Android 透明 AlertDialog 有黑色背景

Transparent AlertDialog has black background

提问by superuserdo

I have a custom AlertDialogstyle that makes the AlertDialogbox transparent. It works fine except that when I inflate my desired transparent layout into the alert dialog window, it shows up with a black background. My goal is to have a completely transparent AlertDialogto where it seems as if there are only 4 buttons floating rather than a frame. Image one is what the custom dialog is giving me, image two is my desired or what I am aiming for.

我有一个AlertDialog使AlertDialog盒子透明的自定义样式。它工作正常，只是当我将所需的透明布局膨胀到警报对话框窗口中时，它显示为黑色背景。我的目标是让一个完全透明AlertDialog的地方看起来好像只有 4 个按钮浮动而不是框架。图一是自定义对话框给我的，图二是我想要的或我的目标。

Here is the code to the custom Dialog

这是自定义的代码 Dialog

<style name="CustomDialog" parent="android:Theme.Dialog">
    <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>

Here is what I am calling in my onCreate()

这是我在我的 onCreate()

AlertDialog.Builder imageDialog = new AlertDialog.Builder(TimeLine.this, R.style.CustomDialog);
inflater = getLayoutInflater();
View view=inflater.inflate(R.layout.tabs, null);![enter image description here][1]
AlertDialog a = imageDialog.create();
a.getWindow().setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));
a.setView(view, 0, 0, 0, 0);

a.show();

*Edit**** **The code for the tabs layout xml is here`

*编辑**** **标签布局xml的代码在这里`

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="match_parent"
    android:id="@+id/tabLayout"
    android:background="#000000ff">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button2"
        android:layout_marginTop="206dp"
        android:layout_below="@+id/button4"
        android:layout_alignStart="@+id/button4" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button3"
        android:layout_alignTop="@+id/button2"
        android:layout_alignParentStart="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button4"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:layout_marginTop="100dp" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="100dp" />
</RelativeLayout>

`

`

From testing to see what the source of the problem is, I have found out that it is true that the layout is transparent because when I change the background color of the layout, so does the alert dialog change. However when the layout is set to transparent, it seems that what is behind the inflated layout is black. And because of that I am unsure of what to do or whether it is the AlertDialogsettings or my layout code.

通过测试查看问题的根源是什么，我发现布局是透明的，因为当我更改布局的背景颜色时，警报对话框也会更改。但是当布局设置为透明时，看起来膨胀的布局后面是黑色的。正因为如此，我不确定要做什么，或者是AlertDialog设置还是我的布局代码。

回答by Rod_Algonquin

The problem is that AlertDialog builderis actually not good for designing transparent dialog and will and always have this black background which is actually a Theme for it, instead use the Dialogto create a transparent theme instead.

问题是这AlertDialog builder实际上并不适合设计透明对话框，并且会并且始终使用黑色背景，这实际上是它的主题，而是使用Dialog来创建透明主题。

sample:

样本：

Dialog alertDialog = new Dialog(this);
alertDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
alertDialog.setContentView(R.layout.tabs);
alertDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
alertDialog.show();

Using Dialogdoes not require any theme manipulation for transparent background so it is basically easy.

使用Dialog透明背景不需要任何主题操作，因此基本上很容易。

回答by Michael Shrestha

Have you tried using something like this:

你有没有试过使用这样的东西：

<style name="CustomDialog" parent="@android:style/Theme.Translucent">
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:colorBackgroundCacheHint">@null</item>
    ...
</style>

EDIT

编辑

Try this in java code

在java代码中试试这个

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

回答by Mehul Joisar

In your R.layout.tabs,

在你的R.layout.tabs,

Replace

代替

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="match_parent"
    android:id="@+id/tabLayout"
    android:background="#000000ff">

with

和

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="match_parent"
    android:id="@+id/tabLayout"
    android:background="@android:color/transparent">

回答by vikas kumar

Those who are having still problem creating custom transparent dialog or alert dialog, can use this combination. I also wanted to show custom background this is what worked for me.

那些仍然在创建自定义透明对话框或警报对话框时遇到问题的人，可以使用这种组合。我还想显示自定义背景，这对我有用。

getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));

example:-

例子：-

/**
 * alert dialog
 */

    public class ToolTipView extends AlertDialog {

        public ToolTipView(@NonNull Context context) {
            super(context);
            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
            getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        }

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.dialog_tool_tip_view);
        }

    }