正与每个活动的好做法（基于Android工作室）的片段？

问题描述：

在新的Android工作室，每次我创建向导将创建以下结构的活动：

In the new Android Studio, every time I create an activity from the wizard it will create the following structure:

public class LoginActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);

        if (savedInstanceState == null) {
            getFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_settings:
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_login, container, false);
            return rootView;
        }
    }

}

公告有活性，它含有一个片断占位符。这被认为是一个好的做法呢？这是因为，如果你将来想支持平板电脑或更换片段，那么你可以（这就是为什么它在机器人工作室新的默认？）。

Notice there's the activity and it contains a fragment place holder. Is this considered a good practice? is it because if you wanted in the future to support tablets or replace fragment then you could (and thats why its the new default in Android studio?).

答

一般来说，是的，你应该尝试使用尽可能多的片段，这样你可以有不同的布局不同大小/宽高比设备。

Generally speaking, yes, you should try to use fragments as much as possible, so that you can have different layouts for different size / aspect ratio devices.

是的，这就是为什么Android的Studio生成code这样在默认情况下。

And yes, that's why Android Studio generates code that way by default.

然而，像任何好的规则，也有例外。有时，一个活动是简单的，不会在不同的设备不同。在这种情况下，一个片段不一定能使感。

However, like any good rule, there are exceptions. Sometimes, an activity is simple, and will not differ on different devices. In that case, a fragment doesn't necessarily make sense.

总之，在默认情况下使用的片段。去只有在少数情况下一个活动的地方，使您的项目中感觉你。

In short, use fragments by default. Go with just an activity in the few cases where it makes sense you in your project.

正与每个活动的好做法（基于Android工作室）的片段？

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