
我试着谷歌它,但没有可用的代码开始?
文档说,我应该使用它,如果我想做广播内部与我的应用程序的进程,但我不知道在哪里寻找这个。
任何帮助/评论?
更新:我知道如何使用广播,但不知道如何在我的项目中获得LocalBroadcastManager。
如何使用/定位在谷歌文档和服务广播文档中描述的LocalBroadcastManager ?
我试着谷歌它,但没有可用的代码开始?
文档说,我应该使用它,如果我想做广播内部与我的应用程序的进程,但我不知道在哪里寻找这个。
任何帮助/评论?
更新:我知道如何使用广播,但不知道如何在我的项目中获得LocalBroadcastManager。
当前回答
接收端:
First register LocalBroadcast Receiver Then handle incoming intent data in onReceive. @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(this); lbm.registerReceiver(receiver, new IntentFilter("filter_string")); } public BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (intent != null) { String str = intent.getStringExtra("key"); // get all your data from intent and do what you want } } };
发送端:
Intent intent = new Intent("filter_string");
intent.putExtra("key", "My Data");
// put your all data using put extra
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
其他回答
我更愿意全面地回答。
LocalbroadcastManager included in android 3.0 and above so you have to use support library v4 for early releases. see instructions here Create a broadcast receiver: private BroadcastReceiver onNotice= new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { // intent can contain anydata Log.d("sohail","onReceive called"); tv.setText("Broadcast received !"); } }; Register your receiver in onResume of activity like: protected void onResume() { super.onResume(); IntentFilter iff= new IntentFilter(MyIntentService.ACTION); LocalBroadcastManager.getInstance(this).registerReceiver(onNotice, iff); } //MyIntentService.ACTION is just a public static string defined in MyIntentService. unRegister receiver in onPause: protected void onPause() { super.onPause(); LocalBroadcastManager.getInstance(this).unregisterReceiver(onNotice); } Now whenever a localbroadcast is sent from applications' activity or service, onReceive of onNotice will be called :).
编辑:你可以在这里阅读完整的教程LocalBroadcastManager:内部应用程序消息传递
一个实现LocalBroadcastManager的Activity和Service的例子可以在开发者文档中找到。我个人觉得它非常有用。
编辑:该链接已从网站上删除,但数据如下: https://github.com/carrot-garden/android_maven-android-plugin-samples/blob/master/support4demos/src/com/example/android/supportv4/content/LocalServiceBroadcaster.java
当你玩够了LocalBroadcastReceiver的时候,我会建议你试试Green Robot的EventBus——你一定会意识到它与LBR的区别和有用性。更少的代码,可定制关于接收者的线程(UI/Bg),检查接收者的可用性,粘性事件,事件可以用作数据传递等。
在Eclipse中,最终我不得不通过右键单击我的项目并选择添加兼容性/支持库:
Android工具->添加支持库
一旦添加了它,我就可以在代码中使用LocalBroadcastManager类了。
enter code here if (createSuccses){
val userDataChange=Intent(BRODCAST_USER_DATA_CHANGE)
LocalBroadcastManager.getInstance(this).sendBroadcast(
userDataChange
)
enableSpinner(false)
finish()