Android中具有透明背景的对话框

Dialog with transparent background in Android

提问by Programmer

How do I remove the black background from a dialog box in Android. The pic shows the problem.

如何从 Android 的对话框中删除黑色背景。图片显示了问题。

final Dialog dialog = new Dialog(Screen1.this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.themechanger); 

回答by Zacharias Manuel

Add this code

添加此代码

 dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));

Or this one instead:

或者这个：

dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);

回答by LongLv

<style name="NewDialog">
    <item name="android:windowFrame">@null</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowTitleStyle">@null</item>
    <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
    <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>
    <item name="android:backgroundDimEnabled">false</item>
    <item name="android:background">@android:color/transparent</item>
</style>

use in java

在java中使用

Dialog dialog = new Dialog(this, R.style.NewDialog);

I hope help you !

希望能帮到你！

回答by Fahad Ishaque

I've faced the simpler problem and the solution i came up with was applying a transparent bachground THEME. Write these lines in your styles

我遇到了更简单的问题，我想出的解决方案是应用透明的 bachground 主题。用你的风格写下这些行

    <item name="android:windowBackground">@drawable/blue_searchbuttonpopupbackground</item>
</style>
<style name="Theme.Transparent" parent="android:Theme">
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:backgroundDimEnabled">false</item>
</style>

And then add

然后添加

android:theme="@style/Theme.Transparent"

in your main manifest file , inside the block of the dialog activity.

在您的主清单文件中，在对话活动的块内。

Plus in your dialog activity XML set

加上你的对话活动 XML 集中

 android:background= "#00000000"

回答by Ravi K. Sharma

Somehow Zacharias solution didn't work for me so I have used the below theme to resolve this issue...

不知何故，Zacharias 解决方案对我不起作用，所以我使用下面的主题来解决这个问题......

<style name="DialogCustomTheme" parent="android:Theme.Holo.Dialog.NoActionBar">
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:colorBackgroundCacheHint">@null</item>
</style>

One can set this theme to dialog as below

可以将此主题设置为对话框，如下所示

final Dialog dialog = new Dialog(this, R.style.DialogCustomTheme); 

Enjoy!!

享受！！

回答by zionpi

You can use the:

您可以使用：

setBackgroundDrawable(null);

method.And following is the doc:

方法。以下是文档：

  /**
    * Set the background to a given Drawable, or remove the background. If the
    * background has padding, this View's padding is set to the background's
    * padding. However, when a background is removed, this View's padding isn't
    * touched. If setting the padding is desired, please use
    * {@link #setPadding(int, int, int, int)}.
    *
    * @param d The Drawable to use as the background, or null to remove the
    *        background
    */

回答by duggu

Dialog pop up fill default black background color or theme color so you need to set TRANSPARENTbackground into Dialog. Try below code:-

对话框弹出填充默认的黑色背景颜色或主题颜色，因此您需要将TRANSPARENT背景设置为对话框。试试下面的代码：-

final Dialog dialog = new Dialog(this);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
dialog.setContentView(R.layout.splash);
dialog.show();

回答by erfan

if you want destroy dark background of dialog , use this

如果你想破坏对话框的深色背景，使用这个

dialog.getWindow().setDimAmount(0);

回答by IvonLiu

One issue I found with all the existing answers is that the margins aren't preserved. This is because they all override the android:windowBackgroundattribute, which is responsible for margins, with a solid color. However, I did some digging in the Android SDK and found the default window background drawable, and modified it a bit to allow transparent dialogs.

我在所有现有答案中发现的一个问题是没有保留边距。这是因为它们都android:windowBackground用纯色覆盖了负责边距的属性。但是，我在 Android SDK 中进行了一些挖掘，发现默认窗口背景可绘制，并对其进行了一些修改以允许透明对话框。

First, copy /platforms/android-22/data/res/drawable/dialog_background_material.xml to your project. Or, just copy these lines into a new file:

首先，将 /platforms/android-22/data/res/drawable/dialog_background_material.xml 复制到您的项目中。或者，只需将这些行复制到一个新文件中：

<inset xmlns:android="http://schemas.android.com/apk/res/android"
    android:inset="16dp">
    <shape android:shape="rectangle">
        <corners android:radius="2dp" />
        <solid android:color="?attr/colorBackground" />
    </shape>
</inset>

Notice that android:coloris set to ?attr/colorBackground. This is the default solid grey/white you see. To allow the color defined in android:backgroundin your custom style to be transparent and show the transparency, all we have to do is change ?attr/colorBackgroundto @android:color/transparent. Now it will look like this:

请注意，android:color设置为?attr/colorBackground。这是您看到的默认纯灰色/白色。为了让android:background自定义样式中定义的颜色透明并显示透明度，我们要做的就是更改?attr/colorBackground为@android:color/transparent。现在它看起来像这样：

<inset xmlns:android="http://schemas.android.com/apk/res/android"
    android:inset="16dp">
    <shape android:shape="rectangle">
        <corners android:radius="2dp" />
        <solid android:color="@android:color/transparent" />
    </shape>
</inset>

After that, go to your theme and add this:

之后，转到您的主题并添加以下内容：

<style name="MyTransparentDialog" parent="@android:style/Theme.Material.Dialog">
    <item name="android:windowBackground">@drawable/newly_created_background_name</item>
    <item name="android:background">@color/some_transparent_color</item>
</style>

Make sure to replace newly_created_background_namewith the actual name of the drawable file you just created, and replace some_transparent_colorwith the desired transparent background.

确保替换newly_created_background_name为您刚创建的可绘制文件的实际名称，并替换some_transparent_color为所需的透明背景。

After that all we need to do is set the theme. Use this when creating the AlertDialog.Builder:

之后，我们需要做的就是设置主题。创建时使用它AlertDialog.Builder：

    AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.MyTransparentDialog);

Then just build, create, and show the dialog as usual!

然后像往常一样构建、创建和显示对话框！

回答by Dileep P G

This is what I did to achieve translucency with AlertDialog.

这就是我使用 AlertDialog 实现半透明所做的工作。

Created a custom style:

创建自定义样式：

<style name="TranslucentDialog" parent="@android:style/Theme.DeviceDefault.Dialog.Alert">
    <item name="android:colorBackground">#32FFFFFF</item>
</style>

And then create the dialog with:

然后使用以下命令创建对话框：

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity(), R.style.TranslucentDialog);
AlertDialog dialog = builder.create();

回答by jigar

Try this in your code:

在你的代码中试试这个：

getWindow().setBackgroundDrawableResource(android.R.color.transparent);

it will definately working...in my case...! my frend

它肯定会工作......在我的情况下......！我的朋友