Android如何使用样式创建半透明窗体

长平狐 发布于 2012/10/16 10:20
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本示例介绍如何使用Android系统样式和自定义样式创建半透明界面。

1. 定义清单文件(AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

      package="my.andriod.test"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <!-- 使用自定义半透明主题样式  android:theme="@style/Theme.Translucent" -->

        <activity android:name=".TranslucentActivity"

                  android:label="@string/app_name"               

                  android:theme="@style/Theme.Translucent">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <!-- 使用Android系统半透明主题样式

        <activity android:name=".TranslucentActivity"

                  android:label="@string/app_name"               

                  android:theme="@android:style/Theme.Translucent">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

         -->

    </application>

    <uses-sdk android:minSdkVersion="9" />

</manifest>

2. 定义字符串资源(strings.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="hello">Hello World, TranslucentActivity!</string>

    <string name="app_name">TranslucentActivity</string>

    <string name="activity_translucent">App/Activity/Translucent</string>

    <string name="translucent_background">Example of how you can make an

            activity have a translucent background, compositing over

            whatever is behind it.</string>

</resources>

3. 定义自定义样式(values/styles.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <!-- 继承Android系统的半透明主题样式,并指定半透明背景的颜色、隐藏窗口标题和前景色  -->

    <style name="Theme.Translucent" parent="android:style/Theme.Translucent">

        <item name="android:windowBackground">@drawable/translucent_background</item>

        <item name="android:windowNoTitle">true</item>

        <item name="android:colorForeground">#fff</item>

    </style>

</resources>

4. 定义半透明颜色(colors.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <drawable name="translucent_background">#e0000000</drawable>

</resources>

5. 定义布局文件(translucent_background.xml

<?xml version="1.0" encoding="utf-8"?>

<!-- Activity中显示文本 -->

<TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text"

    android:layout_width="match_parent" android:layout_height="match_parent"

    android:gravity="center_vertical|center_horizontal"

    android:text="@string/translucent_background"/>

6. 创建ActivityTranslucentActivity.java

package my.andriod.test;

 

import android.app.Activity;

import android.os.Bundle;

 

publicclass TranslucentActivity extends Activity {

    /** Activity首次创建时,调用这个方法 */

    @Override

    publicvoid onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        //填充布局

        setContentView(R.layout.translucent_background);

    }

}


原文链接:http://blog.csdn.net/fireofstar/article/details/7450217
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