0011-APP-Activity-Translucent-Blur

半透明的Activity的展示

AndroidManifest.xml

<activity            android:name=".app.TranslucentBlurActivity"            android:label="@string/activity_translucent_blur"            android:theme="@style/Theme.Transparent" >    </activity>

styles.xml文件

  <style name="Theme.Transparent">        <item name="android:windowIsTranslucent">true</item>        <item name="android:windowAnimationStyle">@android:style/Animation.Translucent</item>        <item name="android:windowBackground">@drawable/transparent_background</item>        <item name="android:windowNoTitle">true</item>        <item name="android:colorForeground">#fff</item>    </style>

color文件

 <drawable name="transparent_background">#00000000</drawable>

java文件

/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package com.example.android.apis.app;// Need the following import to get access to the app resources, since this// class is in a sub-package.import com.example.android.apis.R;import android.app.Activity;import android.os.Bundle;import android.view.WindowManager;/** * <h3>Fancy Blur Activity</h3> *  * <p>This demonstrates the how to write an activity that is translucent, * allowing windows underneath to show through, with a fancy blur * compositing effect.</p> */public class TranslucentBlurActivity extends Activity {    /**     * Initialization of the Activity after it is first created.  Must at least     * call {@link android.app.Activity#setContentView setContentView()} to     * describe what is to be displayed in the screen.     */    @Override    protected void onCreate(Bundle icicle) {        // Be sure to call the super class.        super.onCreate(icicle);        // Have the system blur any windows behind this one.        getWindow().setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND,                WindowManager.LayoutParams.FLAG_BLUR_BEHIND);                // See assets/res/any/layout/translucent_background.xml for this        // view layout definition, which is being set here as        // the content of our screen.        setContentView(R.layout.translucent_background);    }}