How to make a dialog slide from bottom to middle of screen in android

Question

I want to show a dialog on my activity with animation. My dialog will slide from bottom of activity to middle of activity.

/****Edit****/

I'm sorry for my question is unclear. I mean that my dialog will be slide from bottom to middle but the bottom side of dialog is placed on bottom side of activity , like this following picture

Answer 1

For this, you need 2 animations and put this in the res/anim folder

1. slide_up_dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromYDelta="50%p" android:toYDelta="0%p"
    android:duration="@android:integer/config_longAnimTime"/>

2.slide_out_down.xml

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="@android:integer/config_longAnimTime"
    android:fromYDelta="0%p"
    android:toYDelta="100%p" />

Now you have to create a custom style in style.xml

<style name="DialogAnimation">
        <item name="android:windowEnterAnimation">@anim/slide_up_dialog</item>
        <item name="android:windowExitAnimation">@anim/slide_out_down</item>
</style>

Next is to extend the android Theme. Dialog theme in the same style.xml and give the reference to the custom style we created.

<!-- Animation for dialog box -->
    <style name="DialogSlideAnim" parent="@android:style/Theme.Dialog">
        <item name="android:windowAnimationStyle">@style/DialogAnimation</item>
    </style>

And finally, call this style when you create the dialog like this.

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

yep...Now the Dialog is ready to slide.....!!

Update:

As @MichealP suggested, this will place the window at the bottom

getWindow().setGravity(Gravity.BOTTOM); 

and modify the style to remove tittle and background

<item name="android:windowBackground">@null</item> 
<item name="android:windowFrame">@null</item> 
<item name="android:windowNoTitle">true</item>

As @sikni8 suggested this will make the black border transparent

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

Answer 2

I tried all the answers in here and it don't work for me. I know all that answers are written long time ago. So let me show how I get it to work. I followed this article.

In short : create res/anim/slide_up.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate 
      android:duration="@android:integer/config_mediumAnimTime" 
      android:fromYDelta="100%" 
      android:interpolator="@android:anim/accelerate_interpolator" 
      android:toYDelta="0">
    </translate>
</set>

then, create res/anim/slide_bottom.xml

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate 
        android:duration="@android:integer/config_mediumAnimTime" 
        android:fromYDelta="0%p" 
        android:interpolator="@android:anim/accelerate_interpolator" 
        android:toYDelta="100%p">
    </translate>
</set>

Then add a style in res/values/styles.xml

<style name="DialogAnimation">
    <item name="android:windowEnterAnimation">@anim/slide_up_dialog</item>
    <item name="android:windowExitAnimation">@anim/slide_out_down</item>
</style>

Now you can set this animation style to your dialog or alertdialog box like below.

Dialog dialog = new Dialog(this);
dialog.getWindow().getAttributes().windowAnimations = animationSource;

Or,

Dialog dialog = new Dialog(this);
WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
lp.copyFrom(dialog.getWindow().getAttributes());
lp.width = WindowManager.LayoutParams.MATCH_PARENT;
lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
lp.gravity = Gravity.BOTTOM;
lp.windowAnimations = R.style.DialogAnimation;
dialog.getWindow().setAttributes(lp);

I showed example only for dialog boxes, but as I said before you can use this method for alert dialog boxes too.