安卓：活动之间共享数据 [英] Android: sharing data between activities
问题描述
我编程一个Android应用程序，执行以下操作（简言之）：
I am programming an android app that does the following (in a nutshell):
- 在创建监听到的数据通过蓝牙流活动
- 在解析流中的数据
- （计划）显示PTED数据含义的相互$ P $，像图/文
有关＃3，我打算创建一个坐在蓝牙流活动之上的新的活动 - 毕竟，蓝牙事项应在后初始设置背景
For #3, I am planning to create a new activity that sits on top of the Bluetooth Streaming activity -- afterall, the bluetooth matters should be in the background after initial set up.
不过，我有BT的活动和展示活动之间发送的数据的问题。
However, I am having issues sending the data between the BT activity and the display activity.
我用Google搜索，研究和最好的我能想出使用意图这一点，但它不工作。
I have googled, researched and the best I can come up with is using Intents for this, but its not working.
下面是一个例子。假设数据进来，我跨preT的数据涉及身体的运动：
Here is an example. Say data is coming in and I interpret the data involve body movement:
private BodyMovementPositionStream() {
if (getActivity() != null && getContext() != null && iDebug == null) {
iDebug = new Intent(getActivity(), AGDebug.class);
iDebug.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
new Thread(new Runnable() {
public void run() {
if (theApplication.isD()) {
Log.d(theApplication.getTAG(), "Creating Intent for Position Debuging...");
getContext().registerReceiver(new AGDReceiver(), new IntentFilter("com.ekscsy.sleepstudy.debug.AGDebug"));
getContext().startActivity(iDebug);
}
}
}).start();
}
}
因此，基本上，在剪断-它，我开始活动AGDebug，新的任务添加了标记，然后我注册一个新线程的接收器。这工作，我看到它在我的手机和 Log.d（）信息显示出来。
后来在我的code，我提取数据：
Later on in my code, I extract the data:
private static final int fSize = 4;
public void unpack(byte[] data) {
int i = -fSize;
accx = Streams.byteArr2ByteBuff(data, i += fSize, fSize).order(null).getFloat();
accy = Streams.byteArr2ByteBuff(data, i += fSize, fSize).order(null).getFloat();
accz = Streams.byteArr2ByteBuff(data, i += fSize, fSize).order(null).getFloat();
gyrox = Streams.byteArr2ByteBuff(data, i += fSize, fSize).order(null).getFloat();
gyroy = Streams.byteArr2ByteBuff(data, i += fSize, fSize).order(null).getFloat();
gyroz = Streams.byteArr2ByteBuff(data, i += fSize, fSize).order(null).getFloat();
temp = Streams.byteArr2ByteBuff(data, i += fSize, fSize).order(null).getFloat();
Intent intent = new Intent("com.ekscsy.sleepstudy.debug.AGDReceiver");
intent.putExtra("com.ekscsy.sleepstudy.debug.AGDebug.accxF", accx);
getContext().sendBroadcast(intent);
}
在提取结束时，我提出一个新的目标， .putExtra（）包+有一些数据的浮动的名称。我做的 .sendBroadcast（）但是......没有任何反应。我有一个永远不会被调用断点：
At the end of the extraction, I make a new intent, .putExtra() the name of the package + a float with some data. I do the .sendBroadcast() but... nothing happens. I have a breakpoint that never gets called:
public class AGDReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
assert(true); //breakpoint here
}
}
很显然，我缺少的步骤在这里，但我似乎无法找到活动之间共享数据的任何有用信息。
Obviously, I am missing steps here, but I can't seem to find any good information on sharing data between activities.
其实，让我重新迭代，这里的主要目标是活动之间的共享数据。数据显示，作为花车，整数，等我假设这样的Android的方式是通过意图和广播，但如果有更好的方法，我所有的耳朵。
In fact, let me re-iterate, the main goal here is the share data between activities. Data, being floats, ints, etc. I am assuming the "Android" way of doing this is through intents and broadcast, but if there is a better method, I am all ears.
我期待以与API 8这个应用程序兼容。
I am looking to make this app compatible with API 8.
编辑：仅供参考，我改变了code采取AGDebug活动开始了自己的线程。它看起来更象现在这样：
FYI, I changed the code to take the start of the AGDebug activity out of its own thread. It looks more like this now:
if (getActivity() != null && getContext() != null && iDebug == null) {
iDebug = new Intent(getActivity(), AGDebug.class);
iDebug.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Log.d(theApplication.getTAG(), "Creating Intent for Position Debuging...");
getContext().registerReceiver(new AGDReceiver(), new IntentFilter("com.ekscsy.sleepstudy.debug.AGDebug"));
getContext().startActivity(iDebug);
}
仍然没有虽然改变任何东西。我想也许有不同的运行手动创建的线程之间的活动的问题。
Still didn't change anything though. I thought maybe there was an issue of running the activity between different manually created threads.
主要更新/新的问题：
我发现这个指南 http://www.sohailaziz.com/ 2012/04 / localbroadcastmanager-内application.html ，并能够成功实施使与LocalBroadcastManager广播工作的战略。但是...这是非常奇怪的......我发现了 onReceieve（）方法被有时候还是不叫。 IOW：当我运行的应用程序，要么将调用每一个我说 lbm.sendBroadcast（意向），否则它将不会被调用在所有时间
I found this guide http://www.sohailaziz.com/2012/04/localbroadcastmanager-intra-application.html and was able to successfully implement its strategy of making the broadcaster work with the LocalBroadcastManager. However... and this is very weird... I am finding the onReceieve() method gets called sometimes or not. IOW: when I run the app, either it will get called each time I say lbm.sendBroadcast(intent) or it won't get called at all.
很令人费解。
最后编辑： 好吧，我得到它的工作。有确保每个意图正确，点名叫到正确的位置的微妙的艺术。一旦这样做，它似乎是一致的。
Final Okay I got it to work. There is a delicate art of making sure each intent is named correctly and points to the right spot. Once done, it seems to be consistent.
推荐答案
您注册的广播接收器是这样的：
You register the broadcast receiver like this:
getContext().registerReceiver(new AGDReceiver(),
new IntentFilter("com.ekscsy.sleepstudy.debug.AGDebug"));
但广播这个通知：
but you broadcast this Intent:
Intent intent = new Intent("com.ekscsy.sleepstudy.debug.AGDReceiver");
在意图的操作是不一样的。如果你定义，你可以节省自己这个麻烦不断的对于这一点，即：
The actions in the Intents are not the same. You could have saved yourself this trouble if you defined a constant for this, ie:
public static final String MY_INTENT_ACTION = "com.ekscsy.sleepstudy.debug.AGDReceiver";
，然后使用该常量，当你创建广播意图，当你创建意图过滤器用于注册的广播接收器。
and then used that constant when you create the broadcast intent and when you create the intent filter for registering the broadcast receiver.
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