与AlertDialog不同，DialogFragment的宽度占据整个屏幕

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.dialog_fragment_layout, container, false);
    // 设置布局的宽度为屏幕宽度
    WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams();
    layoutParams.copyFrom(getDialog().getWindow().getAttributes());
    layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
    getDialog().getWindow().setAttributes(layoutParams);
    return view;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(DialogFragment.STYLE_NORMAL, R.style.DialogFragmentStyle);
}

<style name="DialogFragmentStyle" parent="Theme.AppCompat.Light.Dialog">
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowAnimationStyle">@style/DialogFragmentAnimation</item>
    <item name="android:windowMinWidthMajor">100%</item>
    <item name="android:windowMinWidthMinor">100%</item>
</style>