对话框样式的Activity

一、定义一个主题样式 Theme.CustomDialog 实现个性化的对话框。
1、AndroidManifest.xml 文件中，申明 activity 的主题使用自定义对话框样式。

<activity android:name=".app.CustomDialogActivity"
                android:label="@string/activity_custom_dialog"
                android:theme="@style/Theme.CustomDialog">  //好像应该是android:theme="@style/Theme.Dialog">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.SAMPLE_CODE" />
            </intent-filter>
        </activity>

<activity android:name=".app.CustomDialogActivity"                 android:label="@string/activity_custom_dialog"                 android:theme="@style/Theme.CustomDialog">             <intent-filter>                 <action android:name="android.intent.action.MAIN" />                 <category android:name="android.intent.category.SAMPLE_CODE" />             </intent-filter>         </activity>

2、res/values/styles.xml 样式文件中定义一个对话框主题样式，这里继承了 android:style/Theme.Dialog 主题，并且窗口样式 android:windowBackground 引用了 @drawable/filled_box

<style name="Theme.CustomDialog" parent="android:style/Theme.Dialog">
    <item name="android:windowBackground">@drawable/filled_box</item>
</style>

<style name="Theme.CustomDialog" parent="android:style/Theme.Dialog">         <item name="android:windowBackground">@drawable/filled_box</item>     </style>

3、res/drawable/filled_box.xml 定义了 Shape 类型的 drawable（抽象的可画区域），最终是通过这个来实现新对话框的样式。

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#f0600000"/>
    <stroke android:width="3dp" color="#ffff8080"/>
    <corners android:radius="3dp" />
    <padding android:left="10dp" android:top="10dp"
        android:right="10dp" android:bottom="10dp" />
</shape>

<shape xmlns:android="http://schemas.android.com/apk/res/android">     <solid android:color="#f0600000"/>     <stroke android:width="3dp" color="#ffff8080"/>     <corners android:radius="3dp" />     <padding android:left="10dp" android:top="10dp"         android:right="10dp" android:bottom="10dp" /> </shape>

二、个性化Dialog小图标，主要代码如下:

Override
    protected void onCreate(Bundle savedInstanceState) {
        // Be sure to call the super class.
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_LEFT_ICON);

        // See assets/res/any/layout/dialog_activity.xml for this
        // view layout definition, which is being set here as
        // the content of our screen.
        setContentView(R.layout.dialog_activity);

        getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,
                android.R.drawable.ic_dialog_alert);
    }

Override  protected void onCreate(Bundle savedInstanceState) {         // Be sure to call the super class.         super.onCreate(savedInstanceState);                  requestWindowFeature(Window.FEATURE_LEFT_ICON);                  // See assets/res/any/layout/dialog_activity.xml for this         // view layout definition, which is being set here as         // the content of our screen.         setContentView(R.layout.dialog_activity);                  getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,                  android.R.drawable.ic_dialog_alert);     }

1、申请设置个性化小图标，需在 setContentView(R.layout.dialog_activity) 之前调用。

requestWindowFeature(Window.FEATURE_LEFT_ICON);

requestWindowFeature(Window.FEATURE_LEFT_ICON);

2、设置小图标

getWindow().setFeatureDrawableResource(Window.FEATURE_LEFT_ICON,
                android.R.drawable.ic_dialog_alert);