Android中让Dialog全屏：
一、在style中定义样式：
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="Transparent">
<item name="android:windowBackground">@color/transparent_background</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowFullscreen">true</item>
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowAnimationStyle">@+android:style/Animation.Translucent</item>
</style>
</resources>
其中transparent_background为颜色值：#50000000，透明度为50
二、代码中定义Dialog时添加样式：
View myLoginView = LayoutInflater.from(mContext).inflate(R.layout.activity_answer_category, null); ListView cList = (ListView) myLoginView.findViewById(R.id.cagetoryList); cList.setAdapter(new Adapter()); alertDialog = new Dialog(mContext, R.style.Transparent); alertDialog.setContentView(myLoginView); alertDialog.show();