您必须在对话框样式中设置android:windowIsFloating
为 false 和自定义颜色:android:windowBackground
样式.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>
测试对话片段
public class TestDialogFragment extends DialogFragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setStyle(DialogFragment.STYLE_NO_TITLE, R.style.MyDialog);
}
}