Android 片段显示为对话框片段或普通片段

我想要实现的是有一个片段，在平板电脑上显示为DialogFragment，而在智能手机上它将显示为常规片段。我知道已经有一个类似的帖子，但我无法做到这一点 - 将样式应用于片段。

为了自上而下地显示内容，MainActivity.java：

public class MainActivity extends ActionBarActivity {

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

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == R.id.action_next) {
            decideToNext();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private void decideToNext() {
        String device = getString(R.string.device);
        if ("normal".equalsIgnoreCase(device)) {
            Intent intent = new Intent(this, DetailedActivity.class);
            startActivity(intent);
        } else if ("large".equalsIgnoreCase(device)) {
            Log.d("SOME_TAG", "Yes, I am seeing this line on tablet only");
            DetailedFragment fragment = DetailedFragment.newInstance();
            getSupportFragmentManager().beginTransaction().add(fragment, "MAGIC_TAG").commit();
        }
    }

}

详细的活动没什么太多：

public class DetailedActivity extends ActionBarActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.detailed_activity);
    }
}

它的布局：

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/root_container"
    android:name="com.myapps.sampleandroid.DetailedFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

和有趣的DetailedFragment:

public class DetailedFragment extends Fragment {

    public static DetailedFragment newInstance() {
        return new DetailedFragment();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        Context contextThemeWrapper = new ContextThemeWrapper(getActivity(), R.style.MyDialogTheme);
        LayoutInflater localInflater = inflater.cloneInContext(contextThemeWrapper);
        return localInflater.inflate(R.layout.detailed_fragment, container, false);
    }
}

...及其布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Regular Text" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button Dummy" />

</LinearLayout>

In onCreateView我尝试设置自定义样式，但它似乎不适用于平板电脑。

Styling

res/values/styles.xml 包含：

<resources>

    <style name="AppTheme" parent="@style/Theme.AppCompat.Light.DarkActionBar">
    </style>

    <style name="MyDialogTheme" />

</resources>

而 res/values-large/styles.xml:

<resources>
    <!-- Is there anything I should add here? -->
    <style name="MyDialogTheme" parent="@android:style/Theme.Dialog"/>
</resources>

我已经嵌套了MyDialogTheme from Theme.Dialog，但似乎没有帮助。

On smartphone when tapping on "NEXT" action bar menu item I am seeing the detailed activity (snapshot from an SG2):

while tapping on the same "NEXT" menu item from the tablet it doesn't do anything (except viewing the message on Logcat: Yes, I am seeing this line).

我应该在 styles.xml 或代码中添加更多内容才能看到DetailedFragment作为平板电脑的对话框？

EDIT

我已经尝试过解决方案小孩儿提议（有一个DialogFragment包含我的初始片段并显示它）。所以，我添加了一个WrapperDetailedFragment:

public class WraperDetailedFragment extends DialogFragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.wrap_detailed_fragment, container, false);
    }
}

它的布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/root_container_dialog"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <fragment
        android:id="@+id/wrapped_fragment_id"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        class="com.myapps.sampleandroid.DetailedFragment" />

</LinearLayout>

MainActivity 中的代码更改为：

private void decideToNext() {
    String device = getString(R.string.device);
    if ("normal".equalsIgnoreCase(device)) {
        Intent intent = new Intent(this, DetailedActivity.class);
        startActivity(intent);
    } else if ("large".equalsIgnoreCase(device)) {
        Log.d("SOME_TAG", "Yes, I am seeing this line ...");
        WraperDetailedFragment fragment = new WraperDetailedFragment();
        fragment.show(getSupportFragmentManager(), "MAGICAL_TAG");
    }
}

但是当我尝试添加此 DialogFragment 时，出现以下崩溃：

android.view.InflateException: Binary XML file line #8: Error inflating class fragment
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
    at com.myapps.sampleandroid.WraperDetailedFragment.onCreateView(WraperDetailedFragment.java:12)
    at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1082)
    at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:304)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
    at com.myapps.sampleandroid.WraperDetailedFragment.onCreateView(WraperDetailedFragment.java:12)
    at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1460)
    at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:440)
    at android.os.Handler.handleCallback(Handler.java:615)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:4745)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: Binary XML file line #8: Duplicate id 0x7f050047, tag null, or parent id 0x0 with another fragment for com.myapps.sampleandroid.DetailedFragment
    at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:290)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
    ... 28 more

这个问题可以很容易地解决，如果不是尝试做一个Fragment看起来像一个DialogFragment我会从相反的角度看：做一个DialogFragment看起来像一个Fragment- 毕竟，一个DialogFragment is a Fragment!

这个修复的关键是调用还是不调用DialogFragment.setShowsDialog();

所以改变DetailedFragment to:

public class DetailedFragment extends DialogFragment {

    private static final String ARG_SHOW_AS_DIALOG = "DetailedFragment.ARG_SHOW_AS_DIALOG";

    public static DetailedFragment newInstance(boolean showAsDialog) {
        DetailedFragment fragment = new DetailedFragment();
        Bundle args = new Bundle();
        args.putBoolean(ARG_SHOW_AS_DIALOG, showAsDialog);
        fragment.setArguments(args);
        return fragment;
    }

    public static DetailedFragment newInstance() {
        return newInstance(true);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Bundle args = getArguments();
        if (args != null) {
            setShowsDialog(args.getBoolean(ARG_SHOW_AS_DIALOG, true));
        }
    }

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

它的布局保持原样，DetailedActivity更改为：

public class DetailedActivity extends ActionBarActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.detailed_activity);
        if (savedInstanceState == null) {
            DetailedFragment fragment = DetailedFragment.newInstance(false);
            getSupportFragmentManager().beginTransaction().add(R.id.root_layout_details, fragment, "Some_tag").commit();
        }
    }
}

它的布局也是如此：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/root_layout_details"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

并且调用者活动仅执行以下操作：

private void decideToNext() {
    String device = getString(R.string.device);
    if ("normal".equalsIgnoreCase(device)) {
        Intent intent = new Intent(this, DetailedActivity.class);
        startActivity(intent);
    } else if ("large".equalsIgnoreCase(device)) {
        DetailedFragment fragment = DetailedFragment.newInstance();
        fragment.show(getSupportFragmentManager(), "Tablet_specific");
    }
}