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);
}
}