如何更改DialogFragment周围的背景颜色？

Question

我正在建立一个习惯DialogFragment.对话框布局设置为my_dialog.xml,但如何修改对话框周围的颜色(透明灰色)？

my_dialog.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center" >

    <TextView
        android:id="@+id/hello"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:background="@android:color/holo_orange_light"
        android:gravity="center"
        android:text="hello" />

</RelativeLayout>

MyDialogFragment.java

public class MyDialogFragment extends DialogFragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.my_dialog, container);

        getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);

        return view;
    }
}

Answer 1

我必须在对话框样式中设置android:windowIsFloating为false和android:windowBackground我的自定义颜色:

styles.xml

<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <style name="MyDialog" parent="@android:style/Theme.Dialog">
        <item name="android:windowFrame">@null</item>
        <item name="android:windowBackground">@color/orange_transparent</item>
        <item name="android:windowIsFloating">false</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowTitleStyle">@null</item>
        <item name="android:colorBackgroundCacheHint">@null</item>
        <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
        <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>
        <item name="android:gravity">center</item>
    </style>

</resources>

MyDialogFragment

public class MyDialogFragment extends DialogFragment {

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

Answer 2

我想要一个透明的背景DialogFragment,在代码中,这很好用:

@Override
public void onStart() {
    super.onStart();

    Window window = getDialog().getWindow();
    window.setBackgroundDrawableResource(android.R.color.transparent);
}

当然,您可以指定任何颜色或Drawable使用setBackgroundDrawable()或setBackgroundDrawableResource().

此作品至少在onStart(),但不是onCreate()必然的,而不是 onCreateView(),它似乎.

也就是说,在大多数情况下,使用样式在XML中执行此操作可能更为清晰:

<style name="MyDialogStyle" parent="@android:style/Theme.Holo.Light.Dialog">
    <item name="android:windowBackground">@android:color/transparent</item>
</style>

Answer 3

要获得完全透明的对话框,可以在onCreateView下面进行设置

• setBackgroundDrawable 至 Color.TRANSPARENT
• setDimAmount 至 0

请参阅此处的代码示例

public class TextEditor extends DialogFragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_text_editor, container);

        // make dialog itself transparent
        getDialog().getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));

        // remove background dim 
        getDialog().getWindow().setDimAmount(0);

        //[add more custom code here...]

        return view;
    }
}

Answer 4

我发现我只需要这样做:

<style name="MyDialog" parent="@android:style/Theme.Dialog">
    <!--  other attributes  -->
    <item name="android:backgroundDimEnabled">false</item>
</style>