AppCompat v22.1.0 not theming all xml widgets corr

问题:

When using xml based layouts using AppCompat 22.1.0 not all supported widgets are tinted or material themed for my Fragments using Android 4.4.

I see this behavior with the following widgets (others not tested):

• RadioButton (No tint color)
• CheckBox (No tint color)
• Spinner (Device default theme is applied)
• EditText (Device default theme is applied)
• RatingBar (Device default theme is applied)
• Button (Device default theme is applied)

It used to work in AppCompat v22.0.0.

Screenshot (left 4.4, right 5.0):

MainActivity.java:

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (savedInstanceState == null) {
            getSupportFragmentManager()
                    .beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
    }

    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_main, container, false);
            return rootView;
        }
    }
}

fragment_main.xml

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

    <RadioButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="true"
        android:text="RadioButton test"/>

    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="true"
        android:text="CheckBox test"/>

    <Spinner
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:entries="@array/someStrings"/>
</LinearLayout>

Themes.xml

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

回答1:

This is currently reported as bug: https://code.google.com/p/android/issues/detail?id=169760

A temporary workaround is to use the Fragment parent Activity LayoutInflater: getActivity().getLayoutInflater() instead of the supplied LayoutInflater in the onCreateView method.

Example:

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

Note: Another solution is to use the special AppCompat widgets in your xml layout:

• android.support.v7.widget.AppCompatRadioButton
• android.support.v7.widget.AppCompatCheckBox
• android.support.v7.widget.AppCompatSpinner

But this would basically mean you need to replace every single widget with the AppCompat one.

回答2:

You can force the theme applied to views, only need to add these lines on the parent view:

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

Then all views inside the linear layout take the accent color declared to the respective activity in the manifest (Via theme).