How to set Transparent Background as a Custom Dialog Box in android

Question

I need to make my custom dialog box as a transparent.

Sample Code :

Dialog dialog;
@Override
protected Dialog onCreateDialog(int id) 
{ 
    switch(id) 
         


        

Answer 1

This question of yours describes exactly what my problem was. I tried every single solution I stumbled upon in this thread as well as in several more threads. Nothing worked. Finally I stumbled upon this thread and the corresponding answer.

I had to create a custom dialog class. So I did and it worked. Actually the following styles were sufficient for me:

colors.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="transparent_black">#66000000</color>
</resources>

styles.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:android="http://schemas.android.com/apk/res/android">
    <style name="custom_dialog_theme" parent="@android:style/Theme.Translucent">
        <item name="android:windowBackground">@color/transparent_black</item>
        <item name="android:windowIsFloating">true</item>
    </style>
</resources>

The code of the dialog class:

import android.app.Dialog;
import android.content.Context;

import my.app.com.android.R;

public class CustomDialog extends Dialog {
    public AddBookCustomDialog(final Context context) {
        super(context, R.style.custom_dialog_theme);
        this.setContentView(R.layout.add_book_dialog);
    }
}

And how I use this dialog in the activity code:

CustomDialog customDialog = new CustomDialog(this);
customDialog.show();

I don't know why I have to create a custom class in order for the theme to be taken into account. Now I have achieved what I wanted to do: transparent dialog. The next fight will be to position positive and negative buttons as long as I can no longer user the convenience methods of AlertDialog.Builder. Hopefully my code will prove of help to you.

Also notice the low value of alpha - maybe even try it with 00 so that you make sure whether your configuration works.

Answer 2

Just create a style and apply that to your dialog

    <style name="myDialogTheme" parent="@android:style/Theme.Dialog">
        <item name="android:windowBackground">@color/Transparent</item>
        <item name="android:windowIsFloating">false</item>
        <item name="android:windowNoTitle">true</item>
    </style>

Then, create your Dialog by using this theme;

    Dialog myDialog = new Dialog(this,R.style.myDialogTheme) {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.about_page);
        }
    };

Hope this will help you to achieve your goal.

Answer 3

If you are on API >= 11, you can try to set a theme to your Dialog like that :

new AlertDialog.Builder(mContext , android.R.style.Theme_Translucent_NoTitleBar_Fullscreen);

Or you can try to set the background transparent :

dialog.getWindow().setBackgroundDrawable(new ColorDrawable(0));

Answer 4

Try this,

layout.setBackgroundDrawable(new ColorDrawable(android.graphics.Color.TRANSPARENT));

add the code above after this line.

View layout = inflater.inflate( R.layout.about_page, ( ViewGroup ) findViewById( R.id.about_Root ) );

Answer 5

Use dialog instead of AlertDialog

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();

Answer 6

Use dialog.getWindow().setBackgroundDrawable(null) to remove the default background.

Here is the doc for reference:

/*** 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
   */