Question

AlertDialog.Builder那个黑背景怎么消除掉

Answer 1

builder的theme如此设置就行了
<style name="DuiaAlertDialogBackground" parent="@android:style/Theme.DeviceDefault.Light.Dialog">
<item name="android:background">@android:color/transparent</item>
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowContentOverlay">@null</item>
<item name="android:windowIsFloating">true</item>
<item name="android:windowFrame">@null</item>
<item name="android:backgroundDimEnabled">true</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowIsTranslucent">true</item>
<item name="android:centerDark">@color/transparent</item>
<item name="android:windowAnimationStyle">@android:style/Animation.Translucent</item>
</style>

Answer 2

// 显示透明的对话框
4. AlertDialog alertDialog = new AlertDialog.Builder(this).setMessage(
5. "透明对话框").setPositiveButton("确定", null).create();
6. Window window = alertDialog.getWindow();
7. WindowManager.LayoutParams lp = window.getAttributes();
8. // 设置透明度为0.3
9. lp.alpha = 0.6f;
10. window.setAttributes(lp);
11. alertDialog.show();

Answer 3

不用alertDialog，可以尝试使用Dialog