问题描述
我问你一个建议，我的应用程序。我要开发一个应用程序与此特点：
I ask you a suggestion for my application. I have to develop one app with this characteristics :
1只纵向
2 - 它显示的蓝牙设备presents打开应用程序时
2- when open the app it shows the bluetooth devices presents
3，当你点击一台设备上的应用程序要求用户解锁code和显示的连接按钮
3- when you click on one device the app ask to the user an unlock code and show the connect button
4-后preSS连接按钮，该应用程序显示蒙山两点三个按钮加载微调吧
4- after press connect button the app show a loading spinner bar whith two o three buttons
问题的关键是：是否有更好的，我用了三个不同的片段，每一个行为或不
现在我已经做了：
有关扫描设备的一个活动。
one activity for the scan device
有关解锁code一个活动
one activity for the unlock code
但我不知道我在哪里可以把加载屏幕（加载微调酒吧和三个按钮）
but i don't know where I can put the loading screen (loading spinner bar and the three buttons)
现在我想的发展方式不同。一个中心的活动，处理了3种不同的片段加载：
Now I'm thinking of develop in different way. One central activity that handles the loading of 3 different fragments :
-
另一个用于扫描设备
one for scan device
一个用于解锁code和一个用于加载屏幕
one for unlock code and one for loading screen
不过，我是新的Android的编程，我总是在想，如果我认为正确的方式或以错误的方式。
But I'm new in the Android programming, and I always wonder if I think in correct way or in the wrong way .
而在最后：从片段通讯所选择的设备，我想我会实现mainactivity一个监听活动。是不是？
And in last : for communicate the chosen device from fragment to the activity I think I will implement a listener in mainactivity. Is it right ?
****编辑：**。*我就主要问题的另一个疑问***
****EDIT :** *I have another doubt regarding the main question.***
现在你的建议后，我想开发这个应用程序，以这种方式：
Now after your advice I want develop this app in this way :
-
主要活动
Main Activity
- 在扫描设备片段
-
解锁设备片段
- Scan DEvice fragment
Unlock Device fragment
装载片段
在precedent版本，我想开发三种不同的活动，并使用粘结剂和messange在两个方向的方式来/从通信服务
In the precedent version I thought to develop three different activity and to use binder and messange to communicate in two direction way to/from the service
现在，而是有主要活动内三个不同的片段。我的问题是：？对你来说是更好地实施内部mainactivity或每一个片段内的交际到服务的
Now,instead, there are three different fragments inside the main activity. My question is : for you is better implement the comunication to the service inside mainactivity or inside every single fragment ?
有关例如：用户选择一个设备在扫描片段，该片段直接通信的的choise到服务或通信的的choise向其中将该信息转发给该服务的mainactivity
感谢您的时间：）
推荐答案
你的不可以使用的setContentView（）应用程序的切换状态，它可能会导致在 onBack pressed不一致问题（） - 利用片段来代替。但是，你会遇到在背部preSS的一个问题，所以你需要看看是否有留在你的活动上背部preSS，为此，你需要看到的 ContainerFragment在这个问题上。
Do not use setContentView() to change between states of the application, it can cause inconsistency problems on onBackPressed() - use fragments instead. But you will run into a problem on back press, so you will need to see if there are fragments left in your activity on back press, for which you will need to see http://stackoverflow.com/a/24527530/2413303 ContainerFragment in this question.
@Override
public void onCreate(Bundle saveInstanceState)
{
super.onCreate(saveInstanceState);
this.setContentView(R.layout.activity_container);
if (saveInstanceState == null)
{
getSupportFragmentManager().beginTransaction()
.add(R.id.activity_container_container, new ExampleFragment())
.addToBackStack(null)
.commit();
}
getSupportFragmentManager().addOnBackStackChangedListener(new OnBackStackChangedListener()
{
public void onBackStackChanged()
{
int backCount = getSupportFragmentManager().getBackStackEntryCount();
if (backCount == 0)
{
finish();
}
}
});
}
此外，使用 ButterKnife 库，我并没有在这个例子中，我联系，即使我应该有。它使code少得多冗长，做同样的事情。
Also, use ButterKnife library, I didn't in this example I linked, even though I should have. It makes the code much less verbose and do the same thing.
public class FancyFragment extends Fragment {
@InjectView(R.id.button1) Button button1;
@InjectView(R.id.button2) Button button2;
@OnClick(R.id.btnSubmit)
public void submit(View view) {
// TODO submit data to server...
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fancy_fragment, container, false);
ButterKnife.inject(this, view);
// TODO Use "injected" views...
return view;
}
}
和沟通，您可以使用奥托库按http://stackoverflow.com/a/28480952/2413303
And for communication, you can use Otto library as per http://stackoverflow.com/a/28480952/2413303
public class UpdateListEvent {
}
public class MainActivity extends ActionBarActivity {
...
public void updatelist() {
SingletonBus.INSTANCE.getBus().post(new UpdateListEvent());
}
}
public class FragmentA extends Fragment {
@Override
public void onResume() {
super.onResume();
SingletonBus.INSTANCE.getBus().register(this);
}
@Override
public void onPause() {
SingletonBus.INSTANCE.getBus().unregister(this);
super.onPause();
}
@Subscribe
public void onUpdateListEvent(UpdateListEvent e) {
//do things
}
}
public enum SingletonBus {
INSTANCE;
private Bus bus;
private SingletonBus() {
this.bus = new Bus(ThreadEnforcer.ANY);
}
public Bus getBus() {
return bus;
}
}
这篇关于机器人：使用片段或更改所有视图中的活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！