android 对话框Dialog背景透明

先看效果：





这是我做的一个拨号器强的面板，拨号的时候会查询手机中的联系人，显示在拨号面板上方，点击弹出透明对话框供选择。

这次重点是透明对话框。

先看对话框的theme，style文件：

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style
name="selectorDialog"
parent="@android:style/Theme.Dialog">
<item name="android:windowFrame">@null</item><!--边框-->
<item name="android:windowIsFloating">true</item><!--是否浮现在activity之上-->
<item name="android:windowIsTranslucent">false</item><!--半透明-->
<item name="android:windowNoTitle">true</item><!--无标题-->
<item name="android:windowBackground">@drawable/selector_dialog_bg</item><!--背景透明-->
<item name="android:backgroundDimEnabled">false</item><!--模糊-->
<item name="android:backgroundDimAmount">0.6</item>
</style>
</resources>

对话框背景@drawable/selector_dialog_bg：

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#333333"/>
<stroke
android:width="2dp"
android:color="#99CC33" />
<padding
android:left="5dp"
android:top="5dp"
android:right="5dp"
android:bottom="5dp" />
<corners android:radius="8dp" />
</shape>

然后是对话框的布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

<ListView
android:id="@+id/selector_dialog_listview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:cacheColorHint="#00000000"
android:scrollbars="none"
android:dividerHeight="1.0dip"
android:divider="#C4C4C4" />

</LinearLayout>

程序中：

final View view = LayoutInflater.from(this).inflate(R.layout.selector_dialog, null);
selectorDialog = new Dialog(DialerActivity.this, R.style.selectorDialog);
selectorDialog.setContentView(view);

final BaseAdapter adapter = new SelectorAdapter(DialerActivity.this, selectorList);
ListView listView = (ListView) view.findViewById(R.id.selector_dialog_listview);
listView.setOnItemClickListener(new OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//对话框中事件处理
}

});
listView.setAdapter(adapter);
selectorDialog.show();
selectorDialog.setCanceledOnTouchOutside(true);

WindowManager windowManager = getWindowManager();
Display display = windowManager.getDefaultDisplay();
WindowManager.LayoutParams lp = selectorDialog.getWindow().getAttributes();
lp.width = (int)(display.getWidth() * 0.9);
if(selectorList.size() > 7) {
lp.height = (int)(display.getHeight() * 0.9);
}
lp.alpha = 0.8f;
selectorDialog.getWindow().setAttributes(lp);

其实主要是通过WindowManager.LayoutParams给对话框设置属性。