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：

[html] view
plaincopy

<?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：

[html] view
plaincopy

<?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：

[html] view
plaincopy

<?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：

[java] view
plaincopy

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。